US1675343A - Sound reproducer - Google Patents

Description

July 3, 1928. 1,675,343

' T. GRAHAM SOUND REPRODUCER Filed Jan. 19, 1926 IIIIIIIIIIIIIIIIIIIIII Patented July 3, 1928.

PATENT OFFICE.

THADDEUS GRAHAM, OF LOS ANGELES, CALIFORNIA..

SOUND REPRODUCER.

Application filed January invention is to provide an improved radio loud speaker horn, which is formed of a I novel material for this purpose, and which has better reproducing qualities than those heretofore constructed.

With the foregoing and other objects'in view which will be made manifest in the following detailed description and specifically pointed out in the appended claims, reference is had ,to the accompanying drawings for an illustrative embodiment of the invention, wherein: V

Figure 1 illustrates a front view in elevation of the improved horn,

Fig. 2 may be considered a side elevation of the horn, and

Fig. 3 is a sectional view through the horn.

Referring to the accompanying drawings wherein similar reference characters designate similar parts throughout, the improved horn may be constructed in'any desired shape, and the essence of the invention resides in the fact that the interior surface of the horn is provided by leather. I have discovered that in using leather for sound reproducing constructions this material is very satisfactory, it being the closest material to that of the human throat, tending to cause the sounds reproduced to have that quality capable of being emitted from the human throat. In constructing such a horn the complete body of the hornnnay be,

formed entirely of heavy or relatively stiff leather. Preferably, however, the horn consists of a shell generally indicated at 10, which may be formed of wood or metal and which is lined with a leather lining ll. The horn is generally conical in form and may assume any desired shape with the sound reproducing unit or radio unit 12 fastened to it at its small end. A peculiar feature of the improved horn resides in the particular arrangement of the leather 11. The leather which is preferably used is that which has its hair removed, the hair side being the smooth side of the leather. The opposite 19, 1926. Serial No. 82,221.

side, commonly known as the flesh side of the leather after it has been tanned, is usually rough, there being fibers projecting to cause the leather to have a fuzzy appearance on the flesh side.

Regardless of whether the horn is formed completely of leather or is merely a leather lined horn, the leather is so arranged that the flesh side is that which is exposed on the interior of the horn. This produces a very fine horn in that the fuzz on the flesh side tend to reduce echoes from side to side of the horn, so that a clear even tone will be emitted.

While it may be possible 'to provide compositions-as a substitute or equivalent for the leather, it is essential that the material used have practically leather, and it should have the fuzzy interior surface of the leather to reduce the cchos mentioned. This fuzzy surface can in some instances be provided by roughening the interior surface of the material used. v

By the above described construction a very efficient horn is provided in so far as sound reproducing qualities are concerned, causing the sound reproduced to be very clear in quality and reducing the megaphone eflect common to many horns formed of wood and equivalent compositions.

It Will be understood that various changes in'the detail of construction may be made without departing from the of the invention as, defined by the appended claims.

I claim:

1. A sound reproducer including a hornlike body which is lined with leather, the flesh side of the leather being exposed on the interior of the horn.

2. A sound reproducer comprising in combination a horn-like body of comparatively stiff material, said body bein lined with leather, the flesh side of the feather being exposed on the interior of the horn so as to present a rough, soft, fleecy surface, whereby vibrations issuing from the source of disturbance will be artially absorbed on said surface, causing tlie sound reproduced to be clear in quality.

the same resiliency as.

projecting fibers or the spirit or scope 3. A sound like body which is reproducer including a hornlined with a soft material, there being relatively small, minute fibers projecting from said material on its 5 inner surface so as to give the same a fleecy appearance on its inner side, whereby vibrations 1ssu1 ng from a source of disturhence will be partially absorbed by said fibers, and the reflected disturbances will be improved in quality.

In testimony whereof I have signed my name to this specification.

I THADS. GRAHAM.

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