US2315398A - Resilient mounting - Google Patents

Description

March 30, 1943. J, CLARK 2,315,398

RESILIENT MOUNTING Filed Nov. 3. 1941 Patented Mar. 30, 1943 '.REsiLIEN'r MOUNTING `lesse Clark, Chicago, Ill., .assigner to Rock-Ola Manufacturing Corporation, Chicago, Ill., a corporation 'of Delaware Application November 3, 1941, ASerial No. 417,631 2 Claims. (Cl. 1*?48--211v This invention relates in general to resilient .mountings, and more particularly to an improved type of spring mounting for preventing the transmission of vibrations between a supporting structure and a frame mounted thereon.

In a multi-record phonograph, such as that disclosed in United States Letters Patent No.

2,159,834, issued May 23, 1939, to Paul H. Smyth,

Jr., the operating mechanism, which includes means for moving a selected or desired record onto a rotatable turntable and into playing position, means for rotating the turntable, and means for playing or reproducing the record, is mounted in an outer casing or cabinet upon a chassis or frame, commonly referred to as a motor board. In the copending application of William H. Hutter, Serial No. 402,833, led July 17, 1941, a multi-part frame for supporting the several parts of the operating mechanism is substituted for the motor board of the Smyth machine, and resilient means are employed to interconnect the diiierent parts of the frame, and to mount the same in the cabinet, which have different periods of vvibration so as to damp out vibrations which would normally be transmitted from one part of the machine to another.

-A principal object vof this invention is to provide an improved type of resilient mounting, and one which may be substituted for that disclosed in the above referred to Hutter application for connecting an operating mechanism supporting frame to an outer cabinet.

Another important object of the invention is the elimination of the possibility of any direct metal to metal contact between a frame and its supporting structure, except through a coil spring, to prevent the transfer of any vibrations therebetween.

A further object of the invention is the provision of such a resilient mounting which will permit limited, universal movement of the frame relative to the supporting structure therefor.

.Another obj ect -of the invention is the provision in such a mounting having normally stationary spring end guides of means for readily adjusting the same relative to each other to eifect proper alignment thereof.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, when taken in connection with the accompanying drawing, discloses a preferred embodiment thereof.

I n the drawing:

mounting embodying the features of the invention, with'only a portion of the supporting structure and of the frame supported thereby being shown;

Figs. 2 and 4 are horizontal sections taken substantially on the lines `2-2, and 4-4, respectively, of Fig. 1; and

Fig. 3 is a vertical sectional view taken substantially on the line 3-3 of Fig. 1.

Referring more particularly to the drawing, reference numeral II indicates a frame member which 'may be construed as part of a frame for supporting vthe operating mechanism of a phono'- graph, as disclosed in the patent and application hereinbefore identified, ii' desired. Similarly, reference numeral I2 represents any structure for supporting the frame I I, or on which the l'atter is to be mounted, such as the outer Acabinet or casing of a phonograph. v

The resilient -mounting of the present invention which is interposed between the frame mem- -ber I I and its supporting member I2 comprises 'a supporting bracket I3, one arm of which is rigid- -ly secured to the member l2 in any desired manner. The other arm of the supporting bracket I'3, which is shown as being in a horizontal posi- -tion vin Eig. 1, is provided-with a pair v-of spaced apertures I4 through which bolts I5 -freely pass 'for threaded engagement with suitable tapped apertures in the lower arm of a spring retaining bracket I5. A lock washer I1 of greater diameter than the apertures I4 is interposed between the lower surface `of the horizontal arm lof the supporting bracket I3 and the heads of leach of the vbolts I5. The spring retaining bracket I-B lis thus rigidly secured in selectively adjusted posi- 4tion upon the supporting bracket I3 for a 4purpose to be later more fully described.

On its upper surface, the vbracket II 6 is provided with a centrally apertured, cup-shaped spring end 'engaging member I8. The aperturein the spring -end engaging member t8 is `aligned #With `an'aperture I extending through 'the bracket-IB (Fig. 3). An aperture 2| of larger diameter than the aperture I9 is similarly provided in the horizontal arm of the supporting bracket I3. A second spring end engaging or guide member 22 is secured in any suitable manner to the lower surface of the frame member II. The guides I8 and 22' engage the lower and upper ends, respectively, of a coil spring 23 which is interposed between the frame member II and the supporting bracket structure.

A bolt 24 is disposed centrally of and extends Figure 1 is an elevational view of a resilient 55 axially through the spring 23,the upper end portion of the bolt being reduced and threaded on its outer surface, as indicated at 25. This upper reduced end portion 25 of the bolt 24 extends through a suitable aperture provided in the frame member I I and forms a shoulder which is adapted to abut against the under surface of the frame member II. A nut 26 is threaded upon the reduced end portion 25 of the bolt 24 to secure the v latter to the frame member I I, and a lock washer 21 may be interposed between this nut and the upper surface of the frame member. The lower` end of the bolt 24 terminates in a reduced portion 28 (Fig. 3) upon which is mounted a sleeve 2'9 of rubber or any other suitable resilient material. The outer diameter of the sleeve 29 is preferably the same as that of the main portion of the bolt 24. At its lower end, the sleeve 29 is engaged by a washer 3| which is held against axial movement on the bolt 24 by a pin 32. The reduced end portion 28 is so positioned relative tothe main portion of the bolt 24 that the sleeve 29 mounted thereon will normally extend through and slightly above and below the apertures I9 and 2I. With this arrangement, the spring 23 will function to resiliently support the frame member II upon the bracket structure I3, I6, and universal movement of the frame relative thereto will be permitted within limits defined by the clearances between the sleeve 23 and the aperture I9, and the washer 3I and the lower surface of the horizontal arm of the supporting bracket I3. Since it is essential that the spring guides I8 and 22' be normally aligned with each other to retain the spring 23 in a vertical position, this may be assured by the adjustment of the upper bracket I6 relative to the supporting bracket I3 through the agency of the bolts I5 and apertures I4.

The upper bracket I6 is provided at its inner end with a vertical arm portion which terminates in a horizontally disposed shelf or flange 33 (Fig. l) An aperture 34 may be provided in this flange 33 in Vertical alignment with a similar aperture 35 extending through the lower portion of the frame member II. In the shipment of a device embodying the features hereinbefore described, it is sometimes found necessary to rigidly anchor the frame member II to the supporting member I2. This function may be accomplished :by extending a suitable belt (not shown) through the apertures 34 and 35, and tightening the same to draw the frame member II downwardly against the action of the spring 23 and into rigid engagement with the flange 33 of the upper bracket I6.

As will be appreciated from the foregoing description, all metal-to-metal contact, except through the spring 23, is prevented between the supporting brackets I3 and I6 and the frame member II supported thereby. The adjustment permitted between the brackets I3 and I6 by the bolts I5 and their surrounding apertures I4 assures proper vertical alignment of the two spring guides I8 and 22. In this connection, it should be noted that the difference between the diameter of the bolts I5 and the apertures I4 in the bracket I6 ls substantially the same as that between the diameters of the apertures I 9 and 2I in the brackets I6 and I3, respectively. The maximum adjustment or relative movement permitted between the two brackets I6 and I3 thus ls such that the rubber sleeve 29 will always be spaced at least the same distance from the walls of the aperture 2I as it is from the walls of the aperture I9, which distance is normally equal to the difference between the radii of the sleeve 29 and the aperture I9 when the parts have been properly adjusted to bring the guides I8 and 22 into initial vertical alignment. Universal movement, or movement in any direction, of the frame member I I relative to the supporting member I2 is, therefore, permitted at all times, and such movement is resisted and resiliently cushioned by the spring 23 and is primarily limited by the resilient sleeve 29.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim 1. A resilient mounting device interposed between a frame member and a supporting member therefor, comprising a spring guide secured to said frame member, a bracket secured to said supporting member, a second bracket having a spring f guide and adjustably mounted on said first bracket to enable proper alignment of said spring guides, a coil spring interposed between said guides to resiliently support said frame member, and a bolt secured to said frame member and extending in spaced relationship through said spring, said guides and said brackets.

2. A resilient mounting device interposed between a frame member and a supporting member therefor, comprising a bracket having one arm j secured to said supporting member and another arm with an aperture therethrough, a member adjustably secured to said bracket and having an aperture of smaller area than said rst aperture extending therethrough, a bolt secured to said frame member and extending through said apertures, a rubber sleeve on said bolt extending freely through said apertures and in spaced relation to the smaller one thereof, the maximum relative adjustment permitted between said apertured member and said bracket being the difference between the diameters of said apertures to prevent normal contact between said rubber sleeve and said bracket, and a coil spring surrounding said bolt in spaced relationship thereto and disposed between said apertured member and said frame member to resiliently support the latter thereon.

JESSE CLARK.

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