US1552032A - Amplifier adapter for telephones - Google Patents

Description

l sept'. 1, 1925. 1,552,032

. H. C. BRANCH I AMPLIFIER ADAPTER FOR TELEPHONES I Filed June l2 1922 |IIIIIIUIIlIII lPatented Sept. l, 1925.

UNITED STATES PATENT OFFICE.-

HARRY c. BRANCH, or CLEVELAND, oHIo, AssIGNon 'rol THE TEAGLH COMPANY, or cnnvELAND, omo, A conrorta'rron or oHIo.

AMPLIFIER ADAPTER FOR TELEPHONES.

Application led June 12, 1922. Serial No. 567,769.

T0 all whom i may concern.'

Be it known that I,`HARRY C. BRANCH, a citizen 'of the United States, residing at Cleveland, in the Vcounty of Cuyahoga and State of Ohio,-have invented certain new and useful Improvements in and Relating to Amplifier Adapters for Telephones, of which the following is a specification, reference beingirnade therein to the accompanying drawing. v I

The invention relates to means for acoustically and mechanically connecting the receiver of a telephone with the small end of a horn, or other sou-nd amplifier, to the tone arm of a. phonograph, for example, theinvention being especially advantageioush` in connection with the telephone receivers""of wireless telephone sets.

The chierl objects of the invention are comprehended in the provision of a simple, unit-ary and inexpensive coupling device by which telephone receivers of various shapes and sizes can be` easily and effective-ly connected acoustically vto various oms 'of phonograph tone arms or other amplifiers.

The preferred embodiment of the invention is shown in the accompanying drawing, in'which Fig. 1 is a' plan view of the main parts of -a phonograph with its sound box removed and a telephone receiver acoust-ically connected to the small end of the tone arm by means of my improved adapter. 4

Fig. 2 is an .\,11lar,f ,1fedcentral longitudinalsection of the adapter.

Figf is an enlarged end view of the adapter.y

Fig. 4 is an enlarged horizontal axial section of t-headapter as mounted in Fig. 1, with the telephone receiver and the end of the tone arm shown in elevation.

Fig. 5 is a view Similar to that in Fig. 4 with the adapter applied to a different form oi phonograph tone arm.

Referring vin detail to the construction illustrated and, at the outset, to the form of construction shown in Figs. 1 to 4, inclusive, 1 designates the case of a. Victor phonograph, 2 the record turn table and 3 the tone arm having the Ushaped small end 3*, the g phonograph sound box and needle having been detached Jfrom the tone arm. The large end of the tone arm 3 is connected in the well-known manner with the phonoproved adapter 6. This adapter, which is in the nature of a tubular'coupling device, is

in the formof a unitary molding of vulcan' ized soft rubber. It is formed at one end with a relatively large seetionL having an opening adapted to receive and snugly grip the peripheral bead or flange of the diaphragm end of the telephone receiver. The

vrubber of which the adapter is lmade is capable of stretching considerably and the adapter is thus capable of fitting practically any of the standard telephone `receiverssaid receivers -dii'ering somewhat/1in diameter. The other end 6b. of the adaptez'F ris made smaller than the end 6 and betweenfthe two ends the ada ter is formed'with an interme-v diate reduce part or neck 6. The opening` or passage through the reduced part 6 is of-a size adapting it to receive the small'end of the tone arm of the Victor phonograph and others, such as the Cheney, whose tone arm ends are com arable in size to that of the Victor. The e asticity of the rubber enables it to fit and snugly hold in the part 6c tone arms differing materially in size.

4However, the ends of the tone arms of some of the widely used makes of phonographs, such as the Columbia and the Edison, are very much larger in diameter than the ends of the tone larm of the Victor phonograph. Accordingly I form the adapter 6 with the end 6" having its passage or openin of a diameter adapted to receive and snug y grip the ends of the tone arms of such p onogra hs as the Columbia and the Edison. In 5 I show the adapter applied to a telephone receiver and the end of the tone arm 7 of a. Columbia phono* rap 't It will be seen that the adapter comprises a'` relatively large section 6 designed to hold the telephone receiver and a smaller section made up of the end 6" and intermediate neck 4fier to which the adapter is attached.

The method of applying and using the adapter will readily be understood. The telephone receiver is easily forced into the larger end of the adapter and the latter can then bereadily applied to the small end of i the phonograph tone arm or other amplier.

T e res isa highly effective acoustic and mechanical coupling of the telephone receiver to the amplifier so that the soundsA emitted from the disc of the diaphra of the receiver are effectivelyy ampliliedmand the receiver is firmly supported by the adapter in any desired position. As the adapter has no metal parts there is no possibility in its use of metallic vibrations or chatter.

By reason of the elasticity of the material of which the adapter is made it is practically universal in its adaptability to iit the diil'erent standard telephone `receivers and the various popular makes of phonographs .and

various sizes and forms of amplifier horns. Obviously, the adapter is exceedingly simple and capable of being produced at a relatively small cost.

While the form of the adapter shown in the drawings is that Which I have found most satisfactory, where the adapter is intended for use only with tubular members orphonograph toney arms such as that of the Victor phonograph, it is obvious that the end section 6* of the. adapter is superiuous and can be omitted. It will also be obvious that the form ofthe adapter can be varied in other respects Without departing from the invention, the scope of the invention being indicated by the appended claims. .l

What I claim is:

1. A device ofthe character described comprising a molded soft rubber tubular coupling formed at one end with a large section adapted to embrace and snugly grip the peripheral flange of the diaphragm end of a telephone receiver and also formed Witlv a smaller section having its passage adapted to receive and snugly grip the end of a tubo: lar member, the Walls of said coupling being thick enough to sustain the Weight of the telephone receiver and firmly hold said re- 6.0 ceiver in any desired position. y

2. A device of the character described comprising a molded soft rubber tubular coupling formed at one'end with an opening adapted to embrace and snugly grip the peripheral Harige of the diaphram end of a s telephonereceiver and with the remainder of its passage having a plurality of different diameters adapted to receive and snugly grip the ends of tubular members of dilerent sizes, the Walls of said coupling being thick enough to sustain the Weight of the telephone receiver and firmly .'nold said receiver in. l any desired position.

3. A device of the character described i5 comprising a molded soft rubber tubular coupling formed with one end larger ,than the other and with a reduced intermediate part, the coupling at its larger end being adapted to receive and snugly grip the'pe- E@ ripheral flange of the diaphragm end of a telephone receiver and at its smaller end and the reduced intermediate part being adapd y alternately to receive and snugly gripthe ends of tubular members of different sizes, 55 the walls ogf said coupling being thick enough to sustain theweight of the telephone receiver and firmly hold said receiver in any' desired position.

n testimony whereof7 l hereunix) am; guy 90 signature.

` HARRY C. BRANCH.

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