US1754416A - Phonograph turntable - Google Patents

Description

April 15,1930'.

LE 'BONSIEUR PHONOGRAPH 'TURNTABLE' Filed April 29,? 1927 HHHHM HUIT llLll um #5 ArraP/VEK i' at Patented Apr. l5, 1930 Umax). STATE PArENr oaFicE LE BQNSIEUR, F ELYRIA.,'OHIO, ASSIGNQR TO THE GENERAL INDUSTRIES COMPANY,

, 0F' ELYRIA, OHIO, .A CORPORATION 0F OHIO rnon'oemirn TURNTABLE application mea april ae,

My invention relates to an improved sheet metal'turntable for phonograph disk records.` An object of my' invention is to provide an improved Isheet metal turntable which may be produced rigid in construction by a minimum amount of metal,` wherein ringing and vibration of the same is subdued.

Another object of my invention resides in the provision of an improved disk record ya turntable which supports the record at its broader or peripheral portions, thereby eliminating rocking of the record thereon.

Another object of the invention is to secure the appearance o f a very rugged turntable' it with the edge of asoft facing therefor concealed, and appearing' to be clamped to the underlying turntable portion.

Another object of my invention resides in the provision of an improved sheet metal naturntable requiring a minimum amount of facing material, such as plush, velour or the like, which is quite costly.

Another object of my invention is to prov vide a turntable faced with soft material tt whose edges are so positioned relative to the 'turntable so that they will be protected and not be so exposed as to become scruded, unravelled, or separated from the turntable.

Another object of my invention resides in to the provision of an improved disk record turntable which is attractive in appearance,

of light weight, and which is economical to manufacture in large quantities.

- 'llhese and other objects ofmy .invention from reference to the following description of an embodiment thereof, and inwhich description reference will be had to the accom-4 panying drawings, forming a part of this specication. v

Referring to the drawings:

j 'g. l is a plan view of an embodiment of my invention, the pile fabric covering thereof being partly omitted;

Figs. 2 and 3 are transverse medial sectional views taken on the lines 2 2 and 3-3, respectively, of Fi n. lgand Fig. 4 is an en arged fragmentary sectional view taken on the line 4-4 of Fig. 1.

i 50 Referring to all the gures of the drawa'nd theinvention itself will become apparent 1927. serial ne.' 187,502.

ings, in all of which like parts are designated by like reference characters, my improved disk record turntable preferably comprises a central boss or hub l which is formed of a light metallic casting and has a centrally disposed bore l5 into which the turntable rotating spindle or shaft may project. The hub is provided with an annular flange 3 havingapertures therein for the reception of rivets which may be upset to rivet the hub to the central ortion of the turntable disk 2, concentricaly about the central aperture 13 of the disk. 'llhe turntable disk 2 is preferably formed from pressed sheet metal, the central portion 18 thereof being counter-sunk at to provide a central recess Sdadjacent the disk aperture. The recess 36is of sucient depth that the rivets will not project above the top surface 34 of the disk and con-v tact with a record when` placed upon the turntable. Such a construction eliminates the possibility ofthe record rocking ortilting on the turntable due to a central projection such as the rivets.

A plurality of. concentrically disposed grooves G and 7 and 8 are formed by die stamping the same in the disk and a plurality ,of radially extending grooves 5 which intersect and join at i8 to the grooves 6., 7 and 8 are also stamped in theturntahle disk and provides a turntable which is rigid and stid and wherein vibration or ringing-of the turntable tric groove 8 and adj acenirthe annular groove (20 disposed adjacent to the peripheries of the isk.

`is edectively subdued. The radially extending grooves terminate at 9'beyond the concen- As best shown in lig. 4, an annular dange L 4 is formed in the disk periphery and depends from a flattened bead portion l2 of the disk, which Vflattened bead is the most elevated portion of the disk. The inner edge of the flattened bead is pressed downwardly at 23 on a plane parallel with the annular flange 4 to-provide an upright wall 24 of the angularly shaped annular groove 20. rlhe opposite wall of 25 of the groove is pressed dowrn wardly ona curve from the disk top surface 14 at 28 and joins at the base of the groove 10 with the wall 24 to form' a pointed groove velour disk cover, soft' acing 11, or the like, may extend wherein it is secured by means of'a shellac or other suitable adhesive substance applied to the disk.

The exterior surface of the annular dependingflange and the exterior surface'of the-fiat bead-portion of the disk and a portion of the side wall 24 thereof may be nickel-plated to present the uncovered metallic portions .of the disk of attractive appearance.

The disk 2 is slightly convex in its transverse dimensions from its periphery to thev center thereof whereby a record placed upon the disk will be supported flat thereon to avoid rocking of the same.

The soft surface or velour 11 may be applied to the disk surface 14, by first applying a coating of adhesive substance, such as glueor shellac,thereon, andthen applying the soft. surface 11 to the disk while the adhesive Substance is still plastic and pressing the same onto the disk radially outwardly from the central eyelet 14.` The edge of the soft surface is disposed, when so applied, over the concentric groove 20, which groove has been coated Vwith the adhesive substance prior toplacing the soft surface on the disk.

A tool 31, such as is indicated in Fig. 4 of the drawings, is then rolled in a circular path,

exerting an outward force on the same, along the edge of the cover and forces the same into' pointed recess of the groove and onto the inclined wall thereof which exerts an outwardly pull on the soft surface due to the inclined curved wall 25 of the groove with the result that the cover is stretchedinto a fiat or smooth surface on the disk. The edge of the cover is thusforced into intimate engage-:

ment with the surface of the annular wall 24 of the groove, and being pressed down by the tool 31 before the adhesive has set, will adhere i to said wall andthe selvage will not be visible.

The cover when so applied to my improved disk record turntable, simulates a disk having a cover thereon and a detachable annular ring portion mounted on the periphery of the `disk with the edge of the soft facing concealed under the annular ringand compressed thereunder. 4

At the same time, ythe edge-of the soft surface-will not be exposed to Contact with extraneous objects whereby it may be unrav'e'led and gradually separate from the disk in use.v

I claim:

1. A phonograph disk .record turntable, comprising a pressed sheet metal disk, a supporting hub therefor, a disk of relatively soft surface material secured tol and covering the major portion of the disk, said metal disc being formed with concentric spaced folds, the outer one of said spaced folds providing an annular groove in the metal disk adjacent its periphery dividing the metal disk into a relatively narrow border and inner portions into which the edge of @he soft surface extends, said edge closely engaging the outer wall of the groove and depressed below the level of the turntable border portions, and a depending annular reenforcing flange on the periphery of the disk.

2. A turntable comprising a sheet metal disk having a groove having an inwardly dis- 'posed slightly upwardly inclined relatively In testimony whereof I hereunto aiiix my i .signature this 8th day of April,'1927.

LE BONSIEUR.

By making the disk in one piece economy in manufacture is accomplished without sacrificing sturdiness-.and attractive appearance. Having thus described my invention in al specific embodiment, I amv aware thatnumerous and extensive departures' mayv be made fromthe embodiment herein illustrated and described but without departingv from the spirit of my invention.

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