US1107365A - Printing-telegraph. - Google Patents

Description

C. B. SCRIBNER & F. R. MUBERTY. PRINTING TELEGRAPH. APPLICATION FILED MABUIB, 1911.

1,17,365B Patented Aug-18,1914;

3 SHEBTS-SHEETL F W a n m/I egy a ll 6} I I G. E. SORIBNER & F. R. MOBERTY.

PRINTING TELEGRAPH.

APPLEATION FILED MAR. 6, 1911,.

Patented Aug. 18, 19M,

3 SHEETS-SHEET 2'.

G. E. SCRIBNER & F. R. MOBBRTY.

PRINTING TELEGRAPH.

APPLICATION FILED MAR.6, 1911. 31 107 365 Patented Aug".18,1914

3 SHEETS-SHEET 3.

* n s u a t a on.

CHARLES E. SCRIBNER, or JER-ICHO, VERMONT, Ann FRANK 1a. MQBER'IY, or NEW ROCHELLE, new YORK, assmnons ro wnsrnnn nLEo'rnIo COMPANY, on NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

' PRINTING-TELEGRAPH.

' Specificationof Letters Patent.

Patented Aug. is, iota.

Application filed March 6, 1911. x Serial No. 612,618.

To all wkomc't may concern:

' Be it known that we, CHARLES, E. Scum.-

. mum and FRANK R. \MOBERTYI, citizens of the United States, residing at Jericho, in

- the county of Chittenden and State of Vermont, and Nev; Rochelle in the county of Westchester and State of New York, re-

spectively, have invented acertain new and useful Improvement Printing-Telegraphs, of which the following is a full,

clear, concise, and exact description.

This invention relates to printing telegraph apparatus, and the object is to produce a printed record upon a sheet of paper by the use of a type carrier and a selecting apparatus controlled by two successive direct current impulses, that is, two current, impulses separated by an interval of no each having an armature-stop w ich, when the magnet is energized, projects in the path of the type wheel stop and halts the type in position to print at av common point by the impact of a press pad. The selecting apparatus consists of a local circuit with a series of parallel branches di vided into groups. Each branch contains the coil of a type magnet. I These branches are again divided into groups/ each group composed of one branch from each of the g] first named groups, and the local selecting circuit is first closed through the terminal contact of one group,-and then through a terminal contact of the other group to complete. a circuit through the desired type magnet. When circuit is closed through the desired type magnet the magnet projects Its StOP lIItQtlIG path of the radial arm and th1s contact closes a local circuit which,

first, operatespthe press I pad to printvand then breaks the local selecting circuit to restore the parts to their normal and inactive position. The switches 'for closing the local selecting circuit are electromagnetic and .each such electromagnetis provided with a holding coil which locks'it in its closed position untilreleased as described. Means are shown, and described for spacing between successive letters, for advancing the paper from line to line, for resetting the paper from one side margin to the. other, forresetting the paper from an intermediate point to the paragraph line and for shifting the type wheelfrom one row of type to another. I

Certain features are disclosed in this application which are not claimed herein, but

which are disclosed and claimed in a copending application to F. R. McBerty, Se rial No. 700,767, filed May 31, 1912.

The accompanying drawings illustrate the invention.

Figure 1 is a schematic view of the electromagneticswitches responsive to two successive direct current impulses which may be transmitted through two main lines, the essential elements of the recording apparatus for stopping a type in position to print, for printing, and for restoring the selecting apparatus to a normal condition of rest; Fig. 2- is a, view of the same electromagnetic switching apparatus and the complete groups of local branches each containing a' type magnet; and Fig. 3 shows the essential elem nts of the recording apparatus including the spacing and shifting apparatus with parts of the selecting apparatus not appearing in Fig. 2. It is to be noticed that Fig. 3 is practically a continuation of Fig; 2, and by placing the drawings together circuits may be traced from one figure to the other.

There are shown two main lines L and L leading from a distant transmitting station Z at which the key 500 is arranged to transmit positive or negative impulses over either one or, both of the main line conductors from grounded sources of energy 501 and. 502. At the receiving station are located two polarized relays P and P one in each line, arranged to respond to positive current impulses only; two polarized relays N and N one in each line, arranged to respond to negative impulses only; and a neutral relay Q connected in a ground branch common to both lines L and L This relay responds to currents of either p0- larity in either line. Relay Q controls a movable contact 6 coiiperating with fixedv contacts 43 and 44. Suitable means are provided at the transmitting point for throwing upon either one line. or the other, or both in multiple arc current impulses of an interval of no current. The circuit of line Lfis traced via 1.0, coil 11, coil 12, coil 13 to ground 15; circuit of line L is traced via 20, coils 21, 22, 23, to ground- 15. Pro- 5 vision is made ior causing the contacts of relays simultaneously responding to impulsesin two, lines to engage with each other, as will be hereinafter described. f Each of the polarized relays is provided with a locking coil Relay P controls a movable contact 0 engaging the fixed contact i d. 'RelayiP controls the movable contact 0 engaging the fixed contact d relay N controls 'a-movablecontact a engaging a fixed contact (Z and relay N controls a movable contact'c engaging a fixed contactd. The local selecting circuit is composed of a series of; parallel branches 40. These branches 40 are divided into five groups m m m, m, m,-and eachgroup m qm is provided with terminal conductor n or- 72. The branches I 40 are. divided into five other groups g g ggtg, g each"group consisting of branches from-the five groups mm The contact terminal for each of the groups 9 etc., is a movable contacto controlled by a magnet as, g 9 9 9 9 Each magnet 9 -9. isin a separatebraneh 50. Each terminal conductor n'includes-a'holding coil wofone of the 3' relays "P, P N, N and terminates'in a'fixed contact 52, while'terminal conductor 1, is

joined to one of the fixed contacts of relay '0. An elctromagn'et w controls a series of movable contacts y,- 3 3 y, y, vibrating 3 between the contacts 51 and 52. Magnet :1:

has a holding coil 53.: Eachbranch conductor 50 containing the coil of an electromagnetic switchg terminates in'a contact r stop 51. The conductor 55 shown as a heavy 40 line is a common battery wire suppliedfrom battery at 56, 57, 58, or 59 according to the position of the relay armatures through which such batteryis connected.

Assume that the letter F is to be printed,

5 and that for this purpose a positive impulse succeeded by a' second positive impulse in line'L is transmitted. The -first positive impulse attracts armature c, closes contact at d,'and battery from 58 passes via. 0 72, a, d,

y, 51, 50', 9*, 60,"'coil 610i the'electromagnet switch It, 62, 194,.63,-to "ground at 64. The

' same'im'pulse attracted armature' b .oftheneutral-relay Q closing circuit from ground at'6:7:via= 1), 43,45, coil 46 of magnet-k,- bat t'ery 47 to ground. The armature 48 ofgmag- .cur when line L is clear of the current im- 251, coil of S, 252,253, 254, 117 to ground at 255. This spacer magnet circuit is broken at 117 when magnet R is operating to reset carriage C. The second positive impulse in line L now causes armature c to again engage with (Z, circuit being from battery 58 via 7 2, c, d, 3 52, holding coil a of relay P, 11., type magnet f, terminal contact 0 of group 9 conductor 73 to branching point 74, thence in multiple are through the printing magnet 7 75, 175, armature 76 of magnet Y, back contact 77 to ground at 78, the other branch being via 74, 79, stop magnet 80 to ground 83.

Magnet 80 withdraws its pawl 81 from the toothed wheel 82 releasing the motor driven 80 type wheel shaft 8. The armature of printing magnet 75 carrying press pad 84 is attracted against the forceof spring 85. This press pad 84 produces a printing impression upon demagnetization of the coil 7 5, the paper sheet 79 being forced against the face of the type wheel when circuit is broken. The printing impression is taken under the following conditions: When the pawl 81 is Withdrawn from the toothed wheel 82, the radial arm 86 fixed on type wheel shaft 8 propelled by a motor, such as a spring w, rotates in the direction of the arrow, Fig. 1, and engages with the armature bar 87 of a type magnet. This armature'bar 87 is attracted into the 95 plane of movement of the arm 86 by closing circuit through the type magnet (shown in dotted line at f, Fig. 3) as described. Upon engagement of the contact stop or arm 86 with the contact stop 87 a local circuit is closed from ground at 90 via 86, 87, 91, coil of magnet Y to grounded battery92. Magnet Y attracts its armature 76, breaking contact at 7 7 this denergizes printing magnet which releases press pad 84 to produce the impression as described; this break is in one -multiple 'a rc branch and' immediately following this action the magnet Y having also attracted'its second armature 93, closes circuit from the common battery wire 55, via 93, 94, coil of magnet V, 405 to-contact 44, and if the main line is clear of controlling impulses to ground at 67. This can only 00- pulses. Ma'gnet V attracts its armature 63,

breaking contact at 194,- and opening circuit through coil 61 of magnet, 11., conductor '60 and coil of g.- Magnets. 71. and gears thereupon denergizedreleasing their i armatures. The denergization of g breaks the circuit which included the front contact of polar relay P, which was traced as follows; from grounded battery 58, via contact a 72, c, d, 3 52, coil 1a of relay I, conductor 02., type magnet f, terminal contact 0 of relay 9*, conductor 73 to dividing point 74, through conductor 79, coil of stop magnet 80 to ground 83. This deenergizes polar relay Pftype magnet f and stop magnet 80. Magnet 7:. also releases its armature 48 which 45 v characteristic impulses which may be used,

any pa1r of which may be used alone, and

1 row of type may be printed. When acharoness falls away from contact 49, breaking circuitin conductor 65 and deenergizing magnet :10. The parts resume their normal position of rest.

It is to be noticed that when the printing oycle'is completed and the parts are to be returned to their normal position of rest, circuit conditions are initiated in the selecting circuit which are only completed by the return of the neutral armature b to its back contact and this can only occur when the controlling impulses have ceased to exist in the coil of the neutral relay.

The type wheel t is provided with two parallel lines of type; it is coupled to the shaft 8, and is movable thereon. Normally it rests in its lower position where the, upper acter in the lower row is to be printed the shift magnet p, Fig. 3, is operated and its armature 300, carrying a roller 301, engages with and raises wheel t and places the lower line of type in the printing position. There" is an inking pad e pivoted at 302 and held in engagement with the surface of the type wheel by spring 303.-

The controlling impulses employed in the operation of the printing apparatus are positive or negative impulses, in either line followed in every case by aspace and a positive or a negative impulse, and again, coincident impulses of the same polarity in both lines followed by a space and a positive or a negatlve impulse in one line or the other, or again by two impulses of the same polarity in two lines followed by aspace and two impulses olarity inboth lines. It results from thls t at there are six characteristic of the same transmissible controlling impulses. Of these, one characteristic impulse is reserved for a special purpose, to wit: the double negative impulse in lines L and L in multiple are; it is employed to clear out and re: turn to normal position of rest all magnets in the selecting circuit. This leaves five results in a possible permutation of five times five or twenty-five diflerent charac-N tGIlSlJlC impulse combinations. Of these, one is arbitrarily selected to perform a function auxiliary to the selection of a type magnet; to wit, the shifting of,the type wheel or car, rier bearing two parallel rows of impression characters.

The polarized-relays are arranged in pairs, those responding to the same polarity of line impulse being located in juxtaposition with cooperating and mechanically engaging con tacts, located one on each armature bar. The armature bars are so pivoted and the contacts are so arranged with respect to each other that when the two armature bars are in their attracted position,-the cooperating contacts have each moved half way toward each other to arrive at a common contact point. This is so in case of the double negative controlling impulses where the neg- 1 ative impulse is transmitted simultaneously on both lines connected in multiple are,

which controlling impulse is used for re I Separate batteries 56, 57, 58, 59, etc., are

shown to simplify the drawing, but a single grounded battery electrically connected with the armatures of the difl'erent polar relays would perform the same function.

The armatures of the relays N N make a separate contact when both are attracted by their magnets. Armature bar 30 is pivoted at 31 and carries a contact 32 to which itis mechanically united through the insulatingmaterial 33. Contact 32 is connected to ground at 34. Armature 35 pivoted at 38 carries contact 36 to which it is mechanically connected through insulating material 37 and the contacts 32 and 36 are in position to contact with each other when both armatures are attracted simultaneously. The relays P and P have their armatures similar ly provided with contacts which engage when both are simultaneously attracted,

To reset the paper carriage C at the end of the printed line on the page, a negative impulse -on both lines L 'and L to operate relays N, N is transmitted; this closes the contact 106, circuit passingfrom ground 34 via 106, conductor 108, contacts 100, 101, closed'by carriage C through coil 305 of release-magnet R,jbattery to ground 111. Holding pawl 112 is thereupon withdrawn from the ratchet 113 and spring actuated toothed Sector 114: returns the carriage to its opposite limit. A mechanical latch115 locks the armature bar which controls holding pawl 112 retaining said pawl in its open-p0 sition. When the carriage-reaches 1ts opposite extreme. position "it closes contacts 102 and 103 completing a circuit from ground 104,-magt1etT to common battery wire 55. This closes circuit through line space mag- .net \T-which attracts its armature piv oted 51:12 4

There is an angular frame 131 pivoted at 121; it also carries the armature bar 120 and carries a pin 122 projecting through a slot 123 in the reciprocating, spring-retracted bar- 124. On th'e'bar 124 is a pin 125 projecting throu h a slot 126 in the link 127 pivoted zit-148 to lever 129 by means of which its position is adjusted. The spring 255 via 1 16, 118, conductor 119, 102, 103,

then moves the free terminals of the bars 124 and i upwardly carrying the paper upwardly between them. When, the paper is has been carried tothe upper feed limit it is caught and held by suitable holding devices like dogs 133 on carriage C. The spring 130 ated bya selecting branch circuit completed 7 n a manner similar to the completion of\the circuit of any type magnet. To trace the retracts the frame 131 to its normal posi;

' Magnet it attracts its armature 210 and 01rtion.

The paper 70 is a sheet in form, supplied. 'from a roll (not shown) located below the carriage C; itpasses up between the press pad 84 and type wheel t, which are shown,

moved to one side, so as not to obscure the view of other parts. The frame 131 is above the carriage C and the end of the armature bar 120 is in position to engage the latch 115 and cause it to release the armature 225 of magnet R,- which armature supports and controls pawl 112, which then reengages with ratchet 113. As shownin 3, the

paper is above the carriage, shown in dotted outline, has been turned edgewise so as to permit of clearly showing the feed bars 124 and i in their relation to the upwardly moving paper.

Forthe purpose of paragraphing, the carriage is provided with means for returning it to the paragraph line from anypoint in its advance movement, consisting of a sepa rate winding 140 on the reset magnet R; this winding is included in a circuit controlled by the relay 1'. The relay 0" is operated by the relay u and the relay u is opercourse of this circuit it is'to be understood that theparagraphing results from a positive lmpulse transmitted on both lines L and L followed'by a succeeding positive impulse on both said lines, and'this is followed by the controlling iinpu'lses designed to actuate that type magnet, in the place of which the paragraphing controlling magnet coil 140 is inserted by the operation of relay 1". Let us assume the transmission of two positive .impulses on both lines; this closes contact at 200, circuit passing from the com- Both armatures of magnet h are attracted. 1

This closes circuit through the spacing magnet, as normally occurs on any-type selection.

Relay 9 has attracted its armature and locked .it in attracted position thereby lock- .ing relay/ l in attracted position; relay g The second positive impulse on both lines L v and L completes a circuit via 55, 200, y, 52, 203, coil of-relay 'v, conductor 60, 61, 62, 63 and 64. Relay 4) now looks itself, closing contacts at 204, 205 and 206; relay 1! closes local circuit from common battery wire 55 via 205, 207, coil 208, 209, 202 to ground.

cuit is closed from common battery wire 55, via contact 93 of relay Y, 211, and also via 55, 212, then 213 and coil 214 of magnet u, contacts 215, 210, through two multiple arc branches, one via coil 216 ofmagnet 1' to ground at'415, the other via conductor 217 and coil of shift magnet 79 to ground; this shifts the type Wheel from one row of type ,to the other; the lower row is now in position to print from. The operation of relay 1- has closed circuit from grounded battery 250 via armature 400, contact 401, conductor 402, contact 206, 201, conductor 404, coil of magnet V, conductor 405, back contact 44 of neutral relay Upon the termination of the second positive impulse in L and L neutral relay Q is de'nergizedand closes the above circuit to ground 67 through armature b. This energizes relay V, attracting armatures 63 and212. The attraction of armature 63 breaks the circuit whereby relay! and relay 0 were locked, namely, from common battery conductor 55 through two multinle paths one via armature 204 of relay '0, coil of 0, the other via armature 406 of relay g coil of g -and then via conductor 60, to coil 61, conductor 62, contact 194, armature 63 to ground 64. This causes magnet 9 and magnet '12 to release their armatures and also causes relay h to release its armatures, breaking the circuit of the spacer magnet S at the contacts 254, 253, and breaking the circuit of the relay m at the contacts 49, 48 of relay h. The falling of magnet g and '1) break the circuit whereby magnet V. was energized as just descrlbed, namely. from ground through battery 250 to armature 400 of relay 7', contact 401, conductor 402, contact 206 of relay 0 and 201 of relay 9, conductor 404, coil of V, conductor 405, contact 44, armature b of relay Q, to ground 67. This circuit is broken at the contacts 206, of relay 4) and 2010f relay 9 when these magnets are denergized.

It is to be noted that the transmission of a positive impulse on L and L? repeated twice with an interval of no current results in leaving the following circuit looked after the other relays have been restored to their normal condition of rest: common battery wire 55 through armature 93 of relay Y and conductor 211 and in multiple are through contact 212 of relay V, conductor 213, coil 214 of relay it, contact 215, armature 210, coil 216 of relay 7' to ground at 415 and the latter branch in multiple arc with conductor 217, and coil of shift magnet 1) to ground. This results in holding the shift magnet in its shifted position,

bringing into position the lower line of type on the wheel; also in holding in its changed. or energized position relay rwhich produces a circuit condition such that the impulses normally adapted for the energization of a type magnet for which coil 140 of magnet R has been substituted if sent over the line .or lines when this relay r is in its energized position, will result in energizin'g coil 140 of. reset magnet R. The type magnet here arbitrarily determined upon for this purpose corresponds to the letter M and, as determined upon inthis particular instance, is controlled by the controlling impulses pdsitive on L followed by an interval of no current in either line, then by a negative impulse on L The circuit when these impulses are sent immediately following the energization of the shift magnet 32 and the relay 1' resulting in the locked condition of shift magnet p and relay 1 just described, is asfollows: Positive impulse on L energizes polar relay P and relay Q also responds. Relay P closes circuit from battery 59, conductor 72, armature 0 of relay P front contact (Z con tacts y and 51, conductor 50, coil of relay conductor 60, coil 61 of relay it, 62, 194, 63 to ground 64. The closure of this circuit results in the energizing magnet g and looking it. The simultaneous energization of relay Q resulted in the closure of the following circuit: from ground 67, through armature b, 43, 45, coil 46 of relay 7]., battery 47 to ground. Relay it attracted both armatures 48 and 253 and received through its coil 61, in the circuit of the magnet 9 just traced, suflicient current to hold it. The closure ofcircuit through armature 253 and conductor 254 by relay It results in completing the following circuit: from ground 255, through armature-117 of magnet 13,254, 253, 252, through coil of spacer magnet S, conductor 251 to the back contact of armature 400 of relay 1'. The circuit will be open 'at' this point 400 and the spacer magnet S therefore cannot respond. The closure of armature 48 t cOnta-ct 49 by relay it completed the following circuit: from common battery wire 55,- armature 48 of relay k, 49, 65, coil 66, of relay w, contact 44, which is open until the termination of L positive impulse under consideration. At the termination of this impulse, this circuit is com- I pleted, through armature b to ground 67;

relay a: will operate, closing a locking cir-- ductor 311 armature 4100f relay 1,141,

coil 140 of reset magnet R, 411, armature 412 of relay 9 413, armature 414 of relay 1' to ground contact 415. The simultaneous operation of relay Q tended to close circuit through coil 46 of relay h, which had already been closed and locked. The circuit just traced throughthe coil 140 of" reset magnet R causes it to attract its armature,

withdrawing pawl 112 from engagement withthe teeth-of the ratchet 113 on shaft 417. The action of spring actuated sector 114 causes shaft 417 to revolve and gives to carriage C a return movement, closing, at

the end of this movement contacts 102 and 103. The pawl 112 When withdrawn from the ratchet was held mechanically by latch 115 out of engagement with ratchet 113. The automatic closure of contacts 102, 103 by the reset of carriage C completes the following circuit: from common battery wire 55 through the coils of magnet T, conductor 104, 103, 102, 119, 118, armature 117 of magnet R to ground 255. The closure of this circuit energizes magnet T, which moves the paper from one line to the succeeding line as heretofore described,, and this shifting movement also operates to withdraw the mechanical catch 115, to release pawl 112 which is then free to fall. The operation of magnet T also closes the following circuit: from ground through armature 120, of relay T, contact 418, conductor 91, coil of relay Y, battery 92 to ground. This operates relay Y which attracts armature 76 and 93. The operation of 76 performs no useful function at this time. The attraction of armature 93 removes one source of battery from the circuit which is holding'relays u, r and shift magnet p. On its front contact the armature 93 of relay Y closes circuit from common battery wire 55 to contact 94 through coil of relay V, conductor 405, contact 44, armature b to ground 67. This energizes relay V which attracts its armature 212 and 63. The attraction of battery from the circuit through conductor 213 which Washolding relays u, r and shift magnet 19 in the energized position. They are therefore in open circuitupon the operation of relay V. The attraction of armature 63 breaks the circuit from ground 64,

through 63, 194, 62, coil 61 of relay h, which armatu1'e 212 removes the second source of and reset magnet R, which allows the pawl 112 to renga-ge with its ratchet. The deenergization of reset magnet R breaks the circuit from ground 255 through armature 11? and front contact 118, conductor 119, contacts 102, 103, conductor 104 and coils of magnet T to battery wire 55. Magnet T is deenergized and all parts of the circuit resume their normal position of rest.

The double negative controlling impulse,

that is, a negative impulse thrown onto a circuit composed of both lines in multiple arc, operates the polarized relays ,NN and the neutral relay Q. In operating the polarized relays N N, it disconnects the source of current from the common battery wire and from this common battery wire the relays of the selecting local circuit obtain their locking current so that when the generator is disconnected, all locked relays are forced to assume a normal condition of rest. The double negative controlling impulse also operates the spacer magnet S to provide a space between words and when the paper carriage C is at or near the termination of its excursion from one side of the line of print to the other, and usually when it is within seven characters of the terminal, the

carriage automatically closes the circuit of the reset magnet R the point 100, 101,and the next time the space key is depressed and the double negative controlling impulse is thrown upon the line', as for the purpose of 5 spacing, it closes the second point in this reset magnet circuit so thatthe carriage is automatically returned to its starting point. The space bar inthe transmitter operates contacts which throw this double negative controlling impulse on to the line as de-' scribed, and it is theionly key which employs the double negative impulse. The frequent use of the space bar, ascustomary in printing, results in the maintenance of the selecting circuit in a cleared condition,

as at the beginning of each word, and insures the return or the paper carriage in due time.

To shift the typev wheel and to print=a character from the lowerrow of characters on the type wheel, there are transmitted certain controlling impulses which, exactly as in the previously discussed case of paragraphin result 1n leaving the shift magnet.

p and re ays u and 1? locked in an energized to the polar relays P and P will be closed,

.64. This energizes magnet g which locks .72. to grounded'battery 47.

trolling impulse terminates, neutral relay Q polar relays P and P. It will also energize neutral relay Q. The contact 200 common closing circuit from common battery wire 55 through contact 200, y", 51, 50, coil of relay g 60, coil 61 of relay h, 62, 194, 63, to ground itself through its armature contact 406. Simultaneously neutral relay Q, has drawn its armature 5 against the contact 43, clos ing circuit via 67, b, 43, 45, coil 46 of relay Relay it therefore attracts its two armatures 48 and 253. By the circuit st traced relay it receives suflicient current in its coil 61 to hold its armatures in attracted position. The attraction of armature 253 closes the following cir} cuit: from ground 255 through armature 117 of reset magnet R, 254, 253, 252, coil of spacer magnet S, 251, armature 400 of relay R to grounded battery' 250. This operates spacer magnet S. The attraction of armature 48 of relay it closes the following cir-' cuit: from common battery wire 55, 48, 49, 65, coil 66 of relay w to back contact 44; of neutral relay Q. When the first conreleases armature b and completes circuit through armature b to ground at 67, this circuit energizes relay 9: which attracts armature contacts 3 to y inclusive. Armature contact 1 closes a locking circuit from ground 18 through coil 53, armature 3 to conductor 65, contact 49 and armature 48 of relay 7:) to common battery wire 55. The second double positive impulse, that is, positive impulses over both lines in multiple 5 are, will again energize polar relays P and P and again close contact 200. This closes from common battery wire 55 through 205,

conductor 207, coil 208 of relay u, 209,202

of relay gto ground." This energizes relay uewhich attracts its armature 210. This armature closes the following circuit: from common battery wire 55, through contacts in multiple arc, namely, armature contactcoil 214 of relay at contact 215, armature v210 of relay u, then in multiple are through coil 216 of relay 1' to ground contact 415 and through conductor 217 and coil of shift magnet to ground. This energizes shift magnet p, displacing the type wheel, so as to bring into printing position the lower row of characters; The closure of this circuit also energizes relay 1" which attracts its armatures 410, 400 and 414. On breaking circuit at its back contact, the armature 400 of relay 1' breaks the circuit of'the spacer mag= net S which is thereby deenergized. The armature 400 of relay r closes the following circuit on its front contact: from grounded battery 250 through 400, 401, 402, contact 206 of relay 1;, contact 201 of relay 9, conductor 404, coil of relay V, conductor 405, back contact 44 of neutral relay Q. At the termination of the second double positive impulse, relay Q releases its armature and completes this circuit -through its'armature b to ground at 67. This energizes relay V which attracts its armatures 63 and 212. The attraction of armature 63 breaks the circuit from ground 64, through 63, 194, 62, coil 61 of relay h, conductor 60, coil of relays g and c in multiple to common battery wire 55. This releases relays 9 o and h. The release of armature 253 of relay h accomplishes no useful purpose. The release of armature 48 of relay It breaks the circuit of relay m which is thereby deenergized. The attraction of armature 212 of relay V removed one source of current for circuit through conductor 213, coil 214 of relay to, 215, 210, relay 0" and shift magnet 12 in multiple. This circuit 7 still gets current throughthe back contact ofrelay Y and its armature 93. The deenergization of relays g and '0 broke the circuit through which, as already traced, relay V received its current as follows: grounded battery 250, armature 400, 401, 402, contact 206 of relay '0, contact 201 of relay 9, conductor 404, coil of relay V, conductor 405, contact 44 of relay Q, armature b to ground 67,'thereby deenergizing rel y V and restorin all parts of the circuit to their normal position of rest, with the exception of the circuit through coil 214 of relay u and thence throughrelay 1', and shift magnet p in multiple. We, have now accomplished the purpose of the shifting operation and the shift magnet holds the type wheel in its changed position. A character. is now to be printed, for example, the dollar mark. The dollar mark in the lower row on wheel 25 corresponds in position to the letter A in the upper row and the same characteristic controlling impul'ses'will print either character, depending upon the position offthe shift magnet. The controlling impulses employedare a-positive impulse over both lines in multiple succeeded by an interval of no current and a positive impulse in L The sequence of events is as follows: The positive impulse in both lines operates polar relaysP and P and neutral relay Q. Polar relays P and P close common contact 200, completing the following circuit from common battery wire 55, through contact 200, y, 51,50, coil of relay Q5, 60, coil 61 of relay h, 62, contact 194, 63 to ground at 64. This energizes the relay 9 which locks itself.

Simultaneously neutral relay Q has operated, closing the following circuit: from ground 67 through armature b, 43, 45, coil 46 .of relay h to grounded battery 47. Relay k is thus energized and practically simultaneously receives through its coil 61 suficient current from the circuit of relay 9 just traced to hold its armatures in the attracted position. Relay it attracts its armatures-48 and 253 and armature 253 closes circuit of spacer magnet S, but this circuit remains open at the back contact of armature 400 of relay 1' owing to the attracted position of armature 400; magnet S is-therefore not energized at this tlme. Armature locking circuit through coil 53. The second impulse, which is a positive impulse on L energizes polar relay P and neutral relay Q. Polar rela 1P attracts its armatures 0 and closes the ollowing circuit: from battery 58 through armature 0 of polar relay P 72, c, at, through y 52, locking coil a of relay P, conductor a, through type magnet oi through terminal contact 0 of magnet 9 73' to branching point 74, coil of printing magnet 75, 175, 76, 77 to'ground at 78 and in multiple arc'with this printing magnet circuit from 74 via 79, through coil of stop magnet 80 to ground at 83. The closure of this circuit results in locking relay P, energizing type magnet a which raises its armature into the plane of the radial arm .86, attracting the armatures of printing magnet 75 and stop magnet 80. The stop magnet 80 releases ratchet wheel 82 and'type shaft 8 rotates in the direction of the arrow, Fig, 1, until arm 86 engages type stop magnet 87. This results in stopping the type wheel withthe dollar sign in position to yield an impression .upon denergization of printing magnet 75. The contact of arm 86 with type magnet stop 87 closes thefollowingcircuit: from ground 90 viatype shaft 8, arm 86, 87,

sition of rest of the shift magnet 12 and of relays u and 1'. This is due to the fact that relay Y first removes one source of current for the circuit through conductor 213 and through relay u, thence through'relay a" and through shift magnet p in multiple, and that while this contact point at 93 is still open, relay V by attracting its armature 212, removes the second source of current for this same circuit, thereby deenergizing relay u,

which allows its armature 210 to fall away from its front contact 215, thereby permanently opening the circuit of relay 9" and shift magnet 17.

What we claim and desire to secure by Letters Patent is:

v 1. In a printing telegraph, the combination of a local selecting circuit having a plurality of branches, a type magnet in each said branch, switches for completing a circuit at each terminal of any type magnet branch, and electromagnetic self-locking means for actuating said switches responsive to two direct current impulses and an intervening interval of no current.

2. In a. printing telegraph system, the combination of a plurality of conducting branches, a type magnet in each said branch, an electromagnetic switch for closing contact on one side of a type magnet and locking said contact, an electromagnetic switch for completing said circuit on the other side of said type magnet and locking said contact, and means for controlling said switches by two direct current controlling impulses separated by an interval of no current.

3. In a I printing telegraph system, the combination of a plurality of conducting branches, a type magnet in each said branch, an electromagnetic switch for closing contact on one side of a type magnet and locking itself, an electromagnet switch for com-,

pleting said circuit on the other side of said type magnet and locking itself, means for controlling said switches by two direct current controlling impulses separated by an interval of no current, and means for automatically :unlocking said switches and returning said contacts tonormal condition.

4. In a printing telegraph, the combina-' tion of a plurality of type magnets; a'local selecting circuit branch for each said mag- -net; and means for completing a circuit through any one branch, said means including two line wires, polarized electromagnetic switches in each line, a neutral'electromagnetic switch common to both lines, and

means for locking either polarized magnet 4 in its energized position.

5. In a printing telegraph, .the combination at a receiving station of a lurality' of type magnets, a local circuit ranch for each magnet, and means for closing any branch in response to two direct current impulses and an interval of no current, said.

means including polarized magnets respon sive to said impulses to cause the closure of i said local circuit branch at one pomt and a neutral relay responsive to said interval of no current to cause the closure of said branch at a second point.

6. In a printing telegraph, the combinetion of a plurality of type magnets, a local circuit branch for eachsaid magnet, means for completing any .one of said branches in response to two current impulses separated by an interval of no current, said'm'ea-ns including .etwo polarized switches and aneutral electromagnetic switch, and means whereby a polarized; switch operates first to cause the closure of a break point, then the neutral switch operates to close a break point, and, finally a polarized switch operates toecomplete said local circu'it branch. I

7. In a printing "telegraph, thecombination of a plurality of type ma ets, local selecting electromagnetic circuit branches, one or eachjmagnet, four polarized electromagnets, a neutral electromagnet having a plurality of windings, switches controlled by said electromagnets, and means for operating said electromagnets inpairs, successively, mresponse electromagnetic switch, and means for y crating said polarized switches coincid to close one break point in said branches,

then the neutral switch to close a second break point, then a polarized switch to complete said, circuit.

9. In a printing telegraph system. the

combination of a plurality of branch "circuits, arrangedim groups; a type magnet each branch circuit; and means for causin 1 the energization of any one of all the sai type magnets, saidmeans comprising'four polarized electromagnetic switches, a. non:

tral electromagnetic switch, and mealnsfor operating said 4 switches by "two successive current ulses to close break points many 4 one of sai groups of branch clrcuits infthe the energization' ofany one of all the said type magnets, said means comprising four polarized electromagnetic switches, a neutral electromagnetic switch and means foroperating said switches by two successive current impulses to close break polnts 1n said branch circuits in the following order: first a pair of polarized switches, second a neutral switch, third a pair of polarized switches.

11. In a printing telegraph, a selecting circuit having a' pluralitvof branches, two

main terminals forcontrolling each of said branches, a. movable contact common to both terminals, controlling magnets consisting of polarized electromagnets and a neutral magnet, a connection from said movable contact to the armatures of said controlling magnets, means for shifting said contact from one terminal to the other, electromagnetic switches, means for locking said switches in closed position in said branches, and means for operating a polar magnet to close a switch and lock it, to shift said movable contact and lock it and to complete said circuit through the second main terminal and lock it.

12. In a printing telegraph, a rotary type carrier, a plurality of selecting circuit branches, a type magnet in each said branch, electromagnetic locking switches controlled by two current impulses for closinga circuit through any branch to control the rotation of said type carrier, a switch for said branches, a magnet to operate said switch, a circuit for said magnet, and inea nswhereby the stoppage of the type carrier closes a circuit through said magnetto release said. 'lOCkIIIg switches.

13. In a printi-ngtelegraph, a combination of a rotating type wheel, a shaft therefor, a contact stop movable by said shaft, a plurality of type magnets, armature contacts,

therefor in position to engage andhold said type shaft stop, a local circuit including said contacts, a magnet in said circuit, a selecting circuit, and a circuit breaker controlled by said magnet to break the selecting circuit following the stoppage of the type shaft.

14. In a printing telegraph, a 'plurahty of conducting branches divided into groups,

a type magnet in each said branch, a terminal contact for each group, electromagnetic switches for closing a circuit through one terminal in each of said groups, holding coils for said magnets, circuit connections for the holding ,coils, a switch for opening- 1 second said holding circuit, a magnet for operating said switch, a circuitfor said magnet, a rotating type Wheel shaft carrying a radial arm, a contact on said arm, a complementary contact, and means whereby a type magnet when energized blocks the movement of said radial arm, closes acircu t through said magnet and opens said holding circuit,

15. In a selecting device for printing telegraphs,the combination of a plurality of,

conductingbranches arranged in groups, a type-magnet in each said branch, line impulse selected self-locking means for closing a break in" any one of said "groups 'of branches, groups of branch conductors composed of one branch from each of the first anentioned groups, and line impulse controlled self-locking means for closing a break in'any one of said second mentioned groups, whereby any of said magnets may be selected by two line impulses.

16. In a selecting device for printing telegra'phs, the combination of a plurality of conducting branches arranged in groups, a type-magnet in each said branch, a terminal conductor for each said group, a self-locking electromagnetic switch for each said conductor, groups of branch conductors com-- posed of one branch from each of the first mentioned groups, a terminal conductor for each such econd mentioned group, and selflocking switches. for connecting the second mentioned terminals to their respective mentioned vgroups of branches, whereby any one of said magnets may be selected by two successive current impulses.

17. In a printing telegraph, the combination of a plurality of branches arranged in two sets of groups, contact terminals for each said group, a type magnet in each of said branches, a main switching apparatus for establishing a circuit to two group terminals in different sets in succession, means for operating said main switching apparatus by two successive direct current impulses, a switching device for allowing said lhain switching apparatus to control either of two group contact terminals, respectively, means whereby the first current impulse, closes one group terminal in one set, and means for shifting said switching device to the second terminal allowing the second impulse to close a group terminal in a second set and complete the selecting circuit.

18. In a printing telegraph, a controlling circuit consisting of the combination of two conductors connected in multiple arc and to a return conductor at the terminals, polarized relays in each conductor and a neutral relay common to both conductors, pairs of contacts for eachrela-y, a local selecting circuit having a series of branches with a type magnet in each branch, and local circuit tween said relay contacts and said local cir cuit branches.

In witness whereof, We hereunto subscribe our names this 28th day of February, A. D. 15 1911.

connections between said relay contacts and said branches.

19; In a printingtelegraph, a controlling circuit consisting of the combination of two conductors connected in multiple arc and to a return conductor at the terminals, polarized relays in each conductor, a neutral relay inthe return conductor, contact points controlled by said relays, a local selecting circuit having a series of branches, type magnets, one in each branch, and connections be- CHARLES E. SCRIBNER. FRANK R. MCBERTY.

Witnesses:

IRVING MACDONALD, W. B. VANSIZE.

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