US1006112A

US1006112A - Printing-telegraph system.

Info

Publication number: US1006112A
Application number: US534482A
Authority: US
Inventors: Alfred S Mccaskey
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-05-03
Filing date: 1909-12-22
Publication date: 1911-10-17
Anticipated expiration: 1928-10-17

Description

A. s. MQ ASKEY. PBINTING,TBLEGBAPK sysrnm.

APPLICATION FILED DHOJB, 1909. 1,006, 1 1 2, Patented Oct. 17; 1911.

A. S. MOUASKEY.

PRINTING TELEGRAPH SYSTEM.

APPLICATION FILED DEC. 22, 1909.

Patented Get. 17, 1911.

7 SHEETS-SHEET 2.

A. s. flIoASKEY.

PRINTING TELEGRAPH SYSTEM.

APPLICATION FILED DEC. 22, 1909. 1 0mg 12, Patented 001. 17, 1911.

. A, s. MoGASKEY. PRINTING TELEGRAPH S'YS'IEM. APPLIUATION FILED DEC. 22, 1909 1,006, 1 1 2., Patented Oct. 17, 1911.

7 SHEBTS SHEET 4.

wumwoz r aitomws' A. S. MGCASKEY- PRINTING TELEGRAPH SYSTEM. APPLIGATION FILED 1120.22, 1909.

1,006,1 12. j Patented Oct. 17, 1911.

7 SHEETS-SHEET 5.

. aw x.

A( S. MQGASKE Y. PRINTING TELEGRAPH SYSTEM. APPLIOATIQN IILBD 1120.22, 1909.

1,006, 12. Patented 00c, 17, 1 911.

7 SHEET9-8KEET 6.

A. S. MOUASKEY. PRINTING TELEGRAPH SYSTEM.

APPLICATION FILED D30. 22, 1909.

Patented 0011.17, 1911.

I 7 SHEETS-SHEET 7.

the distributer, energize the controlling magnets for the selector magnets and set up a combination in the controlling magnets which is thereafter transmitted to the selector and translated into a distinct meproducing the printing,

' segments, and said rotary arm is included in a circuit which includesthe relay, the escapement magnet and the selector controlling magnet, so that when this circuit is closed, the current passes from said relay to the esca'pement magnet and actuates the escapement, and through the rotary'arm of the distributer and the segments thereof and thence to the several selector-magnet-controlling-magnets connected with said segwants from which it returns to the relay.

. the distributer.

After a series of permuted impulses have been translated in the selector, and the printing of the character represented by the impulses effected, the controlling magnets are restored so as to be enabled to receive the next succeeding series of impulses to be transmitted thereto. The two sets 01' selector-magnet-controlling-magnets operate independently of each other and the restoration of one set has no effect upon the action of the other set.

In the drawings :.-Figure'1 is a planview of the distributer. Fig. 2 is a vertical section on the line 2-2 of Fig. 1. Fig. 3 is a top plan section on line 33 of Fig. 2. Fig. 4 is a side elevation of the distributer looking in t-l e direction of the arrow on Fig. 3. Fig. 5 is-a bot m plan section on the line 55 of Fig. Fig. 6 is a deta l section on the line 66 of Fig.4. Fig. 7 is a plan view of the selector. F196. 8 and 9 are side and end elevations, respectively, thereof. Fig. 10 is a partial diagrammatic view of the selector plates. Fig. 11 is a diagram showing the selector and printing circuits. Fig: 12 is a partial plan View of the printing device. Fig. 13 is a side elevation thereof. Fig. 14 is adiagrammatic View showing the several circuits at the receiving station. Fig. 15 is a fragmentary detail of Fig. 16 is a view showing the means for restoring the armatures of the selector-magnet-controlling magnets.'

The distributer which receives the current from the main line at the receiving station is illustrated in Figs. 1 to 6 and Figs. 14 and 15, and is provided with a vertical shaft I which is given a step-by-step movement by the magnet I Fig. 14, through an escapement comprising anescapement lever I and ratchet I on the shaft. The shaft I tends to continuously rotate through the mediumof clock or other suitable motor mechanism 2' as indicated in Figs. 2 and 4. The shaft I carries a rotary switch arm I which travels over an annular set of ten segments 2' insulated from each other. Said arm I is also provided with a tail piece which travels in contact with two semicir- 'cular plates 2' which separately close the circuit to the selector magnets, as will hereinafter appear; Said. shaft I also carries below the segments 2' a disk I- The selector L, which is illustrated in Figs. 7 to 10, consists of a frame supporting 81 series of plates L each series being composed of six plates, between the adjoining ends of which are five breaks in the circuit. The plates of the 31 series are connected together at one end by a cross-bar L and are separately connected atthe' other end to wires 15 leading to small printing magnets L which separately control a powerful printing magnet M. Mounted beneath the plates L and extending parallel with each of the breaks between the plates referred to, is an insulating block or segment L. each carried on a rock-shaft L The insulating blocks I carry in line with each of the plates L metal plates Z some of which close the breaks in one position of the blocks Lt, while others close the breaks in the other position thereof. Said blocks are moved to one position by magnets, as hereinafter described, and are moved into their other positions by retracting springs. Said plates are so arranged that a' permuted series of impulses closes all the breaks between one longitudinal series of platesand thereby establishes a path therethrough for the selector circuit. Keyed to one end of each of said rock shafts is a lever L carrying an armature Z at its lower end, said armature being attracted by one of the selector magnets Ii numbered from 1 to 5, three located on one side of the series of selector bars or elements and two on the other side thereof. The levers are retracted from the armatures by springs Z The line wire 5 leads to the magnets of a polarized relay J, which is shown as made like the polarized relay illustrated and described in my prior U. S. Letters Patout, No. 498,289, granted to me on the 30th day of May 1893. One of the tongues of said relay is adapted for contact with a terminal 7', and the other with a terminal j. Said polarized relay controls two circuits. One, when one of the tongues is in contact with the terminal j, closes a circuit to the escapement magnet I through

wires

6 and 7, and the other, when the other ,tongue is in contact with the terminal j closes a circuitthrough one of two sets of magnets K, num- A;

capementmagnet 1 end trom thence by wire 7'haclr to the relay. The magnets K control the selector magnets L through a local circuit which is closed through the tail, piece of the arm 1*, the semi-circular plates 2' of the distributer, and through the armatures of the magnets K. Said circuitineludes wires 12oleading from said plates to the armature levers I; at the magnets K,

contact points k with which the armature levers have contact when the magnets K are energized, wires 13 leading from said contact points to the selector magnets, and-wire 14 leading .from the selector magnets throughth'e-tail piece of thearm I hack to one of the plates 2 The armature levers l: of the magnets K which controlthe selector magnets normally rest against stationary hack stops 7c and when the armatures are attracted by their magnets, they are adapted; to he'l'ocked in their attracted positions by means of springpressed locking levers M. 'For this purpose ez-ch two armatures and levers are provided on their adjacent ends with roller contact IMGCBS; lVhen each armature 7: is in its normal position, against hack stop .5, thecenter of the roller of said armature lever is located outside the center of the roller of the lock-' in'g lover vVhen, however, the armature lever is moved to its attracted position, said roller of they armature lever is located inside of the center of the;rolle r of the locking lever. the spring ofthe lever yielding'to per i mit this movement and acting. to lock said armature lever in its attracted posltion, Means are provided for restoring sald armatures it to their normal positions afterthe printing has occurred, consisting of rock-- shafts K (Fig. 16) provided with rigid arms in whichpass inside the arniaturcs and are adapted, when the shafts are rocked in one direction, to throw the armatures out away from the magnets, as shown in Fig. 16. The shafts K are rocked and the arms lcf, swung to move the armature levers is away from their magnets by means of re storing magnets N, one for each set of magnets K. Said restoring magnets N are in cluded in eircuits'which are closed immediately after the printingthas occurred so as to restore the armatures of the selectormagnet-controllirig-magnets in order that another permutation of impulses may he set up thereon.

Before describing further the action of the restoring magnets and the means for energizmg the same, I Wlll referhrlefly to the printing device herein shown, and the action which the printing device has on the-restoring' magnet circuit. i

It will be understood that the printing device may be either a printing. type-wheel or an electric typewriter of common form. 'ihe latter device is herein shown and so arranged that the single printing magnet M severally actuates all of the levers of the typewriter. The construction is shown in Ii igs. 12 and 13 and is made as follows: (7) O designate the printing lovers of a type writer, each having an upright arm 0 pivoted at its lower end to said lever and normally retracted in one direction against a stop by a spring 0. O designates a frame which is pivoted on a shaft 0 and carries the armature m of the printing magnet M.

.The magnets L connected by the wires 15 with ,the selector plates L are located in rear of the pivoted arms and each oi said magnets, when energized, draws its of the arms Said arms when drawn under thetramei) hytheir magnets, have contactwith a stationary metallic crossbar and said cross-bar isconnected by a wire 20 with the magnet M. It will he seen thcre-- tore that when each arm 0 is separately moved by itsmagnet into contact with the cross-bar 0", t-he circuitto the magnet M is closed, and the frame 0 is depressed to make contact with said arm OPandactuatcs theparticular type oar connected witl'r said arm. The circuit through the selector is closed-by means of a magnet l. which, when ene gized, attracts one end of an arn'iature lever P and throws the other end ihcreot into contact with a terminal 7). Said armature lever is connected by a wire 17 with the cminecting plate Li of the selector and therethrough to any 'of a. closed series of the selector plates. The magnets if, connected with said selector plates, are all connected by a return wire 18 with the tcri'ninal 7). Consequently, when the selector circuit is closed at 72 one of the magnets l) is encr giaed and closes the printing circuit in the manner described, including the magnet M and wires 19 and 26 and eilec the printing of a character as described. When the frame O of the printing device is depressed, an-

arm '0 rigid therewith is moved into con tact with a terminal 0 and said arm and gized by a local circuit embracing wires 21 controlling-magnets K.

and 22 connected, respectively, with a terminal lever I and a yielding stop I located at the distributer. The terminal I is moved into contact with its yielding stop I and the circuit to the magnet P closed by radial projections 2' on the periphery of the disk I carried by shaft 1, just after the outer end of the switch arm I has passed ofi one set of segments 2', and after a time when a permuted series of impulses has been transmitted to one of the sets of selector-magnet- As said arm 1 passes ofi said set of segments, the tail piece of said arm passes onto one of the plates 2' which is in circuit with the armatures of the energized set of magnets K, as heretofore described, and thereby closes the selector magnets circuit through the selector magnets, thereby establishing a determinate path through one of the series of collector plates, in the manner before described. Immediately after said path has been established, one of the projections 2' moves the terminal lever I into contact with its yielding stop I, and closes the selector-circuit-controlling-circuit through the magnet P, as heretofore described, thereby closing the selector circuit which closes the'printing cireuit,in the manner described.

The restoring magnets N are controlled by magnets R which are included in local circuits embracing wires 24 leading to terminal levers 1 and wire 25 leading to yielding back stops I with which said levers are adapted to have contact. Said terminal levers 1 are moved into contact with their back stops I by means of a semi-circular drop flange i on the disk I", one of said circuits being closed durin one half of the rotation of the disk, and t e other closed during the other half of such rotation. Said restorin g-magnet-controlling-magnets B, when energized, attract armature levers. r and move the same into contact with terminals 1". Said armature levers are locked in their attracted positions by means of springpressed locking levers 7 these parts operating like the similar parts In, and is, before described. Each of said armature levers 1', when incontact with its terminal r closes a local restoring magnet circuit, the two

circuits including wires

26 and 27, the former leading to contact plates 2' on the terminal levers 1 and the latter to sta tionary back stops i respec'tively, for the levers 1 A break occurs in the wire 26 at the terminal 79 which is closed when the armature lever P is in contact therewith,

and which closing occurs immediately after the printing is effected. While a permuted series of impulses are being set up on one set of the controlling magnets K for the selector magnets, as, for instance, the upper set, the

terminal lever 1 included in the circuit of the upper restoringmagnet-controllingmagnet- R is traveling on the drop flange 6 which closed the circuit to said upper controlling magnet R. The energizing of said upper controlling magnet R moves its armature lever into contact with its terminal 7' and closes the circuit at this point for the upper restoring magnet N The circuit for said upper controlling magnet is open at the back stop 2' when the terminal lever 1 is moved away therefrom into contact with its yielding stop. Until the selector circuit controlling magnet P is energized, said restoring circuit is also closed at the, terminal 9 It will be seen, therefore, that each restoring magnet circuit must be closed at three points in order to energize the restoring magnet, viz., at the terminal 7", the terminal p and the back stop i Just before the terminal lever 1 moves ed the drop flange and therefore permits the plate i to contact with the back stop i themagnet P is energized by contact of the terminal lever I with its yielding stop I so that the restoring magnet circuit is open at the terminal p before it is closed at the back stop i This operation prevents the energizing of the restoring magnet before the printing is efiected. After the printing is effected, the armature lever P is moved into contact with the terminalp by the magnet Q, and completely closes the restoring magnet circuit, thereby permitting restoration of the armatures of the upper set of magnets K. The action of the lower set of restoringmagnet-controlling-magnets is the same as that above described, the lower controlling magnetRbeing energized at the timea combination is being set u on the lower magnets K. While a serles of permuted impulses are being sent to the selector from one 'set .of magnets K, and are by the selector translated to effect the printing of a character represented by said impulses, a new combination is being set up on the other set of magnets K to be subsequently transmitted to the selector. y

The deenergizing of the controlling magnets R for the restoring magnets by the opening of the restoringmagnet-controllingmagnet circuit at the terminal levers I has no effect on the restoring circuit for the reason that the armatures 1 thereof are held in their attracted positions by the locking levers 1' and are held in such positions until restored by the magnets N. It will thus be seen that the sets of selecting-magnet con trolling-magnets alternately control the 'selector magnets and that their action is entirely independent of each other, so far any liability of confusion between the two trolled; by that magnet will not be restored 1n the inter m between the translation of one be promptly returned by their retracting.

springs and the closing of the ciigcuit to the other set controlling magnets will have no effect thereon. This is dueto the fact that the ring 1'. included in both of said circuits is composed. of two insulated segments.

In order to produce synchronism between the transmitting and receiving devices, I have introduced into the line wire 5 a regulating device made as follows: Said line wire broken atnai point near the distributer and a make and break in. the circuit is produced by the action of the distributor escapcmcnt lover. I For this purpose the line wire is ,connecteth'at one side of the break with a swinging terminal lever V, which is normallyheld by a spring against a terminal V to which the line at the=other side ofthebreak is connected.-- A tail piece on the escapement lever is adapted for contact with the terminal lever V and is insulated. thereto "in the parts being so organized that when the escapement lever is attracted to its actuating. magnet it moves the terminal lever V from the terminal V and produces a break in the main circuit. The escape ment levers for the collector-and distributor are placed under theinfiuence of springs in a manner-to withdraw them ironr'their actuating magnets, and to thereby complete the action of the escapement mechanism. In the event of the distributor shaft I stopping at ,a point intermediate its normal position of rest, a. restorn'ig dev ce 1S brought into i operation which is shown in Figs. 4 6 and 14. The restoring device consists of two springs I I which, when the shaft is in any of its proper positions of rest, bear upon insulation on said shaft but when the shaft'is in an abnormal position, bear upon the shaft. These springs when in the latter posit-ion, closea local circuit to the mag net I which operates the escapement mechanism of the distributor. The local circuit includes a suflicient resistance whereby a current fromthe local battery is less than that which passes through the' magnet when the operating circuit is closed at j 01' 7' The automatic restoring circuit, therefore, has no effect on the magnet 1 during the normal operation of the distributer. Should the shaft, however, stop at an intermediate point, the magnet I will be energized by the local automatic restoring circuit through the springs I to turn the shaft I to its proper position, after which rotation will continue through the main operating circuits.

What I claim is 1. In a telegraph system, wherein the characters are distinguished by permutations of a number of impulses of opposite polarity, the combination with the line and relay, of a distributor having a pluralitypf sets of distributing plates,'each distributing the impulses representing a single character, and operating successively, whereby'the im pulses representing successive characters will be distributed to the receiving appara-' tus through dili'erent circuits, and a receiving apparatus having sections corresponding in number to the sets of distributing plates, each section receiving the impulses of a single character from one of said sets of dis tributing plates.

2. In a telegraph system wherein the characters are distinguished by permutations of anumber of impulses of opposite polarity;

the combination with the line and relay, of a distributor having two sets of dist ibuting plates each rcceiving't-he impulses of a single: character and operating successively whereby the impulses representing successive characters will be distributed to the receiving apparatus through different circuits, and one or more circuit controllers, operated by the distributer and controlling circuits to the receiving apparatus corresponding to the two sets of distributing plates, such additional circuits being clo'secl'for one set'of distributing plates, while the other set of distributing plates is in action.

3. In a printing telegraph system wherein the characters are represented by permutations of impulses, the combination with the main line of the selecting mechanism, two sets of controlling magnets therefor, and means for operating said sets in alternation.

4:. In a. printing telegraph system, and in combination with the main line, receiving mechanism comprising means for distributing the received. impulses, and a selector receiving said impulses, said selector comprising a number of sets of plates, each set having normally a number of interruptions, a series of circuit-closers adapted to close the circuits through said sets of plates, and

5 elements, each set having normally a number 2 of interruptions equal'to the number of permuted impulses transmittedover the line, a.

series of circuit closers adapted to close the circuits through said sets of conducting elements, and means for operating said circuit closers singly and in selected groups.

3. In a printing telegraph system wherein the characters are represented by permutations of impulses, the combination with the main line, of the selecting mechanism, two sets of controlling magnets therefor, means for operating said sets in alternation, and a restoring magnet for each of said two sets;

7 In a printing telegraph system wherein the characters are represented by permutations of impulses, the combination with the main line, of the selecting mechanism, two sets of controlling magnets therefor, means for operating said sets in alternation, a restoring magnet for each of said two sets and a controlling magnet for each restoring magnet.

8. In a printing telegraph system wherein the characters are represented by permutations of impulses, the combination with the main line, of the selecting mechanism, a plurality of.sets of controlling magnets therefor and means for operating said sets in alternation.

9. In a printing telegraph system wherein the characters are represented by permutations of impulses, the combination with the main line, of the selecting mechanism, a plurality of sets of controlling magnets therefor, means foropcrating said sets in alternation, and a restoring magnet for each of said sets of controlling magnets.

10. In a printing telegraph system wherein the characters are represented by-permutations of impulses, the combination with the line and relay, of a distributer, a selecting mechanism, a plurality of selecting magnets, and a plurality of controlling magnets for said selecting magnets.

11. In a printing telegraph system wherein the characters are represented by permutations of impulses, the combination with the line and relay, of a distributor, a selecting mechanism, a plurality of selecting magnets, and a plurality of sets of controlling magnets the number of magnets in each set being equal to the number of selecting magnets. f

12. In a printing telegraph system, the combination with the main line, of a receiving mechanism comprising means for distributing the received, impulses, a selector receiving said impulses, said selector comprising a number of sets of conducting members each sethaving normally a number; of interruptions, a series of circuit closers adapted to close the circuits through said sets of conducting members, and magnets for operating said circuit closers singly and i" selec d groups.

13. In, a printing telegraph system, the combination with the main line, of a receivmg mechanism .comprising means for distributing the received impulses, a selector receiving said impulses, said selector comprising a number of sets of conducting members each set having normally a number of interruptions, a series of circuit closersadapted to close the circuits through said sets of conducting members, magnets for operating said circuit closers singly and in selected groups, a plurality of sets of controlling magnets for said first-mentioned magnets, and means for operating said sets a number of sets of conducting members,.

each set having normally a number of interruptions, a series of pivoted circuit closers adapted to close the circuits through said sets of conducting members, and magnets for operating said circuit closers singly and in selected groups.

15. In a printing telegraph system, and in combination with the main line, receiving mechanism comprising means for distributing the received impulses, and a selector receiving said impulses, said selector comprising a number of sets of conducting members, each set having normally a number of inter.- ruptions, a series of pivoted circuit closers adapted to close the circuits through said sets of conducting members, magnets for operating said circuit closers singly and in selected groups, a plurality of sets of controlling magnets for said first-mentioned magnets, and means for operating said sets in alternation.

16. Ina prin ing telegraph system, the combination Willi the main line, of a distributer which receives the impulses, a selecting mechanism to which the impulses are distributed, a plurality of sets of controlling magnets therefor, means forbperating said sets in alternation, and a restoring magnet for each of said sets arranged in a local circuit which is adapted to be closed at the distributer.

17. In a printing telegraph system, the combination with .tl 1e main line, of a distributer which receives, the impulses, a selecting mechanism to which the impulses are distributed, a plurality of sets of controlling magnets therefor, means for operating said sets in alternation, a restoring magnot foreach of said sets, and a controlling magnet-tor each of said restoring magnets arranged ina local circuit adapted to be closed at the distributer.

18. In a printing telegraph system wherein the characters are represented by permutations of impulses, the combination. with the main line, of a distributer, a "acting mechanism, a plurality of sets of controlling magnets therefor arranged in a local circuit adapted to be closed at the distributor, and means for operating said sets in alternation.

19. In a printing telegraph system wherein the characters are represented by permutations of impulses, the combination with the main line, of a distributor, a selecting mechanism, selector magnets associated therewith and arranged in a local circuit adapted to be closed at the distributor, a plurality of sets of controlling magnets for said selector magnets, and means for operating said sets in alternation.

20. In a printing telegraph system wherein the cha actors are represented by permu-' tations of impulses, the combination with the main line, of a distributer, a selecting mechanism, a pin 'ality of sets of controlling magnets therefor, and means for operating saidsets in alternation.

21. In a printing telegraph system wherein the characters are represented by permutations of impulses, the combination with the main line, of a distributor, a selecting mechanism, printing means operated thereby a pluralityv of sets of controlling magnets for said selecting mechanisili, and means for operating said sets in alternation.

In a printing telegraph system, the ccunbination with the main line, of a dis trib'utcr, a selecting mechanism comprisinga number of circuits, and a magnet in series with each circuit for 'efieeting the printing of the character corresponding to the transmitted impulses.

In a printing telegraph system, the combination with the main line, of a distributer, a selecting mechanism comprising a number of circuits, a magnet in series with each circuit, and a single magnet arranged in a local circuit controlled by each of said other magnets, and means operated thereby for effecting the printing of the character corresponding to the transmitted impulses.

24. In a printing telegraph system, the combination with the main line, of a distributer, a selecting mechanism, a printing device associated. therewith, a plurality of controlling magnets for said. selecting mechanism, a restoring n'iagnet for said control ling magnets arranged in a local circuit normally interrupted at a plurality of points, and means operated by the printing mechanism for closing the restoring circuit at one of said points.

25. In a printing telegraph system, the combination with. the main line, of a distributer, a selecting mechanism, a printing device associated therewith, a plurality of sets of controlling magnets for said selecting mechanism, a restoring magnet for each set of controlling magnets arranged in a local circuit normally interrupted at a plurality of points, and means operated by the printiiig mechanism for closing the restoring circuit atone of said points.

26. In a printing telegraph system, the

combination with the main line, of a polar ized relay, an escapement movement associated therewith, and a make-and-breakdevice for the circuit associated with said escapement movement to produce synchronism between the transmitting and receiving devices.

27. In a printing telegraph system, the combination with the mainline, of a polarized relay, a magnet associated therewith, an armature for said magnet, and means operated thereby to make and break the main line circuit to produce synchronism between the transmitting and receiving devices.

28. In a printing telegraph system, the combination with the main line, of a polarized relay, a distributor, an escapement magnet associated with said polarized relay and associated with said distributer, an armature for said magnet, and means operated thereby to make and break the main line circuit to produce synchronism between the transmitting and receiving devices.

29. In a printing telegraph system, the ,combination with the mainline, of a'polar ized relay, a distributer comprising a shaft and a rotating arm mounted thereon, a selecting mechanism to which impulses are delivered by said rotating arm, an escapement magnet associated with said relay and adapted to rotate said shaft, and means for energizing said magnet to rotate said shaft when the latter stops at an intermediate point.

P 30. In a printing telegraph system, the

combination with the main line, of a polarized relay, a distributor comprising a shaft and a rotating arm mounted thereon, a selecting mechanism to which impulses are delivered by said rotating arm, an escapement magnet associated with said relay and adapted to rotate said shaft, and a pair of arms acting to close a local circuit through said magnet to rotate saidshaftwhen the latter stops at an intermediate point.

31. In a printing telegraph system, the combination with the main line, of a polarized relay, an escapement movement associated therewith, and a make-andbreak device in the main line circuit and associated with said escapement movement to produce synchronism between the transmitting and receiving devices,

32. In a printing telegraph system, the combination with themain line, of a polarized relay, a magnet controlled by said relay, an armature vfor said magnet, and means operated. thereby to make and break the ,main. line circuit to produce synchronism between the transmitting and receiving devices.

,33. In a printing telegraph system, the

combination with the main line, of a polarized relay, a distributer, an escapement magnet controlled by said polarized relay and associated with said distributer, an armature for said magnet, and means operated thereby to make and break the main line circuit to produce synchronism between the transmit;- ting' and receiving devices.

34. In a printing telegraph system, the combination with the main line, of a polarized relay, a distributor comprising a shaft and a rotating arm mounted thereon, a selecting mechanism to which impulses are de liver-ed by said rotating arm, an escapemcnt magnetcontrolled by said relay and adapted to rotate said shaft, and means for energizing said magnet to rotate said shaft when the latter stops at an intermediate point.

35. In a printing telegraph system, the combination with the main line, of a polarized relay, a distributer comprising a shaft and a rotating arm mounted thereon, a se lecting mechanism to which impulses are delivered by said rotating arm, an escapement mechanism controlled by said relay and adapted to rotate said shaft, and a pair of arms acting to close a local circuit through said magnet to rotate said shaftwhen the latter stops at an intermediate point.

In testimony whereof I have signed this specification in the presence of two subscrib ing witnesses.

ALFRED S. MGCASKEY.

\Yitnesses:

Josnri-r J. GULER, W'. T. McCAsKEY.