US1644670A - Cabinet - Google Patents

Description

T. A. EDISON CABINET Filed 112111.31, 1925 anal EY \NVENTOR Oct; 11, 1921.

Patented Oct. 11, 1927.

UNITED STATES PATENT OFFICE.

THOMAS A. EDISON, OF WEST ORANGE, NEW JEREEY, ASSIGNOR TO THOMAS A. EDISON INCORPORATED, OF VEST ORANGE, NEVJ A CORPORATION OF NEW JER- SEY.

CABINET.

Application fi1ed January My invention relates to cabinets, and while directed particularly to the enclosed horn type of phonograph cabinet in which a closure is provided for the exit opening of the horn or sound amplifying compartment, such opening usually being provided opposite the mouth of the phonograph horn or amplifier and in the front side Wall of the cabinet, my invention is also applicable to other types of cabinets having sound am plifying or other similar compartments or chambers, such, for example as the cabinets of radio receiving sets of the type provided with an enclosed amplifier or loud speaker.

In the case of many phonograph cabinets of the character referred to the closure for the exit opening of the horn or sound amplifying compartment consists of a grille or grating having applied to the inner side or back thereof a fine mesh screen, such as a screen formed of silk or other suitable fabric. Closures of this character are usually mounted so that they can be easily removed in order that ready access may be had to the horn or sound amplifying compartments.

Closures of the construction just described for phonograph cabinets and other similar cabinets, are open to certain objections, some of which will now be explained. The grilles of such closures areexposed to view and in order that they may present an artistic appearance are usually formed of wood and are of intricate and delicate design. Such a grille has to be very carefully cut and finished, rendering the same expensive to manufacture, and moreover is a dirt catcher and is difficult to clean and keep clean; In a closure of the type referred to some, at least, of the adjacent solid sections of the grille are spaced a considerable distance apart and accordingly the screen, usually formed of silk or other light fabric and usually secured to the inner face of the grille only at its edges, is quite likely to be torn, especially in removing the closure. I have also found that the use of a closure of this character results in an impairment of the acoustic qualities of the phonographic reproduction, due to the factthat the sound waves emanating from the amplifier of the phonograph first strike the screen, and cause the latter to vibrate against the grille.

The principal object of my invent-ion is to provide a new form of closure for the exit prising a grille, preferably consisting of a wooden member of the proper size and shape having formed therein numerous and closely adjacent small openings, which need be of no particular shape or size, and a screen preferably formed of line mesh material such as silk, applied to and covering the outer or front face of the grille.

For a clearer understanding of my inventron, attention is directed to the drawing accompanying and forming a part of this,

specification, and in which:

l igure l is a view in front elevation of a phonograph cabinet provided with a closure for the exit opening of the horn compartment, in accordance with my invention,

one corner portion of the screen of the 010- sure being shown as turned down away from the grille; and

l igure 2 is an enlarged fragmental vertical sectional view, partly in elevation, of the cabinet shown in Fig. 1.

Referring to the drawing, reference character l designates a phonograph cabinet provided in the upper portion thereof with a sound chamber or compartment 2 for the usual horn or amplier 3. The front wall of the cabinet is provided adjacent the mouth of the horn 3 with a sound exit opening 4, such opening as shown being rectangular in form. closure of my improved construction. forthe sound exit opening l. The closure A comprises a rectangular frame 5,.the lower bar or section of the frame being provided with a flange 6 and the upper bar or section with a flange 7. When the closure A is in position the flanges 6 and 7 are respectively engaged with grooves 8 and 9 formed in the partition 10, constituting the bottom of the chamber or compartment :2, and in the loweredge of the top front cross-piece 10 of the cabinet' The flange 6 is somewhat less in depth than the groove 8 and accordingly when the closure is in position as shown,

Reference character A represents av the chamber to the exterior of the cabinet, and a composite closure disposed in said opening comprising an inner rigid apertured member a flexible fine mesh screen more remote from said device than said apertured member applied to the outer face of the latter and covering the openings therein, and a plurality of independent spaced members disposed outwardly of the screen, each of said members having fastening means ex tending therefrom through the screen securing such member to the apertured member,

substantially as described.

This specification signed this 29th day of January, 1925. V

THOS. A. EDISON.

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