US1577270A - Telephone receiver - Google Patents

Description

March 16 1926.

J. S. TIMMONS 'fELEPHONE RECEIVER Filed Feb. 25; 1922 2 Sheets$heet March 16 1926.

' J. S. TIMMONS TELEPHONE RECElVER Filed Feb. 25, 1922 2 Sheets-Sheet Patented Mar. "16, 1926.

PATE OFF-ICE.

JOHN s. TIMMONS, or PHILADELPQIA, PENNSYLVANIA."

TELEPHONE RECEIVER.

Application filed February 25, 1922. Serial No. 539,069.

To all whom it may concern:

.Be it known that'I, JOHN S. TIMMoNs, a citizen of the United. States, residing in Philadelphia, Pennsylvania, have invented a Telephone Receiver, of which the following is a specification.

One object of this invention is to provide a novel form of sound amplifier for use in connection with a telephone receiver, which shall be not only highly efiicient under operating conditions, but shall also be simple,

inexpensive and compact in construction.

It is further desired to provide a form of sound amplifier which in addition to the above characteristics, shall include a horn of novel construction, together with novel means for supporting and concealing the same, as well as protecting it and its associated telephone receiver.

Theseobjects and other advantagedus ends I attain as hereinafter set forth, reference being had to the accompanying drawings, in which,

Fig. 1 is a perspective view illustrating the containing casing forming part of my invention;

Fig. 2 is a side elevation part-1y in vertical section, illustrating the detail construction of my device; and

Fig. 3 is a plan of the horn with its attached screen.

In the-above drawings, 1 represents a box or casing preferaby of wood, which may be highly polished or suitably ornamented as desired and which has one end 2 removably held to it by a series of screws 3. This end has formed in it a substantially rectangular or other suitably shaped opening covered by a relatively fine mesh wire screen 4. This front end 2 of the box also has attached to it and supports a coiled sound amplifying device in the form of a metallic or other suitablehorn 5, preferably though not necessarily of rectangular cross section and so formed that its small end is curved or formed in such shape as to extend through its body portion.

The large end of said horn is rigidly connected to the end 2 of the box and has substantially an area of opening equal and similar in formto that in the box end, with which it is connected by bolts 6 and from which it is acoustically insulated by cushioning material such as cork or the like. Fixed in any suitable manner to the small end of the horn, which in this case protrudes from the lower side of the body, is a loud speak ing or other suitable telephone receiver 7 which may be of any desired construction. The terminals for this receiver are connected to two binding posts 8 and 9 mounted in the present instance on the lower portion of the end 2 of the container 1,

From the above description it will be seen that a given length of horn 5 is disposed in a relativelycompact manner such that while occupying the minimum of space, it none the less gives a relatively great amplification of the sounds produced by the receiver 7 The latter occupies an otherwise vacant space in the casing, which is preferably of rectangular section and altogether the whole instrument is substantial, efficient and compact.

I claim: 1. A. sound amplifying device comprising a horn of graduated diameter coiled inter mediate its ends in the direction of its length, the small end of the horn inter end of the horn intersecting and extendingdiametr'ically through the larger portion thereof, whereby the convolution of the coil is confined to a single plane transverse to the plane of the discharge orifice of the horn.

' JOHN S. TIMMONS.

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