US1193217A - Charles g - Google Patents

Description

C. G. ASHLEY.

PRINTING TELEGRAPH SYSTEM. APPLICATION FILED JULY8, m2. RENEWED JAN. 3. 1916-.

l 9 1 93., 1 '7, Patented Aug. 1, l9l6.

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CHARLES G. ASHLEY, OF CHICAGO, ILLINOIS, ASSIGNOR T0 GENERAL ENGINEERING AND CONSTRUCTION COMPANY, LIMITED, OF TORONTO, CANADA, A CORPORATION OF ONTARIO, CANADA.

PRINTING-TELEGRAPH SYSTEM.

Application filed July 8, 1912, Serial No. 708,165.

To all whom it may concern Be it known that I, CHARLES G. ASHLEY, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Printing-Telegraph Systems, of which the following is a specification.

My invention relates to automatic printing telegraph systems and contemplates an inun'ovemcnt in systems of that class in which the characters necessary for the communication of intelligence are built up of lil'lPlGSSlOllS, in proper relation and sequence, from a comparatively small number of component types representing the various component parts of the letters or numerals to be formed.

My invention comprises a system of apparatus and circuits in which substantially all the energy of the transmitted line impulse is momentarily stored through condensive reactance and thereafter automatically discharged through a local inductive circuit of comparatively low resistance, containing the receiver electromagnets, to accomplish the recording of legible characters. Thus I at tain by means of a control system of extreme simplicity, infallibility of operation even under line conditions approaching the limits of commercial practicability. I

In the figures which accompany and form a part of this specification and in which like numerals designate corresponding parts throughout; Figure 1 illustrates in diagram the circuits and apparatus at both a trans mitting and receiving station and the conductors connecting them. Fig. 2 is a magnified plan view of the printing types as they are grouped in the receiver to form the printing symbol. Fig. 3 is a diagrammatic plan view of the printing element of my receiver. Fig. 4; is a diagrammatic side elevation of the same. Fig. 5 illustrates a section of transmitting tape. Fig. 6 illustrates preferred forms of the characters of the alphabet and numerals as printed by my system.

The transmitter shown in diagram at the left of Fig. 1 comprises a pair of direct current dynamos 21 and 22 or other convenient sources of current, having terminals of opposite polarity connected together and to the ground 28. The negative terminal of Specification of Letters Patent.

Renewed January 3, 1916. Serial No. 70,076.

dynamo 21 is connected to brushes 6 and 8 while the positive terminal of dynamo 22 is connected to the brushes 5 and 7. A pair of line brushes 9 and 10 are normally held out of contact with brushes 5, 6 and 7, 8 respectively by means of a transmitting tape 21-. Brush 9 is connected to. line conductor 11 while brush 10 is connected to line conductor 12. Thus by correctly spaced perforations in the tape 24, line conductor 11 may be connected through brush 9 with either brushes 5 or 6 to send respectively positive or negative impulses of current over line conductor 11 and ground. Similarly perforations in tape 2 may be so spaced with relation to brushes 7 and 8 as to send through brush 10 positive or negative impulses respectively to line conductor 12 and ground. The t 'ansmitter thus constitutes a means for selectively sending through either line conductor and ground, positive or negative impulses of current to selectively operate the receiving mechanisms.

The receiving devices and circuits are shown in diagram at the right of Fig. 1, while the printing element of the receiver is shown in plan in Fig. 3 and in side elevation of Fig. 4. This receiving element comprises a U shaped polarizing magnet 27, one leg of which extends a distance beyond the other and is provided with a series of alined openings as 30 Four solenoids, 1, 2, 3 and atare positioned within the magnet 27 with their central openings as 1, 2, 3 and 1 respectively in registry with the re spcctive openings in the magnet 27 and are rigidly attached thereto to maintain said registry. The shorter leg of the magnet 27 extends slightly inwardly beyond the outline of the central openings of each of the solenoids 1, 2, 3 and 4. A plate of magnetic material 32 is attached to the longer extremity of magnet 27 and serves to support the pole piece 31 which. extends inwardly beyond the outline of the central openings of all of the solenoids and is maintained at a definite distance from the face of the shorter leg of magnet 27 to provide a definite air gap for the polarizing magnet. One extremity of each. of a series of bell-crankshaped armatures 1 2 8 and 4" pass through their respective apertures in magnet 27 and the hollow central. portions of their respective operating solenoids 1, 2, 3 and 4;

and extend through the air gap of magnet 27. A. pivot pin passes through all of the armatures and is pivoted in two journal blocks as 3O avl1icl1 are in turn rigidly attached to the under surface of magnet 27.

A printing type as 1 2 3* and 4* is borne as an integral part thereof upon each extremity of 'tl'lGitlHlttlllll'GS 1 2 3 and 4: respectively, which lie without the operating helices and these extended portions of the armatures are bent to bring their respective type faces into such relation to each other as to form the printing symbol shown greatly enlarged in Fig. 2. An anvil 28 is placed adjacent to all of the printing types and is adjustable in its distance therefrom by means of a screw 29. A. receiving tape 30 rests on the anvil and is drawn longitudinally by any well known means between the anvil and the printing types, while a strip of impression or carbon paper is inter posed between the tape and the types to allow of recording impressions therefrom upon the tape.

Referring now to the receiving elements and auxiliary apparatus as shown in Fig. 1, the windings of relays 13 and 1 1 are interposed I between line conductors 11 and 12 respectively and ground, the back contacts 15 and 16 of the relays being connected to the line conductors 11 and 12 respectively. The armatures 15 and 16 of the relays are connected to one terminal of each of the condensers 17 I and 18 respectively the other terminals of'the condensers being connected to the ground as indicated. Solenoids 1 and 2 controlling armatures 1 and 2 and consequently printing types 1 and 2 are connected in series, with their magnetic poles in rotation and to the front contact 15 of relay 13 and also to the grounded terminal of condenser 17, while the solenoids 3 and i controlling printing types 3 and 1 are likewise connected, in series with their magnetic poles in rotation, and to front contact 16 of relay 141 and to the grounded terminal of condenser 18.

As the armatures of the relays normally rest on their respective back contacts, the condensers 17 and 18 are normally bridged 0n the line relays 13 and 14 respectively. Thus a positive or negative impulse of current traversing line conductor 11 and ground, charges condenser 17 to the potential of the line impulse and thereafter energizes relay 13 to pull up armature 15 thereby breaking the contact 15 and making contact 15 to discharge condenser 17 through the local circuit containing operating solenoids 1 and 2. The direction of the discharge through the solenoids depends upon the polarity of the impulse over line conductor 11 and ground.

The polarizing magnet 27 of the printing element of the receiving device normally maintains all of the armatures, 1 2 3 and 4 with the upper extremities against the pole face of its shorter leg, thus normally restraining the type faces 1 2 3 and 1", from contact with the impression paper 30 Solenoids 1 and 2 are so wound that an impulse of current traversing their helices in series induces unlike magnetic poles upon their extremities while solenoids 3 and 4-. are likewise so wound that an impulse of current through their helices in series produces unlike magnetic poles, on their extremities, hence a positive impulse of current through solenoids 1 and 2 will reverse the polarity of one of their inclosed armatures as 1 from that polarity created therein by the polarizing magnet 27 and the armature will be repelled by the hitherto attracting pole face of magnet 27 and will be urged by influence of its operating solenoid and the opposite pole piece 31, to move toward pole piece 31, thus causing the printing type 1 to strike the impression paper and record an impression of type face 1 upon the receiving tape. The energization of solenoid 2 by a current impulse of positive potential causes normal polarity of its inclosed armature 2 to be accentuated and the armature is therefore more strongly held against the polarizing magnet, thus maintaining the type face 2 out of contaee with the impression paper. Similarly a negative impulse of current may be sent through solenoids 1 and 2 to ground to imprint type face 2 In a like manner a D081- tive impulse of current through solenoids 3 and 41 imprints type face while a negative impulse through the same helices imprints type face 45*.

Thus by means of impulses transmitted over line conductors 11 and 12 and ground, condensers 17 and 18 may he charged to the full line potential and discharged through. the solenoids 1 and 2 or 3 and 4; respectively to selectively imprint either type face 1, 2, 3 or 4; dependent upon which line conductor the impulse traverses and upon the polarity of the impulse.

A transmitting tape 24:, a portion of which is shown in Fig. 5, is used to select the proper line and potential of impulse to correctly build up the impressions from the type faces to form legible English characters. In the tape, the perforations are spaced longitudinally along four transversely spaced rows 1 2 3 and 4: correspoi'iding to the lines of contact between brush 9 and brushes 5 and 6 and brush 10 and brushes 7 and 8 respectively, thus a perforation in the tape, on line 1", allows contact to be made between the positive terminal or grounded dynamo 22 through brush 5 and brush 9 and line conductor 11 to transmit a positive impulse of current to condenser 17 and the helix of relay 13, and thus charges condenser 17 and thereafter discharges the condenser through the solenoids 1 and 2 to imprint type face 1. Similarly perforations along the lines 2", 3 and l operate to imprint type faces 2 3 and 45* respectively.

It remains now to disclose the method of building up the impressions from the type faces to form legible characters. Referring to 2, it will be noted that the width of a complete normal character such as A is equal to the width of the type faces 1 or and that this width is divided into eight equal units, each of the type faces being sep arated from its adjacent type face by one of these units of width.

'l.he longitudinal spacing of the perforations in the transmitting tape is dependent upon the ratio between the speed of the transmitting and receiving tapes and is such that while the receiving tape moves one unit of width of a complete normal character, the transmitting between any two transverse lines as and 2 3 on the tape.

he character A is transmitted and re 5 as follows: Conceive the transmittape 21:, .ierforated as shown in Fig. 5 to move to 21rd the left as viewed in the figure, between the brushes 9, and 5, 6, 7 anu 8 of the transmitter Fig. l at a speed which allows one transverse spacing of the apo to pass the contact line of the brushes while the receiving tape is being drawn from right to left under the type faces as viewed in Fig. 2, a distance equal to one unit of width or one-eighth of a complete normal character, then a perforation in the transmitting tape spaced on the line 43 and on the transverse line 41 allows contact to be made between brushes 8 and 10 to send a negative impulse of current over line conductor and ground, which as hitherto explained, records an impression of type face 4 on the receiving tape 30. After the transmit ting tape has moved eight transverse spaces and the receiving tape has moved the width of a complete normal character, a perforation in the transmitting tape spaced on the lines 4" and 43 again allows contact to be made between brushes 8 and 10 to send a negative impulse over line conductor 12 and ground to imprint type face l upon the receiving tape a distance away from the pre vious impression which is equal to the width of a normal character. After the transmitting g' tape has moved two additional tape units, a perforation in the transmitting tape along the lines 2 and 23 allows contact to be made between the brushes 9 and (3 to send a negative impulse of current over line conductor 11 and ground which operates type face 2 to record an impression on the receiving tape. As the receiving tape has moved since the last impression of type face 4 a distance of 2 units of width or one-quarter of a normal character, this impression of type face 2 abuts at its tape moves the distance two extremities the middle portions of both of the previous impressions of type face at. After the transmitting tape has moved an additional transverse unit during which time the receiving tape has moved oneeighth of the width of a normal character, a perforationiu the transmitting tape placed on the lines l and 73 allows a positive impulse or current to be sent over line conduc tor 11 and ground to operate type face 1 the impression of which abuts at its right horizontal extremity with the top of the last lli'lPl'BSSlOll of type face i while the vertiil leg of the imprint of the type face registers with the upper half of the first impres- 'on of type face to complete the characl' Similarly all of the characters of the alph: bet and the nun'ierals from O to 9 may be t up and recorded. as shown in Fig. (3. it will be observed from the foregoing that the transmitting speed may be made ch that the line impulses are of comparavely long duration to overcome thus their attenuation when received over a busy line, and that the coi'idenser may be thus charged during a comparatively long time interval with a current of compa atively low intensity and thereafter discharged through an inductive path of low resistance at a comparatively high intensity, thus insuring a h' h intensity of current through the opating solenoids to operate the type faces ei quickly to produce a quick blow for printing, even under line conditions which approach the limits of operation for telegraph instruments.

li hile l have disclosed but one embodiment of my device, it is to be understood that may make numerous changes in the details thereof, without departing from the spirit or narrowing the scope of my invention.

Having thus described my invention, what I claim as new and desire to secure by United fi tates Letters Patent is as follows:

1. In a printing telegraph system, a pl urality of electromagnets, a plurality of printing type actuated by said electromagnets, condensive means for receiving and momentarily storing current impulses and further means for discharging said stored impulses through said clectromagnets to se lcctively operate said printing type.

In a printing telegraph system, a plurality of solenoids, a plurality of printing type actuated by said solenoids, condensive means r receiving and momentarily storing current impulses and further means for discharging said stored impulses through said solenoids to selectively operate said printing type.

3. In a printing telegraph system, a trans mission line, means for cuer izing said line with current impulses in predetermined code, condensive means for receiving and storing the energy of said impulses, a plurality of solenoids, a plurality of printing.

types actuated by said solenoids, means for discharging the energy of said stored impulses through said solenoids, to selectively operate said printing type.

i. In a printing telegraph system a transmission line, a relay associated with each conductor of said line, a condenser associated with each of said relays, a pair of solenoids associated with each of said condensers, a printing type actuated by each of said solenoids, means for charging said condensers by current impulses of variant polarity and thereafter actuating said relay to discharge said condensers through said solenoids to actuate said printing types.

5. In a printing telegraph system, a transmission conductor, a transmitter for impressing upon said conductor an electrical current, a receiving printing device, and condensive means for changing the energy received from said transmission conductor into a current of greater instantaneous value and a shorter time duration.

6. In a printing telegraph system, a receiver responsive to short impulses oi current, a transmission line, a transmitter adapted to transmit impulses of current over said line, and a condensive translator of current impulses operating to store and transform the received line-circuit impulses into local-circuit impulses of higher instantaneous current value than the received line-circuit impulses.

7 In a printing telegraph system, a plurality of electromagnets, a plurality of printing types, actuated by said electroinagnets, condensive means for receiving and storing a current impulse, a further means for discharging said stored energy through said electromagnets at a greater instantaneous value than the received current.

8. In a printing telegraph system, a plurality of electromagnets, a printing type actuated by each electroinagnet, a line-circuit, a condenser for receiving and storing energy from said line-circuit, and a relay for discharging the stored energy of said condenser through said electromagnets at a greater instantaneous current value than the received current.

9. In a printing telegraph system, a plurality of electromagnets, a printing type actuated by each electroniagnet, a line-circuit, a condenser for receiving and storing energy from said line-circuit, and a relay for dis charging the stored energy of said condenser through said electromagnets at a greater instantaneous current value than the received current, said relay operable over said linecircuit after said condenser is charged 10. In a printing telegraph system, n pl 11- rality of low resistance solenoids, a printing type actuated by each solenoid, a line circuit and condenser for receiving current from said line-circuit and for storing the energy thereof, and a high resistance relay as compared with the resistance of said solenoids and operable over said line-circuit after said condenser has been charged and operating to discharge the stored energy of said condenser through said solenoid at a higher instantaneous current value than the current received from the line.

11. In a printing telegraph system, a plurality of low resistance solenoids, a printing type actuated by each solenoid, a line circuit, and a condenser for receiving current from said line circuit and for storing the energy thereof, and a high resistance relay as compared with the resistance of said solenoids and operatin to discharge the stored energy of said condenser through said solenoids.

Signed by me at Toronto, county of York, and Province of Ontario, in the presence of two witnesses.

CHARLES G. ASHLEY.

Witnesses Var. J. Hnnmmiv, H. M. CIIRIS'LMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Yatents, Washington, D. C.

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