US1090868A - Printing-telegraph system. - Google Patents

Description

P. R. MGBERTY & A. H. ADAMS. PRINTING TELEGRAPH SYSTEM. APPLICATION FILED MAYBI, 1912.

1.,U9Q868. Patented M51124, 1914-, 2 SHEETS-SEEET 1.

F. R. MGBERTY & A. H. ADAMS.

PRINTING TELEGRAPH SYSTEM.

1,090,868 APPLICATION FILED MAY 31, 1912. Patented Mar. 24:,

2 SHEETSSHEET 2.

. ,y 9 5m 1W5 [MW nMA v m IKU hm WNW F j W W f/vessesx PRINTING-TELEGRAPH SYSTEM.

Specification of Letters Patent.

Patented Mar. 2d, 1914.

Application filed May 31, 1912. Serial No. 700,759. a

To all whom it may concern Be it known that we, FRANK R. Mo- Bnu'rr, citizen of the United States, residing at New Rochelle, county of lVestchester, and State of New York, and ARTHUR ADAMS, citizen of the United States, residing at Sparkhill, county of Rockland, and State of New York, have invented a certain new and useful Improvement in Printing-Telegraph Systems, of which the following is a full, clear, concise, and exact description.

This invention relates to printing telegraphs, and more particularly to printing telegraph receivers in which the characters are selected by a combination of but two direct current impulses received from a distant station over the main line conductors and a ground return.

One object of this invention is to provide a receiver in which the characters are carried by a wheel mounted on a rotatable type shaft and in .Which the characters are selected by means of type magnets located in a plurality of branch circuits, the type magnets themselves being selected by a combination of impulses received from a distant station.

Another object of this invention is to pro vide a receiver in which the second impulse of a combination of impulses of like character but of difierent duration may be superposed upon the first impulse of the combination of impulses thereby eliminating the interval of no current that ordinarily separates the two impulses of a combination of impulses.

Another object of this invention is to provide a printing telegraph receiver in which the characters are ed in response to controlling impulses received from a distant station and in which the necessary interval betweenthe initiation of the controlling impulse or impulses for one character and the initiation of the con trolling impulse or impulses for a succeeding character may be materially shortened; The feature of this invention by means of which this last object is accomplished involves an arrangement of circuits and apparatus in-which is utilized what we have called the overlapping cycle system of control and is arranged and operates upon "the basis that the sending of impulses from selected and print-;

inclusive are provided with a distant station for controlling the printing apparatus first sets up or establishes certam electrical changes or conditions in portlons of such circuits and apparatus, which changes or conditions are maintained the cessation of the impulses from the sendmg station and until the has taken place when they are automatically eliminate during which printing operation the initiation of a further controlling operation for the purpose of establishing a new set of electrical changes or conditions in tie apparatus and trol the printing operation may be begun.

In the drawingsFigures 1 and 2 combmed illustrate a system embodying our invent on and in which so much of the mechanical apparatus as is necessary to understand the Working thereof is shown in per speotive.

Receiving relays 101 to 104 and 106 to 109 inclusive and 115 are connected to the main line Wires L relays 101 to 104 inclusive and the winding 10:) of the relay 115 are connected directly to the main line wire L while the relays 106 to 109 inclusive and the winding 110 of the neutral relay 115 are directly connected to the main line wire L Of the relays connected to the main line wire L 101, 102 and 103 are polarized, while the relay 104 is a neutral relay. The relays are so connected to the main line wires L and L that relays 101 and 102 respond to negative current sent over line L and relay 103 responds to positive current sent over line L relays 106 and 108 respond to positive current received over line L while relay 107 responds to negative current sent over line L; relay 104- responds to either positive or negative currents received over line L while relay 115 is energized by positive or negative currents received over lines L or L and relay .109 responds to either positive or negative currents received over line L This set of relays acts to energize a set of group magnets 132 to 136 inclusive which are connected to the armatures of the relays through the branch circuits, 120 to 130 in elusive. These group magnets 132 to 136 switch levers or armatures 143 to 147 inclusive which make contact respectively to a plurality of branch circuits leading to a bank of type magnets. These type magnets are divided into groups as shown in Fig. 1, and it will be noted that any one of the armatures or switch levers 143 to 147 inclusive have the branch circuit of one magnet out of every group connected thereto. These groups of type magnets are connected to conductors 175 to 179 inclusive, which conductors terminate at a point opposite the conductors 126 to 130 inclusive. Between these two terminal points are arranged switch levers 121 to 125 inclusive operatedby a switching relay designated by the reference numeral pulse of a combination of impulses which arrives over the main line conductors selectively operates one of the group magnets, 132 to 136, inclusive, above referre which attracts its armatures and provides a locking circuit for itself, as will be here-. inafter described. The attraction of the armature of the selected group magnet closes a break point in a circuit throu h one type magnet of each of the groups of type magnets shown. At the cessation of the first impulse the armature 1680f the neutral relay 115 is retracted closing an energizing circuit for the switching relay -120, which thereupon moves all the switching levers 121 to 125 inclusive from the normal position shown into their alternate position in contact with the conductors 175 to 179 inclusive. The succeeding impulse of the combination of impulses completes a circuit through one of the conductors 17 5" to 179 inclusive thereby determining which of the type magnets is to be energized.

Let it be assumed that it is desired to print the letter I on the record medium and that the combination of impulses which will elfect this result is a positive impulse received over the line L followed by an interval of no current over either line an then a positive impulse received over the line conductor L A positive impulse received over the line L will energize the relays 103, 104 and 115, which relays attract their armatures establishing a circuit which may be traced from the armature 116- of the neutral relay 109, conductor 254, armature 117 of the relay 103, conductor 255, switching lever 123, conductor 128, group magnet 134, conductor 138, first sequence relay 139, conductor 140, armature 141 ofthe clearing-out relay 142, battery 137 to ground. As a result of the closure of this circuit the group magnet 134 is energized attracting its armatures. First sequence relay 139 is energized attracting its armature 171. A locking circuit for the group magnet 134 and first sequence relay 139 is established which may be traced from battery 137, armature 141, conductor 140, energizing winding of first sequence relay 139, con- 5 ductor 138, group magnet 134, contact 161,

120. The first imductor L is received from armature 154, conductor 165, armature 166 of the relay 131 to ground. At the cessation of the first impulse the relays 103, 104 and 115 are deenergized and when the armature 168 of the relay 115 is retracted a circuit is closed which may battery 167, armature 168, conductor 169, energizing winding of the switching relay 120, conductor 170, armature 171, conductor 165, armature 166 to ground. The switching relay 120 is therefore energized moving all the switching levers 121 to 125 inclusive from the normal position shown into their alternate positions in contact with the conductors 175 to 179 inclusive. It also attracts its armatures 172 and 173 and a locking circuit is established which may be traced from battery 174, armature 172, energizing winding of the relay, conductor 170, armature 171,'conductor 165, armature 166 to ground, so that by this means the switching 121 to 125 inclusive are held in their alternate positions. The interval of no current being at an end the second impulse" of the combination, positive over the line conthe distant station. This impulse energizes the relays 106, 108," 109 and 115, .closing a circuit which be traced from levers may be traced from the armature 111 of the relay 104, conductor 256, armature 257, conductor 258, switching lever 124, conductor 176, through the lower winding of the type magnet I, conductor 259, lever or armature 145, conductor 180, conductor 181, energizing winding 260 of the circuit-holding magnet 182, conductor 183, conductor 184, energizing winding 262 of the clearing-out relay 142, battery 137 to ground.

It will be noted thatthe establishment of the circuit above tracedenergizes the clearing-out relay 142 which attracts its armature 141, and, if other means were not provided, would break traced through the group magnet 134 and the first sequence relay 139. It is to prevent this that the neutral relay 115 is provided which, when energized by the second impulse of the combination of impulses, establishes a locking circuit for this magnet and relay which may be traced from battery 167, armature 168, conductor 282, first sequence relay 139, conductor 138, group magnet 134, contact 161, ductor 165, armature 166to ground, this circuit being completed before the clearingout relay 142 is energized, thereby maintaining a locking circuit for the group magnet 134 and the first sequence relay 139 after the energization of the clearing-out relay 142. As a result of the second impulse the type magnet I is energized attracting its armature 208 raising the outer end thereof into the path of the radial arm 193 mounted on the type shaft 197. The circuit-holding magnet 182 is energized attracting its armathe locking circuit armature 154, conture 185 closing the following circuitz-batture 185 thereof was held in operative positery 191, the top winding of all the type tion by circuit from battery 191 passing magnets in series, conductor 190, stop magthrough the holding winding 261. When net 189, conductor 188, holding winding 261 the selector relay 210 attracts its armature 0 the circuit holding magnet 182, armature 214 the hatter 209, from whic the selector 70 185, conductor 194, conductor 164, conducrelay 210 obtains its energizing current, tor 165, armature 166 to ground. Stop magflows through the holding winding 261 over net 189 attracts its armature removing the the circuit battery 209, armature 214, coni stop 195 on the end thereof from the ratchet ductor 186, armature 185, in opposition to 196 of the type shaft 197 which immediately battery 191, with the result that the circuit- 75 starts to revolve in the direction of the arholding magnet is completely deenergized row shown in Fig. 2. The clearing-out re: and its armature 185 returns to its normal lay. 142 is energized attracting its armature or retracted position in contact with the ter-- cuit for itself which may be traced from of the armature 185 establishes a circuit battery 137, armature 141, holding winding which may be traced from battery 209, ar- 263, conductor 192, armature 171, conductor mature 214, conductor 186, armature 185, 165, armature 166 to, ground. The energiconductor 217, retractor magnet 218 to zation of the clearing out relay 142 also ground. The armature 220 of the retractor breaksthe previously traced holding circuit magnet 218 is thereby attracted and the 5 for the group magnet 134 and first sequence pawl 400. on the end thereof, meshing with relay 139 which thereupon release their arthe ratchet 196 on the type shaft 197 ro-- matures -145 and 171 respectively. The tates the type shaft in the reverse direction spacing magnet 198 is energized by circuit until the pawl 195 on the armature of the from battery 199, armature 281 of the special stopmagnet 189 is forced into engagement relay 233, spaclng magnet 198 conductor with a tooth of the ratchet 196 by the spring 200, armature 173 to ground. The spacing 219. This reverse movement of the type magnet 198 attracts its armature and the shaft 197 breaks the energizing circuit pawl 201, attached to the armature, meshes through the printing magnet 212 traced 30 with the ratchet 202 on the shaft 203, roabove, the armature of which moves to its tatlng the shaft 203 in the direction of the retracted position by a spring 401. -The type arrow shown in Fig. 2. The pinion 204, magnet being already deenergized by the which is fast on the shaft 203, meshes with retraction of the armature 185 of the circuita rack 205 on the paper carriage 206, which holding magnet 182 drops to its normal po- 35 paper carriage is thereby moved forward sition. The selector magnet 210 being dethrough the space of one character providenergized by the breaking of the circuit ing on the record medium a clean surface through the printing magnet 212 its armafor the character to be printed. As the seture 214 returns to normal position and all lected type magnet is locked 1n energized parts of the device return to normal unless 40 position by the circuit traced from battery in the meantime another selectin combina- 191 and the type shaft 197 is revolving, all tion of impulses has been initiatec. the rest of the circuits and apparatus may It will be evident that as soon as the lockbe returned to normal preparatory to the ing circuit for the selected type magnet and selection of a succeeding letter or character. the energizing circuit for t e stop magnet 45 The type shaft 197 revolves until the radial 189 is completed the group magnet switcharm 193 attached thereto contacts with the ing relay and first sequence relay may return armature 208 of the selected type magnet to normal position preparatory to the initiawhen it is stopped in position to print the tion of a succeeding combination of im character oii'the type wheel 209-corre'spondpulses, and that the successive combination 50 mg to the selected type magnet. Contact of of impulses may overlap to the extent that 55 armature 208, radial arm 193, type shaft the radial arm 193 with the armature 208 I as soon as a type magnet is selected and closes a circuit which may be traced from locked up another selecting combination of battery 209, selector relay 210, conductor impulses may be initiated either before or 211, printing magnet 212, conductor 213, during the printing operation initiated by the preceding combination of impulses. f it is desired to move the carriage for Ward without printing any character, as in mature 215 and the character selected is providing a space between successive words printedon the record medium by the pressor for paragraphing, a special impulse of 60 pad 216 carried on the outer end of the arnegative current received over lines L and mature 215. lVhen the group magnet 134 L? simultaneously is provided. A negatlve was de'e'nergized, as hereinbefore described, impulse received over lines L and L simulthe circuit from the battery 137 through the taneously energizes the relays 101, 102. 104, energizing winding 260 of the circuit-hold- 107-, 109 and" 115 which attract their arma- 65 ing magnet 182 was broken, but the armatures closing a circuit which may be traced 197 to ground. This circuit energizes the printing magnet 212 which attracts Its arfrom armature 116 of the neutral relay 109, conductor 118, armature 119 of the polarized relay 101, conductor 276, double negative impulse relay 131, 131 attracts its armature 166 and the circuit is closed through the spacing magnet 198 which may be traced from battery 199, armature 281 of the special relay 233, spacing magnet 198, conductor 200, armature 173 of the switching relay 120, conductor 279, armature 275 of the backshift relay 27 3, conductor 278, armature 166 to ground. The spacing magnet 198 attracts its armature 207 moving the paper carriage 206 forward one step as described above. As no locking circuit is closed by this impulse at its cessation all parts of the device return to normal.

The type wheel 209 is provided with two rows of characters as shown, and printing is ordinarily done from the characters shown on the top row.

lVhen it is desired to print any character shown on the lower row the shift magnet 271 must be energized to move the roller 403, mounted on the outer end of the armature 402, into contact with the type wheel 209 thereby shifting the type wheel longitudinally of the type shaft 197 and bringing the lower row of type into printing position.

The combination of impulses necessary to accomplish this result consists of a.positive impulse received over thefline'conductof L and on which, after an interv-ah of time, is

superposed a positive impulse received over; The

both main line conductors L and L positive impulse over line conductor L energizes the relays 103, 104 and 115 closing a circuit for the group magnet 134, which attracts its armatures providing a lock1ng circuit for itself and the first sequence relay 139, as above described. After a certa'i-n period of time and beforethe cessation of the first impulse the over L and L simultaneously) 1s. superposed on the first with the result that in addition to the relays 103, 104 and 115 already energized, the relays 106, 108 and 109 are energized attracting their armatures and closing a circuit which may be from armature 111 of the neutral relay 104, conductor 112, armature 113 of the polarized relay 106, conductor 114, switching lever 125, conductor 130, group magnet 132, conductor 138, first sequence relay 139, conductor 140, armature 141, battery 137. magnet 132 is energized and locked attracting its armature. As a result of having-the group magnets 132 and 134 energized at the same time a circuit is closed whichmay be traced from battery 137, energizing winding 262 of the clearing-out relay 142, conductor 184, energizing winding 265 of the shift relay 264, conductor 263, contact 102, armature 155 of the group magnet 134, conbattery 277. The relaysecond impulse (positive traced, normal position The group ductor 269, armature 151 of thegroup magnet 132, contact 158, to ground. The closure of this circuit energizes the shift re-- lay 264 which is locked by the circuit which may be'traced from battery 270, shift magnet 271, conductor 272, backshift relay 273,

conductor 274, holding winding 266 of the shift relay 264, armature 267 to ground. The circuit just traced also energizes and locks in energized position the shift magnet 271 which attracts its armature 402, moving the roller 403 at the outer end thereof into contact with the type wheel 209 which is thereby moved longitudinally of the type shaft l97,-moving the lower row of characters into printing position. It is to be noted that the circuit above traced also energizes the back shift relay 273 which attracts its armature 275 making it impossible to energize the space magnet wheel 209 is in shifted position. The shift magnet 271 will remain in operated position until either the end of the line of characters is reached, when it is automatically returned I to normal, or it may be returned to normal position at any time by sending a special impulse over the main line conductors. This special impulse is a negative impulse over lines L and L simultaneously, and is the same impulse which is used for spacing as above described. With the shift magnet in the operated position this special impulse acts as a. back shift impulse in the following manner: As tive impulse relay 131 is energized attracting its armature 166 which is moved thereby into contact with the terminal of the conductor 278 establishing a circuit which may be traced from battery 270, shift magnet 271, conductor 272, back shift relay 27 3, ar1nature275, conductor 278, armature 166 to ground.-' The establishment of this circuit shunts out the holding winding 266 o'f'the"shift relay 264 which is thereby .de-

energized, its armature returning to re tracted position. At the cessation of the double negative impulse, armature 166 of the double negative relay 131 returns to its breaking the circuit just traced-and. d'e't nergi'zing the shift magnet 271 and the back shift relay 273 which allow their armature's-. to return to retracted position. The retractiozi of the armature 402 of the shift magnet 271 allows the type wheel 209-to move downward on-the type shaft 197 to bring the upper row of characters on said type wheel into printing position.

To reset the paper carriage at the end of a lineor from any point- 1n its travel, a combination of impulses, which will operate the reset magnet 235 and the paper lift magnet 247, is transmitted from the sending station. This combination of impulses is made up ofa positive impulse over line conductors 198 while the type} before the double negabeing in L and L simultaneously followed by an interval of no current, and then an impulse similar in character to the first impulse.

A positive impulse received over main line conductors L and L energizes the relays 103, 104, 106, 108, 109, and 115 closing a circuit which may be traced from armature 111 of neutral relay 104, conductor 112, armature 113 of the polarized relay 106, conductor 114, switching lever 125, conductor 130, group magnet 1.32, conductor 138, first sequence relay 139, conductor 140, armature 141 and battery 137. Group magnet 132 is thereby energized establishing a locking circuit for itself and thefirst sequence relay 139 as above describe At the cessation of the first impulse the armature 168 of the neutral relay 115 closes an energizing circuit for the switching relay 120, which is energized moving all the switching levers 121 to 125 into their alternate positions into contact with the conductors 175 to 179 inelusive and closing a locking circuit for itself, as above described. The second impulse, which is similar to the first, energizes the same group of relays but establishes a circuit (owing to the switching lever 125 its alternate position) which may be traced through the conductor 175, armature 148, conductor 221, energizing winding 222 of the reset and paper lift relay 225, conductor 187, winding 227 of the reset relay 226, conductor 184, energizing winding 262 of the clearing-out relay 142, battery 137. As a result of the establishment of this circuit the clearing-out relay 142 is energized and locked up by the locking circuit from battery 137, armature 141, locking winding 263, conductor 192, armature 171, conductor 165, armature 166 to ground. The reset relay 226 is energized and locked up, the locking circuit being from the battery 230, armature 231, holding winding 229, conductor 232, special relay 233, conductor 234, reset magnet 235, conductor 236, contacts 237 and 238 to ground. Reset magnet 235 is thereby energized, its armature 239 removing the pawl 240 from cont-act with the ratchet 241 allowing theshaft 203 to revolve under the influence of the spring 242 and moving the paper carriage 206 to its initial position.

on the paper carriage 206 reaches its 8 initial position it breaks the circuit traced above through the reset magnet 235 at the contacts 237 and 238. The reset magnet is thereby deenergized, its armature 231 returning to normal. The reset and paper lift relay 225 become energized and locked up, the locking circuit being traced from battery 243, contacts 244 and 245, conductor 246, holding winding 223, armature 224 to ground. When the armature 231 of the reset relay reaches its normal position a' circuit is established through the paper lift --magnet 247 which tance to provide of these additional may be traced from battery' 230, armature 231, conductor 248, paper lift magnet 247, conductor 249, armature 224 to ground. The paper lift magnet 247 being energized attracts its armature 250 moving the paper grip 251 forwardly into contact with the pivoted lever 252, gripping the paper therebetween, and is then moved upwardly moving the paper across the face of the paper carriage 206 a suflioient disa clean surface for a new llne of characters. When armature 250 is attracted the arm 253 thereon moves the contact 245 away from the contact 244, breaking the looking circuit of the paper and reset relay 225, and all parts of the device return to normal. I

If it is desired toreset the paper carriage 206 from any point in its travel without at the same time operating the paper lift mechanism, a combination of impulses is received over the main line wires which will establish such a condition in apparatus shown in the drawings that the reset magnet 235 will alone be operated. The combination of impulses which will accomplish this result consists of a positive impulse over the main line wire L on which, after a period of time, a positive im ulse over the main line wires L and L simultaneously is superposed. A positive impulse over line conductor L will energize the relays 106, 108, 109 and 115 which will attract their armatures closing a circuit which may be traced from armature 111 of the neutral relay 104, conductor 256, armature 257, conductor 258, switching lever 124, conductor 129, group magnet 133, conductor 138, first sequence relay 139, conductor 140, armature 141, battery 137. The group magnet 133 attracts its armatures 144, 152 and 153 and establishes a locking circuit for itself and the first sequence relay 139 in a manner analogous to that alread described. After an-in terval of time and efore the cessation ofthe first impulse a second impulse positive over line conductors L and L simultaneously is superposed on the first impulse, and in addition to the and 104 become energized. The energization relays closes a circuit which may be traced from armature 111 of the neutral relay 104, conductor 112, armature 113, conductor 114, switching lever 125, conductor 130, group magnet 132, conductor 138 to the battery 137, as above described. The group magnet 132 attracts its armatures 148, 143, 150 and-151 and closes a locking circuit for itself in a manner similar to the group magnet 133. Having the group magnets 132 and 133 both energized at the same time, establishes a circuit which may be traced from battery 137, energizing winding 262 of the clearing-out relay 142, conductor the circuits and relays operated relays 103 V 184, energizing winding 228 of the reset relay 226, conductor 280, contact 160, armature 153, conductor 269, armature 151, contact 158 to ground. As a result of the establishment of this circuit the reset relay 226 is energized attracting its armature 231, thereby closing a circuit which may be traced from battery 230, armature 231,holding winding 229 of the reset relay 226, conductor 232, special relay 233, conductor 234, reset magnet 235, conductor 236, contacts 237 and 238 to ground; The special relay 233 is thus energized attracting its armature 281 and preventing the establishment of an energizing circuit for the spacing magnet 198. The reset magnet 235 is energized-by the circuit jgsttnacedand its armature 239 removes the pawl 240 from contact with the ratchet 241 and the paper carriage 206 is returned to its normal position under the influence of spring 242, as hereinbefore described. At the cessation of the combination of impulses the group magnets all return to normal leaving the energizing. circuit for the reset magnet locked up through the holding winding 229 of the reset relay 226. When the carriage 206 reaches its ini- -tial position it separates the contacts 237 and 238 breaking the locking circuit of the reset relay 226 and all parts of the apparatus .return to normal.

While we have shown and described several batteries or sources of current, it is to be understood that where these batteries or sources of current are of the same character and potential and located at the same place, they are preferably one and the same battery or source of current.

What we claim is 2- 1. In -a printing telegraph receiver, the combination of a stop magnet, a movable character carrier controlled thereby, a series of type magnets having two energizlng windings, a c rcuit including, in series, one winding of all the type magnets and having a break point therein, a selecting circuit for said type magnets comprising a plurality of branches, the other windings of each of the type magnets being each in one of said branches, a plurality of line relays responsive to current impulses for closing break points'in said selecting circuit, and in said type magnet series circuit to selectively operate said type magnets, a printing magnet and an energizing circuit therefor'controlled by the armature of the selecting type magnet to print the selected character.

2. In a printing telegraph, the combination of a stop magnet, a movable character carrier controlled thereby, a series of type magnets having two windings, a circuit including in series-one winding of all the type magnets, a selecting circuit for said type magnets comprising a plurality of branches, the other winding 'of each of the type magnets being each in one of said branches, a

lurality of line relays responsive to current impulses for closing break points in said selecting circuit to. selectively operate sald type magnets, a printing magnet and an energizing circuit for said printing magnet controlled by the armature of the selected type magnet to print the character selected by the type magnet.

3. In a printing telegraph, the comblnation of a rotatable carrier, having a plurality of characters thereon, a plurality of type magnets, having two windings, for ositioning said carrier, a circuit-holding re ay having an energizing winding and a holding winding, a stop magnet for controlling said character carrier, an operating circuit for said type magnets, having a plurality of branches, one branch including the energizing winding of a type magnet and the energizing winding of a circuit-holding relay, another branch including, in series, t e holding circuit of all the type magnets, the stop magnet and the holding winding of the circuit-holding relay, aplurality of line relays for closing said operating -circuit'to select a type magnet, a printing magnet and a circuit therefor closed by the armature of the selecting type magnet whereby the prmting magnet is operated and the selected character printed.

4. In a printing telegraph, the combmation of a stop magnet, a movable character carrier controlled thereby, a series .of type magnets, having two windings, associated therewith, a circuit including, in series, one winding of all the type magnet, a selecting circuit for said type magnets comprising a plurality ofbranches, the other winding of eachof the type magnets being each in one of said branches, a plurality of line relays, including a neutral relay, responsive to current impulses for closing break points in said selecting circuit to select predetermined ones of said type magnets, a printing magnet, an energizing circuit for said printing-magnet operated by the armature of the selecting type magnet to print the character on the character carrier selected by the type magnet.

5. In a printing telegraph receiver, the combination of a rotatable type shaft, a character carrier movable longitudinally thereof and having two rows of characters thereon, means for moving said carrier longitudinallvof the type shaft to bring either row of characters into printing position, said means including a shift magnet having an armature therefor associated with 'the carrier, a shift relay having an energizing winding and a holding winding, a selecting circuit for the shift relay including a pair of group magnets, the armatures of said group magnets being electricall connected together, an energizing'circuit or the shiftmagnets and stop l 1,090,868 W i relay including a source of current and the In witness whereof; we, FRANK R. M0-

armatures of the group magnets, a series of BERTY and ARTHUR H. ADAMS, hereunto subline relays operatively connected to the scribe our names this 13th day of May, A. D.

group magnets and operatin the same in 1912. 5 response to a combination 0 impulses, an

energizing circuit for the shift magnet in- FRANK MCBERTY eludin the holdin winding of the shift re- ARTHUR lay, whereby the s ift magnet is locked in Witnesses: energized condition after the cessation of F. T. WOQDWARD.

10 the combination of impulses. J. N. WALLACE.

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