US962800A - Telephone system. - Google Patents

Description

J. B. TAYLOR.

TELEPHONE SYSTEM. APPLIUATION FILED lfAY 3,1909.

962,800. 7 {Patented June 28,1910.

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JOHN B. TAYLOR, 0F SCHENECTADY, NEW YORK,

COMPANY, A CORPORATION OF NEW YORK.

TELEPHQNE SYSTEM.

Specification of Letters Patent. 1 I Application' filed May a, 1909. Serial No. 403,5;1.

Patented June 28, 19 10.

To all whom it may comm! Be it known that. I JOHN B. citizen of the United 1 TAYLOR, a States, residing at Schenectady, county of Schenectady, and

State of New York, have invented-certain new and useful Improvements in Telephone Systems, of which the following is a specification.

My invention relates to telephone systems, and has for its object an'improvement in the operation of such systems.

At the present time electrical energy is frequently transmitted for lon distances by means of conductors operate at a high voltage and carried on suitable poles for towers. In many instances .these transmission lines are adjacent to telephone circuits,

and it has been foundthat frequently they induce upon such circuitsf'a hlgh voltage 'WlllCl'l may subject p'ersonsusing the tele-.

phone apparatus to shockswhioh are not only annoying, but at times dangerous. In order to avoid these high-voltage shocks, it

has been the custom to employ upon such repeatln'gtelephone circuits high-v0 tage coils, or telephone transformers which have two windings insulated from each other, one windin being connected to the telephone circuit and the other tothe instruments. With such an arrangement those using the instruments will be protected from any high voltage which may be induced upon the telephone circuit, as the secondary wlnding of these transformers will be at a diiferent potential from that of the telephone circuit. When a considerable numer of such repeating coils or telephone transformers are used, however, difficulty is at times'experienced in properly ringingthe telephone bells or signal ap aratus employed to give notice that it is desired to send a telephonic communication. This difliculty arises from the fact that the magnetos or tele hone generators, which .may be used,

wh e of suflicient capacity to operate some bells and ransformers may not be of capacity to provide a current sufiicient for.

ma a number of such-transformers an' alsofor ringing the 'be1ls,-that is to say. that when many 9i 'fll' g'fi n l lfi i are used too great a load may be put'upon the line for the capacity of the telephone generators, and considerable annoyance experienced through the improper rmging of such bells.

The object of m invention than is to assrenon 'ro GENERAL amour-c providean improve method of operating a telephone systemwhich may be subjected to a high voltage and emp 0y repeatlng' coils or transformers, and st obtain a satisfac y used this object by permanently connecting the bells across the telephone circuitandproviding connections such that the repeatinog coils or transformers are normally cut out circuit,-but are connected to the c'ireuitiu any particular station which desires to send or receive messages. I A

For a further understanding vention reference may: be ha companying drawing, where Figure 1 shows the connections oommonl used for a telephone system operated wit repeating coils or transformers and Fig. 2 shows the connections for a. tele hone system operated in accordance wit" my new invention.

dperation of the bells or other devices of my .in

Referring first to Fig. 1, 1 and 2 are the .to the acr signaling purposes. I accomplish be used for the receiving and transmitting of messages. Conductors 1 and 2 may be adjacent t'o-a high-voltage electric circuit, but such circuit has not been shown in the drawing. 3 is separate windings insulated from each'other in a suitable manner. One of. these windings is connected to the telephone circuit by conductors 1', 2 and the other Windin' 1s transformer having two connected to conductors 5 and 16. A bel or signal apparatus 4 is shown connected to for ex'anipl e, to sendainessege from the 'conductors= 5 and 6. Conductors -5 and 6- number of 'such transformers are used, and.

frequently due to this fact be pro rly operated.

In I have shown connections for a telephone system in accordance with my invention,-1- and 2 representing the conductors of the circuit. Three Stations, A, B ancLCf, are shown, and transformers ti are shown for each station. Instead of these transformers the circuit, they switches 7 through conductors 1, 2 to the circuit. Bell 4 is shown as connected permanently across the circuit by connecting it the bells-cannot (the bell) to conductors 1, 2.- Conductors beover 5 and 6 are connected to the receiving and transmitt' instruments at the station in a manner similar to that described for Fig. l, but bell 4 is not directly connected to the circuit containing the receiving and transmitting instruments, as shown by thedrawing. The 0 eration of such a system will then be as fo ows: Normally switches 7 will be open. If it is desired to send a message from any station, such as A, for cxamp e, the sender closes'his switch 7 and sends a bell ringing signal byhis magneto or telephone generator in the usual manner. This will cause the bells in the various stations to ringin the usual manner, as they are connected across the circuit. The. magneto or tele hone generator, however, will not oaded, as in Fig. 1, with more than its normal load when such a signal is sent, because the transformers 3 are not normally in circuit in the various telephone stations, and, therefore, the magnetos or telephone generators do not have to energize these transformers. When a signal is sent a person in any station, such as 0, may close his switch 7 and thus connect his receiving and transmitting apparatus '.-to the telephone circuit, after which messages may be sent and received in the usual way between these sta tions. a

While I have shown all the stations as gnetos. f my new method: of opcrating such a System are that, as explamed above, the magnetos or telephone generators are not requirgd to ca an extraordina load, and, therefore, w' gperate the the switch being connected directly to are connected by means of ment and connections for thethe other or signa evices in a satisfacto manner. A fu i't h i' advantage is that than ting coils or transformers are out out o cu1t normall handle the receiving or a ratus, it may be done with perfect 8:: ety. The bell, which is that portion of the telephone apparatus requirmg the least attention, may be pl in any desired locality and suitably insulated for nus, however,

may, if desired, be automatically operated when the receiver is taken ofl the hook, so that the operation of the relay to the line would not require any additional operations to those at the present time.

While I have shown a certain arrangeout of my invention, I do not limit mysc to this am: ement or connection, but seek in the appen ed claimsto cover all such arrangements and connections as will be obvious to those-skilled in the art, and will be within the' scope of my invention. 'WhatIclaiz'nasnew and desire to secure by Letters Patent is:

1. The combination in a telephone system of receiving and apparatus, a transmission circuit, a switch, a transformer having one winding connected to the receiving and transmitting ap aratus and a second winding connected thronghthe switch to the transmission circuit, and a bell conswitc p 2. The combination in a telephone system of receiving and transmittingapparatus, a transmission-circuit, a two-pole switch, a highly insulated trans ormer having one winding connected to the receiving and transmitting a aratus and the terminals of win 1ng connected throu h the switch to the transmission circuit, 8.115 a bell connected across the circuit between the circuit and the switch. 3. The combination in a telephone system of a-transformer, a transmission circult, receiving and transmittin apparatus connected to 'said circuit ough, and protected by, the transformer, means for connecting the transformer to and disconnecting it from the circuit, and a bell permanently connected across the circuit.

4. The combination in a telephone system of a transformer having two windings, re-

vnecteilL across the circuit between it and the ce1v1ng and transmitting apparatus con- ,nected to one winding-a.

transmlssion circult, means for to and disco an a bell circuit.

nnecting it m the circuit, permanently connected across the cir-v and hence, ifit is desired to connecting the other wind 5. The combination in a telephone system the circuit, and a bell permanently connected of a transformer having two separate Windings insulated from each other by a, highvoltage insulation, receiving and transmitting apparatus connected to one of the transformer windings, a transmission circuit, a two-pole switch connecting the other transformer Winding to and disconnecting it from across the circuit.

In Witness whereof, I have hereunto set my hand this 1st day of May, 1909.

JOHN B. TAYLOR. Witnesses: BENJAMIN B. HULL, HELEN OHFORD.

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