US1724892A - Spring support for furniture - Google Patents

Description

Aug. 20, 1929. H. AsHr-:R

Y SPRING SUPPORT FOR FURNITURE Filed June '7, 1927 \\\\\\-lllll///,

Patented Aug. 20, 1929.

PATENT OFFICE.

HARRY ASHER, F LONDON, ENGLAND.

srRING SUPPORT FOR FURNITURE.

Application led .Tune 7, 1.927, Serial No. 187,143, and in Great Britain January 27, 1927.

This invention refers to improvements in spring supports for'furniture.

The invention has more particular reference to spring supports of the kind comprising two spring-controlled telescopic members one of which is adapted for screwing or fixing to the leg of the article and the other to rest directly on the floor or to carry a resilient pad or wheel.

The invention has for its primary object to provide a spring-support or castor of improved and simplified construction which can be applied to a chair or other article of furniture even by an unskilled person and alsO without the use of a screw-driver or any other tool than that required to bore a small hole in the bottom of the leg of the article.

Now according to the present invention I provide a spring support for furniture comprising a pair of substantially cupshaped telescopic members having an intermediate spring tending to keep the parts extended, one of said members being provided with a xed screw for engagement with the leg of a chair or the like.

In order that the present invention may be clearly understood and more readily carried into effect it is hereinafter described with reference to the accompanying drawings in which Figure 1 is a side elevation of a spring castor constructed in accordance with the present invention and shown applied to the lower portion of the leg of a chair or other article of furniture.

Figure 2 is a sectional side elevation of the said castor.

Figure 3 is al plan view of the said castor.

Figure 4 is a plan view of the slightly modified form of castor, the central screw being removed so as to show the central fixing hole therefor; and

Figures 5 and 6 are views illustrating certain modifications herein referred to.

As shown and in carrying the present invention into effect the improved spring castor comprises two telescopic members a, Z) of metal, which are normally kept extended by means of a helical steel spring c of suitable strength. The members a, b may be of any convenient construction or design. In the particular embodiment of the invention shown in the drawings the upper member a is in the form of an inverted cap having a slightly dished or flat end a and an outwardly flared or flanged lower edge a2. The lower member b which in the present embodiment is the larger or containing member for the part a is of bulbous shape having curved sides and bottom and an inturned fianged portion b adapted to co-operate with the aforesaid flared or flanged lower edge a2 of the part a. The flange a2 is suitably formed during the manufacture, and after the parts have been assembled with the spring c in position, the flange b is formed. The lower member may if desired be provided with means for keeping the spring in the central position such for instance, as a circular rib or indentation.

In order that the castor may be readily screwed or fixed to the leg of a chair or the like the member a is provided with a central screw e which is attached in any suitable manner to the closed end a thereof. In the construction illustrated the squared end f of the screw e is passed through a square hole g in the end a of the part a and then rivetted over as shown in Figure 2 of the drawings.

For the purpose of still further assisting the operation of fixing or screwing the castor in place the two parts a and b may be provided with means such as the interengaging projections h and internal grooves h as shown in Figures l and 3 of the drawings. rIhus a better hand grip is provided than if only the one part a adjacent to the end of the chair or other leg, were fixed as regards rotation to the screw e. The two parts may be prevented from rotating by other means as will be readily understood. For instance, the one part a may be provided with one or more vertical grooves z' whilst the part b may be provided with one or more aligned indentations y' formed by a centre punch or other tool or with one or more vertical grooves.

It will be manifest that in some cases the disposition of the parts a, b may be reversed that is, the upper member may be the larger so as to contain or receive the lower member. Also instead of employing a metal spring c to keep the parts extended and to give the required resilience to the castor I may employ a block or cushion of indiarubber.

The lower member, instead of making direct contact with the floor may be provided with a cap or pad of rubber or other resilient ment with the upper member and means on said members to hold them against relative rotation and means limiting the sliding movement of the lower member away from the upper member, and resilient means in said support yieldably resisting sliding movement of the members towards each Other.

In testimony whereof I have hereunto signed my name.

HARRY ASHER.

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