US1340807A - Telephone-receiver - Google Patents

Description

A. UMHOLTZ. TELEPHONE RECEIVER.

APPLICATION FILED AFRJ, 1919.

Batented; May 18 H20.

AUGUSTUS UMHOLTZ, 0F PGRT CARBON, PENNSYLVANIA.

TELEPHONE-RECEIVER.

Specification of Letters Patent.

Patented May 18, 1920.

Application filed April 7, 1919. Serial No. 288,016.

To aZZ whom it may concern:

Be it known that I, AUGUSTUS UMHOLTZ, a citizen of the United States, residing at Port Carbon, in the county of Schuylkill and State of Pennsylvania, have invented new and useful Improvements in Telephone- Receivers, of which the following is a specification.

This invention relates to telephone receivers or the like, and comprehends the construction to facilitate the use thereof with more satisfactory results.

Frequently, it is found necessary when telephoning to hold the receiver an appreciable distance away from ear for the proper hearing, this being due to the fact that when the receiver is held against the ear, proper air pressure against the car drum is prohibited which of course affects the hearing. Then again, when the receiver is held away from the our either to assist the hearing, or by inexperienced users, the

sound from the receiver can be heard b jothers in the room, thus prohibiting privacy of conversation to a marked degree.

Therefore, it is my purpose to provide the receiver with means whereby the proper air pressure against the ear drum may be had, when the receiver is held against the ,ear, thus overcoming the above enumerated oi jections with the eceiver of the present day use, and perm ing the receiver to be more conveniently and satisfactorily used by all.

The nature and. advantages of the invention will be better apparent when the following detailed description is read in connection with the accompanying drawing,

-i.he invention residing in the construction,

combination and arrangement set forth in the claim.

in the drawings forming part of this specification, like numeralsof reference indicate similar parts in the several views and wherein Figure 1 is a side elevation of a telephone receiver partly in section and constructed in accordance with my invention.

Fig. 2 is a front end elevation.

The nature of my invention is such that the telephone receiver indicated at A of the well known construction may be used and slightly modified in order to embody the principles of the invention. The receiver is provided at its forward end with an en larged annular head or rim 1%, diephragm 11, and a sound receiving opening 12 arranged in advance of the diaphragm and of usual conical formation.

In carrying out my invention, I provide means for admitting air to the sound receiving opening 12 when the receiver is in use, so that the receiver may be held close against the car without in any way affecting the hearing. This means as shown in this specific instance consists in a number of bores 13 which admit of the passage of air from the atmosphere to the ear While the receiver is being used. It is of course to be understood that the bores 13 can be of any size or shape, and can also vary in number, the perforations or passages being disposed in the most convenient manner for the admittance of air between the sound disk or diaphragm 11 and the ear of the user while the receiver is being used. It will be noted that the bores 13 are disposed at an angle so that the inlet extremities of said bores are spaced a considerable dis tance from the forward edge of the receiver, so that the inlet extremities of, these bores cannot be obstructed any way when the receiver is in use. ldaniiiestly, the receiver when constructed in acccrcance with invention permits of its use without necessitating the holding of the receiver an appreciable distance away from the ear thus rendering its use snore convenient and satisfactory to' all, especially inexperienced users.

While I have shown and described What I consider the preferred embodiment of the invention, I desire to have it understood that the same is merely illustrative of one embodiment thereof to which I do not limit myself in this connection, as such changes in the construction and arrangement may be resorted to when desired as fall within the scope oi what is claimed.

What I claim lSiv A sound conveying member havin a con cavity in one end thereof, and a p urality of radially disposed bores communicating with said cavity and openin at the eriphcry of said member, said ores'being in= clined in a direction away from the mouth of said cavity to have their outer ends spaced from the front edge of the member for the purpose specified.

in testimony whereof l afiin my signature.

S UMHOLTZ.

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