US325500A - randolph - Google Patents

Description

(No Model.)

J'. B. OLEAVER.

ACOUSTIC TELEPHONE.

No. 825,500. Patented Sept. 1, 1885.

WITNESSES c9716 @WOM fli g/32 5p ew/2 PM, v Attorney UNITED STATES PATENT OFFICE.

JOSEPH BRADFORD CLEAVER, OF NEXV YORK, N. Y.

ACOUSTIC TELEPHONE.

SPECIFICATION Application filed April 28, 1885. (No model) To all whom it may concern.-

Be it known that I, JOSEPH BRADFORD CLEAVER, of the city, county, and State of New York, have invented a new and useful Improvement in Acoustic or Mechanical Telephones; and I hereby declare the following to be a full and clear description thereof.

This invention relates to the construction of the telephone with a series of trussing-wires over the front face of the diaphragm, and an anchoring-disk connected therewith by short connectingwires, the said anchoring-disk forming the anchorage proper for the linewire.

The invention will be readily understood by reference to the accompanying drawings, of which Figure 1 is a perspective view of one of the improved telephones, showing its line-wire and the improved resonance-resisting cushion. A portion of the side of the telephone-case is broken out in this view to show the wire and cushion arrangement. Fig. 2 is a front face view of the improved telephone. Fig. 3 is a sectional elevation taken on the line a; x of Fig. 2 through one of the anchoragefastenings of the diaphragm trussing-wires. Fig. at is a detail front elevation of the cushion plate or disk, to which the linewire is anchored through a cushion, and from which short anchorage-wires extend to the trussingwires of the diaphragm. Fig. '5 is an enlarged sectional detail of the receiving car-tube and its attachment-piece by which it is attached to the line-wire of the telephone.

The case A has a textile fabric diaphragm, B, secured over a circular aperture made in its front face-plate, a, as in acoustic telephones now in use. These textile diaphragms are of very thin material, and therefore do not fur nish sufficient strength for the anchorage of the line-wire, and to provide the requisite strength of anchorage the anchorage or trussing wires 0 are drawn tightly across and close to the front face of the diaphragm l3, and are turned down through the holes (K, in the front plate or diaphragm-frame, a, of the telephonecase, and secured at the back of the said faceplate a. The said. anchorage-holes a are made in pairs, say a quarter of an inch apart, more or less, and the trussing or anchorage wire is passed in through one hole of a pair and out through its mate, so that at each of these anchorages the trussing or anchorage wire C is securely attached to the said front face-plate, a. The trussingwires C are drawn tightly across the front face of the diaphragm between these anchorages a a, and the branching anchorage-wires D are attached by their front ends to these trussing-wires O, and by their rear or inner ends to a small metallic disk or cushion plate E, to which the linewire F is attached in the manner presently explained. This disk or cushion plate E has a central aperture through which the line-wire F passes, and concentrically around the said central aperture, and near the edge of the disk E and at equal distances apart, other apertures are made for the short branching or diverging anchorage-wires D.

A cushion, G, of india-rubber, leather, linoleum, or any equivalent or suitable material, is placed on the center of the disk E and on the side of the said disk next the diaphragm, and a central aperture through this cushionpiece permits the line-wire to extend through the said cushion-piece and be secured to the metallic anchorageplate f on the inside of the said cushion. The connecting-wires D and the attached disk E form a direct tensional connection from the diaphragm B to the next station, and the acoustic effects produced on or by a diaphragm so constructed and attached are of the highest order and of great utility, and by the use of the intervening cushion G all deleterious sounds-such as the zeolian effects of wind upon the line-wire or storms and other foreign sounds-are excluded from the telephone.

The receiving mechanism of this telephone consists of a bulb, H, of india-rubber or other suitable material, and an ear-tube, I, leading from the said bulb to the ear of the person receiving. The said bulb is placed on the line-wirei. 6., the line-wire F is passed through the said bulb from side to sideand the result of this device is a wonderfully clear delivery of the telephonic sounds through the tube I to the ear of the receiver.

Having described my invention, I claim 1. An anchorage for theline-wire of an acoustic telephone, consisting of a series of trussing i3 325,5CO

The disk E, the line-wire F, anchor-plate f, and the cushion G, combined with the anio ehorage-wires D, trussing-wires G, and diaphragm 13, substantially as described.

J. B. OLEAVER.

or anchorage wires drawn tightly across the l 2. front face of the diaphragm and connected by means of short parallel wires with a metallic disk of a smaller diameter tih an the diaphragm and placed behind and slightly removed from lhe diaphragm, the said snhdianietered 1netallic disk forming the anchorage proper for the line-wire.

\Vitnesses:

M. RANDOLPH, Eur; EN n H. L. RANDOLPH.

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