US728162A - Telephone. - Google Patents

Description

No. 728.162. PATENTED MAY 12, 1903.

W. L. DENIO.

TELEPHONE.

APPLICATION FILED PBB.B, 1903. N0 MODEL. 2 SHEETS-BEEF]! 1'.

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No. 728,162- PATENTED MAY 12. 1903.. v

W. L. DBNIO. TELEPHONE.

AP'PLIOATION FILED P33. 6. 1903.

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Patented May 12 1903:.

PATENT OFFICE.

WILLIALWI L. DENIO, OF ROCHESTER, NEW YORK, ASSIGNOR OF ONE-HALF TO HOBART F. ATKINSON, OF ROCHESTER, NEW YORK.

TELEPHONE.

SPECIFICATION forming part of Letters iatent No. 728,162, dated May 12, 1903. Application filed February 6, 1 903. (Serial No. 142,115. (No modelJ' To all whom it rncty concern..- 1

Be it known that 1, WILLIAM L. DENIO, a citizen of the United States, residing at Rochester, in the State of New York, have invented an Improvement in Telephones, of whichthe following is a specification, reference being had to the accompanying drawings. 7 7

My invention relates to an improvement in telephones, the object of which is to increase the sensibility and power of the instrument.

My improvements are fully described and illustrated in the following specification and the accompanying drawings, the novel features thereof being'specified in the claims annexed to the said specification.

In the accompanying drawings, Figure 1 is a section of a telephone-receiver. Fig. 2 is a plan view of the washer or gasket. Fig. 3 is a side view of the washer or gasket. Figs. 4, 5, and 6 represent modifications.

In Fig. 1, A is the case of an ordinary telephonic receiver. The threaded cap B screws onto the end of the case A, holding" the diaphragm 0 around the edge of its periphery between the corrugated washer or gasket D' and the cap B. E is a magnet, attached to the ends of which are the coils F, which cause the diaphragm to vibrate when the instru-' ment is in operation. v,

Between the receiver-case A and the diaphragm O is placed the washer D, which is preferably made of sheet metal bent or corrugated, as shown in Figs. 2 and 3. The result of the corrugations is to hold the diaphragm firmly, so that it cannot rattle, but at the same time to allow the diaphragm to vibrate much more freely than it'wouldif held rigidly, as in the ordinary receiver, thereby much increasing the sensitiveness of theinstrument and the strength of the sound emitted by it. In the ordinary telephone the diaphragm is held tightly between the case and the cap, which restricts its vibration, or if the diaphragm is not held tightly it rattles; but where my-invention is employed the diaphragm is held firmly, preventing it from rattling, but at the same time leaving it so it can vibrate freely, thereby making a very sensitive instrument and preventing the metallic tone frequently observed. The threaded cap B provides an easy means of adjusting the tepsion of the diaphragm so as to obtain the best results.

My improvement may be applied to telephones, phonographs, or any acoustic instru- 5 5 ment having a vibrating diaphragm. I have observed that the clearest tones and the greatestvolume of sound are secured when the [diaphragm is resiliently supported at an even :number of points around its periphery.

The corrugated washer may be made of any suitable metal or alloy-vsuch as aluminium, brass, iron, Or-steel-although I prefer to employthe same material as in the diaphragm. I have also used washers of celluloid, hard rubber, paper, and fiber. As indicated in the drawings, the washer is placed on the same side of the diaphragm as the magnet, and I prefer to use it in such location; but it may be placed on the other side, or two wash- 7o ers may be used, one on each side of the diaphragm. I have also employed a concaved washer, such as indicated in Figs. 4 and 5, which may be divided or cut away to form independent bearing-points, as represented in Fig. 6.

' r 1. In a telephone or other acoustic instrumenthaving a vibrating diaphragm, the combination with the diaphragm of the corru- 8o gated washer the magnet and the supportingcase, substantially as described.

2. In a telephone or other acoustic instrument having a vibrating diaphragm, the combination with the diaphragm of the corrugated washer and the cap provided with means foradjusting the tension of the diaphragm, substantially as described.

3. In a telephone or other acoustic instrument having-a vibrating diaphragm, the combination with a frame or case, of the diaphragm, the corrugated washer and the cap, substantially as described.

WILLIAM L. D'ENIO.

Witnesses:

GEORGE A. GILLETTE,

H. R. SELDEN.

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