US526888A

US526888A - Transmitter for telephones

Info

Publication number: US526888A
Authority: US
Publication date: 1894-10-02
Anticipated expiration: 1911-10-02

Description

(No Model.)

M'. 0. ANTHONY. TRANSMITTER POR'TELEPHONES.

No. 526.888. Patehted Oct. 2, 1894.-

Y, M a M QM I 7 i I @311 afloat mu NITED STATES PATENT OFFICE.

MARK Oy-ANTHONY, OF CINCINNATI, OHIO.

TRANSMITTER FOR TELEPHONES.

SPECIFICATION forming part of Letters Patent No. 526,888, dated October 2, 1894.

To aZZ whom it may concern.-

Be it known that 1, MARK O. ANTHONY, a citizen of the United States of America, re siding at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Transmit-- mitting instruments of this class now in use,

is the rattling, or jarring or vibratory noise incident to their use. I find that this vibratory noise is largely due to the freedom of the pencils to rotate in their bearings.

The objects of my invention are to provide transmitting mechanism which dispenses with the rattling, jarring or vibratory noise incident to the transmitters now in use, and to arrange the maximum number of carbon contacts in a given space, and the invention consists in the parts and combination and arrangement of parts hereinafter described and claimed.

In the drawings: Figure 1 is a front viewof one form of my improved transmitter, and Fig. 2 a like view of a modified form.

A represents the supporting plate or diaphragm; b, c, d, and e, carbon blocks secured thereto; f, g, h and v a series of carbon pencils, mounted in the blocks; j, (Fig. 1,) a carbon pencil having its bearings in pencils, f and i; j, a carbon pencil having its bearings in pencils 9 and h, and lo a carbon pencil having its bearings in the transverse pencils j and 9".

Application filed July 28,1894. SerialNo. 518,829. (No model.)

It will be seen that pencils f and c' and g and h, are locked against rotation by the transverse pencils j and j which are in turn lockedagainst rotation by pencil is.

In the form shown in Fig. 2, a pencil, Z, connects two oppositely mounted pencils, g and i, of the series and the other pencils of the series are connected with the transverse pencil Z by means of pencils,m and m. This method of mounting permits the use of cylindrical bearings, thus giving alarger area of contact and yet locks substantially all of the pencils against rotation.

I claim as my invention- 1. The combination, in a telephone transmitter,with a supporting plate or diaphragm, of a series of carbon blocks projecting from the supporting plate; a series of carbon pencils extending from block to block; and a transverse pencil or pencils connecting one or more "pairs of pencils in the series and locking them against rotation, substantially as and for the purpose specified.

2. The combination in a telephone transmitter, with asupporting plate or diaphragm, of a series of carbon blocks projecting from the supporting plate; a series of carbon pencils extending from block to' block; a pencil extending from one of the series of an oppositely mounted pencil and adapted to hold them against rotation, and a pencil or pencils connecting other members of the series with the transverse pencil and adapted to hold them against rotation, substantially as and for the purpose specified.

M. O. ANTHONY. Witnesses:

ARTHUR E. GEORGI, BENJAMIN BLOOH.