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Type-writing-telegraph system.

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Publication number
US1283147A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
row
main
connected
keys
transverse
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Frederick Ghio
Original Assignee
Jerome Vaccario
Frederick Ghio
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L17/00Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
    • H04L17/16Apparatus or circuits at the receiving end

Description

F. GHI() TYPE WRITING TELEGRAPH'SYSTEM.

APPLICATION FILED MAR. 9. |913.

2 SHEETS-SHEET 2.

Patented Oct. 29, 1918.

FREDERICK GHIO, OE BRISTOL, CONNECTICUT, AssIeNoR or ONE-TENTHfTO JEROME VCCARIO, OF NEW BRITAIN, CONNECTICU'L TYPE-WRITING-TELEGRAPH SYSTEM.

Specification of Letters Patent... Patented Oct. 29, 1918.

Application led March 9, 1918. Serial No. 221,400.

To all whom t may concern.'

Be it known that I, FREDERICK GHIO, a citizen of Italy, residing at Bristol, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Type-Writing-Telegraph:

Systems, of which the following is a specificatlon.

My invention relates to improvements in type-writing telegraph systems wherein a type-writer of special construction for closing certain electrical circuits is used for the transmitting device and serves to operate a type-writing device at the receiving station for writing the message, and the object of my improvement is to produce a system that operates in a simple and reliable manner and by the use of twoline wires only -for connecting the sending and receiving stations.

In the accompanying drawing Figure l is a diagrammatic plan view of my improved type-writing telegraph systema Fig. 2 is a planview, on an enlarged scale,

' of part of the transmitting apparatus shown in Fig. Fig. 3v is a plan view of part ofthe receiv- -ing apparatus shown in Fig. 1.

In the representation of my improved type-writing telegraph system shown in the drawing, which is diagrammatic throughout, the apparatus at the transmitting station is designated by the-character T, and which includes the electric generator Cr, and the apparatus at the receiving station is designated by the character It, and the two stations are connected by two line wires designated respectively by the characters B and C and` through the ground by means of ground connections g provided at the transmitting station for one side of the generator- G and at the receiving station for the ends of the two line wires B and C.

Key-boards 10 and 11 are provided, one at each station, having similar arrangements for the keys and similar markings therefor, the markings corresponding to the letter or character to be transmitted and conforming in general to the markings used in typewriters, including double marking for the keys with suitable shift and shift release, and the keys at both the sending or transmitting and the receiving stations operate type-writing devices simultaneously while coperating in the sendin n of a message. That is to say, at the sen ing station there are paper operating devices that are operated after. the manner of operation in type-writers generally or in any proper or suitable manner so that a type-written record of the message as transmitted is obtained, the keys functioningas type-writer keys simultaneously While functioning as transmitting devices. The function as a transmitting device in the present instance comprises the selective closin of ,certain electric circuits. At the receiving station the keys function to selectively operate to the opera-tion of the corresponding keys of the transmitting station and in so doing they serve to produce a type-written record of the message. V

The present. invention pertains to the feature of'the selective operation of the keys.

As a detail in the arrangement of the keyboards I arrange the keys in parallel rows both longitudinally and transversely and with the same number of keys in each row as shown being seven in each row. Thus the keys are arranged in the form of a square that is formed by a total of 49 keys.

y Cooperating with the keys of each row, th in the longitudinal .and the transverse direction, is a resistance 12 or 12', at the transmitting station and at the receiving station there is a relay 13 or 13 for each row.

The rows of keys at both stations are numbered for convenience consecutively from 1 to 7 inclusive from left to right for the longitudinal rows and from 1 to 7 inclusive for the transverse rows and any individual key may be designated by the intersection of particular rows. rllhus the marking for the key at the intersection of rows 3 and f1 or briefly, 3, 4, as shown, is Si Considering the details of the individual keys at the transmitting station T, each of these comprises the tip 111 at the upper end with the proper marking, as shown in full lines in Fig. 1 andin broken lines in Fig. 2, and below the said tip 14 there is a circuit closing device or switch for producing a double circuit closing effect-composed or" a Contact arm 15 anditwocontacts 16 and 1'?.

rIhe Contact armor switch arm l5 is in each case connected to the ungrounded main 18 from the generator G. That is to say, all of the contact -arms 15 are connected to the generator.

row and all of the resistances 12 are con-v The different contacts 16 and 17 are conother of the'line wires B and C.

Thus the contacts 16 for each longitudinal row, such as/1 or 7, are connected to a common short main 19 which is c onnnected to the resistance 12 adapted-to the particular nected to the main B.

Similarly in the case of the transverse rows the contacts 17 of each transverse row, such as 1' or 7', are all connected to a common short main 19', which in turn is connectedA to the individual resistance 12' adapted to the particular row, and all of the resistances 12', which may be designated as transverse row resistances, are connected to the main C.

. Considering the details ofthe individual keys at the receiving station, these comprise the tip said tlp is a magnet which is designated in Fig. '3 diagrammatically by the coil 20.

The coils 20 have their'two terminals connected by short mains arranged to correspond to the lay-out of the keys in rows',

there being one such short main for each longitudinal row and one for each transverse row, one terminal being connected to a longitudinal short main and the other to a transverse short main.

Thus, as shown in Fig. 3, one terminal of the coil 20 is in each case connected to longitudinal short main 21 that is common to all of the coils 20 in the same longitudinal v 4. row, and the other terminal is connected to a transverse short main 21' that is common to all of the coils 20 in the same transverse row: Y

Each short main 21, 21 terminates in a contact point 22, 22 that is part of the relay structure of the'relay 13, 13' of the particular row.

The contact points 22, 22' are normally out of contact with the moving arm or moving part 23, 23' of the relays 13, 13' and they make contact therewith when the magnet portion 24, 24' thereof is energized.

Considering the relays 13, 13', these are similar and comprise in each'A case the magnet 24, 24', the armature 'operated thereby and incorporated inthe structure of the swinging` arm 23, 23', the spring 25, 25' that tends to draw the swinging arm 23, 23

away from the magnet .24, 24', the contact points 22, 22' already mentioned as normally out of contactwith the swinging arm 23, 23', and the cont-act point 26, 26' on the opposite side of the swinging arm from the contact point 22, 22' and normally held in contact with the said swinging arm' by the action of the spring 25, 25'. A

' Considering the positioning of the relays, there is a relay in each longitudinal row and 14 at the upper end and below the one in each transverse row, the selectivel feature of each relay being the contact point 22, 22 at the end of the short main 21, 21'. The relays 13 are arranged in atransverse row above the keys in the receiving station, as shown in Fig. 1 and when 'individually energized they connect the short main 21 ofthe row corresponding to the particular relay to the particular relay arm 23 and thereby connect one terminal of -all of the magnet coils 20 of the particular row to the said relay arm 23.

The relays 13' arearranged in a longitudinal row at the right of the keys and they serve in a manner similar to that described above when individually energized to connect the other terminal of all of the magnets 20 in the particular transverse row to the corresponding relay arms 23'.

The magnet coils of all of the relays in one row are connected in series and are in the circuit of'onerof the main lines.

, Thus, as shown, the coils of the magnets 24 of the relays 13 are connected in series and are in circuit with the main line B and the magnets 24' of the relays 13' are connected in series and are in circuit with line wire C. v

The return circuits for the line Wires B and C to the generator in each case is through the ground by means of the ground connections g. t

The individual magnets 20, as will be noted, are each a member of a longitudinal row vof magnets and also a member of a transverse row, being positioned at an intersection oftwo such rows, and they have one terminal connected to the corresponding longitudinal short main and the other to the corresponding transverse short main, and these mainsare normally each open circuited at the corresponding relay, and to complete the circuit through each magnet coil 20 the verse row must be operated.

All of the relays 13, which may be designated as the longitudinal relays, receive the same current, but have their springs 25 adjusted so that they respond to different current strengths, the relay 13 at the end of the row 1, the first at the left, being adjusted to respond to the Weakest current, the relay 13 at the end of row 7, the oneat the extreme right, being adjusted to respond only to the strongestcurrent of all, and the intermediate relays 13 being graduated in their adjustments in order between the limits of row 1 and row 7.

In a similar way the relays 13' receive the same current and they are adjusted so that the relay in the bottom row 1 responds to the weakest current of all and the relays above this are graduated in their adjustrelay 13' at the end of the particular transv ments in order so as to respond to higher current stren hs only with the relay 13 in thel top row adjusted to respond only to the maximum quantity of currentof any and all in the row.

The relays 13 and 13 by the movements of theircontact arms 23 and 23 between the normally open contacts 22 and 22 on the inner or magnet sides of the said arms and the normally closedcontacts 26 and 26 on the outer or spring sides of the said arms control the selected 'admission of current to the key magnets 20 in a local circuit that is supplied with current from a suitablesource of current, such as the battery 27, one set of relays serving to make connection to one lead from the said battery and the other set making connection to the other lead. The battery lead is connected to the contact arm of the end relay and the current is conducted further successively through the outer contacts 'to the next contact arm inthe series up to and through the particular arm whose relay coil happens to be energized so that contact is made between the said particular arm and the corresponding inner contact instead of the outer contact. Thus the remaining contact arms in the row are cut out of the circuit and in lieu thereof connection is made to an entire row of key magnets through the corresponding short main.

Thus, as shown, the positive lead of the battery 27 is connected to the contact arm 23 of the relay 13 at the right hand end of the row of relays, being the one in the longitudinal row 7, and the outer contact 26 that coperates with the said arm is connected `by ashort lead 28 with the contact arm 23 in the next row, which is longitudinal row 6, and the successive outer contacts 26 and arms 23 are interconnected in a similar manner.

ln a similar manner the negative lead from the battery 27 is connected to the contact arm 23 at the top of the row ci relays 13 that are positioned individually at the ends of the transverse rows ci keys and key magnets 20, or row 7, and short leads 28 connect the outer contacts 26 successively with the following arms 23 of the series. Also thel current is led through successive arms 23 and Contact points 26 up to and through the particular contact `arm that happens to be shunted from its' normal position by reason of the energizing of its relay magnet. Thence the current is shunted along the corresponding transverse short main 21 and may pass along the coil of any one of the key magnet coils 20 of the row to the corresponding longitudinal vshort main 21.

rl`hus the energizing of a particular key magnet 20 and the operation or the particular key connected therewith are edected by energizing two relays, one being in the corresponding longitudinal row andthe other in the corresponding transverse row, the magnet 20 that is operated being at the intersection of the two particular rows.

The selective operation of the relays'is controlled by means of differences in the resistances 12 and 12 that are positioned in series with the different short mains 19 and 1.9 of the transmission apparatus.

These resistances are adjusted so that in the case of the lon itudinal short mains 19 the one at the left, 1n row 1 is the maximum of the set and the other resistances 12 to the right in order are successively of less resistance, the resistance 12 in row 7 at the right being the minimum. All the resistances '12 are connected to main B, as mentioned, which connects with relays 7 to 1 inclusive. `Thus impulses of seven different degrees of strength may be Sent through these particular relay coils along main line 13,'depending in each case upon the particular longitudinal row of the particular transmit-ting key that is depressed.

The gradation of the relay springs 25 has already been explained. By such gradation, while the same current passes through all of the relay coils in the row, the relay 13 in row 1 at the left responds to the weak current that corresponds to the maximum resistance 12 of row 1 of the transmitting station, the intermediate relays in order being responsive to the intermediate current values, and the relay 13 in the last row 7 to the rightbeing responsive only to vthe maximum current value of the set.

ln a similar way the resistances 12 for the di'erent transverse rows of the transmitting station are adjusted tocoperate with the spring adjustments of the relays 13 for the 105 diderent transverse rows of the receiving station, the resistance 13 in the bottom row l being a maximum for the series, that at the top row 7 being the minimum, and those tor the intermediate rows being graduated in order. Also, in a particular case of operating a lrey at the transmitting station the corresponding resistance 12 is connected through line main 'C in the circuit with all or the relays 7 through inclusive.

As described., in sending a message by the arrangement described, two line wires are used and there is a choice of seven dierent intensities or current to be sent over each wire, thus providing as a possible number 120 of combinations available of these intensitiesor impulse combinations a total of fortynine, which corresponds to the number of keys provided at each station.

Each transmitting key when depressed 125 serves to send a chosen impulse, being one oi the seven available, along main line wire and simultaneously to send a chosen impulse, being also one of a group of seven available but a di'erent group from the 130 other seven mentioned, along main line wire C.

, At the receiving station the responsive action due to the operation of the partlcular transmitting key as mentioned compr1ses the operation of one articular relay 1n mam line B and also t e operatlon of' one particular relay in main line C. The operatlon 0f these two relays serves to connectl one terminal of all of the key magnets 20 in one longitudinal row to one lead from the battery and o ne terminal of all of the key magnets in one transverse row to the other lead from the battery, and the battery circuit being closed through one key magnet only so that only one key magnet will e energized by the local battery, and this one corresponds in position to the key that 1s operated at the transmitting station. l

Therefore, in the manner described, by manipulating any of the forty-nine keys at the transmitting station the corresponding key at the receiving station will be operated by a local electric current. Also, the currentwill continue to fiow through the key magnet of the receiving station all the time that the particular transmitting key is held in the circuit closing position. I claim as my invention t 1. A type-writing telegraph system comprising in combination, transmitting keys and receiving keys similarly arranged in longitudinal rows and in transverse rows, a generator having one main grounded, a pair of line wires, a short longitudinal main for each longitudinal row of keys and a short transverse main for each transverse row of keys, the short longitudinal mains for the transmitting keys being each connected to one of the said line wires through a resistance, the short transverse mains for the transmitting keys bein each connected to the other line wire throug a resistance, a relay positioned in line with each of the rows of l keys at the receivin station, the relays in line with the longitu inal rows of keys being connected in series with one line wire, the

relays in line with the transverse rowsl of keys being connected in series with the other line wire, a magnet for each receiving key having the terminals connected one to the corresponding short longitudinal main and the other to the corresponding short transverse main, the relaysbeing double contact row so as to connect the lcontact arms for 'switch'consisting of a moving contact arm and two contact points coperating therewith, the contact arms being connected to a source of current, one resistance for each longitudinal row being connected to one of the contacts for all of the keys in the corresponding longitudinal row, another resistance for each transverse row being connected to the other contacts for all of the keys in the corresponding transverse row, all of the first mentioned resistances being connected to one main line wire and all of the other resistances being connected to another line wire.

3. A type-writing telegraph system comprising receiving means consisting of a set of keys having individual operating magnets, the said keys being arranged in long1- tudinal and transverse rows, a longitudinal relay for each longitudinal row, a transverse relay for each transverse row, the longitudinal relays being connected in series to one main line, the transverse relays being connected in series to another main line, a localbattery, the magnets in each llongitudinal row having one terminal connected to a common short longitudinal main, the magnets in each transverse row having the other terminal connected to a common short transverse main, the relays being double contact devices, and each relay being operative to alternatively connect the adjacent relay to one of the leads from the battery and ticular relay. g

FREDERICK GHIO.

US1283147A 1918-03-09 1918-03-09 Type-writing-telegraph system. Expired - Lifetime US1283147A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644033A (en) * 1950-11-17 1953-06-30 Ibm Arrangement in the distant control of typewriters
US2685611A (en) * 1950-12-15 1954-08-03 Ferranti Ltd Positional data transmitting system
US2730694A (en) * 1951-02-02 1956-01-10 Ferranti Ltd Amplitude recording system utilizing saturable core reactors
US2976520A (en) * 1955-09-20 1961-03-21 Bell Telephone Labor Inc Matrix selecting network
US3482241A (en) * 1965-08-05 1969-12-02 Aviat Uk Touch displays
US4138197A (en) * 1975-12-22 1979-02-06 National Controls, Inc. Key actuator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644033A (en) * 1950-11-17 1953-06-30 Ibm Arrangement in the distant control of typewriters
US2685611A (en) * 1950-12-15 1954-08-03 Ferranti Ltd Positional data transmitting system
US2730694A (en) * 1951-02-02 1956-01-10 Ferranti Ltd Amplitude recording system utilizing saturable core reactors
US2976520A (en) * 1955-09-20 1961-03-21 Bell Telephone Labor Inc Matrix selecting network
US3482241A (en) * 1965-08-05 1969-12-02 Aviat Uk Touch displays
US4138197A (en) * 1975-12-22 1979-02-06 National Controls, Inc. Key actuator

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