US892520A - Apparatus for phonographs and graphophones. - Google Patents

Description

No. 892,520. PATENTED JULY '7, 1908; J. 0. HIRSGHFBLDBR.

APPARATUS FOR PHONOGRAPHS AND GRAPHOPHONES.

APPLICATION FILED MAR. 7, l908.

onnion .JOS EEH OAKLAND HIRSCHFELDER, OF SAN FRANCISCO, CALIFORNIA.

Specification of Letters Patent.

APEARATU FOR PHONOGRAPHS AND GRAPHOYHONES.

Patented July 7, mos.

Application filed nmh 7, recs. ficriai No. 420,610.

To all whom it may concern: Be it known that I, JOSEIH OAKLAND Hrasonrnrnnn, citizen of the United States;

residing at San Francisco,

in the county-of San Francisco and State of California, have invented certain new and useful Improvesupport.

ments in Apparatus for Grapho bones and Phonographs, .of which the fol owing is a specification.

- My invention relates to improvements in the sound-box,sound-conducting tubes and horns-winch are used in connection with graphophones, honogra hs, talking-machines and the h e soun producing Instruments, and it has for its object the construction of these several. parts in such manner as to prevent their undue vibration by the sound waves Ipassing therethrou h.

In t e accompanying awin representing a sectional view of a soundox, econducting tube and horn of a graphophone or phonograph there is shown my improved ining a plied to said parts.

-1 is t e sound box, 2 the'conducting tube, 3 the elbow, 4 the horn and 5 the bracket or 6 desi nates the lining ap lied to the interior of t e before designate parts.

As the result of my-exper1ments I have found that by providing the conducting tube or elbow of the horn, and the horn with a lining made in one piece, or by making said parts in two pieces and providing each with a separate lining of sound deadening material, I am enabled to avoid all vibrating edges and to produce a structure free from secondary or accessory vibrations, thereby softening or deadening the sound waves, and relieving the instrument from the metallic or harsh effect of'such sounds and thusvpreserving the natural tones either of the human voice or of instrumental music when reproduced thereby.

'In the carrying out of my invention I have found that by lining the sound box, as well as the sound conducting tube and horn, with a soft non-sonorous material of a Wax-like nature such as wax, or a composition of which wax is an in edient', I accomplish the desired result. l rie com ound may be heated to a degree of fluidity sufficient to enable me to supply the same as a coating or,

parts as described. In the use of apparatus constructed in faithful reproduction'of the record which is sound-conducting tubes and horns made of dining of the desired thickness to the interior of the part, thereby producing a smooth} sound receiving and sound-conducting body t .1

of even thickness". I

The'lining may be a plied in one of a nuniber of ways. it may be liquefied by heat or i by a solvent and applied by dipping, orby means of a brush, or by pouri t ,a hquefied material into-the interior of t e pfarts and turning such parts until the lining material has been evenly distributed over the same and has solidified thereon. The parts may be split and also be applied in" the form of a sheet of the material instead of coating accordance with my invention I have found that the sound produced therefrom is free from unnatural v1brations, is sonorous, and a being reproduced, whether thesame be that v, of the human voice in speaking or singing,

or that of musical instruments.

Preferably the coating which I have de- I scribed herein is used in connection with papier-ma'ch, although other material may e em loyed for the making of these parts; Wine 1 have described herein the preferred embodiment of my invention, it-will S5 departing from be understood that various be made therefrom without the scope thereof.

I olalni: q 1. A graphophone, phonograph, or the like instrument, having its sound receiving and conducting parts coated on the inside with a non-sonorous material of a wax-like. nature which is adapted to be a plied thereto while departures may in a li uid condition an which will hardcnflg and a are to the surface to which it isfnpplied. i m

instrument, having its sound receiving?and;

conducting parts coated on the insidefwitl'pa non-sonorous material of a wax-like natuingfl ol) that is soluble under heatand will adhere wheli the lining applied thereto, and 6 the parts then reassembled. The lining may 5-;

the same on the v 2. A graphophoi e, phonograph, or the,

s ound receiving and gibnductil ig ap aratus tesiaim ony whereof I aflizi niy signature therefor made from paipier-mfich an coatgd 1n presence-of two witnesses on the mslde wlth a non-sonorous matenal o'f a wa.xlike nature which adafjted'to be. JOSEPH OAKLAND HIRSOHFPLDER' 'Qapghed therpto While in a hquid condition Witnesses: I

an which W111 harden and adhere to-the sur- DANIEL BLOCK,

- frige' to which it 1 applied. FRANK MANDEL.

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