US1305956A - Signaling device - Google Patents

Description

J. W. WHITE.

SIGNALING DEVICE.

APPLICATIGN FILED MILZI.

Pntvni'ed .lune 3, 1919.

SHEETS--SHEET l.

Mn.: www womumo wasumcmu4 n c 1. W. WHITE.

SIGNAUNG DEVICE.

APPLICATION FILED JAN.25, naar.

utented June 3, 1919.

I. W. WHHE.

SIGNALING DEVICE` APPUCATION men 1AN.25. |911.

1,305,956. Patented June 3, 1919.

IWI/Vinile M JOHN W. WHITE, OF BROOKLYN, NEW YORK.

SIGNALING DEVICE.

Specification of Letters Patent.

Patented June 3, 1919.

Application led 'January 25, 1917. Serial No. 144,390.

To all whomy 'it may concern:

Be it known that I, JOHN W. WHITE. a subject of the King of Great Britain, an a resident of the city of New York, borough of Brooklyn, in the county of Kings and- State of New York, have invented a new and Improved Signaling Device, of which the following is a full, clear, and exact description.

In a general way my invention relates to signaling devices, and more particularly to transmitting and switching mechanisms and cimnits` It could also be called a universal transmitting and switching system and de- YlCG.

The primary objects of my present invention are:--

o provide a signal-transmitting switching and supervising mechanism which can 'be economically constructed of few parts and in such a way that it can be readilyY adapted to the requirements of all forms of signaling service, of all types, whether actuated 'by manual, mechanical, electrical, fluid or gaseous means; which can be arranged to give signals indicating a particular station, location of call-box, alarm-device or the like; which will perform the operations which have not hitherto been accomplished except by ythe use of more than one set of devices; which can reset itself after transmitting its signals or a part of them; which can out out or delay its signals if the particular signaling system with which it is used requires it; which can perform switching operations a predetermined length of time after the mechanism commence-s to operate; which will have a sufficient store of energy to allow it to do its work man v times without attention; which can give locally, or transmit to a distance a trouble signal when faults occur in the system, and restore itself to normal as soon as the'fault is removed; which will conserve its store of energy by transmitting no more signals than are necessary to give the call or alarm, (as for instance in case of fire, where the fire-detecting device might remain in operation for a considerable length of time after the required number of calls or alarms had been given), but yet would re-set itself to normal 'as soon as the inducing cause (in this case the fire-detecting device), had ceased to function; which will be capable of having its usual signals modified by the varying local conditions in such a way that the recipient of the signals cali tell the character or duration of the condition from the nature of the modification; also to provide an electrical supervisory circuit for the wiring of call and alarm systems by which the occurrence of a fault or derangement will be detected, and notice thereof transmitted; and which will act as an automatic watchman or supervisor, and ive notice of the conditions existing from time to time.

Ihave'provided a signal-transmitting and switching system and mechanism which can be economically constructed of few parts, which can be readily adapted to the requirements of all forms of signal service whether these are actuated by manual, mechanical, electrical, fluid, or gaseous means, such as those indicating fire, burglary, changes of water-level, changes of temperature, the condition of sprinkler systems, and many others, which require that a call or alarm should be transmitted, the call lbeing of such a character that the particular location from `which the 4call originated can be distinguished.

With my invention I have eliminated the human element to a large degree, and have constructed a signaling system which requires the minimum of attention, and therefore is less expensive to maintain than those systems which require the services of an attendant to re-set or re-adjust'them after the transmission of each signal, call or alarm.

My invention comprehends a device which includes means for automatically and positively indicating faults or derangcments which might render itself or the signaling system of which it is a part, ineffective in time of need, and for giving notice of such faults either locally or at a distance, or both, and then restoring'itself to normal when the faulty condition has been removed.

My invention also provides means by which the signals ordinarily transmitted can 'be modified by the Varying Conditions of the signaling system of which it is a part, without destroying the distinctive character of the usual signals.

My invention is a combined trouhle" and call system, wherein I have made' one piece of apparatus perform the functions of transmitting both a trouble signal and a call or alarm, separately or in consecutive order, whereas in the present forms of transmitting devices each function is performed by a separate piece of mechanism; and l have accomplished these results with a fewer rions changes in its structure may be made without departing from the spirit and Scope of the invention.

By the combination of the signaling mechanism, the switching mechanism and the supervisory circuit, I have invented an automatic watchman to supervise call-systems, signaling systems, alarm systems and the like, and have made it possible for this vwatchman to report its findings.

In givin a descrlption of my invention, I will expiin its action and use with one form of si naling-systcm; for instance, an automatic re-alarm system. `No more of the fire-alarm will be shown than is necessary to explain the operation of my own device, and as two electrical contacts and annunciators operated by that system are sufficient, I will omit all other parts of y In the accom anying drawings, 'w rich illustrate one em odiment of the invention and wherein similar characters of reference indicate corresponding parts inl all the views, v f f Figure 1 is a mitting mechanism; y

F ig. 2 is a front view of the same; Fig. 3 is a sectional elevation on the line 3 3, Fig. 1, or with the front plate removed;

Fig. 4 is a sectional view on the line 4 4, Fig. 1;

Fi 5 is a side elevation similar to that of Fig. 2, with a portion of-the front plate removed to show the relative positions of the contact members and the controlling mechanism when the mechanism is in the normal position;

Fig. 6 is a similar view, excepting that it shows the relative positions of the contact members and the controlling mechanism after transmitting a trouble call and three fire calls;

Fig. 7 is a side view of the apparatus' Fig. 8 is a vertical section on the line y s s, Fig. a;

Fig. 9 is a detail section on the line 9 9,

Fig. 10 is a fragmentary perspective view of stopping means;

Fig. 11 is a vertical section of the rider disk and the riders on the armature levers; Fig. 12 is a diagrammatic view of the 'vent the spring top plan view of signaling wheel and the group of switches associated therewith;

Fig. 13 is a diagrammatic view showing the supervisory circuit and its relation to the cam-actuated switches, with the alarm system circuit open;

Fig. 14 is a similar view with the alarm system circuit closed.

The signal-transmitting and switching mechanism is supported by two plates 1 and 2, which are held apart by distance-pieces 3. The `clockwork is supported between these plates; the electro- magnets 4 and 5 are preferably held at one side by the plates 6, and the signal-wheel 7 and groups of switches 8 and 9 are preferably mounted on the outside of the front plate, so as to be accessible.

The main spring 10 is attached at its inner end to the shaft 11 of the main driving wheel 12, and its outer end is held by one of the pillars or distance-pieces 3 of the clockwork movement. The end of the shaft 11 projects through the front plate 1 and is squared in order that it may be turned by a key 13 when winding up the main spring. A ratchet 14and awl 15 is fitted to prerom flying back when wound, and to allow the main wheel to.re main at rest while the springV is being wound, as in an ordinary time keeping clock.`

The clockwork consists of a train of four wheels 12, 16, 17, 18, the first being the main driving wheel carried on the winding-shaft 11, which shaft also carries the main spring. The main wheel drives the second Wheel 16 .in shaft 19 through pinion 20; wheel 16 drives the third Wheel 17 onshaft 21 by means of the pinion 22, and the third wheel drives the fourth wheel 18 `through the pinion 23, both on shaft 24.v This fourth wheel, being the last in the train, is the eccape-Wheel. Its teeth engage with the pallets 25 on shaft 26 and osclllate the pallets when the train of wheels is running. The escape-wheel, together with the pallets, comprise the escapement, and form a simple means of regulating the speed of the wheelwork when running. Fastened to the shaft 26 there is a pendulum-rod 27 andtimingweight 28 to further regulate the speed of the wheelwork. Raising the weight on the rod increases the speed, and lowering it decreases the speed. The weight 28 can be clamped on the rod in any desired position by a screw. The shaft 91 of the third wheel is extended through the front plate for the purpose of carrying the signal-wheel 7.

The main spring is normally in the wound-up condition, and the mechanism is scribed later. The magnets and supervisory circuit derive their power from a battery or other source of electricity. The magnets are preferably of the inclosed tubular type. 4 is called the trouble magnet, because its action results in a trouble-calln being. transmitted. The other magnet 5 is named according to the class of signaling service which is associated with it. In the present case, it would be called the fire magnet, because it acts t0 send fire calls. Magnet 4 is normally energized, and prevents the wheelwork from running, it starts the mechanism when it is denergized. Magnet 5 is normally denergized, and it starts the mechanism when it is energized. It will be seen therefore that the magnets act oppositely. The electrical circuits and the stops are s0 arranged that magnet 4 must always be deenergized. before magnet 5 can be energized, and so that magnet 5 cannot act until magnet 4 has done its work of allowing the signal-wheel 7 to make one revolution.

Both armature- levers 29 and 30 have tension- springs 29 and 30 which tend to pull the armatures away from their respective magnets. The pull of each tension-spring is adjustable by a knurled nut 31, and when properly adjusted, the screws 32 can be tightened to prevent movement.

On the pallet-shaft 26 there is an upwardly-projecting piece 33 with a pin 34 driven through it at the upper extremity. This pin will in future be caller the stoppin. It will be seen that as the pallets are oscillated by the teeth of the escape-wheel 18, the stop-pin will also oscillate because it is fastened to the same shaft as the pallets. The upwardly-projecting piece 33 carrying the stop-pin oscillates between the two armature- levers 29 and 30, and each of the latter A has upward extensions called Stops 35 and 36 for engaging with the stop-pin at the proper times, for the purpose of bringing the wheelwork to rest. The stop 35 on the armature of magnet 4 engages the stop-pin only when the armature is in the attracted position, whereas the stop 36 on the armature of magnet 5 engages the stop-pin only when the armature is in the unattracted position; and it will be shown as the description proceeds that the two stops 35 and 36 cannot engage with the stop-pin at one and the same time.

Both armature- levers 29 and 30 are fulcrumcd on the sha ft 37. This shaft is made easily removable without dismounting the whole mechanism. It can be withdrawn from between the plates by removing the screws 38, which hold the bearing piece 39. This arrangement for dismounting the armature-levers is simply a convenience, and is useful in assembling and adjusting the parts durin manufacture. The armatures 40 and 41 o? the magnets 4 and 5 are pleces of iron which are attracted when their respective magnets are energized. They are fastened to their armature-levers by fixingscrews 42. Adjustable screws 43 with locknuts 44 are fitted to adjust the distance between the armatures and their magnets. They also adjust the travel of the left-hand ends of the armature-levers; and being made of brass or other non-magnetic metal, they prevent the armatures from sticking to vthe magnets by the residual magnetism. The travel of the armature-levers in the opposite direction can be adjusted by the screws 45 on one of the distance members 3.

have previously stated that my invention would be described in connectlon with an automatic lire-alarm system. When associated with such a device, it is obvious that my signaling arrangements would be adapt ed for transmitting lire-calls, and my switching arrangements would be those required for lire-alarm purposes. I will therefore describe the means by which a fire-alarm call is transmitted to lire-headquarters or to a central call station. In such a ease it is usual to indicate the location of the premises on lire, by intermittently interrupting the How of electricity in a wire leading from the fire headquarters or central call station to the remises, and there connected through a set oswitches, by means of a signal-wheel. The interruptions of current are made to 0ccur in the form of a code, or set of numbers, by which one fire-alarm installation can be distinguished from all others. Each installation or station has a number diiering from others on the same wire. I have shown the number 312 as the code-call to be transmitted by my device.

This number is cut on the periphery of my signal-wheel 7 in the form of projecting teeth or notches, with spaces between the figures. I have arranged the signal-wheel to be rotated in the direction of the arrow, and have placed a set of switches through which the wire to lfire-headquarters is connected, adjacent to it; so that in rotating, the teeth will separate the switch-spring 45 and contacts 46 and 47 and interrupt the current according to the figures 3 space 1 space 2, which will be indicated or recorded as 312 by suitable apparatus at the receiving-station, enabling the attendant there to (listingush the location of the fire.

As it is sometimes necessary to cause the wire to be both grounded and interrupted by the signal-wheel, I have placed aground 48 on the wheel so that each tooth will touch the spring in passing, and thereby ground the wire according to the code 312. The signal-wheel in the drawings is arranged to make a total of four revolutions for one lire-alarm call,and therefore the number 312 will be repeated and transmitted four times, but it must be understood that. a greater or lesser number of revolutions or rounds can be arranged for, as required.

It has been stated that the shaft 21 of the third wheel 17 carries the signal-wheel 7. Between the plates it also carries a disk 48 which I Call the riding disk having a projecting Bange 49 at the periphery. Both the periphery of the disk and the ange have a notch 50. The armature-lever 3() of magnet 5 has a foot 51 which I call a rider which rides over or upon the uncut portion of the disk while the disk is rotating. When the notch has been carried around to a position immediately below the rider, the rider is allowed to fall into the notch, and the mechanism will be brought to rest, provided that the armature-lever 30 is not in the energized position. If it is, the rider is prevented from falling into the notch, and the wheels will continue to run for at least another revolution of the riding-disk, but never for more revolutions than the total allowed, which in this case is four.

Similarly, a rider 52 in the form of an L-shaped lug on the armature-lever 29, rides under the uncut portion of the flange 49, whileithe disk is rotating. When the notch 50 coincides with the position of the rider 52, the magnet 4, if energized, will stop the wheels by drawing the rider up into the notch, and bringing the stop into action.

As neither of the riders can enter the notch 50 until the signal-wheel has made a complete revolution, there is no danger of the transmitted signal being cut short. It the signal-wheel once commences to move, it must complete a revolution, and transmit at least one full round of the signal, and neither of the magnets can move to stop the mechanism until a full round has been transmitted.

When the signal-transmitting mechanism is in its normal condition, magnet 4 is energized, and the corresponding armaturelever 29 is attracted. Stop 35 is then holding stop-pin 34 and is preventing the wheels from running. Upon the magnet 4: becoming denergized the stop 35 is removed from pin 34 and the wheels will run far enough to allow the signal-wheel to make one revolution. In making this revolution, the teeth of the signal-wheel will. operate upon the switch spring 45 and transmit a trouble call. Having once commenced to move, the magnet 4 can not attract its armature 29 until the revolution of the signal-wheel is finished, whether or not the magnet should become energized, because the rider 52 has passed under the rim of the notched disk 48, and must remain there until the notch or cut-out part is brought around to coincide with it.

The shaft 21 carries the third wheel 17, the signal-wheel 7 and the notched riding- 53, which disk 48, and also a pin or tooth asoman revolves in the same time as 'the signalwheel. As this pin revolves, it engages with the large teeth 54 of the sector 55, and moves the sector to the right at the rate of one tooth for each revolution of the pin. A pawl or catch 56 pivoted on the same shaft as the armature-levers of the two magnets has a tooth 57 that drops into engagement with the small teeth 58 of the sector as each large tooth is driven forward. The sector therefore has a step-by-step motion. The distance traversed by the sector is thus dendent upon the number of times the signal-wheel has revolved. If, however, the front magnet 4 should attract its armaturelever before the sector has traveled to its limit, the pawl 56 would be lifted out by the lifting-pin 59 carried by armature-lever 29, and the sector would fly back to the position shown in Fig. 5, being driven back by the small coiled spring 60 on its shaft or fulcrum 61. The front magnet can not, however, attract its armature at any other times than at the completion of a signal-wheel revolution, ibecause the rider attached to the armature-lever is held under the rim of the riding-disk, and the lever can not move upward until the notch in the rim coincides with the rider. When this point is reached, the front magnet, if energized, can attract its armature, the armature-lever rises and engages the stop-pin, the wheels are brought to rest, and the sector flies back to the position shown on Fig. 5,

The shaft or fulcrum 61 of the sector carries a set of cams or notched disks 62 and G3 for operating the group switch 9. It will be seen that by step, I can arrange the cams to do switching operations at various periods in the total time taken by the sector to travel between its limits; and can also restore or re- Set the switches at any stage within those limits, by the operation of the front magnet tl,ivhich in turn is governed b the immediate conditions of the signa ing system, through the contacts 64 and 65 shown in Figs. 13 and 14.

For the purpose of modifying the signals given by the action of the signal-wheel upon the upper set of switches, I have arranged one or more bell-crank levers 66 fulcrumed at or about their centers, on the front plate of the clockwork. One lever only, 66, is shown in the drawings. The one end of this lever is acted upon by the cam G3 carried by the shaft 61 of the sector; the other end of this lever is used to open or close contacts 67 and 68 of the upper set of switches, by raising or depressing the switch-blades. In this case, I wish to modify the signals transmitted by the signal-wheel, in order to distinguish the trouble call from the iire calls.

I have described how four signals repreas the sector moves step` senting the number 312, are transmitted by the revolution of the signal wheel. It must be understood that the four signals are really three fire calls, preceded by one trouble call. All the four calls are transmitted as 312, but the trouble-call is modified slightly,

to distinguish it from the others. I have shown in Figs. 2 and 12 that there is a notched disk 69 between the signal-Wheel and the front late of the clockwork-movement.` The dis 69 is fastened to the signal- Wheel and revolves with it. The relation of the notch in the disk, to the teeth of the signal-wheel, is such that the last tooth has passed be ond the switch-spring 45 before the tooth 770 of the switch-spring 68 can fall into the notch 71 of the disk. In falling into the notch, the switch-blade 68 opensits contact. This interrupts the flow of current in the line to the fire-headquarters immediately after the number 312 has been transmitted, but the interruption' being in the form of a long break, the actual signal transmitted becomes 312 which is recognized as a trouble call originating at station 312. Any other signal or set of signals could be used instead of a dash.

During the time the signal-wheel is revolving for the second, third and fourth times, the cam 63 on the sector shaft 61 has raised the bell-crank lever to a position where it supports switch-blade 68 and prevents its tooth from falling into the notch of the disk 69, thus eliminating the long break or dash from the number 312. Three calls of 312 without the dash would be recognized as a fire-call from station 312,

but less than three calls would show that the fire-detecting device 6i or 65 had opened its contact. When the contacts of this device open, the front magnet -i is again energized, the armature-lever and pawl are lifted, and the sector flies back, restoring all the cams, switches, and the bell-crank lever to normal.

It will be obvious that the sector could heY enlarged into a complete wheel, with more than four teeth, when a greater length of travel is required. This would give more steps and require a longer time in which to perform its motion. Taken by itself, the sector with its cams and switches forms the time-switch.

In conjunction with the re-setting action of the pawl 56 and front magnet 4, the sector with its cams and switches provides a means of delaying the closing and o ening of the switches until a certain num er of stepping-up motions have been imparted to the sector; and as the magnets are controlled liv the immediate conditions of the signaling system, in this case being controlled by the opening and closing of the device 64 or 65 on Y the fire-alarm. the cams might .not travel fri* enough to act upon the switches at all. Under this condition, the sector would Hy back to normal as soon as the device 64 or 65 opened; or to be exact, as soon as the signal-wheel had completed a revolution after the device 64 or 65 opened. The signaling mechanism would thus act as if it had started to give a fire-alarm call, and had changed its mind, so to speak, because the fire-detector had reported that the fire had beenl put out.

Furthermore, the sector with its cams and switches, in conjunction with the re-setting arrangements of the pawl and magnet, also with the signal-Wheel with its associated switches, also with the bell-crank lever 66 and its action upon the signal-wheel switches, all combined together, provide a means of varying the character and duration of the signals to an unlimited extent. By the actions and interactions of the separate parts, when used either separately or in combination, I can adapt the switching arrangements and time-elements of operations to the needs and requirements of all forms of signaling service.

Again, as the operations of the magnets and switches are de endent upon the conditions of the signaling system with which my invention is used, I have rovided a means of supervising these conditions from alistance, thus making my apparatus into a universal, automatic watchman.

The shaft or fulcrum 61 on which the sector 55 and the switch- cams 62 and 63,ro tate, also carries between the plates an additional cam 73. The latter engages with :i roller 74 carried by an extension 75 of the armature-lever 30 of magnet 5. It will be noticed that when the sector is in the normal position, as shown in Fig. 5, the cam forces the roller upward, and compels the armature lever to assume the attracted position, although the magnet'at this time is not energized. This is for the purpose of removing the stop 36 out of the way of stop-pin 34, so as to allow the stop 35 on the other armature-lever 29 to do the work of keeping the mechanism at rest.- Unless the stop 36 was lifted out of the way, the stop-pin would be held by two'stops, and the falling of ariiiature-lever 29 when magnet 4 became dee'nergized could not start the wheelwork, as it must do at the commencement of all operations performed by the mechanism.

Before the signal-wheel has completed its first revolution, the pin 53 has picked up the first large tooth of the sector 55, and has carried the sector forward to a. point Where it can be held by the pawl tooth 57 dropping into the corresponding small toothon the periphery of the sector. In moving forward, the cam 73 on the sector-shaft 61 has removed its support from under the roller 74. The armature-lever 30 can then fall as soon as the position of the rider 51 coincides with that of the notch 50 in the riding-disk 4S, provided that magnet 5 is not energized when that position is reached. 1f it falls, it stops the mechanism by bringing the stop 36 in the way of the oscillating stop-pin 34. The roller 74 is not supported by the cam 73 at any other time than when the mechanism is standing at normal, as shown, in Fig. 5.

The electrical supervisory circuit is shown in Figs. 13 and 14. The battery or other source of electricity 75 supplies current to the windings of both electro- magnets 4 and 5, and through the local call-bell 76. In the normal condition of the supervisory circ-uit, current Hows continuously through the callbell, and through both magnet-windings. The supervisory circuit is therefore of the closed-circuit type. The winding of electro-magnet 5 is of low resistance, whereas the Winding of electro-magnet 4 is of high resistance, and the latter has many turns'of wire `as compared with the other. The amount of electricalenergy, which is sufficient to keep magnet 4 energized is insuiicient to energize magnet 5, Aor cause the call-bell to sound. Magnet 4 is of such a resistance that although it can normally produce sufficient magnetism to keep its armature attracted, it will limit the total flow of electricity from the battery to a comparatively low value, partly to economize current and partly to prevent the callhell and magnet 5 from operating.

The battery has a ground connection 77. This 'ground forms no part of the elosed portion of the supervisory circuit as shown in Figs. 13 and 14. It is used for the purose of detecting the presence of a ground ault which might occur at another point in the circuit. It should be understood that the return wire 7S from the magnet 4to the battery might be replaced 'by another ground connection Without making the slightest difference in the operation of my closed circuit., but in this case the battery would How from ground to ground, and the ground connection 77 would then be a part of the closed circuit.

Normally the battery current is circulating throughout the closed circuit, and by keeping magnet 4 energized, the transmitting mechanism is at a standstill, because the stop 35 is in engagement with the stoppin 34. If no w a break were to happen 1n any part of the closed circuit, the magnet 4 would become denergized, and the mechanism would run until the signal-wheel had made one revolution, thereby transmitting a troubleca`ll; but at the termination ot the first revolution, the wheel-work would be brought to rest by the engagement of stop 36 with the stop-pin 34.

Again. if a ground fault occurred on any part of the wiring between the nongrounded side of the battery and the commencing end 79 of the winfding of the magnet 4, this magnet would be short-circuited and robbed of its energy, and a troublecall would result. A ground fault might occur on the other side of the closed circuit, anywhere between the finishing end 80 of the magnet 4 and the grounded side of the battery, but as this wire is already grounded at 77, the closed' circuit would not be affected in any way, and the mechanism would remain at rest.

Furthermore, if the battery should weaken to such an extent that it could no longer hold the armature of magnet 4, the clockwork would transmit a troublemcalh Having now explained above how the supervisory circuit supervises itself, I will describe the manner 'in which it supervises the signaling system with which it is used.

It has been stated previously that one of the primary objects of my invention is to rovide a supervisory system and apparatus or use with all forms of signaling service. It is immaterial by what means these other devices perform their functions, except that they be made to open and close one or more electrical contacts connected to my supervisory circuits and devices, in order that their operation may be supervised and their calls transmitted. For instance, an automatic fire-alarm system must be arranged to have one or more contacts 64 or 65, which 1 connect across the Wires 78, 81, of my supervisory circuit. When the contacts are open. as shown in Fig. 13, they have no eli'cct whatever upon the supervisory circuit. but if one or more of these contacts are closed by the`action of the irealarm as 64 in Fig. 14, an additional path for the current is opened between the points 82 and 83 oi' my circuit. This instantly results in an in creased How ofbattery current through the call-bell, magnet 5 and contact 64, back to .the battery; and it also instantly deprives magnet 4 of much of its normal current by putting a sh'ort-clrcult, or partial short-circuit, across its terminals. The effect therefore is to reverse the previously existing conditions in the two magnets. Magnet 5 hecomes energized, and magnet 4 becomes dcenergized. The latter no longer attracts its armature and therefore the clockwork commences to run, and the signal-wheel will start to transmit a trouble-call. .it the same instant the call-bell 76 commences to sound.

During the transmission of the trouble call, whether or not the magnet 5 has remained energized, the corresponding armaturc-lever 30 is in the attracted position. lwing heid in this position by the ram 73 under the roller 74. Immediately before thc comu pletion of the tro11l1le"call. the pin 53 carries forward the first large tooth of the sertor 55, which in turn removes the cam 73 f rom under the roller 74. The pawl 5G also engages with and holds the first small tooth of the sector. After the cam has removed its support from the roller, the armaturelever 30 is still held in the attracted position by the rider running around on the periphery of the ridingdisk 4:8 until the notch 50 and the rider coincide in position.

Meantime, the other rider 52 has been under the flange 49 of the riding-disk. Vhen both riders reach the notches 50, one of two things can ha en:

(l) If the contact 64 should have opened, magnet 4 Will be energized again, the armature-lever 29 will be attracted, the pawl 56 will be released from the sector; the sector will Hy back to normal, as in Fig. 5, and the clockwork will again be held by the stop 35 being raised yinto engagement with the stoppin 34.

(2) If the contact G4 should have remained closed, magnet 4 will remain denergized, and its rider 52 will not enter the notch 50; magnet 5 will remain energized, and its rider 51 will also not enter the notch 50; (onsequently the clockwork will contiuue to run. and the signal-wheel will trans` mit a second call, similar to the first, except that thee-Xtra long dash iliade by the action ot the bell-crank lever 6G will be eliminated, owing to the bell-crank lever 66 supporting switch blade 45 on the secondirevolution of the sigual-\\'heel, but not during the first.

On the completion of the second call, the mechanism may again do one of the two things mentioned above. It may re-set itself to normal, or may continue for a third call, again depending on the contact 64 being open or closed.

On the completion ofthe third call, the mechanism will either be reset, or will continue for a fourth call, still depending on the Contact G4 being open or closed.

Meantime the sector has been moving forward step by step.

On the completion of the fourth call, if the Contact 64 is open, the mechanism will be re-set; but if the contact 64 is still closed, then the mechanism will be brought to rest electrically, by means to be described later. The Asignal-wheel will now have transmitted one trouble call, followed by three lire calls, the former being distinguished by the addition of a long dash after the number 312, which number is the code-call from this particular transmitter.

The means by which the transmitting mechanism is brought to rest at the end of the fourth round, although the contact 64 is still closed, will now be explained. Reference to Figs. 13 and 14 will show that the winding of magnet 5 has a switch with contacts 84 and 85 shunted across its terminals.

'of magnet 5. In other words, magnet 5 is short-circuited, and therefore it will no longer attract its armature. The rider 51 of armature-lever 30 then falls into the notch 50 as soon as the round is finished; the stop 3G engages stop-piu 34 and the wheelwork is brought to rest in the position shown in lF i .(3.

s long as the fire-alarm Contact (i4 remains closed, the position shown in Fig. (i will be maintained, but the instant th is eon tact is opened, the magnet Je will be renergized, and the mechanism will re-set itself to normal, Fig. 5, ready to transmit another call or set of calls.

During the whole period when the I'ire alarm contact was closed, the local call-bell 76 received sufiicient currentv to make it sound, thus giving a local alarm of fire.

At a point when the troublecall has been nearly completed, the cum (33 closes the switch contacts S6 and ST and the buzzer 8S will sound; and it will continue to sound until the transmitter has re-set itself. The buzzer is supplied with current from the. battery 89. It is used for the purpose of calling the attention of anyone in the vicinity, that the transmitter is not in its normal position.

An annunciator or other visual signal 90 is joined in series with each of the. contacts Gi and G5 of the tire-alarm system, for the purpose of showing which of the contacts has closed.

In cases where the. shorteircuiting of magnet 5 would allo-w too unich current to pass through the fire-alarm contacts, I use a differential winding', one section 91 being' in the closed supervisory circuit and the seetion 92 being connected with the switch contacts 84 and 85. By connecting the winding 92 so as to produce the opposite polarityr to that. of the winding 91, the closing of the switch contacts 84: and 85 at the end of the fourth round will neutralize the magnet and thus producethe same effect a shortcircuit across a single winding. Then the winding 92 is used, it must produce approximately the same amount of magnetism as the winding 91, but, of course, of opposite polarity.

The pawl 56 is yieldingly held down by a spring 93, which, as shown in Fig. 3, is connected with a bracket 94 fastened to the block 95, which carries the pawl. aud the other end of the spring is connected with an arm 96 carried by the pin 59 on the armature lever 29.

lnally energized and the other normally deenergized. Y

10. In a device of the class described, the combination of a clockwork, a signal wheel driven thereby, a wheel connected with the clockwork and having a notched and flanged periphery, `armature levers having means for stopping the clockwork, riders on the levers and cope `ating with the notched and flanged periphery of said Wheel, whereby the signal `wheel is required to make a complete revolution before the clockwork can be stopped, electromagnets for operating the said levers, one magnet being normally energized and the other normally denergized, a toothed sector movable by the rotation of the signal wheel, a pawl cooperating with the toothed sector, means movable with the sector for preventing the armature lever of the normally denergized electromagnet from moving to stop position before the sector has moved a predetermined distance, and means movable with the sector for controlling the circuit of the normally denergized electromagnet to stop the clockwork.

ll. In a device of the class described, the combination of a clockwork. a signal wheel driven thereby, a wheel connected with the clockwork and having a notched and flanged periphery, armature levers having means for stopping the clockwork, riders on the levers and coperating with the notched and flanged periphery of said wheel, whereby the signal wheel is required to make a complete revolution before the clockwork can be stopped` electromagnets for operating the said levers, one magnet being normally energized and the other normally deiinergized, a toothed sector movable by the rotation of the signal wheel, a pawi coperating with the toothed sector, means movable with the sector for preventing the armature lever of the normally denergized electromagnet from moving to stop position before the sector has moved a predetermined distance, means movable with the sector for controlling the circuit of the normally denergized elcctromagnet to stop the clockwork, and a local signal circuit having means closed substantially (hiring the entire movement of the sector.

l2. In an apparatus of the class described, the combination ot' a signal transmitting circuit controlling Wheel, a clockwork for rotating the wheel, a second wheel movable hv the clockwork for transmitting a tronble call, separate stop means tor the clock work. a normallv energized electroniagnet holding one of the stop means in stopping position. a normally denergized electromagnet for the other stop means, a toothed sector driven by the signal wheel. a pawl cooperating with the toothed sector, means for releasing the pawl by one of the electromagnets, a cam movable with the sector, a.

,gized electromagnet for member actuated by the cam for preventing the second-mentioned wheel from influencing the signal circuit more than once, unless previously re-set to normal, a switch for controlling one of the electromagnets, and means movable with the sector for controlling the said switch after the signal wheel has turned a predetermined number of times.

13. In a system of the class described, the

combination of a signal transmitting circuit, a signal wheel controlling the same, a clockwork for driving the wheel, separate Stop means for the clockwork, a normally energized electromagnet for one of the stop means, a normally denergized electromagnet for the other stop means, a circuit in which the electromagnets are in series relation, alarm devices forming normally open shunts around the normally energized electromagnet, whereby the latter becomes deenergized when an alarm device closes, whereupon the clockwork starts and the other electromagnet becomes energized, and means driven by the clock work for shunting the normally de'e'nergized electromagnet to cause the clockwork to stop when the signal wheel has made apredetermined number of turns.

14. In a system ot' the class described, the combination of a signal transmitting circuit, a signal wheel controlling the same, a c1ockwork for driving the wheel, separate stop means for the clockwork, a normally energized electromagnet for one of the stop means, a normally denergized electroma net for the other stop means, a circuit 1n which the electromagnets are in series relation, alarm devices forming normally open shunts around the normally energized electromagnet, whereby the latter becomes denergized when an alarm device closes, whereupon the clockwork starts and the other electromagnet becomes energized, means driven by the clockwork for shunting the normally dee'nergized electromagnet to cause the clockwork to stop when the signal wheel has made a predetermined mnnber of turns, and a vsignal device in circuit with said electromagnets.

15. In a system of the class described, the combination of a signal transmitting circuit, a signal wheel controlling the same, a clock; Work for driving the wheel, separate stop' means for the clockwork, a normally enel'- one of the stop means, a normally denergized electromagnet for the other stop means, a circuit in which the electromagnetsare in series relation, alarm devices forming normally open shunts around the normally energized elec tromagnet, whereby the latter becomes deenergized when an alarm device closes, whereupon the clockwork starts and the other electromagnet becomes energized, means driven by the clockwork for shunting the normally denergized electromagnet to cause the clockwork to stop when the signal wheel has made a predetermined number of turns, and a local signal circuit normally open and having means whereby the local circuit will be closed while the signal Wheel is transmitting signals.

16. In a device of the class described, the combination of a signal transmitting circuit, a signal -Wheel controlling the same, a motor for rotating the signal Wheel, electrical means for controlling the starting and stopping of the motor, a toothed sector moved a step by each rotation of the signal wheel, and a pawl for holding the sector after each step, said pawl being controlled by the said electrical means to permit the sector to return to normal position, Whenever the electrical means is energized, electric-al means for stopping the motor after the signal wheel has turned a predetermined number of times, and a circuit tor the last electrical means controlled by the sector.

17. ln a device of the class described, the combination of a signal transmitting circuit, a signal wheel controlling ilu` same, a motor for rotating the signal wheel, electrical means for controlling the starting and stopping of the motor, a toothed sector moved a step by each rotation of the signal wheel, and a paw] for holding the sector after each step, said pawl being controlled by the said electrical means to permit the sector to return to normal position, Whenever the electrical means is energized, electrical means for stopping the motor after the signal wheel has turned a predetermined number of times, a circuit for Vthe last electrical means controlled by the sector, and a local signal circuit controlled by the sector.

1S. In a device of the class described, the combination of a signal transmitting circuit, a signal wheel controlling the same. a motor for rotating the signal wheel, electrical means for controlling the starting and stopping of the motor, a toothed sector moved a step by each rotation of the signal Wheel, and a pau'l for holding the sector after each step, said pawl being controlled by the said electrical means to permit the sector to freturn to normal position, whenever the electrical means is energized, electrical means for stopping the motor after the signal wheel has turned a predetermined number of times, a circuit for the last electrical means controlled by the sector, and a device for influencing the signal transmitting circuit in addition to the signal Wheel to indicate a trouble call, and an element actuated by the sector to prevent more than one operation of the said device, unless previously re-set.

19. A unitary self-contained ap aratus for transmitting signal arid trouble calls, comprising` a normally energized and a normally able with the said means, and means denergized electromagnet, the electromagnets being normally in closed circuit, and the second-mentioned electromagnet being normally unintluenced by the normal flow of current through the circuit, a single motor controlled by the electromagnets, and signal and trouble"y call means actuated by the motor.

Q0. A unitary self-contained apparatus for transmitting signal and trouble calls, comprising a normally energized and a normally denergized electromagnet, the electromagnets being normally in closed circuit, and the second-mentioned electromagnet being normally unintluenced by the normal flow of current through the circuit, a single motor controlled by the electromagnets, signal and trouble call means actuated by the motor, and circuit@controlling switch mechanism movable with the said means.

21. A unitary self-contained apparatus for transmitting signal and trouble" calls, comprising a normally energized and a normally denergized electromagnet, a single motor controlled by the electromagnets, signal and trouble call means actuated by the motor, circuit-controlling switch mechanism movfor automatically re-setting the mechanism when the necessity for the trouble or signal call is removed. 1

22. A unitary self-contained apparatus for transmitting signal and troubley calls, coi-1n prising a normally energized and a normally denergized electromagnet, a single motor controlled by the electroniagnets` signal and L"troublel call means actuated by the motor. a` sector movable step by step as the said means is actuated, a paWl engaging the sector, means for releasing the pawl by the energizing ot' one of the electromagnets, and a switch mechanism controlled by the moyenient of the sector.

Q3. A unitary self-contained apparatus for transmitting signal and trouble" calls, comprising a normally energized and a normally dciiucrgized electromagnet` a single 'motor controlled by the electromagnets, signal and trouble"` call means actuated by the motor, a sector movable step by step as the said means is actuated, a pawl engaging the sector, means for releasing the paivl by the energizing of one of the electronmgm-ts. electric switches. means actuated by the sector for controlling the said switches, and means for releasing the sector to permit the same to return to normal position when the electromagncts are in their normal condition.

24. The combination of a normally energized elcctromagnet, a motor controlled by the electromagnets and having sufficient energy to permit operation of the apparatus an indefinite number of times, a plurality of switches, means operated by the motor for means, a plurality affecting the switches, and means for permitting the automatic re-setting ofthe last-mentioned means.

25. An apparatus of the class described, comprising a spring-wound motor, `separate electromagnetic means for controlling the starting and stopping of the motor, a toothed sector, means for moving the same by the motor, a pawl cooperating with the sector and controlled by one of the said means, a plurality of switches, and means driven by the sector to actuate the said switches.

26. An apparatus of the class described, comprising a spring-wound motor, separate electromagnetic means for controlling the starting and stopping of the motor, a toothed sector, means for moving the same by the motor, a pawl coperatin with the sector and controlled by one o the said of switches, means driven by the sector to actuate the said switches, and means for re-setting the sector and lastmentioned means upon the releasing of the pawl from the sector.

27. An apparatus of the class described, comprising a spring-wound motor, separate electromagnetic means for controlling the starting and stopping of the motor, a toothed Sector, means for moving the same by the motor, a pawl coperating with the sector and controlled by one of the said means, a plurality of switches, and a plurality of cams driven by the sector for operating the said switches.

28. An apparatus of the class described, comprising a Vspring-wound motor, separate electromagnetic` means for controlling the starting and stopping of the motor, ar toothed sector, means for moving the same by the motor, a pawl cooperating with the sector and controlled by one of the said means, a plurality of switches, a plurality of cams driven by the sector for operating the said switches, and spring means for returning the cams and sector to normal position when the pawl Vis released from the sector.

29. An apparatus of the class described comprising a normally energized electromagnet, a normally denergized electromagnet, a motor controlled by the electromagnets, a supervisory circuit in which the electromagnets are included, normally open switch means adapted to automatically close under abnormal conditions to cause the deenergizing of the first and the energizing of the second electromagnet, an element movable by the motor, a member controlled by the first electromagnet for holding the element after being moved, spring means for returning the element when the member is released therefrom, and switch means controlled by the movement of the element for influencing the second-mentioned electromagnet to stop the motor as long as the cause setting the apparatus in operation exists.

30. An apparatus of the class described comprising a normally energized electromagnet, a normally denergized electromagnet, a motor controlled by the electromagnets, a supervisory circuit in which the electromagnets are included, normall open switch means adapted to automatica ly close under abnormal conditions to cause the deenergizing of the first and the energizing of the second electromagnet, an element movable by the motor, a member controlled by the first electron'iagnet for holding the element after being moved, spring means for returning the element when the member is released therefrom, switch means controlled by the movement of the element for influencing the second-mentioned magnet to stop the motor as long as the cause setting the apparatus in operation exists, and means movable with the element for normally preventing the second electromagnet from stopping the motor until the element has moved a predetermined distance.

31. The combination of a normally energized electromagnet, a normally de'energized electromagnet, a motor controlled by the electromagnets and having sufiicient energy to permit operation of the`apparatus an indefinite number of' times, a switch for influencing the electromagnets, and means for closing the switch when the motor has operated a predetermined length of time.

32. The combination of' a normally energized electromagnet, a normally denergized electromagnet, a motor controlled by the electromagnets and having sufficient energy to permit operation of' the apparatus an indefinite number of times, a plurality of switches adapted to be operated in a predetermined order, and means operated by the motor for closing the switches.

33. The combination of a normally energized electromagnet, a normally denergized electromagnet, a motor controlled by the electromagncts and having' sufficient energy to permit operation of the apparatus an indefinite number of times, a plurality of switches adapted to be operated in a predetermined order, means operated by the motor for closing the switches. and a device to re-set the said means after the electromagnets are restored to normal conditions.

34. The combination of al normally energized electromagnet, a` normally deiiuerized electromagnet, a motor controlled y the electromagnets and having suflicient energy to permit operation of the apparatus an indefinite number of times, means operated by the motor for transmitting one or moresignal calls and a trouble Call, and automatically re-set means operated by the motor for preventing more than one trouble call from being transmitted un less the electromagnets are restored to normal condition.

35. The combination 0f a supervisory cir cuit including a normally energized electromagnet and a normally denergized electromagnet, a mechanism controlled by the electromagnets, and an alarm device normally forming an open shunt around the normally energized electromagnet and adapted when closed to effect the denergizing of the first and the energizing of the second electromagnet for changing the influence of the magnets on the said mechanism.

3G. The combination of a supervisory circuit including a. normally energized electro-- magnet and a normally denergized electromagnet, a mechanism controlled by the eleclromagnets, an alarm device normally forming an open shunt around the normally energized electromagnet and adapted when closed to effect the denergizing of the first and the energizing oi' the second electromag net for changing the influence of the mag nets on the said mechanism. and means con trolled by the mechanism for stopping the same by neutralizing the ell'ect of the second electromagnet after the apparatus operates a predetermined length of time and it' the alarm device remains closed.

37. The combination of a normally closed supervisory circuit including two electromagnets, one being energized by the normal flow of current and the other being nenergized. a mechanism controlled by the electromagnets, and an alarm device normally forming an open shunt around the normally energized electromagnet and adapted when closed to eifect the denergizing of the first and the energizing of the second electromagnet for changing the influence of the magnets on the said mechanism.

38. The combination of a normally closed supervisory circuit including a source of electric current and a pair of magnets, one magnet being energized and the other unenergized by the normal iiow of current, an alarm device normally forming an open shunt arond the normally energized electromagnet and adapted when closed to eli'ect the denergizing of the first and the energizing of the second electromagnet, and a mechanism controlled by the magnets, one side of the said current source being grounded. whereby the breaking of the circuit at any point or the grounding of the circuit at any point between the ung-rounded side of the said current source and the normally energized electromagnet or the weakenin of the said current source below a services le condition will denergize the normally energized eicctromagnet and remove its influence on the said mechanism.

39. The combination of a normally closed supervisory circuit including a source of electric current and a pair of magnets, one magnet being energized and the other unenergized by the normal flow of current, an alarm device normally forming an open shunt around the normally energized electromagnet and adapted when closed to effect the deenergizing of the first and the energizing of the second electromagnc, a mechanism controlled by the magnets7 one side of the said current source being grounded, whereby the breaking of the circuit at any point or the grounding of the circuit at any point between the ungrounded side of the said current source and the normally energized electromagnet or the weakening of the said current source below serviceable condition will denergize the normali energized electromagnet and remove its influence on the said mechanism, and a signal in the supervisory circuitand unresponsive to the normal flow of current therein but responsive to the flow of current when the alarm device is closed or the circuit is grounded.

40. In a device of the class described, the combination of a signal transmitting circuit, a signal wheel controlling the same, a spring motor having a winding shaft operatively connected with the signal wheel for rotating the same in one direction` a step-by-step device spaced from the motor shaft and acl tuated by the rotation of the said wheel, electrical means for controlling the stopping and starting of the motor, a holding element for the stepbystep device and arranged to be released when the electrical means arrests the motor and adapted when released to permit the step-b v-step device to return to normal position, a supervisory circuit in which the electrical means is included, an alarm device controlling the said circuit. and a switch actuated by the step-by-step device for influencing the supervisory circuit after the signal wheel has rotated a predetermined number of times.

41. In a device of the class described, the combination of a signal transmitting circuit, a signal wheel controlling the same, a motor having a winding shaft operatively connected with the signal wheel for impartn ing rotation thereto, a supervisory circuit. a normally energized and a normally deenergized electromagnet in the said circuit, motor stops controlled by the said magnets, a sector mounted independently of the winding shaft of the motor and actuated with the said signal Wheel, a pawl engaging the sector and'operatively related to the motor stop of the normally energized electromagnet, whereby the paw] is normally releasedfrom the sector, means associated with the stops for preventing movement of the latter until the signal Wheel has made a. complete revolution, means for returning the sector to normal position When the pawl is released, and a switch controlled by the sector when tlie latter has reached the limit of its movement to demagnetize the normally denergized electromagnet to stop the motor.

y 42. In a device of the class described, the combination of a signal transmitting circuit, a Signal wheel oontrollin the same, a. motor having a Winding shat operatively connected with the signal wheel for imparting rotation thereto, a supervisory circuit, a normally energized and a normally denergized electromagnet in the said circuit, motor stops controlled by the said magnets, a sector mounted Aindependently of the winding shaft of the motor and actuated with the said signal Wheel, a pawl engaging the Sector and operatively related to the motor stop of the normally energized electroma net, whereby the pawl is normally released rom the sector, for preventing movement of the latter until the signal wheel has made a complete revolution, means for returning the sector to normal position when the paWl is released, a switch means associated with the stops 25 controlled by the sector when the latter has'30 reached the limit of its movement to demagnetize the normally denergized electromagnet to stop the motor, means for iniuencing the signal transmitting circuit in addition to the signal wheel for indicating a trouble call, and a device movable with the sector for preventing the last-mentioned means from operating more than once unless previously re-set.

JOHN W. WHITE.

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