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Publication numberUS979986 A
Publication typeGrant
Publication dateDec 27, 1910
Filing dateMay 19, 1909
Priority dateMay 19, 1909
Publication numberUS 979986 A, US 979986A, US-A-979986, US979986 A, US979986A
InventorsHoward Morgan
Original AssigneeHoward Morgan
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Telephone relay or repeater.
US 979986 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




Specification of Letters Patent.

.i pplication filed Hay 19, 1909. Serial No. 496,914.

To alter/wm it may concern:

Be it known that I, l-lowixnn MonGAN. a citizen of the United States, residing at Quinter, in the county of Gore and State of Kansas, have invented new and useful I mprovements in Telephone Relays or Repeaters. of which the following is a specification.

r1`his invention vrelates toa `telephone relay or repeater adapted tor-use between two lines or circuits or between portions of a grounded or metallic circ-uit for transmit-- ting vocal or bell ringing impulses from one t'o the other without a direct connection between them.

The object of the invention is to provide a simple, effective and inexpensive, construetion of device of this character through whicl'i'impulses may be equally well sent in bothdirections, which may'be used for the above stated and other purposes, such as Jfor temporarily connecting independent lilies, which will intensify the current impulses to enable lnessages to be sent long distances or over lines having weak current supply. and which is adapted for directl use without a local battery.

The invention consists of the features of collstruction, combination and arrangement ot parts hereinafter fully described and claimed. reference being had to the accompanying drawing showing a sectional elevation of my improved relay as arranged for use.

.lteferring to the drawing. the relay or repeater'con'iprises a frame or inelosing casingv l having removable end heads "2 which are preferably flanged to overlap the ends of the casing and are secured in position by adjustiug screws B.'

rrangcd within the casing are two sets ot' electromagnets 4 and o disposed iu opposed relation, and with their pole faces (l in contact or slightly spacedapart. Each set,

which is fixed to the covers 2, bear against insulated base pieces T, secured by screws S to the covers, and to which said magnets'are suitably fastened.

(`)n one of the covers 2 are mounted binding postsI 9 and 9^, and ou thc other cover 2 are mounted similar binding posts l0 and 10". rl`o the lirst named binding posts are attached the transmitting'and Iround or return wires ll and 1l. respectively. of one circuit or telephone liuc, or av portionof a telephone circuit or line. while connected with the other binding posts 10 aml 10are the transmitting and ground or return wires l2 and 12a. respectively, of another telephone circuit or portion of the same circuit.y which sets of wires are respectively coupled through their sets of binding posts with the windings of therespeetive sets of electrolnagnets 4 and Tu the use of the relay or repeater', such instrument is arranged `between two telephone lines or circuits or portions of the same line or circuit, wherever it is desired t-o overcome weakness of current strength in the line or to transmit messages between sepa 'ate circuits without. directly connect-ing the wiresl thereof. .\rranged in operative position asdeseribed, the device is designed and operates to transmit from one line or circuit to the other line or circuit or portions of the lsame line or circuit the vocal and ringing impulses transmitted from any telephone instrument in the line and to transmit the, same with increased intensit along the line or from one circuit or branc 1 of a circuit to another, whereby disadvantages attendant upon w x'ak current strenfth in' any circuitor directly connecting two independent circuits are effectually avoided.

A\ssuming that ringing or vocal impulses' are' being transmitted from aninstrument through the conductor 1l, it will be understood that the current of the line will pass therefrom through the binding post 9 to and through the electromagnets 4, and thence through the binding post- 9 through the con'- ductor l1 to the ground or source. By this means the electromagnets t will be energized and will in turn influence aml set up an iudueed current in the coils of the magnets 5, whereby the impulses will be transmitted through the conductor l2. Assuming on the other hand that vocal or ringing impulses are being transmitted through the conductor l? from a telephone instrument connected therewith. it will be apparent that the eur rent will pass through the binding post 10 to the magnets 5. and thence to the ground or back to the .sourcethrough the binding post l0 and conductor l2. As a result, the magnets a will be energized and set up an induced current in the magnets 4, transmitting the vocal or ringing impulses. to and through the conductor ll.

lt will thusI be seen that my invention provides a simple and inexpensive construction of relay which wili operate to transmit current impulses in either direction, and may be Patented Dec. 27, 1910.

directly coupled to the conductors ot separate lines or portions of the same line for direct transmission and without the necessity of employing an auxiliary or local battery circuit. My invention thus overcomes objections to prior devices of its kind, and is of value in enabling both bell signal iinpulses and vocal impulses to be directly transmitted, whereby simplicity of construetion is secured and the system rendered less liable of getting out ot order.


The combination with the transmitting -andground or return wires of adjacent circuits or sectionsof a circuit, of a supporting frame provided with sets of binding posts to which the wires of the respective circuits or sections ot a circuit are connected, a set of magnets carried by said traine and connected with one of said sets of binding posts, and a second set ot magnets carried by the frame and connected with the other set of binding posts, said sets ot magnets having their pole faces arranged in juxtaposition, whereupon upon the energization of either set of niagnets corresponding induced currents will be setl up in the other set of magnets, substantially as described.

In testimony whereof l aflx my signature vin presence ot two witnesses.

HOWARD MORGAN. Witnesses Guo. 1. (Inneren, lV. l". VAN Serco

Referenced by
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US5422619 *Aug 25, 1994Jun 6, 1995Murata Manufacturing Co., Ltd.Common mode choke coil
Cooperative ClassificationH01F38/12