US1855782A - Support for phonographic machines - Google Patents

Description

April 26, 1932. C B ULRjCH 1,855,782 SUPPORT FOR PHOPLQGRAPHIC MACHINES Filed Aug. 25, 1928 2 Sheets-Sheetl April ze, 1932. C. B. ULmCH 1,855,782

SUPPORT FOR PHONOGRAPHIC MACHINES Filed Aug. 25, 1928 2 Sheets-Sheet 2 Patented Apr. 26, 1932 UNITED STATES PATENT ortica CHARLES B. ULRICH, OF JAMESTOWN, NEW YORK, ASSIGNOR T .ART METAL CON- STRUCTION COMPANY, 0F JAMESTOWN, NEW YORK SUPPORT FOR PHONOGRAPHIC MACHINES Application led August 25, 1928.

This invention relates to supports for phonographic machines or apparatus and particularly to shock and vibration absorbing supports.

Heretofore it has been customary to mount plionographic machines on separate strands or supports so that these machines were supported from the iioor independently of desks or tables for the reason that if a phonographic machine were mounted upon the same desk with a typewriter, adding machine or other device, the vibrations from such devices were transmitted to the phonographic mechanism interfering with the proper recording or reproducing of the phonographic machine. It is very desirable for purposes of convenience and economy of space to mount a plionographic machine on the same table or desk with other machines or apparatus but heretofore, when for eX- ample, a phonographic reproducing machine was mounted on the same desk with a typewriter, the noise of the typewriter was transmitted through the table or desk to the sensitive reproducing mechanism of the phonographic machine with the result that such noises were magnified thereby and seriously interfered with the reproduction of the record, and furthermore the jar caused by the reverse movement of the carriage of a typewriter would in some instances be suflicient to cause the stylus of the phonographic machine to jump from one groove in the record to another groove, so that some of the subject matter on the record would either be duplicated or omitted.

The objects of this invention are to provide a support for a phonographic machine which absorbs both noises and vibrations as well as jars or shocks which may be transmitted to the support, so that these disturbances will not interfere with the proper 'operation of the phonographic machine; also to provide a support of this kind of simple and inexpensive construction and efficient in operation; also to improve the construction of supports of this kind in other respects hereinafter specified.

In the accompanying drawings:

Figs. 1 and 2, respectively, are front and Serial No. 302,081.

rear elevations of a phonographic machine 1mounted on a support embodying this invenlon; 1

Fig. 3 is a top plan view thereof partly in section, on an enlarged scale;

Fig. 4 is a sectional elevation of the support and a side view of the lower portion ofa phonographic machine Fig. 5 is a fragmentary sectional elevation of the support on line 5-5 of Fig. 3 on a further enlarged scale;

Fig. 6 is a sectional plan view thereof on a reduced scale, on line 6 6 of Fig. 4;

Fig. 7 is a fragmentary elevation of the upper portion of the support showing the man-` ner of securing a suspending link thereon; and

Fig. 8 is a fragmentary elevation of the suspension base of the support showing the connection'of the lower end of a link therewithi A represents a v phonographic machine which may be either ofthe reproducing or recording type and which may be of any suitable or desired construction, that shown being merely illustrated by way of example. The machine has a substantially flat base a which usually rests upon a suitable stand.

In the particular embodiment of my invention illustrated in the drawings, the supper includes a base member which may be in the form of a box-like structure, open at its top and having a bottom 10, front and rear walls 11 and 12 and end walls 13 and 14. This structure is provided at the opposite sides thereof with brackets 15 and a similar bracket 15 is provided on one of the end walls, namely end wall 13, in the construction shown.

These brackets may be of usual or suitable construction, those shown being substantially of U-shape having one fiange or leg 16 welded or otherwise secured to a side or end wall and having the other flange or leg 17 extending at a distance from the wall of the support and provided with an aperture 18, the lower edge of which is preferably bevelled or of knife edge form as indicated at 19. These brackets are adapted to support suitable suspension links 22, the upper hooked ends of which are adapted to enter into the apertures are mounted, are essential tothe successful operation of the support.

The lower ends of the links 22 are intended to support a swinging base 25 which, in the particular construction shown, is inthe form of a rectangular` frame :smaller indimension than the interior of the base and arranged within the same. Thisv swinging base includes a substantially horizontal inwardly extending flange 26 and ank upright peripheral flange 27. This upright flange is provided with apertures 30, the upper edges of which arefpreferably beveled orV knife-edged as indicatediat 31. The lower ends ofthe suspension links 22 are hook-shaped asindicated at 32.' and may pass through the apertures 30 and thus support the swinging base-frame 25.

By means' of' the construction described, the swinging frame or member' is supported by't'hree links,- so that a three point suspension results. By using a knife edge bearing fort'he links, the suspension ofl theA swinging frame isa delicate one, so thatfno lateral ars or shocks to which the base is subjected, will be transmittedv to the swingingframe nor to the phonographic machine supported thereon..

The construction thus far described is made of metal or other rigid materials, and will prevent the transmission ofv such jars or shocksto` the phonographic machine, which might' cause thelstylus thereof to'jump from one groove in the record'tov another, but this structure would not prevent the transmission of vibrations and sounds to the phonographic machine from the desk or table on which the support' may rest and which is indicated by Bin Fig. 4f. In orderto prevent such vibrations from being transmitted to the phonographic machine, a pair of flexible straps, tapes or cords 35 are provided in the construction shown, which extend around the frame or swinging member 25 and upon which the phonographic machine may rest. These straps may be made of any suitable flexible resilient material', such for example as canvas, rubber, or other nonrigid material which does not transmit vibrations. rIhe straps support the entire weight of the phonographic reprcducingor recording machine andA since these straps may easily be adjusted lengthwise of the swinging base or frame 25, they can readily be adapted to support any makes of phonographic machines.

It will be understood that the straps shown are merely one form of my invention since it is obvious that other means for preventing the transmission of vibrations and sounds t0 the phonographic machine may be used as desired.

For example, the suspension links 22 may be ifldesired, made ofnon-rigid or resilient material' which of themselves will prevent the transmissionof vibrations to the phonographic machine. The construction described, however, is simple and eflicient and has been found by actual experience to entirely overcomeall of the objections which have heretofore been found to placing a'l phonographic machine on the same table or support with a typewriter or other noise producing apparatus. The construction described also has the advantage that the phonographic machine willbe supported by a three point suspension and can readily be set upon the-supporting straps 35 without' necessitating any precautions to insure that'the machine will behor-izontally positioned upon the support.

By supportingv the phonographic machine on the horizontally extending straps or cords 35, it will beobvious thatvk an excellent cushioning effect will be produced because-of the elasticity of the straps and also because of the fact that heavy shoc rs or ars acting in a verticall direction on the support, will also cause the upright flanges 27 of the frame-25 to yield, and thus prevent thetransmissions ofl such shocks or vibrations to the phonographic machine. The straps are al'somade ofv material which does not conduct vibrations due to sounds.

In order to give the support a finished api pearance and to provide a guide for the movement of the sound carrying tube 36 of the phonographic machine, a cover frame is preferably provided which may beplaced upon the upper edges of the-upwardly extending walls or parts of' the base. This framein the construction shown is rectangular in shape, being provided with an outer upwardly extending flange 37 fitting closely around the upper edges of the upright walls of the support and a flange 38 extending inwardly from the upper edges of the flange 37.

The flanges 37 and 38 are preferably integral and formed so that the adjoining edges thereof are smooth and blunt and will not cut through or damage the sound carrying tube 36 of the machine.

l claim:

1. A support for a phonographic machine including a base member having upwardly extending parts, a swinging member adapted to support the phonographic machine, links for suspending said swinging member from said base member and said base member and said swinging member having bevelled edge bearings against which said links bear for freely supporting said swinging member from and relatively to said base member.

2. A support for a phonographic machine including a base member having upwardly extending parts, brackets secured on said parts and having knife edge bearings, a swinging frame disposed between said upwardly extending parts and upon which the phonographic machine rests, knife edge bearings on said frame, links extending between said brackets and said frame and having rounded portions engaging the respective bearings thereof to permit said frame to swing freely relatively to said base member.

CHARLES B. ULRICH.

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