US1085496A - Apparatus for type-writing at a distance. - Google Patents

Description

.11. nM. SCHNRER.- f APPARATUS POR TYPE WRITING AT A DISTANCE.

I APPLIOATIN FILED APB.. 20, 1911. 1;()85495 Patented Jan. 27, 1914 l 5 SHEETS-SHEET 1.

INVENTUR: #Wind/W miwss's's:

H. E. M. SGHNRER;

APPARATUS POR TYPE WRITING AT DISTANCE. rPLIoATIoN FILED APB. zo, i911.

5 SHEETS-SHEET 2.

`1,685,496, Patenlmm1-2zi914.

wrwwessas: /NvENron:

ArrohNeyL APPARATUS FOR TYPE WRITING AT A DISTANCE.

APPLIUATION 11.21) APB. zo, 1911.

:Il-,085,496 Patented Jan. 27, 1914.

. 5 SHEETS-SHEET a.

Arron/Vey:

. H. E. M. SGHNRBR. APPARATUS FOB TYPE WRITING AT A DISTANCE. A APPLIUATIoN FILED APE. 2o, 19112 1,085,496, l L l Pa-tented Ja.27,1914

5 BHBBTB-BHEET 4r.

@mi JL" HMI WITNESS. INVENTOH.'

Tf mmf/ H.E.M.SGHNRBR APPARATUS POR TYPE WRITING AT A DISTANCE.

- APPLICATION FILED APR. 20, 1911.

1,085,496, l Patenteu Jan. 2?, 1914@ 5 SHEETS-SHEBT 5.

vin

l rod 5 of insulating conducting material.

Similar reference characters indicate the same parts throughout the several iguresof the drawings. v

In order that the invention may be clearly understood I will first describe in detail in order the princi al parts of my apparatus, and subsequently their operation.

The a aratus at the typem'itng machine itself, lgs. 1, 2 and 3.)--Of the typewriting machine itself only those' parts are represented which are requisite for understan in'g the invention and enable the machine to operate astralnslnitter or receiver 'm each instance as required. Each key1ever 2, revoluble about the common shaft 1, is lengthened by means of a projection or prong 3. The Said shaft, kei-levers and their prongs are composed o electrically The free ends of all the prongs 3 are located in a line arallel to the common shaft 1 and together orm a socalled key-lever comb. In the line of each prong and only ay few millimeters from the free end thereof is located the end of another prong 4, a so-called solenold prong, all of which are fast on a common material and ,together form the so-called solenoid comb, because from each solenoid prong-no such prong' belongs to the starting key described hereinafter--a Wire 6 leads to the coil of a solenoid 7 arranged under each key-lever 2 with the exception of that of the starti'ngfkey; the core 8 of each solenoid is electrically non-conductively connected withthe appen taining key-lever and when attracted bv the energized solenoid depresses its key-lever. This occurs, as more fully ex lained hereinafter, in the typewriting mac ine acting for the time being as receiver. The other end of each solenoid coil with the exception of that appertaining to the Aterminating key-lever is Vconnected by a wire 24.- with a metallic member 25 common to all the solenoids. The adljacent key-lcver prongs 3, on the one hand,

and the adjacent solenoid other hand, are separated om one another by'slabs 9 of insulation. All the slabs 9 are arranged at intervals of 2 to 3 millimeters apart as prongs fast on a revolublc rod 10 parallel to the key-lever shaft 1, are preferably connected by distance pins or the like 11 and form the so-`called upper contact comb, because each slab 9 carricsin its upper part at both sides a contactl plate 12. The contact plates 12 `of each slab 9 are insulated 'from one another, Whereas the plates 12 of two adjacent slabs 9 facing one anothermay be electrically connected together. The lateral edges of the Contact wrongs 4, on the plates l2 of cach slab 9 do not extend in the position according to Fig. 1 to the ends pf the prongs of the keylevcr and solenoid combs.

ranged at bothy sides on the When the upper dontacc comb is l The purpose of this rocking of the upper contact comb toward the key-lever comb and the solenoid comb is to set the typewriting machine 1n question to transmitting and receiving, respectively.y Spri 13 are ars lever and solenoid comb rongs 3 and 4 in order to assure a ood e ectrical contact of those prongs whic are connected in circuit, for the time bein with the contacts 12. The pron ,'14 of t e so-called lower contact comb,y projectinto the spaces between two ad]a'cent slabs 9 of the u per contact c omb below the pron 3 wit out at any time contacting-with econtact plates 12.

'The prongs 14 of the lower contact comb are composed of electricall conducting material and are electric connected together, e. g, the entire coing may be cut out of one piece of metal. The lower contact i' comb is held by screws 15 for exam le but :can movevup and down within smal limits about an axls parallel to the shaft 1 and is under the action of sprin 16 `which admit of this motion relative y to the screws 15 and return thedepressed comb into its normal' position after the pressure has ceased.

For understanding what follows, the fol,

lowin points regarding the various combs muste borne in mind: Firstly, in the ke lever comb each prong is movable in ependently of the others downwardly and upwardly about the common shaft 1, and all `the prongs are electrically connected together by this shaft. Secondly, in the solenoid comb each prong is immovable, like the -comb itself, and insulated from the others. Thirdly, in the upper contact comb the plate-shaped prongs are insulated from one anotherand not individually movable, but the Ientire comb can rock. Fourthly, in the lower contact comb in the illustraltive embodiment the electrically-connected prongs are not individually movable, but the entire comb is movable downward and upward. Each prong may however bc movable by itself and spring-pressed, and may be insulated from the others. Now When any lcfgyin 'the transmitterf comprisin the upper contact comb in theuposition siown i in dotted lines in Fig. 1 is depressed, the

prong 3 of the appertaining key-lever will leave the contact plate 12 of the upper contact comb and contacts with the lower contact comb which is thereby depressed. On

the prrffsure on the key ceasing the key-` lever r ':.urns into its normal position, when itsprongw again contacts wlth the apperrocked, however, a little to the right, as ini taining contact plate 12 of the upper conincense tact comic. The iower contact comb siinnltaneously returns into its normal position.

l the -l eylevers is located Within reach or the prong of the starting key A1', whereas the arm 17 of the lever is Within reach the prong of the terminating key S1. 1When the starting key A1 is depressed the arm 17 is consequently depressed, the upper Contact comb is rocked toward the key-levers as shown in dotted lines in Fig. l, and the typewriting machine is set for transmitting. `When the terminating key S1 is depressed, on the contrary, the upper Contact conch is rocked toward the solenoid comb, that is to say the typewriting machine is set for rcceiviiig as incre particularly described here inai'ter. A. lever 18, carrying at one end a contact it", projects at an angle from the l ver 17. rThis contact 19 is Wedge-shaped l has one, e. g. the upper, half composed electrically conducting material and the c. g. the lower, of insulating material This contact may he directly on i, ai'in of the lever. A t the saine time as the arm 17 is depressed, 2'. for receiving, the Contact 19 operates by entering between two contacts 50 and 51 resting elastically one on the other and presses them apart, 'the conducting half of the contact 19 remaining, however, electrically connected with the ct ofliel.

ilfig. ll. w,

contact .50. in the transmitter, on the contrary, the arni 17 is depressed, and the contact 19 moves away from the contacts 5G, 5i which reioain electrically connected. The purpose thtneof,y the connection oi the lincrclay circuit ina definite inanner, more "fully explained hereinafter. ln addition, the arm 17.- carries a contact lf3/'hen arm 17 is depressed, e when the mac. is eet as transmitter, the contact 52 conta with another contact which, as descriiied hereinafter, appertains to the line of the inolor-hattery inain circuit and thereby closesthis circuit. if, however, the arno l? depressed, theI contact 52 breaks the motorhati'cry main circuit at Obviously, this takes place/always after use in all stations, because these are all set to receiving.

viff/:yy .mcc'miiisiii, of the clutch, (Figs. l and 5.)- iion-conducting material, iu u'liose periphery so many embedded contact plates 2l insu lated from one anothe are arranged as the typewriting machine,possesses types. v'lach contact plaie Q1 is connected hy a wire Q2 with that contact plaie l2 of the up] er coiitact coinli which corresponds to the keyleveil of the saine type-character. lli/*hlm the nous rotation or the ai-nurture, as will hc more Ateach Stationv I provide a disk 2O of pointer 23 rotates its elastic hrush 2G, which so broad that it bridges oicr the f fap he tween two contacts 2l. (Fig. 5), slides on the Contact plates 2l and before leaving one oie the saine is eiectiiculli" connected with the next in the direction of rotation. The pointer Q3 must he so mounted on the a tile 2T, passing through the. center ol the disk 20, that it does not participate i the axial ilisplacement of the axle when the latter is coupled with its lri\iugV uiechuiiisni or de tached therefrom. liecause otherwise thc brush 26 would not constantly contact with the contacts 21. To this end, in the illustrative euiliodinient the hoss of the pointer 23 is fast on a sleeve- 29 which is u iounted revoluhly,- but axially non-displaceihly in thc traine 35, surrounds the axle 2T and is connected with the latter by nicans of a key and groove. The pointer 23 may, however, he elastic and directly secured on the axle QT. A compressed coil spring 3l abiil'tingagainst both the inwardly flanged end or' the sleeve il() and against the enlarged portion of the aide Q7 tends to press the latter to the right as seen in Fig. l, that is to say to draw the armature 32 secured to the one end of the axle El? tonni-d the disk E; on the other cally non-conducting material, c. g. ivory, having a. diameter approximately equal to that of the armature S9.. the one part of an electromagnetic clutch Q0. Opposite this tooth a rim of like teeth :Sli for locking or 'checking the armature is attached on the frame The nunihcr of l teeth $35 is equal to the nunihei' of types in 1 the typeii'riting machine and these teeth are so arranged relatively tothe plates 2l on the l disk 20 that the central lines ot' their gaps i exactly coincide with the central lines of the contact plates Qi. @n the other hand, the tooth l-is `so arranged relativeljl to the 'pointer that, when the point of the tooth at the deepest part 3T oi the iiidividnal gaps iii the riin of teeth, the ceutrail liuc oi is. locatct.

the lii'ush 2G is located exactly over the central liiic of that contact plate 2l which appcrtaiiis to the gap entered by the tooth 'lhis arrangement is for equalizing the unavoidableerror in the synchroi'fully described hereinafter. Opposite the tcotliless faire ofthe armature 32 is a potshapcil magnet 3B which foi-nis the other ineinber of the clutch and is fasi on au axle 39 coaxial with the axle 27 and carrying a worin Wheel 40 with which meshes a worm 43 keyed on the shaft #il of the motor I Current from the clutch battery H (Fig. l, 8) can he supplied. in the manner described hereinaterto the pot-shaped magnet 38 l 7while it rotates. When this takes place, the l armature 3Q. is attracted, whereby the axle end o: the axle f2? is a disk of electri-y aiid has on its face a tooth 34e facing the disk' The latter forms Iico 27 is coupled with the axle 39 and rotates therewith until the supply of current to the magnet 3S interrupted and the armature is moved away from the magnet by the spring 3l, a'. e., the clutch is disengaged. At the same moment the pointer 23 remains with its brush 26 on the contact plate 21 in iuestion. As the point of the toot-h 34 of t e armature is removed, when the armature is attracted, only the fraction of a millimeter out of the range of the points of the teeth 36, when it begins to move away from the magnet 138 it enters into the gap located at this moment exactly opposite to it and always slides under the action of the spring 3l into its normal position, in which its point located at the deepest part 37 of the gap.

Againstthe face of the plate or disk 33 nearest the disk 20 lies a small wheel or antifriction roller 44 journaled in the upper arm of a lever 4G pulled by a sprin 45 toward the disk The lower end o the lever 46 of electrically conducting material is located in such manner between two elastically mounted contact pins 47,'48 so that when the armature 32 is attracted, the lever 46 moved by the disk 33 moved in the same direction abuts against the pin 48, whereas when the armature is released the lever abuts against the pin 47.` Obviously, the lever 4G may be moved by the displacement of the axle 27 in other suitable manner. Theiparts 33, 44, 45, 46, 47, 48 form a s0- called local relay, whose purpose and action are described hereinafter.

The rc/Lions Zim/tary @remita-T0 each typewriting machine there belong four different battery circuits: firstly, the circuit-of the motor battery I (Fig. 7) which is oper ative both in. the transmitter and in the re ceiver in order to rotatethe two pointers4 Q3 synchronously; secondly, the circuit of the clutch battery II (Fig. 8) which is like wise operative both in the transmitter and in the receiver in order, by simultaneously energizing the pot-shaped magnets 38, to obtain sinmltanecus engagement of the pointers 2.3 with the motor shafts 4l; thirdly, the circuit of the writing battery III (Fig. 2)) which is operative only in the typewriting machine operating for the time beingr as receiver; and `fourthly, the circuit of the line battery IV (Fig. l0) which serves for caus ing a line relay, more fully described here imiter, at the receiver to be influenced by the transmitter for the time being and, consequently, tor causing the battery circuit of 'the receiver to be automatically prepared and cut out again after use.

The anotar battery circuit, (Fig. 7.)-Cur ront flows from the battery I by way of, the feeder 49 to the motor 42 and to the contact (Fig. l) and from here, when the lever arm 117 is depressed, by way of the contact 52 and the feeder 49 connected thereto bach to the battery I. It the lever arm 17 is not depressed .the motor battery maincircuit is open. As this is thecase in the receiver, in which the lever arm 1.7 is depressed an ad f litional circuit must be provided for each motor battery I, which circuit is disconnected in the transmitter for the time being, in which the main circuit represented in full lines is operative, but is closed, however, in l the receiver for the time being by means of the line relay of the receiver' to be operated by the transmitter. y

The part of the shunt circuit going from battery I tp motor 42 is common for transmitting and receiving. The conductor 56 goes'froln the motor 42 to thecontact 57 of thc contact lever 58 of the line relay. In the position represented in Fig. 7 this lever is retained by the hook 59 and its contact 57 is prevented from contacting with, the contact 60, from'which the return conductor 56 goes to the battery I. When the hook 59 IUI releases the lever 58, the spring 61 ulls the latter against the Contact 60 and c oses the shunt circuit of the motor battery. I. The lever 58 of the receiver is released by the transmitter when the line battery circuit is closed, whereupon the electromagnet 62 of the line relay of the receiver is energized and attracts the lever 63 carrying the hook59.

to the pot-shaped magnet 38 (Fig. 4), thence` through the axle 27 and the pointer 23 to the brush 26, through the contact plate 21 con` y tacted for the time being bythe lattelgtll `.vire 22 connecting this plate`with the corr-e5 spending contact plate 12 of the. upper contact comb (Fig. l), the corresponding prong its key-lever 2 to the common shaft 1.'

F or the sake of clearness, in Fig. 8 the axle 27 is representedY a second time out of its proper position which is coaxial with themagnet The feeder 64 connects the other pole o'i the clutch battery II with the lowerV contact, comb 14. When a key is struck, i. e'. cnc of the keylevers 2 is depressed, a. g. the lowest in Fig. 8 corresponding to t'hat at the extreme right-hand of the typewriting machine, its prong 3 leaves the appertaini Contact plate l2 of the upper contact coliig and abats against the corresponding prong 14 o the lower contact comb. In this man ner the main circuit of the clutch batter II of the transmitter is closed by way of al the contact plates 2l ot the disk 20 contacted forV the time being by the brush 26 with the ex- .ian l lessees ing to the depressed key-lever Q, that is tov .say7 the current flows from' the battery ll through feeder G4, magnet 88. axle 2?, pointer 23, the Contact. plate 2l contacted for the time being by the brush 26, wire contactl plate l2 of theA upper contact comb. prong 2l, key-lever 2 to the common shaft l` and Vthence by way of the depressed key-lever 2 and the prong 14 of the lov-ver Contact comb contacted by this key-lever back to the hattery ll. Consequently, when a hey-lever is depressed. the pot-shaped magnety 58 is energized andthe pointer 23 thrown into engagement with the motor shaft eti., The

pointer consequently lrotsntes over the contact plates 2l intil it contacts only with that one whose upper Contact. plate l2 is not connected with the axle owing to the 'hey-lever 2 being depressed.- At this moment the rnain circuit of the clutch battery is opened, the magnet. no longer energized releases its armature 32 which is at once locked the teeth 86 and retainsI the pointer 23 on the Contact plate 2l in question corresponding to the depressed key-leven] Vllhen the latter is released it moves away from the prong lst of the lower Contact comb, consequently breaks 'the connection between the latter and the its prong 3 connects its `Contact plate l and the shaft l, and thus prepares this connection for the. passage of the pointer 23 when another ltey-lever is depressed. The depression of key-lever 2 consequently fulfils two duties in the transmitter: it closes the main circuit 'ot' the clutch battery for coupling the pointer but breaks this connection at that contact plate l2 which corresponds to the delpressed key-lever and thus to the contact plate 2l on which the brush Qis to remain stationary. This operation is repeated whenever any key-lever is depressed in the transmitter. rThe pointer Q3 of the receiver u ist move exactly in the saine manner. e. synchronously. as long as the pointer of the transmitter moves, and its brush must remain stationary on that Contact plate .21 of its disk 20 which corresponds to that contact plate 2l or' the disk 2O of the transmitter? on which the brush of the transmitter remains stationary, in order'that the corresponding lreylever possessing the saine type, may be depressed in. the receiver by means 'of the hereinafter described Writing battery circuit. Now as each station is to be usable both asl transmitter and as receiver,

vbut as in the receiver the magnet 38 cannot be\eiicrgized by its clutch battery main circuit for the purpose or' coupling the armature 32 and with it the pointer 23 with the motor shaft afl. because in the receiver the zipper Contact comb and its contact plates 12 are moved away from the key-lever prongs .3, l: provi for the circuit ot the clutch battery an additional branch which becomes operative tor the time being only in the receivtny in order to be able to energize the magnet an or' the receiver corresponding to that ot' the. transmitter by means of the latter. To this end, a conductor G5 connected tothat. pole of the battery H which is connected with the lower contact comb li leads to the fulcram or' the lever 63 (inentionet. above in the description of the motor circuit) whose contact 55 is normallyy prevented by a spring 'from eontactingvitli a contact (3Ti from which tile conductor G5 leads to the magnet 38 and from the latter, by Way ott the part ot" the line't connnon for transmitting and receiving, to the other pole of the. battery ll. This second branch of the clutch battery circuit comprising the conductor mnst be interrupted when the/station, in question operates transmitter7 be canse otherwise the pot-shaped magnet 38 would be constantly energized and the transmitter pointer would continuously rotate when the motor 42 started.

lflvhen the station is to operate as receiver, the leverl @Bis attracted by the electromagnet oit the line relay energized in the manner described hereinafter, and the clutch shunt-circuit, ot the receiver is closed owing to the contact of the lever G3 contacting with the contact 67. Consequently, by correspondingly energizing the line relay of the receiver by means of the transmitter, the clutch shunt-circuit 65 in the receiver can be opened and closed corresponding to the clutch main circuit of the transmitter. that is to say the pot-shaped magnets 38 of both stations can be simultaneously energizefl'or kept currentless and the clutch battery Il in the receiver can be automatically cut ontJ of circuitat'ter use. rEhe interruption of the clutch shunt-circuit at the contact GT thus serves in the transmitter for the time being Jfor disconnecting the conductor (l5 entirely. but, in the receiver, for disconnecting the magnet 38 Jtrom .the armature 32, independently of the-movement of the key-levers,

l'he circuit or the writing battery lll opcrates for the time being only when receiving. To this end, the contact'platesl are i moved away from the prongs 3, by tilting the upper contact comb, and' Contact lwith .(F ig. 1) under the'y ke -levers the prongs 4 of the solenoid comb. As men tioned abo e, each of the latter prongs is connected by a wire 6 with a solenoid 7 The wires 24 going from these so enoids, with the exception of that of the terminating key, unite as mentioned above, in one common metal member 25 from which a feeder 68 leads toy which the brushis stationary, Wire 22 t0- the corresponding contact plat/e 12 of -the upper contact comb, to the appertamlng pron 4 of the solenoid comb, wire 24, metal .mem er 25 to the battery Il. Consequently,

y that solenoid 7 is energized, for the purpose of depressing the appertaining key-lever 2, on whose contact plate 21 the brush 26 remains stationary, when the armature 32 is released, and is connected into the circuit 68. 1f the brush 26 remains stationary on cuit at the contact 47.

the contact plate 21 corresponding to the terminating key S1, the circuit goes from t-he solenoid 7 of the terminating key to another electromagnet 69 of the line relay (Fig. 7), thence to the fulcrum of the lever 58, the

varm of the latter carrying the contact 54 which, when the lever 58 is released by the hook 59, contacts with a contact 7 0, and

from the latter by way of feeder 71 back to the battery lll'. As soon as the armature 32 is attracted by the magnet 38 owing to the' action of the clutch circuit, the lever 46 is released from the contact 47, so that the writingr circuit is interrupted. In the transmitter, the contacting of the contact 47 by the lever 46 of the local relay is unaccompanied by any action, because in the transmitter the upper contact comb isnot in contact with the solenoid comb and conse quently thewriting batterylll is disconnected. Consequei'ltly in the transmitter,

the local relay has only the one, but ex 'ceedingly important purpose of bringing the lever 46 into contact with the contact 48 of the line-relay circuit whenever the armature 32 inattracted, in order to negative the breaking of this circuit in the transmitter only whenever a key .is de pressed and to close the circuit again after the release of a key, in other words to influence tlieline relay of the receiver correspondingly. In the receiver, on the contrary, the local relay operates solely for closing and breaking the writing battery cir- These operations of the local relay in the transmitter on the one hand and in the receiver on the other hand 6 i Losa-ies will. be clearly understood from the following'4 description.

The Zine relay and its circuit, (Fig. 10.)- The arrangement of the parts of the line relay relative to the various batte? circuits Athe circuit. As only the line relay of the typewriting machine operative for the time being as receiver is actuated and controlled by the local relay of the transmitter, in order to close and open the clutch circuit of the receiver corresponding to that of the' transmitter, the connection of the line-relay circuit must be such that the line relay. of the transmitter for the time being is disconnected, its local relay however connected in circuit, while the local relay of the receiver for the time being is without inuence on the line relay circuit, is disconnected,` whereas the line relay is connected in circuit. The local relay must bc located in the line-relay circuit because the machine op crates sometimes as transmitter and at other times as receiver.

When the electromagnet 62 .of the line relay of the receiver interpolated in the linerelay circuit becomes energized, the armature arm 63 is attracted and closes the branch 65 of the clutchveircuit at 67; the hook 59 of the armj63 simultaneously releasesthe" lever 58 which is brought by the s )ring '6l on the one hand into contact with the contact 60 and thereby closes the branch 56 of the motor circuit at the receiver and, on the other hand, rests against the contact 70 and thereby prepares the terminatingkey branch 71 of the writing circuit in order that when the branch 26 remains stationary on that contact plate 21 which'is connected in this branch and corresponds to the termi nating key, the electromagnett) may be energized, attractjhe lever 58 and thereby interrupt the mot-or shnnt-circuit. As soon Vas the electromagnet 62 becomes currentless, which occurs whenever the localrelay lever 46 of the transmitteris moved away from the contact 48, that is to say whenthe armature 32 of thevltras'mitter is released by its magnet 38, the Varmature arm 63 returns into its rest position and thereby opens 'the clutch shunt-circuit in the receiver. The

motor shunt-circuit and the writing circuit of the rece1ver,however, remain connected until the electromagnet 69 is also energized and the lever 58 snaps beh-ind the beveled head 59. This takes place only when the `terminating key is depressed. The connection of the-linerelay circuit varies according as one wire and the earth, as in telegraphy, or two wires,as in telephony, are

insonne tion (Fig. l0) is as follows: ln the transmitter, the lever l? is so placed that; the Contact 19 yis in an inoperative position, 'a'. e. away troni the contacts 50, 51. This Joosition ot' the lever is obtained -when the clutch inain lo circuit is closed and the writing circuit opened. The elastic cont-acts 5G, 5l contact one another. .ln the receiver, on 'the contrary, the lever l? is in its operative position when itscon'tact 19 vis oetvveen the contacts i5 50, 51 and has nioved theni apart..

ln this event, however, the contact 19 has its conducting half against contact 50, so that the lever 18 is connected by Way oif the connecting wire 72 olf the two contacts 50 hy 20 Way of the Contact 19 with the Wire fvvliich leads by way of the electromagnet 62 of the line relay of the receiver to earth at E. .ln the transmitter, the conductor '.73 of the line relay is of course likewise eartlied, namely in the illustrative embodiment .at e. From each contact 51 a wire 7e leads to the 'Contact i8 of the local relayend from the trilt-,ruin of the lever 46 oi this relay to one pole of a line battery lV Whose other polo is eartlied 3o in the receiver at E' and in the transmitter at e. Current cannot flow from earth E to earth E because, even when the lever lo of the local relay oit' the receiver is attracted, z'. e. connects the tivo parte ot the conductor 74 at 4S, the insulated part ot the contact l) prevents an electrical connection being ess tablished between the contacts .Ti and 5G.

.. The local relay of the receiver is thus disconnected from the line-relay circuit. Current e0 cannot however liovv from earth l to earth c because in the transmitter the contact l) has swung away from the Contacti 50. (,lonse- .qnentlyy the line relay of the transmitter is distonnectedirom the linorelay circuit. On

the other hand, whenever' in the transmitter the armature 39. is attracted hy tlie magnet l i 'i .l .38 and drives the lever lo ot the local relay against'tlie Contact 48, cnrrentcan flow from earth E to earth e', battery lV, conductor 74, contacts 50, 51 in the transmittenline 72, contact 50 in the receiver, conductor T-l and back to earth E. Consequently, the line relay of the receiver is connected by Way ot' the local'relay of the transmitter into the 5.5 linefrelay circuit.

ltvwill he readily understood that when the parts played by the transmitter and receiver are to he exchanged, hy introducing the lett-hand contact 1S) in Fig. l0 hetivcen n0 the contacts 50, 5l andhy removing the ,right-hand contact- 19 in, Fig. l() troni the contacts 50,-51 a path orhtlie current of the line-relay circuit is prepared from earth e to earth E', namely from the one pole of the sie right-hand battery IV in Fig. l0 by Way ot' ,tirets .32,

conductor 74, lever etti, contact lS, conductor T4, contacts 5l, 5U (right-hand), line T2, contact 50 (left-hand), Contact 19, lever arni 19, conductor i3, earth c, earth l to the other pole ot .the battery lV. 'ln Fig. ll), the lino T2 marked with cross strokes is operative in any event, and the dotted lines sliovvv the disconnected, and the ull lines the connected, c. operative, branches of 'the circuit.

tric conductors' represented in full lines oe corne inoperative and those represented in dotted lines become operative.

1iWhen two stations are connected as in ustv described, but in this event the eartliiiig ot each line battery and of each line relay omitted. Instead tliereol, the pole in question oi the line battery and the wire 73 of the line rela y .of each station is connected with a contact 75, and the contacts 75 are connected. by the second long-distancelline To, as shown in Fig ll. ln the case o Wireless connection, tho two stations musthe provided with the requisite transmitting and receiving appaiatnses.

la y apparatus operates as follows: `When not-in use, all the typewritiiig machines arranged 'inthe above described manner are set 'to receiving in order that any desired typewriting machine can be operated, Withont the aid of an operatonby any other indiu vidnal machine, it' necessary after connection hy means of a central station or change 'for Writing at a distance. In order to bring this about, yz'. e. to be able to use the machine as transmitter, by depressing the starting ,y A? upper contact conih is tilt/ed. over toward the prongs The upper contacts 'l2 cont ct with the latter; the, leve-ravin l?" is depressed and' closes in the transmitte' the niot-or circuit at the con- 'l`l1e motor con'niicnces` to rotate and rotates the niagnet Pn. .it the saine tiiiie as the lever 1T. 1?', is rocked, the contactv l5) is removed trom the coiitacts 50. 5l. the line relay in the ti'aiisniitter is conse.- vquently disconi'iected troni the line-battery circuit, the local relay on the contrary 'connected into this circuit, that the linerelay of the receiver is connected hy way of the llocal relay of the transmitter in the circuit ot the ,line hattery. (Figs. 10 and ll), B v depressing the startingy kev and in cmisequence oit' the other keys .requisite tor writing at a distance being depressed. the prongs il ot the latter contactwith the lower Contact coinh la whereby the clutch battery is connected in circuit. (Fig. 8). Jrating magnet 38 ot' the transmitter thus hecoines energized and attracts its armature 32 which also rotates and rotates the pointer il?, whose 1orush conseqnentlv slides on the con tacls .21 ot the disk 20. Owing to the arman ln the event of transmitter and receiver changing the parts played liy-tliein, y

The rotelephony the connection is similar tn tliatv local relay o the transmitter closes the linev relay circuit broken at this place only (Figs.

10 and l1 full lines),- the electromagnet (i2` lof theline-relay of' the receiver' is conse` quently energized and attracts the lever G3,

,Whose head 5S) releases the. lever 58. Under the influence of the spring 61, the lever 58 closes the branch 56 of the motor circuit of the receiver at the contacts 57, G0, and also the contact 54 of this lever closes at the contact 70 the terminatingkey branch 71 of the writing circuit of the receiver, While the ctact 55 of the arm G53 closes at the contact 67 the branch 65 o fthe clutch. circuit in the receiver. Owing to the motor shunt-circuit of the receiver being closed its motor audits magnet" 38 rotate. By closing the clutch battery shuntcircuit of the 'receiver in conf sequence of a key being depressed at any time, the magnet 38 of the receiver is en# ergized, attracts its armature 32 and rotates .the pointer 23 with its brush 26 over the cone tact plates 21.

As described above in the detailed de-4 scription of the clutch circuitfwhen writ ing onA the transmitter machine, as soon as .the brush 26V arrives at that contact plate 21 which corresponds to the depressed key, the

clutch circuit is broken, and the armature 32 is released by the pot-shaped magnet and at once locked. The brush 26 of the transmitlter therefore remains stationary on the contact plate correspondingl to the depressed key. In the receiver, however, the brush 26 must also remain stationary on that contact plate 21 which corresponds to Ithe key to be depressed which, on itspart, must be identical with that depressed in the transmitter. This is brought about by the lever 4G of the local relay of the transmitter moving,r away from the contact 4S of' the line-relay circuit, when the armature 32 is released in the transmittel', and breaking this circuit. The electromagnet' G2 of the line relay of the receiver thereby becomes currentless and the spring (3G pulls the arm (3?: into its rest position, when the contact is removed from the contact 67 and interrupts the clutch eircuit of the receiver. Consequently, the potshaped magnet. 3S of the receiver is also rendered currcntless and releases its armature 32 which is at 4onceloclred, so that the brush 26 remains stationary on the same contact plate 21 as in the transmitter.

lVhile the armature 32 ot the receiver is being locked, the disk 33 of the local relay of the receiver releases the lever 46 which, pulled by the spring 45, contacts with the contact 47, whereby. the Writing circuit `in the receiver is closed by way of that contact plate 21, on which the brush 2G has remained stationary. The solenoid 7 under thefcorresponding lteydever becomes energized and attracts its core 8 and the key-lever. The

typewriting machine of. the receiver con sequently prints that type, `whose key has been depressed n the transmitter. The startin key A1 has no solenoid 7 because otherwise, when depressing the same in the transmitter, it would be depressed also in the receiver, which must not occur because otherwise the starting key-lever of the receiver would press on the lever 17,` 17', that is to say would tilt over the upper contact comb toward the key-lever prongs 3 and thereby set the machine occupied 1n receiving to transmitting. Obviously, in the transmitter the key-lever must remain depressed at least until the brush 26 has arrived at the corresponding contact plate, because otherwise the clutch main circuit of the transmitter would be broken at the lower contact comb 14, the potLshaped ma t 38 would consequently become current ess too soon and the brush 26 would remain stationary on an incorrect Contact plate 21. Likewise, the prematurely operating local relay of the transmitter would disconnect the linerelay of the receiver too soon, so that the clutch shunt-circuit would be prematurely interrupted there also and an incorrect type would be written. When high speed mo tors are used, however, the time required by the brush for traversing the longest distance, rather less than a complete circle, is very short.

It is assumed that the tvco motors in the transmitter and receiver run synchronously, and consequently that the two brushes 26 move synchronously, because they simultaneously begin to slide from the same places, describe equal arcs and cease movingY simul taneously. Consequently, they will always remain stationary on the contact plates appertaining to similar characters. Now, as is well-l nown, perfectly synchronous rotation of two like electric motors cannot be obtained, and in consefpience ot the inequality the pointers 23 in the transmitter and receiver would not describe equal arcs in unit time, and therefore would not remain sta tionary on the same contact plates 21. The apparatus wouldconsequently be mlusable. This disadvantageolls influence ot the unavoidable. inequality in the speeds of the motors is here negatived., however, by thel above-described armature locking-device. As mentioned above, when the rotating brush 26 is stopped it remains with its center over the middle line ot that contact plate 21 which is opposite the tooth gap entered by the toot-h 34 at the moment of the pot-shaped magnet 38 becoming currentless, and the point of the tooth 3ft is then 'located at the deepest part 37 of this gap. The pot-shaped magnet 238 becomes currcntless in the transmitter as soon as the brush 2G contacts with the con; tact platecorresponding to the depressed key. Now if for the various ty pevvritiln,r matestes@ chimes belonging to one central 'stetion or exchange motors are employed Whose speeds fluctuate between 1985 andQOl revolutions per minute, end consequently have ct most u difference of revolutions per 200011570 revolutions'per minute., and it' this difference per cent.v per minute is et most not more than half'the breadth of one Contact. plete in de grecs relatively to 360 degrees, e. g., in the ceseof thirty-six contacts eechzlOO7 the heltz", i. e. about l{% of 36Go, unequal eres of the brushes in the transmitter und receiver are automatically equalized into equally long' eres when the brushes remain stationary. o

'The are described by the brush 26 ot the transmitter in no caseembreces more then thirty-five contact plates 2l, thus at most- .360. The are described by the brush of the receiver is at most l.}% larger or smaller. In the transmitter, the armature 3Q or" vthe pot-shaped magnet 38 is released and drawn away by the spring "31' es soon es the brush 26 contacts with the Contact 'plate 2l corresponding to the depressed key, the point of the tooth 34 arrives into the middle line of by the point of the tooth of the receiver',`

the tooth gon and the middle oit the brush is on the middle of this contact pletelcie'. o). is the are described by the point 'of the tooth 3e in the receiver is et most i957@ in degrees larger or smaller thon that described he point ci' the'tootli of the receiver will. he located to the right or left ci tle middle line of that tooth gap *.vvliiclicorresponds to the contact plete of like desitgnot'on. But ss this deviation to, the right orleitis less than half the' distance between the two locking' teeth 35 of the tooth grip5 however; es soon es the erinsture is ietrected from the potshuped meg-net the point of the ltooth Sie' in the receiver will always enter into the tooth. gzip analogous to that in the transmitter. The point ci vthe tooth 34 must, lidiw ever, always arrive et the deepest. part 37 ol' the tooth grip, and consequently, in the receiver the crush Q6 remains stationary with its middle over tieniiddle line of Athe Contact plete 2l 'in question, that is to say both the brushes always describe equal arcs and always start from corresponding places. After the brush 25 in the transmitter has once arrivedA et that contact plete 2l which corresponds to the depressed key, the release und upward motion of the lreyLlevei-cuuses the prong 3V to Contact with its upper, contact 12l in order to connect. that plete 2l electrically ,with the shaft l, on which the) brush 26 had previously remained station. :Lry,' when another key is depressed and the brush 2G rotates.V YVhen writing et u distance is Finished, the terminating key S1 in the transmitter is depressed, whereby the upper Contact comb is tilted over toward the solenoid vcoinb und the mccliine is sct'z'eedy tor receiving. Be- .fore this occurs, however, asthc lest stepv 1out one. the terminating key of the receiver is drown downward in like manner as in the cese of the other .keys and indicates the terininzitionot the Writing from a distance for the time bei The eleotromagnet 69 (Fig. 9) is. energized sind attracts the lever 58 which' posses the slenting head or" the linereluy lever 63,? slightly raising tlie same7 und breaks the motor s liuntcircuit, between the contacte 3T and 60, end else breaks the terminating-key lorencli ot 'elle 'writing circuit in the receiver between ,the contacts 5e and 7l). The clutch shunt-circuit lies shortly lieore been opened by interrupting' the linerelay circuit by Ineens o the locsl relay of the trenemitter. Consequently, in the machine which has-been used as receiver ell the batteries l to lll remain at rest, and battery il? in the receiver is also disconnected. In the transmitter, owing to the upperfoentact comb lieingtilted this comb movswout of the renge of the key-lever prongs 3, so that the circuit oit the clutch battery ll cannot be closed ey wey of them. Also, the Contact 52 ,moves sway from the contact 53, so that the motor resin-circuit broken, sind, lastly, 'the contact le enters between the contacts 5G, 5l in order to piece the line battery lV of the transmitter rest-end to prepare the longdistence circuit crtlie line relay of the -by the transmitter.

ln conclusion it nitty be explained how the uneycidable delay in the attraction of the armature or if the line-reley lever G3 of the receiver relatively to that of the like parts int-lie transmitter is equol1sed, in

order to overcome .the non-synchronous motion or' 'the brushes occurring owing to both this uneven operation of the scid parts sind the reterded stort-ing of the motor of the receiver. "lliis is brought about by the contacts e the loool relay and 55 in the line relay being sliding contacts or, es shown in Fig. e, hush contacts, e. contacts which, after they here been contacted by the lever coecting with them, follow the motion of the lever Iwithin certain limits in both direc-y tions. Theselimits are determinedy cthe following formula i ell-o--c=lolc1 i when '.121 designe'es the period duriug'which the crush of the receif'erruns; the period during which the brush of the transmitter runs: o the time during which the armature 32 when attracted by the pot-shaped magnet;

runs toward the lutter Without the lever Lil-G CIJ contacting with its contact; c the time during which the lever 63 of the line relay moves under the action of the cltxtromagnet (3Q Without contacting its Contact; fz the time duringr which the armature 32 is withdrawn by the sprii'eg zl'l from'the magnet 3S while 'the lover 4G is making Contact, and, lastly,

ci the time during which the lever (i3 of the line relay is drawn away by the spring 66 'from the electromagnet 6:2 while making contact. Tbovalue cl may, in certain cases, be zero. As the arcs which the brush 26 of the, transmitter' traverses during the time .fr and that of the receiver duringr the time m should be equal, the time a' and a" must also be equal. Consequently, in the formula bal-f: on the one hand and also a+@ must be equal. This is most readily obtained when the time a, is made equal to b andthe time c equal to c1.

lin order that the times a, and b may be equal, the paths traversed in the ,same by the lever 4G must be unequal, to wittbe path traversed in the time 7, must be greater than the path traversed in the time a, because the path traversed in the time t) takes place under the attraction of the pot-shaped magnet 38 `which is necessarily stronger than the tensile force of the spring 31, under whose action the path traversed in the time o takes place. For the same reason, the path traversed in the time e must be greater than that in the time c in order that the times c and c1 maybe equal.. In order that the arcs described .in the times a: and ta may be equal, the time a equal to Za` and the time c equal to c1, lf proceed as follows: The tensile forces of the springs 3]. and 66' are.selected as little as MJossible less than the attractive forces of tlie electromagnets 38 and (r2, respectively. Thepaths traversed during the times fr and l are then made equal, and the pot-shaped magnet 38 of the receiver is connected into circuit directly by Way ot the local relay of the transmitter. It

is seen that .r1 is greater than a. This proves that the time a or the path traversed during the same is too great.. Therefore c is very gradually diminished until alla-.00. The magnet il@ of the receiver is then connected into circuit by Way of the line relay of the receiver and the latter by way ot the local relay of the transmitter. lt is now :t'ound that the arc described. in the time all again `greater than that described in the time which proves that the time @+o is smaller than the time a+# and that, as Z1, .is equal to n., the time c is shorter than cl. New in order that the times c and ol may' be equal, the path traversed in the time c must be increased. .l`his takes place quite gradually until the are for the time .r1 is equal to the are ltor the ti me a'. The time c is now also' equal to the time cl, because the `path traversed in the time o isgreat/er than that traersed in the time c1.

It is to beunderstood that nothingherein contained is to be construed as limiting my,A

parting from the true scope ofthe actual4 invention as defined in the following claims.

I claim z 1. Apparatus usable both transmitter and asv receiver for intercourse between typewriting machines at 'a distance, comprising at each stat-ion a driving means, a Apart driven thereby, stationary contacts corresponding in number to the type keys, a part Vmovable over said stationary c ontacts, an electrically operated clutch mechanism for coupling and diseugaging said two parts at the receiver u niformly and for `an equally long time as at the transmitter, an electric circuit including said types,said clutch mechanism, said movable part and saidstatiouary contacts, contacts operated at the transmitter by actuating al key for closing and interrupting said clutch circuit, a line circuitl connecting the transmitter and receiver, a contact member operated by the coupling and disengaging movements of said mov-able part at the transmitter for closing and interrupting said line circuit, a Contact means in the clutch circuit moved atthe receiver by operating said linecircuit' for closing and interrupting said clutch circuit sunultaneously and aualo gously as at the transmitter and means elec trically operated by said contact member at the receiver for actuating the lrcy corresponding to that-actuated at the transmitter.

2. Aiqiaratus usable both as transmitter and as receiver for intercourse between tyueuriting machines :it a d' prisiug at cach station a driving means, a part driven thereby, stationary contacts corresponding in number to tl'letype keys all of which are electrically connected, a part movable over said stationary contacts, an electrically operated clutch mechanism for couplingr and discngaging said two parts at the receiver uliit" nnily and for an equally long time as at the transmitter, an electric circuit inclurjling said keys, said clutch mechanism, said movable part, said stationary contacts and an equal number of con; tacts connected therewith being touched t ,the transmitter by the type keys only when tliey are not actuetei, a contact in the path. of each key toucbeii by actuating a ltey for cl'osing-atltbe ytransmitter said clutch cir- "cuit which Vie automaticaliy interrupted,

when the movable part arrives at that stationary contact, which corresponds :to and is out of coirmectionl witii the actuatc key, aline circuit connecting the transmitter and receiver, a contact member operated by the couplingand discngeging movements et saicl movable part at'. the tranmitter for closing and interrupting saici line circuit., a ccntact means in saifl clutch 'circuit moveci at the receiver by operating said line circuit for closingl end interrupt-iiig4 said clutch circuit simultaneeiiely anti analogoiisy as at. tlie transmitter and means eiectricaliy operated by' said contact member at tbe rccciver oractuating the type'ley correspcnting to that actuated et tbe transmitter 3; IApparates usabie both as transmitter and as ri-:c'e-iver for typewriting macbinesl comprising at eacb an eiectromotor, a motor battery circuit, part driven by electromotor When its circuit is ciesai, stationary contacts corresponding in number to tbe type keys, contact ineens each eiectriccliy connected with one 'of said stationary contacts andl adapted to bel 'brought in contact 4at the transmitter with the corresiionding type ltey in its not actuated position, 'all keys being -electricaily coiiinccteni,V a para movable over said'v stationary contacts, an electri-caliy operated clutch mechanism for coupling and disengaging said tivo parte at ythe receiver uniformly and for an eciieily long` time as at the transmitter, electric clutch circuit, a contact in the pat-n of each key, touclfietl by actuating a ley for dosing at. the transmitter said clutch circuit, which is automatically interrupted when said movable part arrives at tbat stationary Contact corresponding to and being out of connection with the actuated ltey, a line circuit connecting the transmitter and receiver, a contact member operated by tbe coupling unil (liseiigaging movements of' sait?! mov- Y'sziiil contact memberat the receiver for actuating 'tbc type key corresponding to that which is actuateclat the transmitter.

4. Apparatus usable bot-li as transmitter and as receiver for intercourse between 'typewriti'ng machines ata distance, comprising' at cach station an electromotor, aniotor battery-ciicuit, apart moveil by said .electroiriot'ii when its circuit is closed. stationaiycoiitacts corresponding in number to the intercourse betweenI type keys, contact means each electrically connected ivitb. one ot said stationary con' toets and adapted to be brought in Contact at the transmitter with the corresponding type key in its not actuated position, a contact in tbe petti of each actuated key, a part movable over said stationary contacts, an' clectricaily operated ciutch mechanism for' coupling; and disengeging saicl tivov parte, a. clutch circuit for esiti coupling means operated at the ,transmitter by actuatinga key,

a Contact member actuated by the coupling movements of tbe movable part for closing at the transmitter a. `line circuit connecting'V responding to that which is actuated at ltlie A transmitter, motor battery circuitlaaving two branches, branch with e. contact operated at tbe transmitter for ciosing said main branch at tbe starting and for interrupting et tbe end of the Working .and an aci'it-ional branch with a contact held in interrupting position at the transmitter, the circuit of the iine relay at tbe transmitter being interrupted by a contact means moved apart, Wbile at tbe receiver the contact of the main branch oi the motor battery circuit is in interrupting position 'and the contactof tbe aciitional branch is releaseii by tbeiinc rei'ay or tbe receiver, Whose circuit is' close-ifiE at tbe transmitter by tbe contact member beingfopcrated at the tirs-t coupling .of

tii-e'inovabie peri, with the moved partb 5. Apparatus usable both as transmitter and as receiver for intercourse between type- Writingg machines at a. distance, comprising at station an electromotor, amotor bat-Y L tory circuit having; tivo branches with contects, a moved by said electromotor when said branches are closeii, stationary conta-cts corresnoncling .in number to the type keys, a part movable over said station-- ary contacts,an electrically operated clutch iio" mechanism for coupling and discngagiing said two parte, the transmitter by actuating a l ey,'a contact member operated by the coupling and ilisengaging` movements of said movable parir, a ,line circuit connecting the transmit'- ter` and receiver. and opcrateil attlie transl" mittei' by said cont-act member. a line lay Yin said line circuit, a contactlmeaiis in saio clutch circuit moved at the receiver by ocrating,r said liuc relay for actuating iiie clutch mechanism uniformly at the `transmitter, means electrically operated by said contact member at tlie receiver for actuating tbe saine ltcy as at tlic transmitter, an iiiiicienil aclutcli circuit operated at ent starting key actuated only at the transmitter, anda finish key arranged as all the type keys and actuated at the transmitter, st tlie end of the transmitting, to prepare 'thestation as receiver, the contact in the main branch of the motor circuit being ar` ranged to be closed by Vactuating said starting kev and to 'be placed in interrupted position by actuation of said finish key.

6. Apparatus usable both as transmitter and as receiver for intercourse between type: writing machines'at a distance, comprising at each station an electromotor, a motor battei-y circuit having two branches with contacts, a part moved by said electromotor when said branches are closed, stationary contacts corresponding in number to the type keys, a part movable ovei` said stationary contacts, an electrically operated clutch mechanism `for coupling and disengaging said two parts, a clutch circuit operated at .the transmitter by actuatingr a key, a contact ,tnember operated by the coupling and disengaging movements of said movable part,"

a line circuit connecting the transmitter and receiver and operated attlie transmitter by saidfcontact member, a line relay in said i line circuit, a contact means in said clutch circuit moved 'at the 4receiver by operatin said line relay for actuating the clutc Amechanism uniformly as at the transmitter,

means electrically operated by said contact member at the receiver for actuating the same key as at the transmitter, an independent starting key actuated only at the trans- -mitter, and a 4finish key arranged as all the type keys and actuated at the transmitter at the end of the transmitting to prepare the station as receiver, thecontact in the main branch of the motor circuit being arranged to be closed by actuating said starting key and to be placed in interrupted )osition by actuation of said .finish "key, aline circuit contact which is moved at the transmitter in interrupting Lposition by actuating the start..- ing key and at the receiver in closing position b actuating the finish key; i

7. pparatus usable bothas' transmitter and as receiver for intercourse between typewriting machines at 'a distance', coms prising at leach station a moved part, stationary contacts corresponding in number to the type keys, contacts insulated from4 one another each electrically connected with one of'said stationary contacts and movable at the transmitter for the time being to touch the correspondingtype key all of which and-the finish key are electrically connected but at the receiver for the time being away from said keys, Ya part movable over said stationary contacts, contacts in the path of the actuated keys an electrically operated clutch mechanism. for alternately coupling and disengaging said two pai-ts, a two branch clutch circuit for operating said coupling lcuit closed and interrulitei4 means, a contact. member operated by the coupling and disen faging movements of said movable part, a line circuit operated by said contact member, a line relay in said line circuit, the main branch of said clutch circuit including said contacts arranged in the path of the keys being closed at the transmitter by the actuated ke by way of all the stationary contacts witli the excep tion of the stationary contact corres nding to the actuated key which has left -t ie movable contact connected with` the stations contact, the additional branch of the ciu circuit having a contact means, held at the transmitter in interrupting (position by the line relay bein dener ize while at the receiver the mam branc of the clutch circuit is interrupted b v the movable contacts being moved away rom the keys, and the additional branch is closed and interrupted uniformly as the main branch of the clutch circuit at the transmitter by the line relay operating said contact means of the add1A tional clutch circuit branch at the receiver and means ,electrically operated at the re ceiver by said cnntact member for actuating' the type corresponding to that which is actuated at the transmitter.

8. Apparatus usable both as transmitter and as receiver for intercourse between typewriting machines at a. distance, comprising at each station a moved part, stationary con tacts corresponding in number to the type keys, contacts, insulated from one another each electrically connected with one. of said stationary contacts and movable to touch at the transmitter the corresponding type keys, all of which are electrically connected, but away from said keys at the receiver, contacts in the path ofthe actuated keys, a part movable over said stationary mntacts, an electrically operated clutch mechanism for alternately coupling and disengaging `said two parts, a clutch. circuit, a contact member operated by the couplinl and disengaging movements of said movalile aart, a line cirl at the transmitter b said contactniemlicr, a line relay in said ine circuit operated at the receiver forclosing and breaking said clutch cir' `cti-it uniformly as at the transmitter, electromagnets for each of tlietype keys and the finish key,y solenoid-contacts, to which are moved at the receiver the movable contacts connected with the stationar contacts, a writing circuit including sai member operated by the coupling and disengagingv movements of said movable part at the receiver closing and interrupting the writing circuit for actuating the key corresponding to. that which is actuated at the transmitter, l

9. Apparatus usable botli as transmitter and as receiver for intercourse between iois m electromag y. ,nets and said solenoid-contacts, thecODtaet Loss/eee typewriting machines' at a distance', comprisng at each station a moved part, stew tionai'y contacts corresponding in number to thetype keys, contacts, insueted *from one another each 'electrically connected with lone ofsaid stationary contacts and movable vto ,touch at the transmitter the corresponding type keys, all of which' are electrically connectetl, but et the receiver away from seid keys, solenoid-contacts touched :it the receiver by seid movable contacts, contectsin operated clutchv mechanism for alternately' coupling und disengaging sziidtw parte,

n clutch circuit, a Contact member operated' by the coupling and disengsgn'ng inovelnents of said movable part, a. line circuit operatedat the transmitter by seid contact member, o line relay in said line circuit closing and interrupting .ist the receiver seid clutch circuit uniformly as at the'trnnsmittene Writing circuit having two bronches, :i Contact ineens inthe mein branch of seid Writing circuit and operated by seid Contact member, electroniagnets or each of the type keys, including with seid soenoidcontacts in the main branch of the Writing circuit contacts, tbe additional branch of the Writing circuit .including the electromagnet for the inish key, the solenoid-contact, to which is moved tbe corresponding movable Contact connected with its stationary contoot, a; Contact Ineens released by the line relay of the receiver at its first operation and an electron/ie? net, which when excited by actuating the nishkey at the transmitter brings scid released-contact means in it interrupting position, both Writing circuit brsnclies being interrupted at tbe transmit ter by said movcble contacts being moved away from seid soienoid-contocts in the main branch of the Writing circuit, ane the contact means in the additions-i branch being heldin the interrupting 10. Apparatus viible over said stationery contacts, en electricaily operated clutch mechanism' for alternfitely coupling. sind disengaging seid two parte, a clutch circuit, s contsctjrneniber opel-iisd by the coupling: snoly disengeging movements of yseid movable peri, c iin@ position the iine relay. usable both as transmitter :ind as receiver for intercourse between type Writing machines at :L distance, coniprising;`

circuit operated et the transmitter by said contact j, einber, s, line relay in said' line circuitciosinw and interrupting et the receiver'ssid clutch circuit uniformly es et the transmitter, n Writing circuit having two branches, e Contact means in the main branch of seid writing circnitend operated by seid Contact member., electroma-gnets for each of the. type keys included with `said solenoidcontects inthe mein lloiencii;,of the Writing eircuit, Athe additional brsnch'of the ivriting'cir cuit including the electroinognet for the iin isb hey, the solenoid contact, to which is'inoved the corresponding movable Contact connected with its stationery contact, e, Contact means released by 'the line relay oi' the receiver at its iirst operation and unv eiectroniag'net, which when excitedby actueting the finish key et tbe'trensniitter brings said released Contact means in its interrupting position, both Writing circuit branches being interrupted at the transmitter icy-soid-movabie contacts being moved sway from said soie-f noid-contacts in the, mein branch of the ivriting circuit, and the Contact means in the edditionel branch beingl held in the interrupting position by tbe line relay, the Contact earns in tliendtlitionsl branch' of the Writ l ing circuitJ being arranged est. one erin of e.. lever, a, contact on tbe other erin of said lever for closing et the receiver the additional' I.branch or" seid motor circuit when the soddi-A fionel branch of said Writing circuitis closed "end for interrupting et the transmitter these both additional branches.

1l. Apparatus usable both as transmitter and :is receiveror intercourse between type- Wiiting machines at a. dist-ance, comprising et each station :i moved port, stetionziry con tects, Correspendingin number to the type keys, part movable over seid stationery contacts, in electrically operated clutch mechanism for coupling and disenga-ging scid tivo parte, e,- ciutch circuit, s Writing cir- 1 cuit active only t tbe receiver, solenoid-contoets iu the v/ri ing," circuit, movable contacts d-froni one another belonging to each of tbe type keys sind tbe finish hey, all of which type keys are connected by their coin-V Inon asie serving es conductor, each movable coni-net being connected by s. conductorvwith one-tici: stationery contacts, .contacts in the-path each sctneted hey not active at the receiver, seid.'A movable cont-acts being sbitebie, in common et t'netmnsmitter to touch the keys in their not actuated position for preparing the clutch circuit, but 'at thei receiver to touch the solenoid-contacts of the Writing circuit.

l2. ippamtususable both. as transmitter and es receiver for the intercourse between mechanism for coupling sidtwo parts, 'a clutch circuit, a writing cir- 4cuit 'active I'only at the receiver includingl solenoid contacts, movable contacts insulated from one another belonging'to each ot' the type keys and the finish key all of which type keys are connected by their common axle serving as mnductor, each movable contact being'connected by a conductor with one .of said stationary contacts, contacts in the path ofeach actuated key not active at the receiver, said movable contacts being shiftable in common at the transmitter by actuating an independent startin keyf to touch the keys in their not actuate position .for preparing the clutch circuit, but at the receiverby actuating thc finish key to touch the solenoid contacts of the writing circuit.

153. Apparatus usable both as transmitter and as receiver for intercourse between type- ,writ'ing machines at a distance, comprising at each station an clectromotor, a two branch motor circuit, the main branch of which is closed at the 'traivismitter by actuating a starting key, a part moved by said electromotor, when one of said branches is closed, stationary contacts corresponding in number to the type keys, a part movable over the stationary contacts, an electrically operated clutch mechanism for coupling and disengaging said two parts, a two branch clutch circ; it operating said clutch mechanism. when one of its branches is closed. contact n.l ans operated at the transmitter for clos iL and interrupting the main branch ot' tl e clutch circuit, a contact member fornr ing a local relay operated by the coupling and disengaging movements of said movable part, a line circuit connecting the transmitter and receiver including said local relay 4and a line relay, a two branch writing cir- 4 cuit, one branch ofwhich belonging to t-he finish key including an electroniagnct, said local relay closing and interrupting at the transmitter the line circuit and at the receiver the additional branclrof the clutch circuit, said line relay consisting of an electromagnet with a lever bearing a contact and a means for retaining a lever belonging to the electmmagnet of the writing circuit being two contacts, said line relay being not active at the transmitter, but its electromagnet being excited at the receiver by the movements of said contact member at the transmitter, whereby its lever is attracted and released, whose contact closes and interrupts the additional clutch circuit branch uniformly as the main branch is operatedA at. the transmitter, the line relay lever when at firstattiacted releasing the lever of the electromagnot of the writing circuit branch, Whose one contact closes the additional mot'or circuit4 branch, while the other Contact prepares the additional writing .circuit -ary contacts, yan electrically operated clutch branch, which when closed by actuating the and dlseng'aging g limsh lt'cy at the transmutcr excites its elec tromagimt attracts its lever and interrupts the additional motor circuit; branch and the additional writing circuit branch at the receiver. t

14. Apparatus usable both as transmitter and as receiver for intercourse between typewriting machines at a distance, com` prising at each station an clectromotor, a. two branch motor circuit, the main branch of which .is closed at thc transmitter by actuating a starting key, a part moved by ,said elcctromotor, 'when one-oil said branches iS closed, stationarv contacts coriesponding in number to the type keys, a part movableover the stationary contacts. an electrically operated clutch mechanism for coupling and disengaging said tivo parts, a tivo branch clutch circuit operating salu clutch mechanism, when one of its branches is closed, contact means operated at the transmitter for clos ing and interrupting the main branch of the clutch circuit, a, contact member forming a local relay operated by the coupling and dis-engaging movements of said movable part, a line circuit connecting the transmit- `ter and receiver including said local relay and a line relay, a two branch writing circuit, one branch of which belonging tothe fin u ish key including an electromagnet, said local relay closing and interrupting at` the transmitter the line circuit and at the receiver the additional branch of the clutch circuit,

said line relav consisting of an clcctromlg- "o net with a lever beari a contact and l means for retaining a ever belonging t0 the electromagnet of the writing circuit bearing two contacts, said line relay being not active at the transmitter, but its electro# "5 magnet being excited at the receiver by the movements of said contact member at the transmitter. whereby its lever is attracted and released, whose contact closes and inter rupts the additional clutch circuit branch llo uniformly as the main branch is operated lt the transmitter, the line relay lever when at first attracted releasing tbe lever ofthe electromagnet of the writing circuit branch,

whose one contact `closes the additional mO- |15 tor circuit branch while the other contact prepares the additional writing circuit branch, which when closed by actuating the finish key at the transmitter excites its electromagnet attracts its lever and interrupts main branch of the clutch circuit moved 180 piece of the main 1:5

Losanna v circuit and to interrupt the -mainclutoh circuit, the contact'piece on the switch4 being at the same. time moved apart to interrupt the mainfbranch of the Amotor' circuit for preparing the station as. receiver, while fby* actuating 4the starting key at the transmitter the contact-piece on thcswi'fch closes the main branch lo the motor circuit and the half conducting contact means releases the elastic'contacts to interrupt the line circuit and to close the main branch of the clutch circuit, the `actua ofthe finish or starting key preparing at the same time the'wr'iting circuit at the receiver or interrupting it at the transmitter.

15. 'Apparatus usable both as transmitter and as receiver for intercourse between typewritingmachines at a distance, comprising at each station a moved part, stationary con# tacts,.apart movable over-,the stationary contacts, an electrically operated means for coupling and di engaging said two parts, a ciutch circuit, a Contact member moved by the couplin and disengaging movements of saidrmovab e part, a line circuit connecting the transmitter and receiver, a line relay Vin said line circuit operated at the receiver by said contact memberrat thetrans'mitter, the

contacts 'actuated by said contact member y being formedas adjustable sliding or brushcontacts for the purpose of obtaining at A both stations an equal time of the connection of the movable part with. the moved art; f P In testimony, that I claim the foregoing as my invention, 1 have signed my name in presence of two subscribing witnesses.

' H; EMANUEL MQ SCHNURER.

`Witnesses:

WOLDEMAR HAUPT, HENRY HAsPER.

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