US293161A - Telephone apparatus - Google Patents

Description

2 Sheets-.-Sheet 1.

E. T. GILLILAND. TELEPHONE APPARATUS.

(No Model.)

Patented Feb. 5, 1884.

WITNESSES.

INVENTOR.

'(No Model.) l 2 Sheets-Sheet 2,

; E. T. GIL LILAN D. TELEPHONE "APPARATUS;

No. 293.161. w Patented Feb, '5, 1884.

WI TWESSE-S'. i 7E T 0R1 I PER I I f 7W W I A! nan UNI E T E ArnNr @rrrcn.

. EZRA T. GILLILAND, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE WESTERN ELECTRIC COMPANY, OF CHICAGO, ILLINOIS.

APPARATUS.

SPECIFICATION forming part of Letters Patent No. 293,161, dated February 5,; 1884. I Application filed May 2, 1882. (No model.) V

To all 2071 0172, it may concern..-

Be it known thatI, EZRA T. GILLILAND, of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Telephone Apparatus, of which the following is a specification.

The principal object of my said invention is to mount atelephone in such a manner that it "may be caused to make or shunt the eleetrical circuit by simply pressing against it, and to break or shunt said circuit automatically when the pressure is relieved. A further object is to provide a substitute for the ordinary flexible cord commonly used with telephones. The first object is accomplished by mounting the telephone ou-a pivoted arm,

spring to said arm or said projection in such' manner as to at all times maintain a contact with one of said points when not forced toward the other. The second objectis accomplished by running insulated wires along said arm, and terminating the same in a sliding or.

ient and desirable construction than one wh erein'the arm shouldbe all in one piece, as will be understood by the following description.

' I desire, however, to distinctly disclaim any arrangement wherein the gravity of thetelephone or similar force causes the disconnec' tion.

The method of making electrical connection through insulated wire attached to the arm, instead of by a flexible cord,will be read-- ily understood from the drawings and the description hereinafter-given. e

Referring to "the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a perspective view of a box containing the call-signal apparatus for a telephone, and provided with my invention; Fig.

2, a horizontal sectional view, looking downwardly from the dotted line 5 a; Fig. 3, a vertical sectional view, looking toward the rear of the box from the dotted line g] y,- Fig. 4, a sec tional view, looking toward the left from the dotted lines as :0,- Fig. 5, aside elevation of so oted to said bearingplate D, a spring attached thereto; E, a telephone-arm attached to said device- F a s )rin -washer inter osed between said device and said arm; G, the telephone; I-I,

a connection between one of the binding-posts of the telephone and an insulated screw or pin passing through the arm E; I, a connection between the other binding-post of the telephone and a similar screw or pin, also passing through said arm; J K, said screws or pins M 0", springs against which said screws rest; L, the main or line wire of the telephone; M,

the switch-wire running to thetelephone; N,

the switch-wire running to the call-signal apparatus; O, the telephone ground-wire; I,

the call-signal apparatus ground-wire; Q It,

the transmitter-batterywires, and S the trans mitter-battery. The box A is the ordinary box containing a magneto-generatorand othercall-signal apparatus, of any usual or approved form, which is or may be used in connection with a telephone, themagneto being "the form of apparatus with which I prefer to use my invention, although it is applicable to others.

The bearing-plate B is secured rigidly to the box A, and has two arms, I) b, to contain the pivots b b, on which the device 0 is pivoted. These pivots are preferably in the form of pointed screws, as shown, so that the bearings may be readily and accurately adjusted. pivots should be secured, when adjusted, by set-screws or set-nuts, the former being shown.

Said

The device consists of a plate forming the head of the T, which should correspond nearly in size with the face of the rear portion of the telephone-arm, and an arm projecting through the arrow-head-shaped part away from the device O in some suitable manner,

simple and convenient means of making this contact-springs M Q R, and preferably against the contact-springN, except when forced in the other direction. It is also a desirable means of connecting the main line L with the device 0. The telephone-arm E is secured to the device 0 by the screw 0, or in some other similar manner. It should be screwed tightly enough against said device to cause it to re main in the position in which it is placed until the position is forcibly changed. It carries the telephone, in the manner illustrated, securely and in convenient position. The spring-washer F is used for the purpose of aiding in holding the telephone-arm in place. The telephone G is the ordinary hand-telephone in common use. Any other receiving telephone is, however, equally capable of use with my invention. It is usually secured to the arm E by the clamp-plate E and screws c c. The connection H is preferably a piece of wire so covered as to be insulated from anything with which it may come in contact between its two points of connection, which connects the binding-post g'of the telephone with a screw, J ,or other similar or equivalent device. The connection I is a piece of wire similar to the wire H, and connects the bind- .ing-post g of the telephone to the screw K.

The screw J passes through the rear end of the arm E and against thespring M It is electrically separated from the arm by the piece of insulating material J. The wire H is preferably clamped between a nut, j, on this screw and a washer thereon. M is secured to the outside of the box A, and extends down under the spring J, as shown. It will yield sufficiently to permit the arm to be pressed inwardly and allow it to move outwardly during the ordinary use of this device, and is .wide enough so that the point of the screw J will remain in contact'therewith, notwithstanding any ordinary movement of the arm on its pivot. This spring is usually connected to the telephone-wire M. The screw K and spring 0 are similarly con structed, and perform substantially the same functions as the screw J and spring M". The spring 0 is preferably connected to the groundwire 0. The main wire L is connected to the A very connection is through the spring D.

The spring when the apparatus is in its normal position, with the arrowhead-shaped part resting against the contact-spring N, the current passes through the call-signal apparatus and to the ground, leaving the telephone entirely out out. XVhen, however, the switch is turned, with the arrow -head shaped part resting against the contact-spring M, the current passes through the telephone, and the latter is in condition for use. The wire M is the wire by which the telephone is connectedto the line. In the arrangement shown (most plainly in Fig. 2) the connection H, spring M wire M, (see Fig; 4,) and contact-spring M are each, electrically considered, a part of this wire or line, said contactspring being the termination when the apparatus is in normal position. cut-out wire, by which the telephone is cut out from the main circuit and the call-signal apparatus thrown in. It terminates in the contact-spring N, to which it is connected by a binding-screw or otherwise. It is usuallyso arranged in telephone apparatus as to turn the circuit from the telephone to the call-signal apparatus when brought in contact with the switch. The wires 0 and P run from the telephone and call-signal apparatus, respect ively, to the ground. The wires Q and R and the contact-springs Q It, in which they terminate, constitute means whereby this invention operates to connect the transmitter-battery circuit. at the same time the telephone is put in use, and correspond closely to similar wires or strips used in apparatus wherein the gravityswitch is employed.

Instead of the arrangement heretofore described, that illustrated by Fig. 7 may be used, whereby instead of cutting out the instruments they are simply shunted or short-circuited. Another modification of this device would be substantially reversing the course of the current, as shown in said Fig. 7'i. e., usingwhat is therein shown. as the ground-wire for the line-wire, and what is shown as the line-wire for the ground-wire. In this latter arrangement a modification in the mechanical part of the invention could also be accomplished. In stead of running the connection Htothe screw J, it could in this last-described case be connected to the body of the arm E, thus making said arm and the deviceOserve as the greater portion of one side of the telephone-circuit.

The operation of my invention is as follows: The apparatus being in the position shown, the spring D holds the device 0 away from the contact-spring M, thus keeping the tele phone G cut out or sh'ort-circuited, which is or should be the normal condition of the telephone in properlyconstructed apparatus, except when in use. It also in this condition keeps the transmittenbattery circuit open. WVhen it is desired to use the telephone, the user simply presses his ear against the mouth thereof, and the pressure, being communicated to the device 0 through the arm E, overcomes Referring now to Fig. 6, it will be seen that the force of thespring D and causes the arrow- The wire N is a short-circuiting or (No Model.) 2 Sheets-Sheet 1.

- E. T. GILLILAND.

TELEPHONE-APPARATUS. V v N0.Z93,162. Patented Feb. 5,1884.

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