US616953A - Telephone-receiver - Google Patents

Description

No. 6l6,953. Patenfed Jafi. 3, I899.

- .1. J. MULGONBOY. v

TELEPHONE RECEIVER.

(Application filed May 7, 1898.)

(N o M 0 del.)

FIG. 1-

17* INVENTOR:

WITNESSES:

UNITED STATES PATENT OFFICE.

JAMES J. MULCONROY, OF PHILADELPHIA, PENNSYLVANIA.

TELEPHONE-RECEIVER.

SPECIFICATION forming part of Letters Patent No. 616,953, dated January 3, 1899.

Application filed May 7, 1898.

To all whom it may concern.-

Be it known that I, JAMES J. MULOONROY, a citizen of the United States, residingin the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Telephone-Receivers, of which the following is a specification.

My invention relates to the class of devices which are adapted to be applied to the ear pieces of telephone receivers, to insure their tight and accurate application to the ear, and, in consequence, to improve the acoustic or auditory properties of the receivers.

To the foregoing ends my invention comprehends the improved ear-cushion hereinafter described and claimed.

In the accompanying drawings, which illustrate a form of ear-cushion embodying my improvements,-

Figure 1 is a front view of the said cushion applied to a telephone receiver; and,

Figure 2 a side sectional elevation of a receiver to which the said cushion has been applied,-the ear portion of the said receiver and also the cushion itself being represented in central section.

In the drawings,

A represents a telephone receiver, composed of vulcanized or hard india rubber, or other suitable material, and of the type commonly used by the Bell Telephone Company in their long distance instruments.

at is the ear openingin the ear-piece a of saidreceiver, and a the diaphragm exposed through said opening.

B is my improved ear-cushion, composed o ordinary or soft india rubber, or other similar material, formed with a central aperture a which is concentric with the ear-opening a in the receiver.

This cushion is preferably of the general contour represented in the drawings, that is to say, is a hollow, shell-shaped, or cup-like,

structure, which embodies circumferential outer walls I) adapted to be sprung over and to tightly embrace the outer rim or edges of the ear-piece a of the receiver, and also an ear receiving throat or concavity b, the side Walls or sides I) of which converge from their outer to their inner edges, at their inner edges form the aperture a and at their outer edges are Serial No. 679,977. (No model.)

connected or merged with the outer circumferential walls I) of the cushion, conveniently through the intervention of the circular flanged shoulder b which bears internally upon the outer front edge of the ear-piece a.

As a result of the foregoing construction, it will by reference to the drawings be apparent that a circumferential annular air space b is formed between the outer face of the ear-piece of the transmitter and the inner surfaces of the throat sides b and the flanged shoulder 11 of the ear-cushion.

By reason of the conformation of the earcushion to be thus formed with an annular air space within it and between it and the ear-piece of the receiver, the entire throat or ear-receiving portion of the ear-cushion is adapted to yield or be compressible to conform it to fit or fill closely into the external ear or auricle of the person using the instrument.

The precise form of the convolutions and heads into which the members of the earcushion are formed is not essential but simply serves to add to the ornamental appearance of the cushion as an entirety when applied to the receiver.

The device can be readily applied to any of the usual forms of receiver embodying approximately flat outer-faced ear-pieces, and when applied will retain itself in position by the tendency of its extended outer walls to contract and remain contracted upon theoutside rim or edge portion of the ear-piece of the receiver.

By varying the thickness and general proportions of the sides b of the ear-receiving throat I), and of the circular flanged shoulder b connective of said throat sides and the outer walls I), the degree of compressibility of the ear-receiving throat of the cushion as an entirety may be Varied to cause it to yield easily to conform itself to ears of different sizes.

Having thus described my invention, I claim- 1. As an article of manufacture, a cushion for a telephone receiver, composed of yielding material, and constructed as an annular body of approximately semi-cylindric transverse section, the outer edge of which is adapted to grasp the rim of a receiver, the inner edge of which is adapted to rest freely or unsecured against the end face of a receiver, forming an air cushion between its inner and outer edges, substantially as set forth.

2. In combination With a telephone receiver, a cushion formed of yielding material shaped as an annular body of approximately semi-cylindric transverse section, its outer edge tightly embracing the exterior of the receiver, its inner edge resting freely or unsecured against the end face of the receiver,

and its intermediate portion elevated froni the surface of the receiver to form an air chamber, substantially as set forth.

In testimony that I claim the foregoing as 15 my invention I have hereunto signed my name this 29th day of April, A. D. 1898.

JAMES J. MULOONROY.

In presence of- J. BONSALL TAYLOR, F. NORMAN DIXON.

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