US1393470A - Phonograph-cabinet - Google Patents

Description

J. H. WEBER.

PHONOGRAPH CABINET.

APPLICATION FILED AUG.14, 1920.

13,393,47 Patented Oct. M, 1921 IN VEN TOR.

ATTORNEYS.

inseam.

To all whom it may concern:

Be it known that I, JAcoB H. WEBER, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Phonograph- Cabinets, of which the following is a full,

clear, and exact description.

This invention relates to sound reproducing machines and particularly to the inclosed or concealed amplifier type of phonograph. In ordinary phonographic machines, the motor, which is comparatively heavy and has numerous moving parts, is mounted in the cabinet, adjacent its upper end, while the lower portion of the cabinet usually carries but a few records, whose total weight is comparatively small. The parts of the heavy motor by their support in the upper part of the cabinet while moving during a repro duction, impart to the upper end of the cabinet their mechanical vibrations, and the result is that the cabinet amplifies the sound of the motor simultaneously with the reproduction, which is an effect very displeasing to those who appreciate the finer qualities of music. The ordinary cabinet type of machine has a prism-like shape, so

that the side walls readily flexto some extent and offer little resistance to the vibrations of the cabinet. The vibrating walls of the inclosed amplifier also set up vibrations in the air of the substantially closed area between-the amplifier and the walls of the cabinet, and these vibrations of the confined air likewise cause vibrations of the cabinet walls. The most satisfactoryreproduction is obtained where the amplification occurs entirely in the amplifier and is substantially unaffected by any auxiliary vibrations of the cabinet such as those' caused by the transmitted vibrations ofthe amplifier and the motor.

An object of my invention is to provide a cabinet for talking machines which will, by the nature of its construction, exert a maximumresistance to vibration and which is light and rigidin construction. A further object is to provide a cabinet for this purpose which is simple in construction, attractive in appearance and comparatively inexpensive to manufacture. Other objects and advantages will be apparent from the following disclosure and the novel features of y invention i l be particularly pointed out in claims.

Specification of Letters lEatent.

JACOB H. WEBER, OF BROOKLYN, NEW YORK.

Patented oeaii, iaai Application filed August 14,1320. Serial No. 403,508.

My invention comprehends the construction of a cabinet in which each side wall acts as a thrust resistance to the vibrations of the cabinet, and may conveniently be of a shape of a. pyramid or cone, and preferably a truncated cone or pyramid.

In the accompanying drawings Figure 1 is a perspective of a cabinet constr glicted in accordance with my invention, an

Fig. 2 is a side elevation of the same.

In the illustrated embodiment, which is my preferred construction, the cabinet body 1 is of the shape of a truncated pyramid, and has a similarly shaped cover 2, with a shorter altitude. The lateral or side walls 3 preferably all converge upwardly so that each of theconverging walls, by the acute angle it makes with the remainder of the cabinet, will receive from the cabinet vibrations a component force that acts along the length of the wall as a thrust. The other component will be vertical and therefore ineffective to produce movement of the cabinet. Thus the lateral or side walls by a thrust action, will resist any tendency to lateral or vibratory movement of the cabinet which would be caused by the transmitted vibrations of the motor, or motor and amplifier. The cover 2 may be of any desired shape but I have found the short trunoated pyramidal shape to be preferable with respect to both acoustical results and appearance. The cabinet is provided with the usual closures 4 at the emitting end of the inclosed amplifier, the closures preferably having therein an ornamental grill 5, and a dust proof fabric (not shown) behind the grill. In the lower part of the cabinet I 0rd storing compartments 7. Any suitable 7 motor 8, amplifier 9, tone arm 10, sound box 11 and record support 12 or other sound reproducing mechanism may be operatively supported within the cabinet in the usual manner.

It will be seen that by the converging lateral or side walls, the cabinet is stiffened against lateral vibrations, and consequently the sound emitted by the amplifier will be substantially unmarred by the vibrations of the cabinet. While I have illustrated as my preferred embodiment of the invention, a cabinet of theshape of a truncated pyramid, it is to be understood that this is for the urpQSQ 9f illustration only and that various changes in the details may be made within the principle andscope of my invention.

I claim:

1. A phonograph comprising a cabinet having opposite lateral walls converging above the same, and sound reproducing and amplifying means operatively supported within the cabinet.

2. A phonograph comprising a cabinet having a body portion of the shape substantially that of a truncated pyramid, and phonographic mechanism operatively supported within the cabinet.

3. A phonograph comprising a cabinet the transverse horizontal sections of which become progressively greater in area from the top to the bottom, and phonographic mechanism operatively carried within the cabinet.

4. A phonograph comprising a cabinet having at least two lateral walls converging upwardly, and sound producing mechanism operatively supported within the cabinet.

In witness whereof, I hereunto subscribe my signature.

JACOB H. WEBER.

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