US1595472A - Telegraph apparatus - Google Patents

Description

Aug. 10 1926. 1,595,472

7 H. L. KRUM TELEGRAPH APPARATUS Fil ed Nov. 7, 1923 Sheets-Sheet 1 Aug. 10 ,1926. 1,595,472 H. L. KRUM TELEGRAPH APPARATUS Filed Nov- 7, 1923 4 Sheets-Sheet 2 MN M HM Nu;

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H. L. KRuM TELEGRAPH APPARATUS Filed Nov. 7, 1923 4 Sheets-Sheet 5 iv/677107"! Howard L. Mum.

Aug. 10,1926. 1,595,412 H. L. KRUM TELEGRAPH APPARATUS Filed N v- 1925 4 Sheets-Sheet 4 Patented Aug. 10,. 1926.

UNITED STA TES PATENT OFFICE.

HOWARD L. KRUM, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO MQRKRUMKLEINSCHMIDT CORPORATIQN, OF CHICAGO, ILLINOIS, A .CORPORA- 'IION OF DELAWARE.

TELEGRAPH nrrnzenrus.

Application filedli'ovember .7, 1923. Serial No. 673,287.

The invention relates to telegraphs 17. A bail 18 pivoted on the forward eX- adapted for use with systems in which the. signals comprise permutations of two different line conditions extending through a definite number of time intervals or units, the selecting units ofseach signal being preceded by a uniform "starting interval or unit, and the signals being separated by intervals in which the line is restbred to normal condition. The invention seeks to provide improved transmitting and receiving distributers for systems of this sort, to: gether with an improved key-board for controlling the transmitting distributer, distributers and key-board being preferably combined in a single unit. e y The invention consists in the features of improvement hereinafter set forth, illus trated in the preferred form iii the accompanying drawings and more particularly pointed outin the appended claims.

. line 7- 7 of Fig. 1;

In the drawings: Fig] 1 is a plan View 0 paratus;

Fig. 2 is a transverse section on the line 2-2 of Fig. 1

Fig. 3 is a detai of Fig. 1; 1

Fig. 4 is .a front to rear section on line 44 of Fig. 1; i Fig. 5 is a detail longitudinal section on the line 5'5 of 1; Fig. 6 shows, outline cross sections of the receiver cam;

Fig. 7 is a f the improved ap- 1 section on the line 3- -3 frontto rear section on the N Fig. 8 is'a detail longitudinal section of the transmitter'cam taken on the line 8-8 of Fig. 1; J

Fig. Qshows outline crosssections of different portions of the transmitter cam; and

Fig. 10 is a diagram of the circuit connection's.

In its preferred embodiment the apparatus has a hollow cast metal base 'orframe 10 provided with a front extension 11 and a rear extension 12. Key levers 13 arranged.

within 'the upper portion of the basef frame have their rear ends in-engagement .with a common pivot rod 14 carried by lugs 15.

The forward portion of the key levers extend through the slots of a c'ombbar 16 and have upturned front ends carrying keys "hand position b its opposite leftand position by the others. In this way the keys serve to set thesebars .in different combinations.

the rollers 23 are mounted. Each permutation bar is free to move longitudinally toi.

either one of two positions and each bar has cam lugs 25 having oppositely inclined faces, one such face being .provided on each I bar for each of the key levers, so that each bar is adapted to be moved to its rightsome of the keys and'to At its right-hand end each permutatioi bar is provided with a notch in its upper edge which engages the rounded lower end of a corresponding selecting finger. The five selecting fingers 26 extend upwardly through an'opening in the base frame and are mount-ed. upon a common pivotal support 27 arranged between uprights 29. The fingers 26 control a set of switch shifters in the form of bell cranks 30 mounted upon a horizontal pivot shaft 31 carried by uprights 29. Each selecting finger 26 has a hooked lug 32 at its upper end which, as the associated permutation bar is shifted, is moved into and out of position above the end of the horizontal arm of the associated switch shifter. The fingers 26 and bell cranks 30 are held in proper positiorf by spacing washers on the sup orts 27 and 31, and preferably also, a con'ib bar 32 1s rovided for the horizontal arms of the bel cranks or switch shifters-30.

There is provided, however, an additional or sixth switchshifter 307 which is not controlled by one of the selectin fingers.

Each bell crank or switch s ifter hasa hook 33 at its upper end which engages the insulated-upper end of a spring contact zontal arms of the switch shifters or controllers 30. The cam 38 is provided with a helical series of slots 1, 2, 3, 4, 5 and 6, which, as the cam is rotated, successively through the medium of the friction discs or washers 42 and 43.

The selecting fingers are provided at their upper ends with upwardly projecting lugs 63 having beveled upper edges which cooperate with a beveled edge rib on a locking bail 64. The latter is pivotally mounted on-the uprights 29 and a spring 69 tends to depress the lock bar and to hold a roller 70 thereon in engagement with the reduced portion of the transmitter cam. A lug 71 on the cam engages. the roller 70 in the zero or normal arrested osition of the transmitter eam, and thus olds the lock bar 64 in raised position. Shortly after the cam pass over the lugs 37 of the switch controlstarts the spring 69 depresses the lock bar over one of the lugs the associatedswitc contacts are closed provided the horizonta arm of the switch controller is not held down by thecorresponding selecting finger.

The shaft 39 (see Figs. 1 and 8) is journaled at its rear end in a bracket 40 and at its forward end in a bushing 41 carried by the front upright 29. a The cam 38. is loose on the shaft 39 but a flange at one end lers. As the corresponding recess passeq and a recess at the other, are engaged by friction washers 42 and 43 which in turn are engaged by. discs 44 and 45. Disc 45 is pinned to the shaft and disc 44 is keyed to it, being pressed longitudinally of the shaft by a spring 46 coiled about the shaft and extending between the disc and a collar 47 adjustably fixed on the shaft. A hub 48 fixed to the rear end of the shaft has a gear 49 adjustably fixed thereto by' a screw 50 and this gear is connected by a pair of intermediate idle gears 51 with a gear 52 on a shaft 53. Shaft 53 isprovided with a worm wheel 54 which meshes with a worm 55 on,,the shaft ofa small electric motor 56. The latter is mounted on the base 10 and is provided with a suitable governor for maintaining its speed uniform, the governor be= ing provided with suitable means by Whichthe speed of the motor may be adjusted.

The transmitter cam is normally held against movement with the shaft 39 by a stop arm or lever 57 (see Figs. 2 and 7). This stop arm is pivotally mounted between its ends, is vertically disposed and its-upper end is arranged to engage a shoulder 58 on the forward end of the transmitter cam, such upper end beingpressed toward the forward end of the cam by a spring 59. The lower end of the stop arm extends downwardly betweentwo of the keys and carries an adjustable screw 60 which is arranged-to be engaged by a lug 61 on a bail 62. The latter is pivotally mounted at its ends and is shifted by'any one of the key levers when the latter is depressed to set the permutation bars 21 and selecting fingers 26 to thereby shift the stop arm 57, so that the cam shaft is; then rotated by the s aft 39 and holds the selecting fingers 26 and permutation bars in set position and since each bar has an inclined face cooperating with each of the key levers, none of the keys ex- I cept the'ones depressed can be operated until the lock bar is raised.

The receiver cam 72 on the shaft 53 and the associated switch contacts and controllers are similar in construction to those shown and described in connection with the transmitter cam, but the switch controllers of the receiver are uniformly operated in order as the re'eiver cam rotates and are not variably controlled by selecting fingers. The receiver cam (see Fig. 5) has a flange at one end on which a stop cam 73 is adjustably se'cured by a screw 74, the latter extending through a slot in the flange of the cam. The stop cam has circular periphery recessed at one portion and forming a shoulder'75, which is arranged to be engaged by the hooked upper 6nd of a stop arm 76. The latter is mounted upon the frame of a starting magnet 77 and carries the armature of the magnet, a spring 78 serving to hold the stop arm in operative position when the magnet is de-energized. Fig. 10 is a'diagram of the electrical connections. Preferably, as shown, the transmitter contact arms 35 are connected together and toa battery. The transmitter spring contact arms 34 are connected together and either directly. to the line as shown or,.if desired, to the coil of a transmitting. relay; The contacts controlled by the receiver cam are interposed in a local circuit, the receiver contacts 35 being connected respectively to the five selecting magnets;.79 and the socalled sixth pulse or operating magnet 80 of the receiving printer. The receiver contacts 34 are connected together and to the normally engaged contact 81 of aline relay 82. The receiver start magnet is connected to the normally disengaged contact 83 of the relay and the relay tongue is connected, to battery so that the start magnet 77 is energized whenever the normal condition of the line is changed.

As indicated by dotted lines in Fig. 9. the

periphery of the transmitter cam is divided into seven sections, S, 1, 2, 3, 4, 5, and I. Preferably the sections are uniform except that the section I is somewhat greater than the other sections. This section of the cam is in its operative position in the normal arrested or zero position of the cam and thus cooperates with the switch controller 30 to engage'the corresponding pair of contacts and normally hold the line closed. As the cam rotates the switch controller 30 will be invariably shifted as the section S of the cam passes through the operating position and thereafter the other switch controllers 'Will be variably operated in accordance with the setting of the permutation bars to close or hold open the other pairs of contacts during the five selecting intervals of the signals. At the end of the signal and before the cam is arrested, the switch controller 30 will invariably restore the line to normal condition as the section I of the cam is moved to operating position.

The lug 71 releases the lock bar 64 before the transmitter cam is arrested, so that if the keys are rapidly operated the transmitter' cam can be continuously rotated to impart successive signals to the line, but even under such conditions the signals will be separated by intervals of normal line condition which persist as the section I of the cam member passes through the operative position, so that ample opportunity is afforded the cams of the receiver to reach its normal or zero position at the end of each signal and before the starting condition of the succeeding signal is imparted to the line. If the transmitter contacts are directly connected 'to the line the latter is normally closed, the starting interval is one of nocurrent and the selecting signals of permutations of current and no-current intervals. By employing the transmitting relay two different line conditions may be currents of opposite polarity. It should also be noted that the ends of the recesses of the transmitter cam overlap to such an extent that the successive intervals of the signals follow one another without intermediate spaces.

The receiving line relays at the different stations vibrate their tongues in response to the conditions imparted to the line by a transmitter and with the circuit arranged as shown will respond to the conditions imparted to the lines by transmitters located at one or more distant stations, and also imparted to the-line by the local transmitter to form a home record. During the initial starting interval of each signal, the normal line condition is changed and the armature of the line relay engages its contact 83 and closes the circuit of the starting magnet 77. Thereupon the receiver cam 72 is rotated andit cooperates with its switch controllers to successively close the five pairs of con tacts 34 and 35 during the successiye selecting signal intervals so that the set of selecting magnet 79 is successively connected to the contact 81 of the line relay and is operated in accordance with the selecting signal intervals. As the relay armature is shifted during the selecting signal intervals the circuit of the start magnet 77 is opened and closed but at such times the high portion of the stop cam 73 passes in front of the nose on the upper end of thestop arm 76, so that the vibrations of the stop arm are very slight. But during the spacing interval at the end of each signal, the relay armature will engage its contact 81 and the nose of the stop arm 76 will pass into the recess of the cam 73 and engage the shoulder 75 to arrest the receiver cam. The receiver cams are driven at a greater angular speed than the transmitter cams. For this purpose the connecting gears 49, 51 and 52 between the drive shafts for the transmittin and receiving cams are so proportioned t at the shaft 53 is driven slightly faster than the shaft 39, for example in the ratio of 13 to 12, and the governors of the motors of the instruments at different stations are set to run at the same or substantially the same speed. Then to insure that the receiver cam will pass through its five selecting operative positions during the midport1ons of the selecting intervals of the signals, the receiver cam recesses 1, 2, 3, 4 and 5, are angularly spacer farther, apart than the corresponding recesses of the transmitter cam in correspondence with the speed ratio of their drive shafts, and these receiver cam recesses and the lugs 37 on the associated switch controllers are so proportioned that the different operating positions of the receiver cam are angularly considerably shorter than the corresponding operation positions of the transmitter cam, and the operating positions of the receiver cam do not, like those of the transmitter cam, overlap. With this arrangement, by properly adjusting the receiver cam, the line relay will shift its armature while all of the pairs of receiver contacts 34 and 35 are held open, and the selective operation of the receiving printer will be properly affected, even though the motor speeds and other conditions at different connected stations may vary. By means of the screw 74the receiver cam is adjusted relatively to its stop cam 73 to compensate for variations in its own starting operation and so that it will pass through its first selecting operating position during the first selecting interval of each signal.

With the arrangement shown, the transmitter and receiver distributers, their operating'motor and the transmitter controlling key board are conveniently arranged upon a common base, the rear extension 12 of which is provided with contact clips by which the parts of the unit can be suitably connected to the line battery and receiving printer.

Obviously, changes may be made in the details set forth without departure from the essentials of the invention as defined in the claims.

I claim as my invention:

1. In a telegraph apparatus, sets of trans mitting and receiving contacts, correspond ing sets of controllers therefor, separate rotary rams, each operable in order upon the controllers of one of said sets, selecting devices for modifying the operation of said transmitter controllers, stops for arresting raid cams in normal position, means for mechanically setting said selecting devices and releasing said transmitter stop, means responsive to the signals for releasing said receiver stop and variably connecting said receiver contacts to a source of current supply, and rotary motor driven means for continuously advancing said cams at each operation thereof.

In a telegraph apparatus, sets of trans mitting and receiving contacts, corresponding sets of controllers therefor, separate 1'0- tary cams, each operable in order upon the controllers of one of said sets, selecting devices for modifying the operation of said transmitter controllers, stops for arresting said cams in normal position, means for echanically setting said selecting devices and releasing said transmitter stop, means responsive to the signals for releasing said receiver stop and variably connecting said receiver contacts to a source of current supply. a common motor and rotary means operated thereby for continuously advancingthe respective cams at each operation thereof.

3. In a telegraph apparatus, sets of trans mitting and receiving contacts, corresponding sets of controllers therefor, separate rotary cams, each operable in order upon the controllers of one of said sets, selecting devices for modifying the operation of said transmitter controllers, stops for arresting said cams in normal position, means for me chanically setting said selecting devices and releasing said transmitter stop, means responsive to the signals for releasing said receiver stop and variably connecting said receiver contacts to a source of current sup,- ply, and power-actuated gearing for contin uously advancing each of said cams during each complete operation thereof, the controller operating portions of the receiver cam being relatively shorter and angularly spaced farther apart than those of the transmitter cams, and said gearing being arranged to rotate said receiver cam at a cor: respondingly relatively, greater angular speed.

4.;111 a telegraph apparatus, sets oftrans- Inittmg and receiving contacts, corresponding sets of controllers therefor, separate rotary cams, each operable in order upon the controllers of one of said sets, selecting devices for modifying the operation of said transmitter controllers, stops for arresting I said cams in normal position, means for mechanically setting said selecting devices and releasing said transmitter stop, means resp'insive to the signals for releasing said receive r stop and variably connecting said receiver contacts to a source of current supply, a common motor and connecting gearing for continuously advancing each of said cams during each operation thereof, said gearing being arranged to rotate said receiver cam at a relatively greater angular speed, the controller operating portions of said receiver cam being correspondingly angularly spaced farther apart than those of said transmitter cam and extending through relatively shorter angular spaces.

5. In a selecting telegraph apparatus, a number of pairs of spring contacts, a corresponding set of controllers therefor, a

rotary cam member cooperating with saidcontrollers and normally holding said pairs of contacts open, and having portions for permitting the shift of said controllers and the closing of said pairs of contacts in order and at spaced intervals, a stop for arresting said cam in normal position at the end of each signal period, a relay means controlled thereby for releasing said stop and variably connecting said contacts to a source of current supply, and rotary power-actuated means for continuously advancing said cam during each complete operation thereof.

6. In a selecting telegraph apparatus, a number of pairs of spring contacts, a corresponding set of controllers therefor, a rotary cam member cooperating With said controllers and normally holding said pairs of contacts open, and having portions for permitting the shift of saidcontrollers and the closing of said pairs of contacts in order and at spaced intervals, a stop for arresting said cam in normal position at the end of each signal period. a start magnet for releasing said stop, rotary poweractuated means for continuously advancing said cam during each complete operation thereof, and a relay responsive to each received s gnal for operating said start magnet and variably connecting said contacts to a source of current supply.

7. In a selecting telegraph apparatus, a number of pairs of spring contacts, a corresponding set of controllers therefor, a rotary cam member cooperating with said controllers and normally holding said pairs of contacts open, and having portions for permitting the shift of said controllers and the closing of said pairs of contacts ,in order and at spaced intervals, a stop for til) llO

assigns arresting said cam i normal position at the end of each signa period, a start magnet for releasing said stop, power-actuated means for continuously advancing said cam -duging each complete: operation thereof,

a relay responsive to each received signal, one of each pair of contacts being connected in circuit with the normally engaged contact of said relay, and saidst'art magnet being permanently connected in circuit with the normally disengaged contact thereof.

i 8. In a telegraph apparatus, a set of electrically responsive selecting devices, a relay responsive to received slgnals, contact mechanism including a rotary member for connecting said selecting devices in order during each signal period to the-normally engaged contact of the line relay, powerfleictuated means for continuously advancing said rotary member during each signal period, a stop for arresting the same at the end of each signal, and a start mag-- net for releasing said stop permanently connected in circuit with the off-normal contact of the relay.

9. In an apparatus for telegraph systems employing signals each consisting of a starting interval, a definite number of se-' lecting intervals and a spacing interval, the combination of sets of transmitting and receiving contacts arranged in pairs, rotary cylindrical cams, each operable upon one of said sets of contacts in order, the transmitter cam having successively operating peripheral portions corresponding to the signal intervals and the receiver cam having operating peripheral ptirtions corresponding to the mid-portions only of the selecting intervals of the signals, and means under control of start-stop clutchesfor continuously advancing said cams during each complete operation thereof.

10. In an apparatus for telegraph systems employing signals each vconsisting of a-starting interval, a definite number of selecting intervals and a spacing interval, the combinationof sets of transmitting and receiving contacts arranged in pairs, rotary cylindrical cams, each operable upon one of saidsets of contacts in order, the transmitter cam having successively operating peripheral portions corresponding to the signal intervals and the receiver cam having operating peripheral portions corre sponding to the mid-portions only of the selecting intervals of the signals and hav ing an angular spacing relatively greater than the corresponding portions of said transmitter cam, and means er control of start-stop, slip-friction clutches for continuously advancing .said' cams at each complete operation thereof and at correspondingly different angular speeds. I 11. In'an apparatus for start-stop telejfntervals,

graph systems employing a definite interval code, sets of transmitter and receiver contacts, rotary start-stop cylindrical cams, each operable in order upon one of said sets of contacts, a set of permutation bars, means controlled thereby for mechanically modifying the operation of the transmitter cam 7 during the selecting intervals of the signals, finger keys, each arranged to shift each'of said bars and set them in different combinations, means operatedby each key for starting the transmitter cam and means responsive to the signals for starting the receiver cam and variably. controlling the circuits of the receiver contacts.

12. In an apparatus for start-stop telegraph systems employing a definite interval code, sets of transmitter and receivercontactsarranged in pairs, correspondin sets of controllers, rotary, start-stop, 'cylin ric'al cams, each operable in order upon one of said sets of controllers, a set of permutation bars, selectors operated thereby for mechanically modifying the operation of said transmitter cam during the selecting intervals, finger keys each arranged to start said Ltransmitter cam and shift each bar to one of two positions, and means responsive to the signals for starting said receiver cam and for modifying the circuits of the receiver contacts.

13. In an apparatus for telegraph systems'employing' signals separated by spacing intervals and each comprising a starting interval-and a definite number of selecting intervals, the combination of sets of transmitting and receiving contacts, rotary startstop cams, each operable upon one of said sets of contacts in order, stops for arresting said cams in normal position, said transmitter cam having overlapping peripheral portions corresponding to the signal intervals and brought into operation successively by its movement from normal position, to transmit the signals, the receiver having spaced peripheral portions brought into operation'by its movement from normal position successively and during the mid-portions only of the selecting intervals .of the signals, and motor driven means for con-' tinuously advancing each of sa1d cams at terval and a definite number of selecting the combination of sets of transmitting andreceiving cont-acts, rotary startr stop cams, each operable upon one of said sets of contacts in order, stops for arresting sa1d cams in normal position, sa1d trans mitter cam having overlap ing peripheralportions corresponding. to t e signal intervals and broiight into operation successively by its movement from normal position, to

transmit the signals, the receiver having spaced peripheral portions brought into operation by its movement from normal position successively and during the midportions only of the selecting intervals otthe signalsflzhe peripheral portion of said transmitter cam corresponding to the spacing intervals extending through a greater angular" space than any other of said portions, means for controlling said transmitter-cam and 10 trolling the receiver cam and contacts, and 15 power means for continuously advancin each of sald cams at each operation thereo HOWARD L. KRUM.

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