US2023680A - Signal control mechanism - Google Patents

Description

Dec. 10, 1935. M; GARL 2,023,680

SIGNAL CONTROL MECHANISM Original Filed March 26, 1931 3 Sheets-Sheet 1 M. GARL Dec. 10, 1935.

SIGNAL CONTROL MECHANISM Original Filed March 26, 1951 5 Sheets-Sheet 2 El Lf Dec. l0, 1935. M, GARL SIGNAL CONTROL MECHNISM Original Filed March 26, 1931 3 SheetsSheet 3 Patented Dec. 10, 1935 UNITED STATES SIGNAL CONTROL MECHANISM Manious Garl, deceased, late of Akron, Ohio, by Linnie Garl, executrix, Akron, Ohio, assgnor to Linnie Garl Original application March 26, 1931, Serial No. 525,510, now Patent No. 1,921,615, dated August 9 Claims.

'Ihe present invention relates to .signal control mechanism which is primarily adapted for use in combined police and re alarm systems such as described in my copending application Serial No. 525,510, led March 26, 1931, Patent No. 1,921,615, dated August 8, 1933, of which this case is a division. For a more complete understanding of these systems, reference may be had to the parent case, although it is to be understood that my signal control mechanism is not limited in its use with such combined systems, since its applicability to many types of alarm or signal systems is recognized by me and will be apparent to those skilled in the art.

For the purpose of illustrating and explaining the construction and functions of my signal control mechanism in its embodiment in a signal system, the general system oi my copending case may be briefly described as an alarm system consisting of two or more central stations, or most generally these central stations will consist of a single central station at the lire department headquarters and another central station at the police department headquarters. Each oi these central stations for the purpose of description my be said to maintain outlying stations in the eld which may be widely separated and which may vary in number. These outlying stations consist of the conventional street alarm boxes having housed therein alarm and telephonie instrumentalities adapted to function in separate energized circuits connecting each alarm box with the central stations respectively. Each alarm box is of conventional design and is proided with the usual inner door on which the various instrumentalities, both signal and telephonie, are mounted. The outer door is provided. with a shatterable glass seal adapted to be broken in the usual manner when a fire alarm is to be sent into the re department headquarters. Means is provided for the use of the alarm box as a eld post signal and telephonic station to th-e police department central station or headquarters by simply opening the outer door, the signal and 'telephonie instrumentalities being automatically introduced, upon opening of the outer door, into the police department circuit. Provision is made for temporarily shunting the signal and telephonie instrumentalities out of the fire department circuit to permit the functioning of the lire circuit from other outlying stations to be maintained operable as usual and to prevent reception of the police signal at the nre department headquarters. Means is similarly provided for shunting the signal and tele- Divided and this application July 3, 1933, Serial No. 678,972

phonic instrumentalities out of the police department circuit and introducing them into the fire department circuit when a i'lre alarm is sent into the re department, such means being operable only when the outer door remains closed or when the door operated instrumentalities are manually operated. In order that a general alarm may be sent in successively by the same police officer to both central stations, as for eX- ample when a fire is supposed to be of an incendiary origin, the switch mechanism operated by the outer door is manually controllable so that signal or telephonie communication may be rst sent in to the police department and immediately thereafter to the re department, or Vice versa.

It is an object of the present invention to provide a suitable signal control mechanism, preferably of the rotary disc type, which automatically introduces the signal instrumentalities into the police or fire department circuit, as the case may be, incident to the tripping of the signal mechanism. Provision is also made for automatically shunting out the signal instrumentalities upon completion of the transmission of the signals.

Another object of the invention is to provide a shunt which is so positive in operation that poor or lcose electrical contact is avoided, and When the shunt contact members are closed there is no likelihood of the same becoming opened by accident as by jarring the mechanism.

The invention has for a further object the utilization of a conventional driving and escapement mechanism for the actuation of the signal instrumentalities, which mechanism is tripped for actuation and automatically stopped upon completion oi the signals, in a novel and distinct marmer, the novel construction and arrangement of the control mechanism contributing in a large measure to the eciency and electiveness of the signal system as a whole.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof delined by the appended claims.

In the drawings:-

Fig. l is a diagrammatic view oi the electrical circuits and signal and telephonie instrumentalities of a complete police and fire alarm system, in which my signal control mechanism may be embodied by way of example of one adaptation of the same.

Fig. 2 is a front elevation of the clockwork gear train mechanism with the inner door removed, ,Showing the same in its normal position when the outer door yis shut and when the mechanism is ready to be tripped to send in a re alarm.

Figure 3 is a fragmentary View, similar to Fig. 2, showing the clockwork gear train mechanism in the position occupied when the police alarm lever Vhas been tripped and when the outer door is open to shunt the signal and'telephonic instrumentalities out of the're department circuit and install the same into the police department circuit.

Figure 4 is a fragmentary View similar to Figures2 and 3, showing theclockworkgear'mechanism occupying the proper position after a fire alarm has been sent in to the re department headquarters, with the outer 'door shut and before the clockwork mechanism vhas been reset by the chief oncer of the re patrol.

Figure 5 is a fragmentary side elevation of the arrangement of parts shown in Figure4.

. Figure 6 is a front elevation of the detached inner door panel showing the l*signal andV telephonic instrumentalities mounted thereon.

Figure '7 is a bottom View of the showing in Figure 6.

'Figure '8 isafragmentary front elevation of anV alarm kboxhaving hinged inner and outer door panels Vwith associated signal and telephonie instrumentalities mounted thereon in operative relation.

In all ofthe above described Views, like characters of Areference are employed to designate like tparts throughout.

Referring Anow to Figure 1, unit -I designates -diagrammatically the police department headquarters central station including a police alarm A-relay I`E!,^a telephone unit I I in multiple therewith, and an energizing battery I2, all operatively connected Vin a three wire circuit I3 conln'ected with various outlying stations or field -posts.

lUnit -2 represents diagrammatically a similar y'central'station for the nre department, including are alarrnrelay I4, telephone instrumentalities I5 in 3multiple therewith and an energizing battery-I6, all Aoperatively associated in the circuit 5I1. f'One lof the wires 183 of VVthe three-wire circuits i|3 and I1, maybe termed the fire departlment `line'or circuit, this being the upper wire of the three shown in the .upper extremity of the wiring diagram of Fig. l. As-s'hown, the lower wire III! of the three-wire group is the police ldepar'tmentlinafand the ycenter wire ZIM is the common or -ground wire. It is understood that vthe-relative positions of these wires is immaterial.

Unit 3 vrepresents diagrammatically the ysignal-and telephonic instrumentalities operatively mounted within one of the outlying street alarm =boxes as connected Yin the .police :department cir- Lcuit and including clockwork controlled signal instrumentalities i8, telephonie instrumentalities :I9,.a .s'huntmechanism 2.0, and .za transfer switch v2I for shunting the signal and telephonie instrumenta-lities :out of the police or re department circuits according to whether the outer door for the box is respectively closed oropen.

Unit 4 .represents Vdiagrammatically the same Lor .another .outlying station represented by unit `3, with the signal and telephonie instrumentalities connected in the re department circuit I1, and showing atelephone signal switch 22 adapted "for use'in attracting the attention of the central station operatorpreliminarily to establishing tel- ;ephonic communication with the central station lof the're department.

'Referring now to Figs. '6,"1and` 8, the alarm box is shown at 23. This box is of the conventional type and has hinged thereto as at 24 an inner door panel 25 on which are mounted the signal and telephonie instrumentalities. Hinged to the alarm box 23, as at 26, is an outer door panel 21 having ashatterable window 21', the door being shown in its open position in Fig. 8.

The signal instrumentalities shown at I 8 in units 3 and-bof Fig. 1 and in Fig. '7 are comprised of a clockwork unit 28 secured by means of bolts 29 (see Fig. 8) to the rear of the panel 25. This clockwork unit'comprises an alarm wind and trip lever '39 positioned on the front of the panel 25, anda re alarm trip lever 3| operable by means of a handle 3| and extending forwardly of the panel 25.

'The telephonie instrumentalities I9 are comprised of the usual receiver hook 32, a receiver 33 mounted within a pocket 34 in the front of thejpanel 25, and a transmitter 36 secured to the rear'of the panel 25 and having a mouthpiece on the front side ofthe panel, together with the'usual telephone -switch assembly 31 selectively connected in multiple with the police and fire*- alarm relays yIll and I4, as'clearly shown in unit I of Fig. l.

Gperatively associated with the innerv door 'panel -25 is a transfer switch 2I as disclosed in my Patent No. 1,921,615 of which this case is a ,g2

division for selectively rendering ythe signal and 'telephonie instrumentalities I8 and I9 operable in'the fire department yor police department circuits IB or I1. This switch is operable by a plunger 38 extending outwardly of the front wall f; of the panel 25 for such selective control.

The switch in itsnormal position with the outer` door panel 21 -closed serves to maintain the signal and telephonie Vinstrumentalities in the re deypartml'entcircuits,ibut upon opening of the outer door-panel this switch is automatically operable, by an Yarrangement of parts more fully to be described hereinafter, to exclude these instru- -mentalities from the re Adepartment circuit and install :the same 4in the police .department circuit. The telephone.signal switch 22 is operable by a push pull plunger 39 Aextending forwardly of .the panel 25 to Acause a signal apparatus (not shown) at the `iire department ,headquarters to actuated l'gear train which causes movement of the novel signal control is of lconventional design and may 'be `similarlto that Yshown in the patent lgranted 'to J. and `W. ;Sidall, No. 1,203,420,

dated `October 31, 1916. No claim is made to the noveltyof'this .driving mechanism, the novelty of lthe'clock Vwork unit residingrather in the signal control itself. The clock work unit is shown as comprising .the usual frame including a plate VIII .Journalledin this plate 4I is a shaft 42, corresponding to shaft V23 of Sidall, upon which the wind lever 3!! ismounted and secured. This shaft :'42 vhas applied `.thereto by the spring of the clockwork unitra torque normally urging the same in acounterclockwise direction. The shaft 2 has keyed :thereto .a swing arm 3 having oppositely extending radial portions 44 and 45, the arm 4:3 heilig slightlyilonger than the arm 45. The arm 45`is provided'with an abutment surface 46 adapted to engage the `pin 41 on a sliding plate 48.

:The plate f48 is `provided with a slot 49 through which there extends a screw 50 which is threadedly receivable in the plate 4I. The plate 48 is of elongated shape and one end thereof has a roller 5I mounted thereon, which roller is formed of insulating material. Secured to a post 52 and electrically connected thereto, is a conducting leaf spring 53 having one end thereof bearing against lthe roller 5i as at 54 and normally urging the roller and the elongated plate 48, to which it is attached, downwardly in a direction opposed to the `direction of movement of the plate as urged by the engagement surface 46 bearing against the pin 41. In the normal position of the arm 43 the abutment surface 46 bears against the pin 41 and holds the plate 48 in the position shown in Figure 2 with the leaf spring 53 under tension. A bar 54 formed of suitable insulating material is secured by insulated bolts 55 to the plate 4l. This bar 54 has a contact plate 56 secured thereto, which plate is connected through an electrical connection in the form of a copper strip 51 to a contact post 58, (Fig. 2 and units 3 and 4 of Fig. l), electrically connected to one contact 59 of the circuit breaker mechanism 60. The contact post 58 is also electrically connected to the transfer switch 2l in a manner more fully described in my aforementioned patent. The post 52 which has the leaf spring 53 secured thereto is electrically connected to the movable arm 6| of the telephone receiver hook 32. This post 52 is also electrically connected to the other contact 62 of the circuit breaker mechanism BD. (See unit 3, Fig. l.) In the normal position of the mechanism the roller 5| maintains the shunt, comprising of the contact plate 55 and theleaf spring 53, closed in order to shunt the signal mechanism out of the circuit. Upon tripping of the circuit breaker mechanism in a manner to be more fully described, the shunt is opened to enter the signal mechanism into the circuit for operative use while the code signal is being given in a conventional manner. The shunt is operable in this manner to exclude or include the signal mechanism in this circuit regardless of whether the signal mechanism is tripped for signalling in either the police department or the lire department circuit.

Referring again to Figure 2, wherein the normal position of the mechanism is shown with the outer door 21 closed and with the trip or swing arm 43 bearing against the pin 41, and with the shunt closed to exclude thel signal mechanism from the alarm circuit, opening of the door 21 will cause the transfer switch 2l to shunt the re ydepartment circuit completely out of the box and introduce the police department circuit to the various signal and telephonic devices thus far described within the box. By turning the wind lever 34 in a clockwise direction, as shown in Figure 8, the shaft 42 will be turned against the torque applied to it by the clock work spring mechanism and further wind the spring. This will cause the swing arm 43 to be turned in the direction of the arrow shown in Fig. 2, the limit of this turning movement being shown in Fig. 3 with the swing arm 43 bearing against the stop pin 63. Upon releasing of the wind lever 3G the escapement mechanism 54 will be set into action through the usual ratchet arrangement and the swing arm 43 will be rotated in a counter-clockwise direction. The turning of the swing arm 43 in a clockwise direction will cause the sliding plate 48 to be moved downwardly by the action of the contact spring 53 to open the shunt 2) and introduce the signal mechanism into the police department circuit maintained within the box by virtue of the outer door 21 being opened. Due to the turning of the swing arm 43 under the action of the clock work spring working on the shaft 42, and due to the operation of the escapement mechanism, the signal mechanism 60 (shown in Fig. 6) will be set into motion, effecting transmission of a suitable code signal, as for example, the box number, to the police department. By suitable prearrangement, this signal may indicate to the central station operator that the telephone should be answered.

It is understood that during this operation the outer door of the field box is open, and accordingly, the telephone instrumentalities have been introduced into the police circuit by the opening of the door operated shunt 90, 9|, 92, incident to opening the outer door. Therefore, upon completion of the code signal and the automatic shunting out of the signal instrumentalithis code lever 6E will cause opening and closing f3 of the contact members 59 and 62 (see unit 3, Fig. 1) to carry the signal through the police department circuit I3 to the police department headquarters.

It will be seen, therefore, that when the outer door is open and when the wind lever 30 is rotated until the swing arm 43 engages the stop 63 and is then released the signal mechanism is operated in the police department circuit. The gearing of the disc 61 in the train of gears comprising the clock work mechanism is such that substantially one revolution of the disc will take place while the shaft 42 rotates throughout an arc suicient to carry it from the position shown in Fig. 3 to the position shown in Fig. 2. When the shaft has completed this rotation throughout the arc just specified, the radial arm 45 engages the pin 41, thereby closing the shunt 2G and throwing the signal mechanism out of the police circuit, into which it was previously introduced when tripped and during functioning of the signal apparatus in the police circuit.

It has been seen how the signalling mechanism E8 functions to cause a signal to be sent into police headquarters when the outer door is opened and when the wind arm 3G is operated. It has also been seen how the shunt 2D operates to permit this signal mechanism tol function for signal purposes and later to exclude the signal mechanism after the signalling has ceased, and it will now be described how the trip handle 3l may be employed to send a signal caused by the signal mechanism I8 through the fire department circuit to the lire department headqumters. With the transfer switch 2i so positioned that the re department circuit is introduced into the box and the various signal and telep-honic instrumentalities adapted for use in the re department circuit, means is provided whereby movement of the trip arm handle 3l' in an arcuate slot 88 formed in the inner door 25 will release the swing arm 43 for further rotational movement throughout a wider arc than is permitted when the trip arm 3G is thrown. Thus the escapement mechanism 54, released upon `latch member 13, (see Figs. 2, 3, 4, vand 5).

movement of the swing farmi43, will' permit `the circuit breaker disc V61 to make several `revolutions to send in several series of 'signals to the fire department headquarters. To accomplish this the trip lever 3| is provided vwith a bifi cated end 69 and is pivoted at 10 to the -inside of the inner door ,panel 25. The bifurcations of theV end 69 straddle the pin 41 and movement of the lever 3| on its pivotalV axisrand .througha small angle commensurate with movement of the trip handle 3| lin the slot '68 willrshift -the pin 41 (see Fig. 2) from the short arm 45 ofthe swing arm 43, thereby leaving the swing arm free to rotate runder the .action of the coil spring of the clock work mechanism as governed by the escapementl mechanism 64. The long arm 43 may then swing in a counter-clockwise direction from the position shown in Fig. 2 to the position shown in Fig. 4. During the movement of .the swing arm 43 the escapement mechanism 64 is in operation. A locking means is provided for the escapement mechanism in the form of a pivoted This latch member is substantially triangular in-shape and is provided with an offset flange 14. A pin -extends .completely through the latch Vmember adjacent one corner and a leaf spring 16 secured to a post 11 has a bearing surface 18 thereon normally resting on the pin 15 in the position shownA in Fig. 3. 'Ihe long end 44 of the swing arm43 is :provided with a projection 19 (see Fig. 4) which engages the offset portion 14 of the l'latch Vmember 13 upon vcompletion of the stroke of the swing arm when tripped by the trip lever handle 3|. The -play afforded by the slot 49 in the sliding plate 48 permits the projection .19 to engage the Yoffset portion 14 and by a bell crank lever :action throw the pin 15 in the latch member 1'3 toward the escapement mechanism `64, (see Fig. 5), to stop the escapement of the clock work mechanism and fto stop movement of the 1breaker disc thereby shutting oif the signal. As the long end'44 of the swing arm A43 engages the pin 41 at the end vof its stroke, the sliding plate 48 is carried upwardly, together with the roller '5I thereon, and the shunt 20 is closed to shunt the signal lmechanism, which has completed its function, from the circuit. In unit 4 of Fig, l the signal switch 80 is shown as being in 4series in the fire department circuit. This switch is of the push pull type and upon outward pulling of the plunger 39 the circuit is .broken and a signal device at the fire Vdepartment headquarters is operated. This signal device may be of any suitable type, as a bell, light, or the like, and upon functioning'of the same the operator at the re ldepartment headquarters is notified f that 'heis to pick up the telephone forcornmunication.

Now, let it be assumed that thecombined syscuit, the code signal being automatically given in a conventional manner incident to the release .of'arm 45 from engagement with abutment 'nin 4.1. Itis understood that the transferV switch 2| establishes the proper circuit, which in this case vis 'the 'fl-re department circuit, due to the fact that the outer door of the field box is closed, and the transfer switch is thereby held by the door to establish this circuit, as diagrammati- .5 cally shown in unit 4 of Fig. 1. Tracing the circuit over which the'signal impulses flow from the code breaker contacts 59, 62, and starting from post 58 of unit 4, the circuit is as follows: post 58, Wire |00, lefthand contact finger 84 of 10 transfer switch 2| of unit 4, left hand contact bar 83, lefthand contact finger 8I, wire IOI, thru telephone call switch 22, wire |02, over fire department line |03 to righthand contact'nger v8| of transfer switch 2| of unit 3, contact bar 15 82 of `unit 3, lefthand contact finger 8| of unit A3, backY to line |03 and on to re department relay I4, `thru relay I4 to battery I6, and from battery I6 back over the ground or common wire |04 to wire |05 connected thereto at the extreme 2O right end of the gure, righthand contact finger 8| of transfer switch 2| of unit 4, righthand contact bar 83, righthand contact finger 84, wire |06, thru door shunt 9|), 9|, 92 (the door, and consequently the shunt, being closed) to contact 62, interrupter contact 59, back to post 58 from which the tracing started. In tracing this circuit from unit 4, and assuming unit 3 is another box some distance away, transfer switch 2| of unit 3 and door operated shunt 90, 9|, 92 30 of this unit would normally bein the same position `as in unit 4, instead of as shown in unit 3, if the outer door of unit 3 is closed, as it normally is. In that event, fire department line |03 can be traced thru from |02 of unit 4, thru 35 unit 3 to relay I 4 in an obvious manner. As shown in unit 3, however, fingers 8| of transfer switch 2| of this unit are connected by bar 82, shortening the circuit somewhat, as in the case where transferswitch 2I of unit 3 happens to be in a 40 position for use of this box for communicating with the police department.

VHaving shown the circuit over which the code signals are transmitted to the fire department, and bearing in mind that the operation of the trip handle 3|' permits a series of complete signals to be sent, say, for example, several repetitions of the code number of the box, completion of the signals vcauses automatic locking of the drive mechanism for the signal mechanism and also closing of shunt 20 (see Fig. 4), thereby excluding the signal instrumentalities from the circuit until the drive mechanism is rewound and tripped again. 'When the fire company arrives at the scene of the re, a man may be detailed to replace the glass window 21 and rewind the drive mechanism, vthe latter being accomplished by opening 'the outer door of the eld'box to expose the winding varm 30 and rotating this arm 30 in a clockwise direction to the position shown in Fig. 2, ,in which position the parts are conditioned for immediate or subsequent sending of alarms. If this man, or one of the re company, wishes to communicate with the fire department, -he may 'do vso by opening the outer doorv of the 65 field box, if it is not already open, and manually holding the transfer switch 2| in the position it normally occupies when the door is closed, whereupon, pulling out telephone call switch button 22 momentarily will attract the attention of 70 the fire department central station operator. Then by lifting the receiver off the hook, he may talk with the operator. Under these conditions, it will be remembered that opening the outerdoor ofthe field box opens shunt 90, 9|, 92,'- so that 75 the telephone instrumentalities are automatically introduced into the circuit, which is the same circuit as that described in detail for the transmission of the code signals. In other words, the telephone is substituted for the signal instrumentalities, the latter having been automatically shunted out upon completion of the code signals, and for this reason, the circuit will not be traced in detail again. It will be noted that the telephone instrumentalities of the fire department central station are connected in multiple with the relay I4, as shown in unit 2 of Fig. l, so that in the case of telephone communication these instrumentalities function in place of relay Il, the operation of which was fully described in specifically describing the complete circuit.

Now let it be assumed that the system is normal and a police oicer goes to one of the many boxes of the system for the purpose of communicating with police headquarters. 'Io accomplish this, he opens the outer door of the field box, thereby causing the transfer switch 2| to automatically assume a position establishing the circuit to the police department central station, as shown in unit 3 of Fig. 1. Opening the door also automatically opens the shunt 90, 9|, 92, so that the telephone instrumentalities are conditioned for use in this circuit. To get the attention of the police central station operator, the oicer rotates arm 3D of the signal control mechanism from the position of Fig. 2 to the position of Fig. 8. This opens shunt 20 and introduces the signal instrumentalities in the circuit. When arm 38 is released after being moved to the position of Fig. 8, it returns to the position of Fig. 2, thereby transmitting a code signal to the police department central station, just as in the case of the fire code signal previously described, although in the present instance, the signal is not repeated as in the case where trip handle 3| is shifted for sending the signals to the fire department. In

impulses pass over wire |08 to the lefthand conl tact finger 84 of transfer switch 2| of unit 3, lefthand contact bar 83, lefthand contact finger 85, wire |20, to police department line Illl, police department relay I0, thru the relay to battery I2, from battery I2 to common or ground wire |94, over wire |04 to wire |2| connected thereto at the extreme right of the diagrammatic view, wire |2| to righthand contact linger 85 of transfer switch 2| of unit 4, contact bar 86 of unit 4, lefthand Contact finger 85 of unit 4, wire |22, line IIB, righthand contact 85 of transfer switch 2| of unit 3, righthand contact bar 83 of unit 3, righthand contact finger 84, wire |23, lower contact point associated with receiver hook 6| of unit 3, receiver hook, to contact 62 of the signal mechanism, interrupter contact 59, and back to post 58 from which the tracing was started. Upon completion of the code signal, shunt 28 of unit 3 automatically closes and the signal instrumentalities are shunted out of the circuit. 'Ihe police officer at the box then lifts the receiver off of the hook and verbal communication may be had with the central station operator.

If the police oicer wishes to communicate with the lire department central station, he may do so by following the procedure previously described in conjunction with the fire department circuit; that is, by holding in the transfer switch 2| manually, momentarily pulling out the telephone call switch 22 to attract the attention of the re department central station operator, and then lifting the receiver off of the hook. It is notable that in the case of the fire department signal, the signal instrumentalities are not used for attracting the operators attention as in the case of the police department central station operator. This is because it is desirable to arrange the mechanism so that Whenever a code signal is sent over the fire department circuit, it indicates a condition of emergency, additional signal apparatus being employed under control of the telephone call switch 22 for the purpose of indicating desire for telephone conversation over the re department circuit. For the police department circuit, a suitable system of calls can be worked out to convey certain information to headquarters without Vusing the telephone. For example, by operating lever 38 from the position of Fig. 2 to Fig. 3 position, twice in succession, the succession of code signals may indicate that the ofcer needs help and does not care to ask for l it over the telephone for certain reasons. Operating the lever 30 three or four times in succession may denote a condition of extreme emergency, such as a riot, etc. Similarly, the fireman may communicate with the police department central station by following the procedure above described for the police department circuit.

Accordingly, it will be understood that the combined system is extremely flexible and affords protection far superior to that possible with systems heretofore known.

The operation of the control mechanism and associated system will be apparent from the foregoing description, inasmuch as the various elements, units and combinations of units have been described both as to their structure and as to their operation singly and in combination with each other where the occasion required.

The invention is not to be limited to the exact arrangement of parts shown in the accompanying drawings and described in the specification, as various changes in the detail of construction may be resorted to without departing from the spirit of the invention. Only insofar as the invention has been particularly pointed out in the accompanying claims is the same to be limited.

Having thus described this invention, what is claimed as new and desired to secure by Letters Patent in the United States, isf- 1. In a clock work mechanism for circuit breakers of the rotatable disc type, a swing arm including a short radial portion anda long radial portion operatively geared to the rotatable disc, a movable limit stop normally in engagement with said short radial portion of the swing arm, a second limit stop normally out of engagement with said swing arm, means for manually rotating said swing arm and for winding the clock work mechanism to an extent limited by engagement of the swing arm with the second limit stop but adapted upon manual release thereof to permit the short radial portion of the swing arm to rotate into engagement with the movable limit stop, and manual means for tripping the movable limit stop out of engagement with the swing arm to permit added' rotation. of the swing arm, said movable limit stop after theiactionof said tripping means being adapted to be engagedby the long radial portion of the swing arm after a predetermined rotation of the latter.V

2'. In a clockwork mechanism for circuit breakers of the rotatable disc type, a swing arm including a short radial portion and a long radial portion operatively geared to the rotatable disc, a movable limit stop normally in engagement with said short radial portion of the swing arm, a second limit stop. normally out of engagement with said swing arm, means for manually rotating said swing arm. and for winding the clockwork mechanism to` an extent limited by engagement of the swing arm with the second limit stop but adapted upon` manual release thereof to'. permit. the short radial portion ofthe swing arml to rotate into engagement with the movable liinit stop, Yand manual means for tripping the movable limit stop out of engagement with the swing arm to permit added rotation ofthe swing arm, said movablelimit stop after the action of said tripping means being adapted to` be engaged bythe long radial portion of the swing arm'and moved therewith for a predetermined rotationV of the latter, andan electrical shunt mechanism operably associated with said tripping means for shunting the circuit breaking mechanism outof the circuitv incident to the last mentioned movement of the movable limit stop.

3 .A Signal control mechanism of the class describedcomprising a clockworkv mechanism, an arm mounted for rotation by said clockwork mechanism, a stationary shunt contact member, a movable shunt contactA member including a resilient metallic strip xed at one end with its free end--engageablevwith` but normallyrspaced from said stationary contact member, a slidable of said slidable member inthe opposite direction whereby to force said movable Contactv member into engagement with ysaid stationary contact member. Y

4. Signal control mechanism of the class described, comprising a spring operated clockwork mechanism including a drive shaft Vnormally urged for rotation in one directionby the spring, an arm fixed to said shaft for rotation therewith, a limit stop normally positioned in the path of rotation of said arm, said limit stop being movably mounted to afford a slight movement of the same incident to engagement of the said rotatable arm therewith, a pair of shunt Contact members cooperating with said limit stop for closing said contact members incident to movement of said limit stop.V by the rotatable arm as aforesaid, and a wind lever fixed to the drive shaft of said clockwork mechanismand swingable in a direction opposite to the normal urging of the drive shaft and rotatable arm by the clockwork spring, the swinging of said wind lever as aforesaid withdrawing said rotatable arm from' said limit stop to permit opening of said shunt contact members and setting said mechanism for. operation to subsequently close rsaid contact members incident vto engagement of said rotatable arm with saidlimit stop. Y Y

5. Signal control mechanism of the class described', comprising a spring operated' clockwork mechanism, a drive shaft normally urged for' rotation in one direction by the spring, a swing arm xed to said shaft forrotation therewith and including relatively long and short radial arms, a limit stop normally positioned in the path of movement ofone of said radial arms, said limit stop being movably mounted to aiford a slight movement of the same incident to engagement ofA one of said radial arms therewith, a pair of shunt contact members cooperating with said limit stop for closingv said contact members incident to movement of said limit stopY by said radial arm as aforesaid, setting. means Vfor said limit stop affording a selective engagement with the long and short radial arms forV selectively controlling the degreey of'rotation of Vsaid drive shaft, and a wind lever xed to the drive shaft of said clockwork mechanism and'swingable in a direction', opposite tothe normal urging of said drive'shaft and radial arms by the spring, the swingingV of said wind' lever as aforesaid withdrawing the respective radial arm g from said limit stop to permit opening of said shunt contactv members and setting said mechanism for operation togsubsequently close said contact members incident to engagement of one of said radial arms with said limit stop.

6. Signal' control mechanism of thel class4 described, comprising a spring operatedv clockwork mechanism, a drive, shaft normally urged for rotation in one direction by the spring, a swing arm xed to said shaft for rotation therewith and includingV relatively long and short radial arms, a limit stop normally positioned in the path of movement of one of said radial arms, saidV limit stop being movablymounted to afford a slight movement of the same incident to engagement of one of said radial arms therewith, a pair of shunt contact members cooperating with said limit stop for closing said., contact members incidentwto movement of said limit stop by said radial arm asaforesaid,` setting means for said limit stop affording a selective engagement with the long andjshort radial arms for selectively controlling the degree of'rotation of the drive shaft, a wind lever Vfixed to the drive shaft of said clockwork mechanism and swingable ina direction opposite to the normalA urging,V of said drive shaft and radial arms by the spring, the swinging of said wind lever as aforesaid withdrawing the respective radial arm from said limit stop to permit opening of said shunt contactk members and setting said y mechanism foroperation to subsequently close said contact members incidentto engagement of one of said radial armsr'with said limit stop, and locking means actuated by one of said radial arms for rendering said clockwork mechanismv inoperative upon closing of said shunt contact members.

7. In a signal control mechanism of the class described, including separable signal1 contacts, a clockwork mechanism, circuit breaker mechanism` including a code wheel operable4 by said clockwork mechanism 'and coacting with the signal contacts for making and breaking. the signal contacts tov transmit a` signal, andtrip; means for normally preventing signal transmission operation of the aforementioned mechanisms,` but adapted to be tripped to effect signal transmission, 'a shunt switch associated in multiple relationfwith; saidY signal contacts, and. comprising a stationarycontact and a movabley contact engageable with said stationary contact, said lastmentioned contacts being self-opening, and means for forcibly closing said shunt switch contacts by the power of the clockwork mechanism, said last-mentioned means being effective to maintain said shunt switch contacts in closed engagement with each other Whenever the signal contacts are inactive.

8. In a signal control mechanism of the class described, including separable signal contacts, a clockwork mechanism, circuit breaker mechanism including a code wheel operable by said clockwork mechanism and ccacting with the signal contacts for making and breaking the signal contacts to transmit a signal, and trip means for normally preventing signal transmission operation of the aforementioned mechanisms, but adapted to be tripped to effect signal transmission, a shunt switch associated in multiple relation with said signal contacts, and comprising a stationary contact and a movable contact engageable with said stationary contacts, said last-mentioned contacts being self-opening, and means for forcibly closing said shunt switch contacts by the power of the clockwork mechanism, said last-mentioned means being effective to maintain said shunt switch contacts in closed engagement with each other whenever the signal contacts are inactive, and said last-mentioned means being rendered ineffective, so as to permit the shunt contacts to open, incident to actuation of said trip means to eiect signal transmission. 5

9. In a clockwork mechanism for circuit breakers of the rotatable disc type, a swing arm including a short radial portion and a long radial portion operatively geared to the rotatable disc, a movable limit stop normally in engagement with 10 said short radial portion of the swing arm, means for manually rotating said swing arm and for winding the clockwork mechanism, and said means being adapted upon manual release thereof to permit the short radial portion of the swing 15 arm to rotate into engagement with the movable limit stop, and manual means for tripping the movable limit stop out of engagement with the swing arm to permit added rotation of the swing arm, said movable limit stop, after the actuation 20 of said trip means, being adapted to be engaged by the long radial portion of the swing arm after a predetermined rotation of the latter.

LINNIE GARL, Eecutri of M amous Garl, Deceased.

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