US1410234A - Phonograph turntable - Google Patents

Description

F. W. WILLIAMS.

PHONOGRAPH TURNTABL E. APPLICATION FILED JUNE 9, 1919.

1,410,234. Patented Mar. 21, 1922.

UNITED STATES FRANK W. WILLIAMS, OF CHICAGO, ILLINOIS.

PHONOGRAPH TURNTABLE.

T 0 all whom a may concern:

Be it known that I, FRANK W. VVILLIAMs, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Phonograph Turntable; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates more particularly to an improved type of phonograph turntable wherein a one piece metal retaining ring is spun into place around a laminated disk, for holding a layer of felt in place to provide a frictional surface upon which a disk record may be placed.

It is an object of this invention to provide a phonograph turntable with a one piece ring for holding a felt covering in place.

A further object of the invention is the construction of a laminated phonograph record carrying disk having a felt covering held in place by means of a one piece ring the lower margin of which is spun in- I wardly to engage underneath the disk after the ring has been mounted in position.

It is an important object of this invention to construct a phonographturntable of simple and effective construction, by securing a friction covering upon a disk by means of a one piece metal ring.

Other and further important objects of this invention will be apparent from the disclosures in the specification and drawings.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a top plan view of a turntable embodying the principles of this invention. Figure 2 is a transverse section thereof.

Figure 3 is an enlarged fragmentary detail section taken on line 33, of Figure 1.

Figure 1- is an enlarged bottom plan view of the turntable supporting bushing.

As shown on the drawings:

The reference numeral 1, indicates a metal supporting bushing or hub member, having integrally formed thereon a flat flange 2, provided with a plurality of apertures to permit screws and threaded into a flat record carrying disk, to hold the disk in place. The disk as shown is laminated and embraces four lay- Specification of Letters Patent.

3 to be engaged therethrough Patented Mar. 21, 1922.

Application filed June 9, 1919. Serial No. 302,704.

ers, 4, 5, 6 and 7 of wood or other suitable material. The top layer 7, is smaller in diameter than the three lower layers, and thereby affords a continuous peripheral groove at 8. Stretched flatly across the top layer 7, is a friction covering 9, made of felt or similar material. The margin of the felt covering 9 is securely held seated in the groove 8 by means of a one piece metal ring 10, the upper margin of which is curved inwardly at 11, to rest upon the margin of the felt covering 9. The one piece ring is engaged over the felt covering and the laminated disk from above, and has the lower margin thereof unformed. After the ring is seated in position the lower margin thereof is bent or spun inwardly to form a retaining flange 12, which as clearly shown in Figures 2 and 3, tightly engages against the bottom surface of the lowermost layer 4 of the laminated disk.

As described, is will be seen that the phonograph record carrying turntable is of simple construction, adapted to be readily assembled with the border ring 10, spun into position around the edges of the laminated layers a, 5 and 6, to securely hold the felt covering 9 stretched in place to form the top of the turntable.

I am aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

A phonograph turntable embracing a disk made up. of a plurality of layers with the uppermost layer of less diameter than the others to afford a peripheral groove, a friction covering positioned on said uppermost layer with the margin of the covering disposed in said groove, and a one piece ring engaged around the disk with the upper margin of the ring seated in said grooi e upon said covering to hold the covering stretched in place, said ring having the lower margin engaged underneath the disk, whereby the laminated portions are also held together.

In testimony whereof I have hereunto subscribed my name in the presence of two

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