US1485912A - Phonograph connection for telephone receivers - Google Patents

Description

March 4 1924,

J. J. GHEGAN PHONOGRAPH CONNECTION FOR TELEPHONE RECEIVERS Filed April 13 1923 O R m. m V W q/fla ATTORNEY Patented Mar. 4, 1924.

JOHN J. GHEGAN, OF EAST ORANGE, NEW JERSEY.

PHONOGRAPH CONNECTION FOR TELEPHONE RECEIVERS.

Apnlication filed April 13, 1923. Serial No. 631,815.

To all whom it may concern:

Be it known that I, JOHN J. GHEGAN, a citizen of the United States, and a resident of East Orange, county of Essex, and State of New Jersey, and useful Improvements in Phonograph Connections for Telephone Receivers, of which the following is a specification.

The objects of this invention are to provide simple, practical and inexpensive means for the attachment of the receiver of a radio set to the horn of a honograph for the purpose of utilizing the atter as a loud speaker and to provide such means in a form readily adaptable to the various styles of telephone receivers and phonographs new in use;

In the drawing accompanying and forming part of this specification I have illustrated the invention embodied in one of its simplest forms, but wish it understood that the structure may be varied more or less without departure from the broad spirit and scope of the invention hereinafter defined and claimed.

Figure 1 in the drawing is a broken and part sectional view illustrating the invention as in use with a phonograph of the Victrola type, only the end portion of the tone-arm which is connected with the horn being shown.

Figure 2 is a perspective and sectional view showing the two parts of the attach-' ment in separated relation and as about to be engaged with the opposite sides of the detached ear cap of the receiver.

In Figure 1 a portion of the tone-arm which is connected with the amplifying horn and forms a part of the sound conduit is indicated at 5 and the same is shown as carrying a pivoted gooseneck 6. The sound box or reproducer is ordinarily secured on the end of this gooseneck, but the connection is such that it may be readily removed.

My invention takes advantage of this feature ofremovability of the sound box and involves a connection which is readily attachable to an ordinary telephone receiver and is engageable with the end of the tonearm from which the reproduoer has been detached.

This connection comprises in the present disclosure, a sleeve 7 of a size to frictionally fit the neck of the'tone-arm, having at one endan interiorly screwthreaded part 8 constituting a nut for engagement with an exhave invented certain newteriorly screwthreaded tubular stem or sleeve 9 which has an outstanding shoulder or flange 10.

The threaded sleeve is made of a size to pass through the sound outlet 11 ordinarily provided in the center of the ear cap 12, and the flange is made quite thin so as to lie within the relatively narrow air space or sound chamber 13 usually left between the back of the ear cap and the face of the diaphragm 14. The connecting sleeve 7 is preferably made smooth toshde easily over the end of the tone-arm and may be slotted as indicated at 16 to allow for adjustment to fit different sizes of tone-arms.

In the usualconstruction of radio receivers the ear cap is detachably secured to the case 16 of the receiver by a screwthreaded joint at 1 and the ear cap is therefore quite readily removable.

To use the invention the screwed from the receiver, the threaded sleeve is passed through the central perfo-' ration in the cap, from the inside, the nut is turned down over the projecting end of the screw sleeve until the wall of the receiver cap is firmly clamped between the two parts of the screw. connection, then the ear cap is ear cap is unreplaced on the receiver and the receiver is n:

then applied as a unit to the tone-arm b slipping the connecting sleeve over the noel; of the tone-arm.

The invention, it will be seen, takes advantage of the structural features of both a";

the telephone receivers and phonographs which are in every day use and provides a way by which any one at a minimum of expense may readily co-ordinate the two instruments.

What I claim is: 1. In combination with a telephone receiver having a diaphragm and an ear cap detachably engaged thereover in closely spaced relation and provided with a sound passage at the center thereof, a tubular screw extending through said passage and having a thin flange disposed in the narrow space between the diaphragm and ear cap and bearing against the inner face of the ear cap, a nut engaged over the-projecting portion of the screw and bearing against the outer face of the ear cap and a sleeve carried by said nut for engagement with the neck of a honograph tone-arm.

2. I 31 combination with a telephone receiver having a diaphra and an ear piece are detachably engaged thereover and perforated for the passage of sound waves, a sleeve constructed for detachable engagement with the tone-arm of a phonograph and adjustable screw. means for clamping engagement with the ear cap through the perforated portion thereof.

3. Means for attaching a telephone receiver to a phonograph tone-arm comprisin a tubular screw of a size to pass througfi the central sound passage in the ear cap of a telephone receiver and having a thin flange for engagement with the inner face of the ear cap, a nut for engagement with that part of the screw WhlOll projects through to the outer face of the ear cap and adapted for engagement with said outer face of the cap, whereby said parts can be firmly clamped to the ear cap and a tubular extension carried by the nut and constructed for detachable engagement with the end of the phonograph tonearm.

4:. Means for attaching a telephone receiver to a phonograph, comprising a sound transmitting sleeve detachably engageable with the sound conduit of a phono aph and adjustable screw means for rmly clamping said sleeve in projecting relation on the outer face of the ear piece of a telephone receiver, said screw means having a part for extending through a sound passage in the ear cap to enable clampin ment with the ear cap at both the inner and the outer'faces thereof.

5. A connector of the character disclosed, comprising screw means constructed to extend through a sound passage in the ear cap of a telephone receiver, having shoulders for clamping the wall of the cap therebetween and a device held by said screw means at the outside of the ear cap for connection with the sound conduit of a phonograph.

In witness whereof, I have hereunto set my hand this 9th day of April, 1923.

JOHN J. GHEGAN.

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