US1118340A - Transmitter-bracket. - Google Patents

Description

A. F. F. GILSON. TRANSMITTER BRACKET. APPLICATION TILED DBO.15, 1911 Patented Nov. 24, 1914.

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ALBERT F. F. GILSON, 0F CLUSTER, NEW JERSEY, ASSIGNOR TO WESTERN ELECTRIC COMPANY, OF NEW YORK, N. Y., A CORPORATION. OF ILLINOIS.

TRANSMITTER-BRACKET.

Application filed December 15, 1911.

To a whom it may} concern Be it knownthat I, ALBERT F. F. GILSON, citizen of the United States, residing at Closter, in the county of Bergen and State of New Jersey, have invented a certain new and useful Improvement in Transmitter- Brackets, of which the following is a full, clear, concise, andexact description.

This invention relates to pivotally supported telephone transmitters, and the object of this invention is to provide improved and more durable means for retaining the lug forming part of the transmitter, in connection with the sheet metal bracket, which is attached to a stationary support, like the box of the subscriber set. It is an improvement upon the apparatus described and claimed in Letters Patent No. 905,907, December 8, 1908, to McLarn.

For the purpose of retaining the recessed lug forming part of thetransmitter in the sheet metal bracket a sheet metal side arm is provided; this has a projection at one terminal in position to pass through an opening in the wing or side wall of the bracket and enter a recess in the transmitter lug. This side arm is held inposition by a screw extending through both side walls of the bracket and through a tubular spacer. The spacer prevents the application of undue pressure tothe transmitter lug by the side arm when the screw is in position.

The two wings of the sheet metal bracket are shaped, as shown, to provide a long, flat contact of extended area between the interior surface of one wing of the bracket and the transmitter lug; and a long, narrow bearing covering a more limited area be tween the interior surface of the other wing of the bracket and the transmitter lug. The result is the provision of the necessary clamping pressure ator near thepivotal center of the transmitter lug, and also of friction across the pivotal point of said lug. The thin spacer between the transmitter lug and the wing having the contact portion of limited area allows said wing to be drawn by the spacer screw toward the transmitter lug at or near the latters pivotal center and in the direction of its pivotal axis.

The improvements will be more readily understood by reference to the accompanying drawings, in which- Figure 1 is a side elevation showing a transmitter mounted upon the bracket, the

Specification of Letters Patent.

Patented Nov. 21,1914.

Serial No. 665,909.

escutcheon plate which supports the bracket being in section; Fig. 2 is a view of the brackettaken on section line 22 of Fig. 1; Fig 3 1s a perspective view of the bracket detached, the spacer, the sidearm and the screw being removed and located adjacent to the positions which they occupy when assembled; and Fig. 1 is a rear elevation of the bracket.

The transmitter case 10 is of usual construction, being provided with the rearwardly projectlng recessed arm or lug 12. The stationary support 13, which may be the front of the box, is cut away, as shown, and the bracket 11 is secured to the escutcheon plate 15 by means of screws 16. This escutcheon plate and the bracket are preferably stamped out of sheet metal. The bracket 1 1 is bent to form side walls or wings to approximately parallel, with a perforated section 8 uniting said walls or wings w; the perforation is shown in Fig. 1 at 72. One wall or wing 10 is perforated at 20 and provided with a depressed interior contact surface 50 engaging substantially the whole side area of the lug 12; the other wall or wing to is provided with a sectional depression (shown in Figs. 2 and 3) the contact surface of this depression (50 is limited to approximately one-half of the side area of the lug 12 and extends from one edge of the perforation 21 in the lug 12 to a point on the opposite side of said perforation, so that perforation 21 is bridged by this depressed contact area 60. The two surfaces 50 and 60 thus supply the necessary frictional contact surfaces to maintain the lug at any desired angular position. The depression of the long narrow area 60 provides a thin space 61 between the edge of said depressed area and the point of engagement of the screw 22 with the threaded aperture on the wing w. This permits the screw 22, when turned, to draw the wing to into closer proximity or engagement with the lug 12, the extent of the movement of the wing being limited by the spacer 30, and the frictional engagement around the center of rotary movement being thus varied. There is a side plate or arm a of sheet metal bent into the form shown in Fig. 3, and a projection as is made part thereof and located in position to extend through the perforation 20 in wing w into the recess 21, Fig. 2, in the transmitter lug 12. The side plate 1 or arm a is placed against the exterior of wing w and retained in position by screw 22. A spacer 30 is provided to prevent pressing wings to and side plate or arm a into too close relation with lug 12. The spacer 30 is located between wings w and its ends abut against the interior of the opposite wings w, this provides a limit to the extent to which the wings to may be brought toward each other by the screw 22; this screw 22 has its end threaded to take in said screw threads in the aperture 34:; the wall of aperture is struck up to provide an extended screw-threaded surface. The spacer prevents the threads on screw 22 from stripping when said screw 22 is tightened.

WVhen the parts are assembled as described the transmitter may be turned to and caused to rest in any desired angular position within the range of its movement. To remove the transmitter the screw 22 is withdrawn a sufiicient distance to permit the projection a; on the side arm a to be withdrawn from the recess 21 in the transmitter lug 12. The side arm a and its projection a: provides a positive center for the transmitter lug, no pressure being brought against the transmitter lug by the employment of such side arm. A ground screw or terminal connection 40 is provided to which may be connected a grounded terminal.

What I claim is 1. The combination of a telephone transmitter, a recessed lug forming part thereof, and a sheet metal bracket having parallel wings, with means for retaining the lug in an adjustable position in the bracket, consisting of a screw, a tubular spacer, a side arm or plate, and a projection carried thereby in position to extend through an opening in one wing of the bracket into the recess in the lug forming part of the transmitter.

2. The combination of a telephone transmitter, a recessed lug forming part thereof,

a sheet metal bracket having parallel wings,

for retaining said plate in position against one wall of the bracket.

3. The combination of a telephone transmitter, a recessed lug forming part thereof, a bracket having parallel wings between which said lug extends, a removable plate having a projection thereon in position to extend through an opening in one wing of said bracket into the recess in said transmitter lug, and means for retaining said plate in position and for drawing said wings into frictional engagement with said transmitter lug.

4. The combination of a telephone transmitter, a recessed lug forming part thereof, a bracket having parallel wings between which said lug extends, one of said wings being arranged to engage substantially the whole side area of said lug and the other wing only approximately one-half of the side area of said lug, a removable plate having a projection thereon in position to ex tend through an opening in one wing of said bracket into the recess in said transmitter lug, and means for retaining said plate in position and for drawing said wings into frictional engagement with said transmitter lug.

In witness whereof, I hereunto subscribe my name this 11th day of Dec. A. D. 1911.

ALBERT F. F. GILSON.

W'itnesses:

IRVING MACDONALD, W. F. HOFFMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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