US1110376A - Automatic telegraph system. - Google Patents

Description

D. H. CAMERON.

AUTOMATIC TELEGRAPH SYSTEM.

APPLICATION FILED AUG. 21, 1913.

THE NORRAS PKILTRS co.. PHOTO-LITHQ. WASHINGTON, n c

DUNCAN HENRY CAMERON, OF NORTH SYDNEY, NOVA SCOTIA, CANADA.

AUTOMATIC TELEGRAPH SYSTEM.

Specification of Letters Patent.

Patented Sept. 15, 1914.

Application filed August 21, 1913. Serial No. 785,874.

To all whom t may concern.'

Be it known that I, DUNCAN H. CAMERON, a subject of the King of Great Britain, and a resident of North Sydney, in the Province of Nova Scotia and Dominion of Canada, have invented a new and Improved Alltomatic Telegraph System, of which the following is a full, clear, and exact description.

This invention relates to telegraph systems of the automatic type whereby the incoming signals in the form of dots, dashes and spaces are automatically recorded.

The general objects of the present invenf tion are to improve and simplify telegraph systems of the character referred to so as to be more reliable, efficient and expeditious in service; comparatively inexpensive to manufacture, install and keep in repair; and so designed that only one operator is required to operate the apparatus in receiving a message from one distant station and transmitting it to another distant station.

According to the automatic telegraph systems now in use a large number' of employees are required to receive and transmit a message, since in one system the incoming message is automatically received on ay tape by means of ink dots and dashes, and this tape after passing through several hands in conformity to the office methods in vogue, finally reaches the puncher who operates the perforator, and from the original tape the message is rcpunched in Vv'heatstone or cable signals, as the case may be, and the punched tape placed in a transmitter' for transmitting the message automatically to the distant receiving station.

i\.ccording to another system, the manual repunching of the message at the intermediate station is done away with, as this rey c the electro-magnet 8 1s energized.

punching is accomplished by apparatus operating by compressed air and electricity. Even with such a system, three or four attendants are required to operate the station, and besides the installation is very costly and the up-leep expense considerable.

It is the aim of the present invention to overcome the difficulties in the present systems by providing automatic tape perforating means whereby the incoming message can he directly recorded on the tape without the use of ink or other printing devices, and' with the service of only one attendant.

For a detailed understanding of the invention reference is to be had to the accompanying drawing taken in connection with the following description and appended claims.

In the accompanying drawing, which illustrates one embodiment of the invention, the figure is a diagrammatic view of the automatic perforating means employed in telegraph systems at any point where it is necessary to transmit to a distant station a message received from another distant station.

Referring to the drawing, A designates a polarized receiving relay which is connected with the telegraph lines running to some distant station from which messages are transmitted to another station so remote that the messages cannot be sent directly but require the assistance of an intermediate relaying station. This receiving relay A is connected with an ordinary tape perforator B in which the tape 1 is perforated by the punching means 2, such punching means being controlled by the armatures 3, t and 5, which respectively produce the dot, dash and space perforations in the tape, said armatures being actuated respectively by the electro-magnets 3a, 4a and 5a. As this type of pert'orator is well known a more detailed description and illustration are deemed unnecessary. The receiving relay A comprises a movable contact 6 which has an armature 7 arranged between oppositely-disposed electro-magnets 8 and 9 which are connected respectively with the telegraph lines l0 and 1l, and also connected together. Coperating with the movable contact 6 are fixed contacts 18 and 14 so arranged that when the electro-magnet 9 is energized the movable contact 6. will engage the contact 13, whereas the movable contact 6 will engage the contact 14 when Incoming dot and dash signals are produced by current of one polarity and space signals by current of opposite polarity. Consequently the dot and dash currents are transmitted through the perforator by only 011e set of contacts, namely, the contacts 6 and 13, and by reason of this it is necessary to employ a novel arrangement of electrical devices whereby the dot perforating armature can operate at the proper time and the space perforating armature can operate at its proper time. A dot cut-in and cut-out polar relay C is used to control the dot and dash l other terminal of such source being concircuits, such relay consisting of an unbiased armature 15 which is operated on by an electro-magnet 16 when dot currents are flowing, and by an electro-magnet 17 when dash currents are fiowing. The armature 15 constitutes a movable contact which is adapted to engage a fixed contact 18 in one position and a back stop 19 when in the other extreme position. The contact 18 is connected by a wire 20 with a source of current 21 which is in turn connected by a wire 22 with the electro-magnet 3a of the dot perforator armature. A wire 23 connects the electro-magnet 3a to the contacts 24 and 25 of a dot current responsive relay D, and through a wire 26 with the movable contact 15 of the relay C. When this circuit is completed the perforator will cause a dot to be perforated in the tape, it being understood that a dot current is received over the line 11 to actuate the receiving relay. This received dot current completes a circuit consisting of a source of current 27, wire 281 contacts 13 and 6, wire 29, electro-magnets 30 of a dash current responsive relay E, wire 31, coil 16, wire 32, electro-magnets 33 of relay D, wire 34 and battery 27. The energizing of the coil 16 attracts the armature contact 15 so that the latter will engage the fixed contact 18. The energizing of' the relay D separates the movable contact thereof' from the xed contact 24, while the energizing of the dash current responsive relay D is without any practical effect. As soon as the incoming dot current ceases the contact 25 of the relay D returns to closed circuit position, and the armature contact 15 being unbiased remains in engagement with the contact 18. Current consequently flows through the circuit in which the dot perforator electro-magnet 3a is a part. During the recording of a dot the current flowing through the electro-magnet 30 of' the relay E attracts the armature contact 35 into engagement with the fixed contact 36 of such relay, but this contact is so short and the nature of the circuit controlled thereby is such that the dash perforator electroiagnet 4a will not be operated.

li'hen a dash current is received by the rcciving relay A, the dash responsive relay l becomes fully responsive and maintains the contact 35 long enough in engagement with the contact 36 that the dash perforator of the apparatus B will be operated. While the dash is recorded the dot perforator must not operate, and accordingly means is provided for opening the dot per forator circuit by separating the armature contact 15 from the contact 18, this being accomplished by the energizing of the coil 17 of' the dot cut-in and cut-out relay C. This coil 17 is connected by a wire 37 with one terminal of a source of' current 38, the

nected by a wire 39 with a fixed contact 4U of a dot cut-out and dash cut-in relay F, which has a movable contact 41 connected by wires 42, 43 and 44 with the coil 17. The coil 17 being energized attracts the armature contact 15 out of engagement with the contact 18 and against the back stop 19, so that the dot perforator electro-magnet 3a is thus open circuited. The closing of the circuit that includes the battery 38 and coil 17 is effected by the energizing of the coils 45 of the relay F, such coils being connected by wire 47, battery 48, and wire 49 with the contact 36 of the relay E, and by wire 50 with the contact 35 of such latter relay. The received dash current energizes the electro-magnet 30 so that contact 35 engages contact 36 and current flows from the battery 48, wire 49, contacts 35 and 36 of relay E, wire 50, electro-magnet 45 of relay F, wire 47 and battery 48, and thereby the circuit including the battery 38 and coil 17 is closed, as hereinbefore described. The closing of this latter circuit operates an energizing relay G which controls the dash perforator circuit closing relay H, the energizing relay G having its electro-magnet 52 connected between the wires 42 and 43, and this electro-magnet operates on an armature contact 53 to attract the same into engagement with a fixed contact 54, such contacts being connected respectively by wires 55 and 56 with the electro-magnet 57 of the relay H, there being included in the wire 55 a source of current 58. By the energizing of the relay H the dash perforator electro-magnet 4a is connected in circuit with the source of current 21, such circuit consisting of the armature contact 58, fixed contact 59, wires 6() and 20, battery 21, wire wire 61, electro-magnet 4a and wire 62. As soon as the dash current ceases in the line wire 11 the movable contacts of the various relays, with the exception of the relay C, return to their normal position.

ll'hen a space current is received by the relay A a circuit is closed that contains a space responsive and dot cut-out relay I which consists of a coil or magnet 63 which has one terminal connected by wires 6l and 29 with the contact 6, and by wire 65 with a battery 66, which in turn is connected by a wire 67 with the contact 14. This electromagnet 63 is provided with an armature contact 68 disposed in coperative relation with two fixed contacts 69 and 70. The fixed contact 69 is connected by a wire 71 with the wire 44 that leads to the coil 17, and the movable contact 68 is connected by a wire 72 with the wire 39, and as a result current will flow, when the contacts 68 and 69 are engaged, through the path consisting of the battery 38, wires and 72, contacts 68 and 69, wires 71 and 44, coil 17, wire 37 and battery 38. By this means the dot perforator circuit is cut open. The contacts 68 70 cut into and out of circuit an energizing relay J which has its coils 73 connected by the wire 74 with the contact 70, and by wires 75, 76 and 77 with the contact 68, there being circuit- closing contacts 78 and 79 between the wires 75 and 76, and a battery 80 between the wires 76 and 77. The contacts 78 and 79 are'normally closed and form part of a space repeating relay K. The contacts 80 and 8l of the relay J are in series with the coils 82 of the space repeating relay K and coils 83 of the space perforator circuit closing relay L. One terminal of the coil 82 is connected with the corresponding terminal ofthe coil 83 by wires 84 and 85 and battery86, and the other terminal of the coil 82 is connected by a wire-87, contacts 80 and 81:` and wire 88 with a corresponding terminal of the coil 83. The contacts 89 and 90 of the re lay L are included in the circuit of the space perforator electro-magnet 5, such circuit consisting of the battery 21, Wires. 22, 61 and 91, coil 5a, wire 92, contacts89 and 90, wire 98 and battery 21. A space perforation will be thus perforated on the tape, one perforation serving to space Yletter signals, and three space perforations serving to separate Words. It will be understood that 'incoming space current will be of long or short duration according to whether the spaces are to be madebetween letters or between words.

' When a prolonged space current is rev ceived a plurality `of space perforations are made by the `space repeating relay K, which is energized and denergized successively during one closure of thel circuit by the contacts 68 and 70. Thissuccessive makingrr and ybreaking of-V the circuits necessary for making a plurality of space perforations in the tape will be readily appar ent, since the energizing of the electro-magnet 82 of the relay K opens the circuit of the electro-magnet of the relay J,that in turn opens the circuit ofy the electro-magnet 82, so that the latter is denergized andallows the contact 78 to engage the contact 79 and again close the circuit ofthe electro-magnet 73. This making and breaking of the cir cuits of the electro-magnets 7 3 and 82 occurs alternately as long as the received space cur` In order to simplify the diagram and insure a better understanding of the invention the various circuits have been shown with separate sources of current, but it is to be understood that a single battery may be employed to supply the current for the various circuits.

From the foregoing description taken in connection with the accompanying drawings, the advantages of the construction and method of operation will be readily understood by those skilled in the art to lwhich the invention appertains, and while I have described the principle of operation, together with the apparatus which I now consider to be the best embodiment thereof, I desire to have it understood that the apparatus shown is merely illustrative, and that such changes may be made when desired as are within the scope of the appended claims.

It is of course to be understood that re lay A is a polarized relay, and that in this case lever 6 would get its permanent magnetism from the magnet of which it is a part, magnets 8 and 9 being always energized simultaneously but according to the direction the current enters the windings of the magnet from the line wires, making the pole of magnet 8 north, and the pole of magnet 9 south, or vice versa according to the direction of current flow. It will also be evident that the incoming messages can be directly 'recorded by the actuation of automatic printers which could be operated without the use of tapes yby cutting out the perforator and then using the perforator circuits (3 circuits) to work the printer.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. An automatic tape perforating receiver for telegraph systems, comprising a receiving relay havingy a line wire connection and responsive to current of opposite polarity, a tape perforator including. dash, dot and space perforating means electro-magnetically operated, and electrical devices and connections between the receiving relay and perforator for recording on the tape dots, dashes and spaces in the order received by the receiving relay.

2. In an automatic tape perforating receiver for telegraph systems, the combination of a receiving relay for receiving dot, dash and space currents, a perforator having separate electro-magnetically operated means for perforating dots, dashes and spaces in a tape, a circuit opened and closed by the receiving relay by the dot and dash current impulses, means responsive onlv to the dot impulses to energize the dot perforator, means responsive only to the dash current impulses for operating the dash perforating means, a circuit opened and closed by the space currents passing through the receiving relay, and means controlled by the last mentioned circuit for operating the space perforating means.

3. In an automatic tape perforating receiver for telegraph systems, the combination of a receiver including relay operated by incoming dot and dash and space current impulses, a circuit closed by the said relay when responding to dot or dash current impulses, separatedot and dash current responsive relays in the said circuit, a dot cutin and cut-out relay also in the said circuit, a tape perforator including dot and dash and space perforating means, a circuit controlled by the dot current responsive relay for operating the dot perforating means, a circuit controlled by the dash current responsive relay for operating the dash perforating means and also for controlling the said dot cut-in and cut-out relay to open the circuit of the dot perforating means, a space current circuit controlled by the said receiving relay, and means responsive to the current flowing in the last mentioned circuit for operating the space pe'rforating means.

4. In an automatic tape perforating receiver for telegraph systems, the combination of a receiving relay, a circuit controlled thereby through incoming dot and dash current impulses, dot and dash current responsive relays in the said circuit, a dot cut-in -and cut-out relay having a circuitclosing magnet in the said circuit and a circuit opening magnet, a dot perforating means, a circuit therefor controlled by the said dot responsive relay and the closed circuiting magnet of the dot cut-in and cutout relay, a circuit controlled by the dash responsive relay for energizing the opencircuiting coil of the dot cut-in and cut-out relay, and a dash perforating means controlled by the last mentioned circuit.

5. In an automatic tape perforating receiver for telegraph systems, the combination of a tape perforator having separate dot and dash perforating means, a receiver for the incoming dot and dash current impulses and including a single make-and-break device, a circuit controlled by the said device, separate dot and dash current responsive relays having their magnets in the said circuit and including circuit opening and closing contacts, a dot cut-in and cut-out polar relay consisting of cut-in andl cut-out coils and an unbiased movable contact operated by said coils, said cut-in coil being arranged in the said circuit, a circuit including the dot perfor-ating means and closed by the movable contacts of the dot responsive relay when the latter is denergized and of the cut-in and cut-out relay when the cut-in coil thereof is energized, a relay controlled by the contacts of the dash responsive relay when the latter is operated only by the dash current impulses in the first mentioned circuit, a circuit controlled by the last mentioned relay and including the cut-out coil of the dot cut-in and cut-out relay for movlng the contact of the latter to open circuit position, and means controlled by the last mentioned circuit for operating the dash perforating means.

6. In an automatic tape perforating receiver for telegraph systems, the combination of a perforator including separate dot and dash perforating means, a receiving relay energized by dot and dash current impulses and including a single circuit malteand-break device, a circuit controlled by the said device, dot and dash current responsive relays having their coils connected in the said circuit and each provided with circuit controlling contacts, a dot cut-in and cutout relay having a movable and a Xed contact and also oppositely-disposed cut-in and cut-out coils lfor moving the movable contact, said cut-in coil being included in the said circuit, a circuit for the dot perforating means and including the contacts of the dot current responsive relay and contacts of the dot cut-in and cut-out relay, a. dot cut-out and dash cut-in relay having its coils connected in circuit withv the contacts of the dash current responsive relay and including circuit controlled contacts and operated only when dash current impulses pass through the dash current responsive relay, a circuit controlled by `the contacts of the last-mentioned relay and including the cut-out coil of the dot cut-in .and cut-out relay, an energizing relay having its coils included in the last-mentioned circuit and provided with circuitrontrolling contacts, a circuit controlled by the contacts of the energizing relay, a dash perforator circuit conr trolling relay having its coils included in the last-mentioned circuit and provided with circuit-controlling contacts, and a circuit controlled by the last-mentioned contacts and with which the dash perforating means is included.

7. 1n an automatic tape perforating receiver for telegraph systems, the combination of a perforator including space perforating means, a receiving relay responsive to incoming space current impulses, a circuit controlled thereby and including a space current responsive relay provided with circuit-controlling contacts, a circuit controlled by the said contacts, a relay having its coil included in the said circuit and provided with circuitcontrolling contacts, a space repeating relay having its coils connected in circuit with the contacts of the last-mentioned relay and provided with circuit-controlling contacts included in the same circuit with the coils of the third menmg relay having its coil's in the same cirname to this specification in the presence of cuit with the coils of the space repeating two subscribing Witnesses.

tioned relay, a space perforator circuit clos- In testimony whereof I have signed my relay and including circuit-controlling con- DUNCAN HENRY CAMERON. tacts, and a circuit including the space perlVitnesses:

forating means and the last mentioned con- B. L. HENNESSY,

tacts. ALFRED GUNN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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