US569018A - Telephone - Google Patents

Description

(No Model.)

A.v GARTNER. TELEPHONE.

No. 669,618. Patented oct. 6, 1696.

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UNITED STATES PATENT OFFICE.

ALFRED GARTNER, OF NEWARK, NEV JERSEY, ASSIGNOR TO ROBERT BAKER AND JOHN FILMER, OF BROOKLYN, AND EDGAR L. RYDER,

OF SING SING, NEW YORK.

-TELEPHONE.

SPECIFICATION forming' part 0f Letters Patent N0. 569,018, dated October 6,v 1896. Application filed February 15, 1896. Serial No. 579,411, (No model.)

To @ZZ whom t may concer/1,:

Be it known that I, ALFRED GAETNER, a citizen of the United States, residing in Newark, Essex county, and State of New Jersey, have invented certain new and useful Improvements in Telephones; and I do hereby 'declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to` make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specilication.

The object of my invention is to provide a telephone-receiver in which the bearing-sur-y faces for the diaphragm are greatly reduced, the latter can vibrate more freely, and the transmitted sounds or words can thus be heard very clear and distinct.

The invention consists in the improved telephone-receiver, the bearing-surfaces for the diaphragm, and in the combination and arrangement of the various parts thereof, substantially as will be hereinafter more fully described and claimed. p

In the accompanying drawings, in which like letters of reference indicate corresponding parts in the two figures, Figure 1 is aside elevation of aA telephone-receiver provided with my improvement with certain portions shown in section; and Fig. 2 a top plan view of Fig. l, the top piece and the diaphragm being removed.

The telephone-receiver A is made in two sections ct and b, secured together by a screw thread connection c in the usual manner. The section ct is provided at its upper portion with an annular groove or channel e, in which are arranged a series of balls f of a size so as to fit snugly into and yet to project over the crest or top fi of the inner wall of the said channel e.

The section b, penetrated by the central opening cZ,-is provided on its inner portion with an annular curved flange h, which is of a diameter substantially equal to the diameter of the channel e. The diaphragm gis arranged between the sections a and b and is held in position by the said balls f and the curved annular ange h, respectively. By this arrangement the bearing-surfaces for the diaphragm are considerably reduced, and the latter is thus allowed a greater and easier vibration, whereby the sounds or words transmitted can be heard more distinctly than in other phones.

I do not intend to limit myself to the preoise construction shown and described, as various alterations can bemade without changing the scope of my invention; but

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination with the telephone-receiver and its diaphragm, of a series of balls arranged in the receiver and forming an annular bearing for one side of the diaphragm, and an annular curved flange also arranged in said receiver and forming the bearing for the other side of said diaphragm, substantially as and for the purposes described.

2. The combination with the telephone-receiver and its diaphragm, of an annular groove or channel arranged in said receiver, a series of balls in said channel and adapted to form the bearing for one side of the diaphragm, and an annular curved ange, of a diameter equal to the diameter of the channel, also arranged in said receiver and adapted to form the bearing-surface for the other side of said diaphragm, substantially as and for the purposes described.

In testimony that I claim the foregoing I have hereunto set my hand this 8th day of February, 1896A ALFRED GARTNEE.

Witnesses:

DUNCAN M. ROBERTSON, BENJAMIN OARLEY.

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