US1363482A

US1363482A - Robert l

Info

Publication number: US1363482A
Authority: US
Publication date: 1920-12-28
Anticipated expiration: 1937-12-28

Description

R. L. POE.

, SOUND REPRODUCING INSTRUMENT.

APPLICATION FILED IAN. I6, I9-I7.

Patented Dec. 28,1920.

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SOUND REPRODUCING INSTRUMENT.

APPLICATION mm JAN. 16,-1917.

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Dw R UNITED STATES PATENT oFFicE.

ROBERT L. POE, OF CHICAGO, ILLINOIS, ASSIGNOR T0 SHELLOPHONE TALKING MACHINE (20., OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

SOUND-REPRODUCINGF INSTRUMENT.

Specification of Letters Patent.

Patented Dec. 28, 1920.

apply a shell, such as a coiled or convolute sea shell of the conch or similar types. I have found such a convolute sea shell to be most advantageous when combined with a sound-reproducing machine, since the natural sea shells are seamless in construction, and very highly polished on their interior surface, the effect being, when joined to the tone arm of a talking machine, for example, to increase and clarify greatly the transmitted sound. I more fully describe andexplain my invention in the following specification, and have shown it in the accompanying drawings, in which Figure 1 is a plan view of a disk type of talking machine embodying my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a front elevation of the same. Fig. 4 is a detail of the application of the shell to the continuation of the tone arm; and

Fig. 5 is a side elevation of the construction shown in Fig. 4.

Like numerals refer to like elements throughout the drawings.

In the embodiment of my invention shown in the drawings, 10 represents generally a talking machine box containing the usual motor mechanism indicated in dotted lines in Figs. 1 and 2 by numeral 11, the usual form of winding handle 12 being shown. A rotatable disk 13 is provided above the machine, upon which is carried the record 14. A reproducer 15, carried by the tone-arm 16, carries a needle, or the like, 17 resting upon the record and adapted to be vibrated thereby, as is well known. The tone-arm 16 is pivotally mounted in a sleeve 18, from which leads downwardly a non-rotating continuation of the tone-arm 16 constituting a sound duct 19. The sound duct terminates in an 'angularly disposed elbow 20, see Fig. 3,

atmosphere through the aperture or opening 10 in one side of the box 10.

When a record is being played upon this type of machine, the sound will be conducted through the tone-arm 16, sound duct 19, through elbow 20, and into the innermost whorl of the shell 22, from whence it will travel about the convolutions thereof until it emanates through the enlarged opening 22 to the atmosphere.

While I have illustrated my invention as embodied in a disk type of machine, it will be obvious that it is applicable to any of the well. known types of soundreproducing machines as well as musical instruments. Also, it is to be understood that while I have shown and described a sea shell, any form of shell, artificial or otherwise, of a similar nature is within the contemplation of my invention, and I do not wish to be restricted to the form shown or described except as defined in the appended claims.

What I claim is:

1. In combination with a sound repro ducing means, a conduit for sound waves from said means, and a convolute sea shell having an inlet aperture in communication with said conduit, and. an outlet for the sound wavesto permit emission of sound I waves transmitted to said inlet aperture.

2. In combination with a sound reproducing means, a conduit for sound waves from said means, and a convolute sea shell having an aperture leading from the inner whorl thereof, said conduit being in communication with said aperture and thereby said inner whorl, said shell having an outlet for sound waves transmitted to said aperture.

3. The combination in a sound reproducing instrument, of a convolute sea shell connected to the reproducing element of said instrument and pierced at its small end to provide an inlet for the sound waves emanating from said element,'the naturally ocing instrument of a oonvolute sea shell incurring opening at the large end of said terposed in the sound passage of said instrushell forming an outlet for said sound Waves, ment in such wise that the sound waves may 10 said shell serving to amplify the sound and pass therethrough. 5 to improve the tone quality thereof during In testimony whereof, I have subscribed its passage therethrough. my name.

4:. The combination in a sound reproduc- ROBERT L. POE.