US847656A - Telephone-relay. - Google Patents

Description

No. 847,656. PATENTED MAR. 19, 1907.

D. s. DIGKERT.

TELEPHONE RELAY.- APPLICATION FILED MAY 22, 1906.

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DILPERT s. DICKERT, or SALT LAKE CITY, UTAH.

TELEPHQNEQELAY.

Specification of Letters Patent.

-Patented March 19, 1907.

Application filed May 22,1906. Serial No. 318,152.

1'0 all whont it -may concern: 1

Be it known thatI, DILPERT S. DICKERT, a citizen of. the United States, and a resident of Salt Lake City, in thecountyof Salt Lake and State of Utah, have invented certain new and'useful Improvements in Telephone Relays, of which the following is a specification.

My invention relates .to relays for telephone-circuits; and it has for its object a telephonerelay which when inserted into the telephone-circuit will enable soundwaves to be transmitted much greater distances than is at relay.

For this purpose my invention conslsts, es-

present possible without a sentially, of-a telephone-relay comprising.

two sets of magnets, a diaphragm controlled by said magnets, and means in connection with ,said diaphragm to transmit and strengthen weak incoming vibrations.

The nature of my invention will best be understood in connection with the accompanying drawing, which is a diagrammatic -'view showing my relay connected in circuit betweentwo stations. g

Referring to the drawing, A and B indicate two telephone-stations, for example, sixteen himdred'iniles apart and each eight hundred miles from the transmitting-relay R, eight hundred miles being about the present limit of direct transmission.

represents the usual telephone-receiver, and 11 the transmitter.

12 is a local battery located either at the instrument or at a central station.

13 and 14 are the line-wires from station A, and 15 and 16 the line-wires from station B.

The relay-transmitter R comprises the two setsof receiving- magnets 17 and 18, one for each station, a common diaphragm 19, placed between said magnets, transmitters 20 and 2] and the induction- coils 22 and 23, and batteries 2e-and 25.

The line-wires 13-, 14, 15, and 16 terminate, I

respectively, in the primary coils ofthe induction- coils 22 and 23, whose secondary coils are in a closed circuit including, respec tively, the magnets 17 and 18. The relaybattery 24 is located in series in one of the liue-wires from station A and the relay-battery 25in one of the linewires from station B. The transmitting devices 20 and 21 are preferably of the carbon type with contactpoint operatediby the diaphragm 19. The transmitter 20 is connected by wire With line-wire 16, and the contact-rod 26, insulated from the diaphragm 19, is electrically connected by wire 31'with the line-wire 15.

The transmitter 21 is connected to the line wire 14'by wire 28, and the contact-rod 27 is electrically connected with the diaphragm itself, which is in connection with line-wire 13 through wire 29.

The operation and circuits of my improved relay-transmitter. are as follows: A weak telephonic impulse on the line 13 14 enters the relay and completes the circuit through the primary oi induction-coil 22. A current is thus set up in the secondary of this coil, thereby energizing'the magnets 17, which in turn move the diaphragm 19. The mpvement of the diaphragm .19 varies the resistance of the transmitter 20 through varying the degree 01" contact, and thereby varies the phonic impulses, but considerably strength- I ening them through the local battery 25. l A telephonic impulse coming iromthe station B operates similarly by energizing the magnets 18 and operating the transmitter 21, which sends a corresponding strengthened impulse to the line-wires 13 14 through local battery 24. p

In providing a common diaphragm between the two sets of magnets I avoid the obj ectionable eflect of repeating back into the sendingline, causing a consequent confusion of vibrations. flt might be supposed that the pulsations from one transmitter would affect the opposite primary and secondary, and thereby the corresponding magnets, and thus cause a repeating back into the sending-line. This dcesno't occur, however; as the primar coil becomes partly short-circuited by the' transmitter-circuit, thus weakening the magnets and releasing the diaphragm, and thereby contact resistance of the transmitter. Also since both contact-rods are. attached to a I common diaphragm, as the one is drawn toward its carbon block the other is drawn away, tending to increase the resistance of :05

the transmitter-circuit. The one transmitter in operating thus automatically increases the contact resistance of the other by means of the common controlling-diaphragm and the part short-circuiting of the opposite primary. 1 1 o "What I claim as new, and desire to secure by Letters Iatent of the United States, is.

1. In. a relay for telephor.c-liiies,- two magnetically-operated transmitting devices respectively shunted across the incoming and outgoing lines, and means to increase the contact resistance'of one of said transmitting devices when the other is in operation.

2. In a; relay for telephone-lines, two magnetically-operated transmitting devices re' spectively shunted across the incoming and outgoing lines, and means to automatically lncrease the contact resistance of one of said transmitting devices when the other is in operation.

3. In a relay for telephone-lines, two magnetically-operated transmitting devices respectively shunted. across the incoming and said transmitting devices when the other is outgoing lines, and a common diaphragm operatively connected therewith and adapted to lncrease the contact resistance of one of electromagnetic means included in closed circuits with the corresponding secondaries of said induction-coils; and a common diaphragm operated by said electromagnetic means and controlling said transmitting devices.

6. A relay adapted to be inserted in a telephone-line, and comprising two inductioncoils whose prim arics are respectively in series with the incoming and outgoing lines; two electromagnets, included in closed circuits with the corresponding secondaries of said induction-coils; a common diaphragm interposed between said electromagnets; and two transmitting devices controlled by said diaphragm and operated through said magnets.

7. A relay adapted to be inserted in a tele-' phone-line, and comprising two inductioncoils Whose primaries are respcetively in series with the incoming and outgoing lines; two electromagnets included in closed cir cuits with thecorresponding secondaries of said induction-coils; a common diaphragm interposed between said electromagnets; a transmitter-circuit shunted across said outgoing line; a]; transmitter-circuit shunted across said incomin "line; a source of elec tricity in series wit i' said outgoing line; a source of electricity in series with. said incoming line; a trai'ismitting device in said transmitter-circuit shunted across the outgoing line a trait smittin g device in said transmittercircuit shunted across said incoming line,

said transmitting devices being controlled by said diaphragm and operated through said electroinagiiets.

Signed at Salt Lake City, in theco'uiity of Salt Lake and State of Utah, this 3d day of May, A. D. 1906.

1.) l I ll ERT S; DICKER'I.

' litnesscs:

AiiiAL' l3. SiUVYER, J12; Eni'rii M. .llOLMAN.

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