US917011A - Printing-telegraph. - Google Patents

Description

A. (L GREHURE.

PRINTING TELEGRAPH.

APPLICATION FILED .TAN.16,1905.

Patented Apr. 6, 1909.

Z SHEETS-SHEET 1.

A. C. OREHORE.

PRINTING TELEGRAPH.

APPLICATION FILED JAN.16,1905.

IWZMO 1 WiZ'nes as: y .fizven 'or:

WW Aiz Patented Apr. 6, 119%.

I printing sr'r ALBERT C. CREHORE, OF YONKERS, NEW YORK, ASSIGNOR TO TYPEWRIIING TELEGRAPH l COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PRINTING-TELEGRAPH.

Specification of Letters Patent.

Patented A rire, ieoe.

Application filed January 16, 1905. Serial No. 2 .4259.

To all whom it may concern:

Be it known that I, ALBERT C. CREHORE, a citizen of the United States, residing at Yonkers, county of WVestchester, Stateof New York, have invented certain new and useful Improvements in Printing-Telegraphs, of which the following specification and accompanying drawings illustrate one form of the invention which I now regard as the best .out of the various forms in which the inven ada )ted too crate the res ective he s of a l P H Y typewriter, are individua y selected and operated by the respective keys of a typewriter key-board at the sending station. In that system I provided,- at the receiving station, two groups of line relays, one group in each of the two line wires, and, by the simultaneous action of the two line wires, I selected and operated a pair of those relays, one from each group, which, in turn, served, by means of two secondary relays, to work two circuit closers placed in series in the local circuit of some one of-the series of or receiving magnets. In my present invention I have a similar arrange ment, except that I employ but one line wire and, by means thereof, select and o erate the two desired line relays successive y instead of simultaneously. I also-employ but six main line'relays instead oftwelve, since I make the selection of the two relays by two impulses over the same line wire for each letter, and, whereas in the former case the two impulses (on the two separate line wires) acte respectively on the two'groups of line relays, in the present casethe first ,im ulse' may act u on the six relays as be 'ore, and the secon impulse may act again on the same relays just as if they were a different group. .In one sense therefore I still have two groups of relays, the same relays'i'serving first in {the character of oneofv my former grou s, and next in the character of the other. 0 m former groups. tically, however, 1 ain the advantage of requiring but six reIays instead of twelve. In order that these six relays may act first in one character in response to the first impulse, and then in another character in re s onse to the second impulse, I rovide a s nrnr onto. j

.55 Pracevice which I designate as a trans er switch, I

that acts to give the line relays control of one or the other of two sets of secondary relays, each set containing six magnets, and two of them, one from each set, controlling the two circuit closers laced in series in the circuit of some one o the 36 printing magnets. I

also provide means for automatically operating the transfer switch, so that for the first main line impulse it will act upon one set of secondary relays, and the second impulse upon the other set.

Certain other features of novelty will appear as this descri tion is continued.

Turning to the rawings as an illustration of the system to be described, I will first consider the arrangements at the transmitting station, it being remembered that I must provide therein for the sending, for each character or letter to be selected andprinted,

of two successive impulses over a single main line. In other res ects the transmitting apparatus is substantially like that of my'l'ormer appllication, there 'bein a series of magnetica y operated contact evers, which serve to send currents of six difierent kinds diflerentiated by polarity and also by strength. I provide, as before, three difierent values of current, each of which may be of one polarity or the other, making (idifierent kinds of current in all.

Referring to Fig. 1, the transmitting ap paratus is shown mup .er part, and the receiving apparatus in t e lower Iitit of the figure, the two being connected their back stopsibyasprings. Two sources I of current,. conventionally represented as batteries, are; provided, indicated respecy the line. wire L. The line wire, entering the trans-f its front stop, it will simultaneously 'to the sections of battery tively as S and S one serving-to send positive and the other negative currents to the line L; Both batteries have one of their two terminals connected to ground permane'ntly, this being an advantageous arrangement for several reasons. The opposite terminals of the twobatteries are connected respectively to the front stops it and 7c of the several contact'l'evers aforesaid; while the front stops of the remaining levers are connected to intermediate points in the respective batteries, so as to receive therefrom an electromotive force smaller than that produced by the entire battery. Thus contact k is connected to the first battery section, and k to the secondary battery section, so as to receive respectively one-third and two-1v 'of the one operated. By this means I am enabled to transmit to the line L any one of the six different kinds of current heretofore mentioned, while between the current impulses the line L will be grounded and dis charged. This grounding of the line between the successive current impulses is a feature of practical importance in the operation of m system, which also employs current of a ow frequency, by reason of which it may be used to. advantage on telephone circuits without interfering with the simultaneous transmission of the telephone current.

' For operating the respective contact levers D .D I provide the corresponding magnets (l -d, which all have one of their terminals connected to the local battery G by the wire 7, while their opposite terminals are connected individually to the opposite termiseveral' transmitting keys.

each magnet twice, to sen nal of G by the contacts 13 16, or 1415 of the It is manifest that in operating the six magnets in groups of two each, there are 36 possible combinations, including as one grou the operation of two current im pulses of the same kind over the line wire L in succession. These 36' combinations are shown in the diagram, the first impulse being produced by closure of the contacts 13 16 andthe second by the closure of the contacts 14 15, these closures beingseparated by an intervalduring which the line is grounded as aforesaid. For example, the terminal 1 of m et d;,is connected to thewires 36 and 30,; the latter being connected to the lower' six contacts 14 and the former-being con- 'magnet 11 asecond time. On the other hand,

. tively the 36 at the point 17 and provided at one end with nected to six ofthe contacts 13 distributed as shown in the'diagram. The contacts 15 and 16 are connected by the wire X to the battery G. In a similar way the terminal 2 of magnet d is connected tothe wires 37 and 31; the terminal 3 of magnet d? to the wires 38 and 32; the terminal 4 of magnet d to the wires 39 and 33; the terminal 5 of magnet d to the wires 40 and 34, and the terminal 6 of magnet d to the wires 41 and 35, Then if we take the upper one of the vertical series of contacts, it is manifest that the closure of 13 16 will energize magnet d while the succeeding closure of contacts 14 15 will operate the taking the contacts opposite the letter X the closure of 13 16 will, through the line 38, energize magnet (1 while the closure of 14 15 through the line 33 will energize magnet d". In this manner the successive closure of the several sets of contacts will operate respeca-irs of magnets and thereby send for each etter or character transmitted a pair of succeeding current im ulses differ- 'entiated in character from al of the remaining 35 pairs. Turning to Figsy'3 and 4, I'have shown therein a-key for operating two sets of contacts in succession. The key lever is pivoted the button 20 by which it may be depressed against a stop 19. The opposite end of the lever is normally held down by a spring 18 I I against a stop 24. Near the extremity of this end of the lever is a pin 16 oval in cross 100 section projecting from one side of the lever, as shown in Fig. 3. This pin is the contact 16 which I have already referred to. Its comrade contact 13 consists 'ofa spring 13 fastened to a block 25 and normally resting 105 drop back and carry'the plate with it, so that 5 the return or downward stroke of the pin 16 will pass over the insulated side of the plate 21 and produce no electrical connection between 16 and 13. The secondvset of contacts 14 and 15 are mounted on opposite sides 120 of the block 26, the former taking the form of a s ring attached at one end to the under side 0 the block 26, and at the other end to a .block 27 on theu-pper edge of the key lever;

while the latter takes the form of a screw in 125 the end of a plate 28. The depression of the key lever by the button 20 wil first close the contacts 13 16, as already described, then break the circuit, then close the contacts 14-,

15, and then, on its-return stroke, will break 130 in- 16 rises, it will first come in 0 the connection between 14 and. 15 and the circuit will remain broken until the return stroke of the lever is complete.

.1 be a series of such key levers, 36 in number,

or as many of the 36 as one may desire to use;

and the whole will make up. a transnrfitting key board similar to the key board of. an orthe receiving apparatus up to the point where the transmission of the two impulses, in the manner just described, serves, at the receiving station, to select and operate some one pair of the secondary relays WVV "lhe manner in whiclrthese two secondary relays then select and operate some individual-printing magnet is shown in Fig. 2, being identical with the arrangement for this purpose provided in my former arrangement. At the receiving station the main line L passes through six polarized relays in series (shown at the bottom of the figure) and goes thence to ground or to another station on the same line. The first of these six relays is designated R 6, 12, these two numerals indicating'that during one of the two line impulses the relay will control the secondary relay W and during the second impulse the secondary relay W. The remaining relays are similarly designated by the numerals of the secondary relays which they respectively control at each one of the two impulses.

prefer to give these relays a permanent ad-' justment and then n aintain the line currents which pass through them substantiallyfunchanged by a shunting resistance F. By this means the different current. strengths to which the several relays res ond will be maintained unchanged. 'One alf of the six relays respond to positive currents only and the other half to negative currents only. Assuming that the left-hand three respond to positive currents, the relay R 6, 12 will alone respond to the weakest positive current. It and the next relay R 5, 11 will respond to the medium current, while all three will respond to the strongest current. The armatures of these relays are normally held against their back stops, and the local circuit from battery Pcomes by the wire 42 to the lever of relay R 4, 10 and goes thence by its backstop to the lever of It 5, 11 and thence by its back stop to the lever of R 6, 12 at which the circuit is normally broken. 7 There There will I'pre'fer, however,

- ondary relays.

R 6, 12 will alone respond and throw its To a mediunr I lever against the front stop 1. current the relay R 5, 11 will also respond, but will instantly break at its back stop, the

local circuit-connection, leading to the lever 'ofR 6, 12, so that while the latter relay may operate, itwill' have no efiect upon the local circuit. Similarly, relay R4 10 will respond' I to the strongest, current and immediately break, at its back sto thelocal circuit con nections leading to t e levers of the other two relays which will operate but have no efiect upon the local circuit. In this way, by-sending the pro er strength of positive current, any desire one of thethree relays {ust mentioned may be operated and, simiarly, by sending. any one of the three available strengths of negative current, any desired one of the remaining three relays can be selected and operated. The one of the six. relays thus selected will, on the first of the two' impulses required for the "trans-n mission of each letter, operate one of the lower sets of sixsecondary relays W' W and, on the second impulse -will operate some one of the upper set of six secondary relays Vv W '1 his difierentiation' between the relay action on the first and second impulses, is produced by means of a transfer switch M, which transfers the control ex- A.

ercised by the relays first t0 the lower set,

and then to the u per set of secondary relays.

The switch M 1s normally spring biased to the left, so as to conneet in multiple with the six contacts'leading to the lower set of sec: The circuit of battery P passes through the switch-retaining magnet m of the transfer switch M, from the lefthand contact plate of that switch, which bears "upon the six contaets'aforesaid and thereby. connectsone terminal of each of the I lower set of secondary relays to they battery P in multiple. The other terminals of these relays are connected individually and respectively to the front contacts 1 of the six line relays; 'while, as aforesaid, the levers of these relayscommunicate with the opposite terminal of battery P. Thus, in the biased position of the switch M, the several relay contact leverswill close the local ireuits of the several secondary relays VV -W', while the relay thus operated will retain its armature by the closure of a locking coil-II at the contacts", this contact being additional to contact 0 by which, as will be hereinafter explained, the relay acts oii-the printing magnets. For example, we may assume that relay R 3, 9 closes the circuit of secondary relay VV Then the contact lever of W will clogethe local locking circuit as follows: batteiy P, wire 43, contact lever of W, locking 0011 H wire 4-4, releasing sw tch B, wire 51,

shifting magnet on to the opposite terminal of battery P. This locking; circuit will refore, when a weak current flows, the relay 1 main closed until the releasing switch B is opened. by the action of one of the printing magnets J, it being understood that all the printing magnets will, at the limit of their stroke, act upon the switch B to break the locking circuit. At the same time the energizing of shifting magnet m will have a tendency, which, however, is ineffective, to move the transfer lever M. So long as the first one of the two current impulses is going over the line wire L (operating, as we have assumed, the relay R 3, 9 which operates in turn the secondary relay VI) the retaining magnet m aforesaid will remain energized and prevent the shifting of the switch M. So soon, however, as the first impulse comes to an end, the

4 relay R 3, 9 will be denergized and will open the operating circuit of W which includes also the retaining magnet m This will allow the transfer switch M to move to the right, and connect battery P to the upper set of secondary relays WVV the circuit from the battery P passing through retaining H m of the transfer-switchon its way to the contact plate of switch M to the right of the switch, just as it passed through the retain-.

ing coil m on its way to the contact plate at the left of the switch. It will be remembered that, during this time, the locking circuit,

which retains the armature of secondary relays VV is still in action. After the switch M has been shifted'as aforesaid, one of the six line relays will again be operated by the second line impulse, and will act to select and. operate one of the six secondary relays of the upper set W VV as they selected and operated one of the six secondary relays W -JV, the latter set being now open-circuited at switchM and the, former set having their circuits closed at the same oint. Thus the current from battery]? an line 42 will go to the armature lever of that one of the six relays which has been selected and will pass thence to one of the upper set, instead of to one of the lower set, of secondary relays, since the circuit leading from each armaturelever is branched to two secondary relays, one in the lower and the other in the upper set (for exam le the circuit from the armature-lever of 6, 12 branches to the lower secondary relay IN and the up er secondary relay W") and the current will one of the two relays whose circuit is closed at the switch M. The one of the upper set as the transmitting key is hel pass to that is permitted to rise at the sending station I 7 I have thus described how, for t e trans. mission of any desired letter. or character, a

key at the sending station will be depressed,

thereby sending two current impulses in Succession which have, in the manner described, selected and operated that pair of seconda relays which corresponds to the key that has been operated. In like manner each one of the transmitting keys will select and operate some one air of the 12 secondary relays W W t ere being 36 keys and 36 pairs of relays available'from the 12 relays.

In Fig. 2 I represent a series of printing 'magnets which are divided into six groups,

those in each group havingtheir terminals on one side all connected in multiple to the same wire. Thus there are six such wires 63, 64, 65, 66, 67, 68 leadin respectively to circuit closers operated by t e several secondary relays W -W which, when closed, connect them to one terminal of the battery P. The opposite terminals of the magnets in each group are connected respectively to circuitclosers operated by the several secondary relays N .W and, since there are six groups eachotthe said relays controls six ,circuit .closers one from a ma net in each of the six groups. The circuit c osers all lead, by the wire 69, to-the opposite terminal of battery P. It is therefore evident that if two secondary relays are energized, one from each of the two groups of secondary relays, they will the manner already explained. Then it will appear that W will connect wire 66 to battery P, and the wire will put all the terminals of the group of printing magnets to which it pertains in connection with the battery. But of the opposite terminals of the magnets inthis group, only one of them, to wit, that of the magnet J, leads by wire 70 (Fig. 2) to the circuit closers of W. Hence that one magnet will be energized, its circuit leading from battery 1?, by wire 66and circuit closer of W 3 onthe one side, and on the other side from the opposite battery terminal, by the circuitcloser of V2 and wire 70. In like manner, any one of the 36 printing magnets may be selected and operated by the action of two secondary relays, one from each group or-set, and thetwo secondary relays will, in turn, be selected and operated by the energizing of two primary or line relays, while the two primary relays will be selected and o 'erated in the manner I have described by t e sendin of two current impulses in succession over t e line wire L, by the de ress on of some one of the 36 transmitting eys at thesending station. In efleet, the individual amen magnets of the series of recording or printing magnets are selected and operated by the two succeeding current impulses, through the intervenin agencies I have described.

which require three or more succeeding im pulses to print a character or perform a corresponding operation and also from other arrangements which require a variable number of impulses for the different characters. Wherever in the following claims I refer to a receiving magnet, or to a pair of line relays, or to a pair of succeeding current impulses, corresponding to a letter or character of the transmitted message, it will be understood that the expression also includes such magnets and pairs of relays or impulses as may correspond to an operation like theshifting of the typewriter carriage or depression of a shift-key for-capitals.

It is to be understood that the principlesof my invention may be extended to sets of relays greater than six or may be otherwise embodied difierentlyfrom the arrangement shown without departing therefrom.

What I claim as new'gand desire .to secure by Letters Patent is: Y

1. A. telegraph apparatus comprising in combination, two line relays, aseries of receiving magnets each corresponding to a letter or character of the transmitted message and each selected and operated by the said relays, means for-energizing the two relays in succession from a sending station by succeeding impulses over a single line wire, and means consisting of a separate relay coil and contact for maintaining the effect of the first impulse until the second impulse has occurred. l

2. A telegraph apparatus comprisin in combination, two line relays, a series 0 receiving-ma-gnets each correspondin to a letter or character of the transmitte message and each selected and operated by said relays, means for successively energizing the two line relays by succeeding impulses over a sin le line wire, and-a series of transmitting eys corresponding each to one of the several receiving magnets and each single key controlling the transmission of two succeeding current impulses.

3. telegraph apparatus comprising in comb1nat1on, a series of receiving magnets each corresponding to a letter or character of the transmitted message and each selected and operated by two succeeding current impulses over a single line, each pair of impulses diflering from other pairs as regards strength or polarity, and means for transmitting such impulses in succession from a sending station.

' 4. A telegraph apparatus comprising in combination, a series, of receiving magnets each corresponding to a letter or a character of the transmitted message and each select ed and operated by two succeeding current impulses over a single line, a series of trans mitting contacts at the sending station controlling the strength and polarity of the currents to be transmitted, operating magnets for said contacts, and means for operating two of said contacts in succession'for each letter or character in the transmitted mes sage.

5. A telegraph apparatus comprising in combination, a seriesof receiving magnets selected and operated respectively by two succeeding current impulses, each of such pairs of impulses corresponding to a letter or pulses, of means for transmitting the desired pairs of impulses comprising six normally closed circuit breakers in series in the main line leading from the sending to the receiv ing station, and a normally open contact for each'of said circuit breakers connecting with a differentiated source of electromotive force, with which contact the circuit-breaker connects at each operation to transmit a differentiated impulse overg'the line.

7. In a telegraph system, the combination with a series of receiving *magnets selected and 0 erated respectively by two succeeding and erentiated current'impulses from the sending .station, of means for transmitting said impulses in pairs differentiated by polarity or strength from one another, comprising a series of normally-closed circuit reakers in the main line, a'corresponding number of sources of electromotive force differentiated by strength and polarity having their connection with the .main line controlled by said circuit-breakers, magnets for magnets and controlling the circuit-breakers in pairs.

' receiving station.

and operated respectively by a set of two succeeding current impulses differentiated from other sets in strength or polarity, of means for transmitting the differentiated sets comprising sources of electromotive force having d' e one terminal permanently connected to ground or to the opposite side of the line, circuit-breakers in series normally closing the line through the transmitting station and means for simultaneously opening a circuit breaker and connecting the free terminal of one of said sources of electromotive force to the line leading from the transmitting to the 10. In a telegraph system, the combination with a series of receiving magnets selected and o erated respectively by a set of two succee' ing current-impulses difierentiated from other sets as to strength or olarity, ofmeans for transmitting the differentiated sets comprising six different sources of electromotive force, six normally-closed circuit-breakers in series in the line, and a contact for each circuit-closer connected to one of said six sources of electromotive force for connecting one of said sources to line simultaneously with the opening of a clrcult closer.

11. In a telegraph system, the combination with a series of receiving magnets each corresponding to a letter or character of the transmitted message and each selected and operated respectively by a set of two succeeding current impulses differentiated from other sets by strength or polarity, of a line wire, a series of transmitting contacts,

sources of electromotive force differing in strength and polarity and controlled by said contacts, magnets operating said contacts,

and normally-open keys each controlling in succession a set of said magnets and pro vided with one-way contacts engaging dur ing one of the two directions of movement of the key. 7

12. In a telegraph system, the combina- 'tion with a series of receiving magnets each corresponding to a letter or character of the transmitted message and each controlled respectively by a set of two differentiated current impulses transmitted in succession over a single line,'a series of line relays respondrent values and polarities Withing respectively to the several impulses, two sets ,of secondary relays acting on the circuits of the receiving magnets, and a transfer switch for placin the two sets of secondary relays alternately in the control of the control of the line relays, and means for automatically o crating the said switch.

14. In a te egraph system, the combination with a series of receiving magnets con-- trolled respectively by differentiated sets of' succeeding current impulses, of line relays, secondary relays divided into groups, a trans-- fer switch additional to said relays for placing the groups alternately in the controlof the line relays, and means for automatically operating said switch after each of the current impulses composing one ofthe sets of impulses aforesaid.

15. In a telegraph system, the combination with a series of magnets each controlled respectively by a single differentiated pair of succeeding current impulses, of line relays responding individually to currents differentiated in strength and polarity, circuit-clos ers in series in the circuit of each of said 'seriesof magnets, and means for operating said jcircuit closers respectively by the several succeeding current impulses composing one of the sets of impulses aforesaid.

16. In a telegraph system, the combina tion with a series of receiving magnets controlled respectively by a differentiated pair of succeeding current impulses on a'single line, of a set of relays operated alternately by succeeding impulses, a transfer switch and circuit closers individual to the several receiving relays controlled respectively by relays from the said'two sets.

17. In a telegraphsystem, the combination with a series of magnets controlled respectively by differentiated sets of succeeding current impulses on a single line, of a single set of line relays in series, two sets of secondary relays, a transfer switch, additional to said relays, locking devices for the relays operated by one of the current impulses composing one of the sets of impulses aforesaid, and circuit closers operated respectively by secondary relays from the two sets and controlling the said receiving magnets;

' 18. In a telegraph system, the combination with a series of magnets controlled re spectively by differentiated sets of succeed- .and operating the circuit closers of sai( ing current impulses, of circuit closers of said magnets, relays responding to said impulses magnets, a transfer switch additional to said relays, for utilizing said relays in succeeding groups, locking devices and releasing means for said (iGYlCGS controlled by the operatlon 9 of any one of said series of magnets.

19. In a telegraph system, the combination with a series of magnets controlled respectively by differentiated sets of succeeding current impulses, of line relays in series, two groups of secondary relays, a transfer switch, a retaining magnet for said switch energized by a preceding, and a shifting magnet therefor energized by a succeeding current impulse. I

20. In a telegraph system, the combination with a series of magnets controlled respectively by differentiated pairs of succeeding current impulses on a line, of line relays, two sets of secondary relays, a transfer switch, means for shifting said switch on the completion of one current impulse on the line and for returning it on the completion of the succeeding current impulse.

21. In a telegraph system, the combination of two sets of magnets each set containing SIX or more magnets, means for selecting and operatmg one only of the first set of magnets by the electrical impulse first re ceived and one only of the second set of mag.

nets by the second electrical impulse received, a series of receiving magnets controlled each by a single pair of magnets selected and operated as aforesaid, and means for automatically restoring the apparatus to its original condition after the second impulse.

22. In a telegraph system, the combination of a set of main line relays responding to distinctive currents, a line wire over which two successive impulses only are re uired to transmit a character, of two sets 0 secondary relays each equal in number to the said main line relays, means for automatically disconnecting the first said set of secondary relays from the main line relays and connect ing the second said set of secondary relays to the said main line relays after the first electrical impulse has terminated, and means for automatically disconnecting the second said set of secondary relays from the main line relays and connecting the first said set of secondary relays to the said main line relays after the second said main line impulse has terminated, as and for the purpose described.

23. In a telegraph system the combination of main line relays, two sets of secondary relays, each siX or more in number, an electromagnetic switch having three inde pendent coils, and controlling the operation of said sets of relays, one of said coils receiving current during the time the contacts of any of said main line relays remain closed for the first main line impulse, the second of said coils receiving current only during the time that the contacts of any of said-main line relays remain closed for the second main line impulse as and for the purpose described.

24. In a telegraph system the combination of main line relays, two sets of secondary relays, each six or more in number, a magnetic switch controlling the operation of said sets of secondary relays having indeendent coils, the current in one of said coils eing controlled at some of the contacts of said main line relays during the first impu se only, and the current in the second one of said coils being controlled by some of the contacts of said main line relays during the second successive main line current impulse only, as-and for the urpose described.

In witness whereof f have hereunto set my hand before two subscribing witnesses the third day of January, 1905.

ALBERT C. CREHORE.

Witnesses:

L. T. SHAW, M. A. MODER.

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