US173772A - Improvement in piano-stools - Google Patents

Description

PATENT: ori-Ica Elanna e. Davis, on Bosiroitf,MAssAcUsETTsQ IMPROVEMENT vIN PIANO-.STOOLSt Specification forming part of Letters Patent No. 173,772, dated May 3, 1875.

' for transportation, and it consists in the construction of' parts, when combined in a pianostool, as hereinafter described.

Figure 1 is a vertical central section of a pianostool constructed according to my invention. Fig. 2is a horizontal section through the saine at the point indicated by dotted lines X Y. Fig. 3 isla modification of the same. Fig. 4 is also a modification of the means for connecting lthe legs to thevmetal hub.

4 A are the legs of a piano-stool, being -con-v nected to the metal hub B by dovetailed tenons U, fitting into corresponding recesses formed in the metal hub B, extending from the bottom of' the hub to near the top, where they terminate'at the bottom ofthe flange C, the legs A being driven up into the hub B until their ends strike the iiange (Liso that when the stool is used the weight upon the legs will tend'to keep them firm in place.,

Inthe recesses I construct fastenings to i connect legs A to the hub B, Vconsisting of pins V, connecting` with .the hub B by means of Webs, as shown in Figd. This makes a very simple and strong fastening.

After the legs are driven into place, as shown in Fig. 1, I fasten a plate, F, underneath with screWsR passing intoeach leg.` I then insertthe round tenon E on thebottom of the post D into the hole through the center ofthe metal hub B. This tenon passes through the hub B and plate F -a short distance, itsA end having a hole to receive the wood-screw H, whosel head is cast intothe metal ornament Gr, which is provided with four or six -square shoulders, I', by which a wrench may Enrnarlyee, 1876; 'application flied v be applied to the same in order to draw the base ot' the post D down on the flange C very firmly. A slight rim projecting upward from part of' the post and the dange. The top of the post is provided with the screw-nut or socket, as usual, to receive the adjusting screw-shaft K, which is provided with a bearing-plate, L, permanently connected to-` the shaft K, which has an extension, I, passing end being provided with screw-threadtting the base T by screws P.4

This plate L is provided with four or six square shoulders, M, to which a Wrench may be applied to hold the adjusting-shaft K from the seat W. The plate Lis provided with a small screw, s, which passes through it into the base board -or frame T, to prevent the the actof raising the same when desired, in the usual manner.

It will be seen that if a Wrench lbe applied -to the square shoulders I on the ornament G,

sufficient forceto draw ,the base' of thepost D into the recess in the top of' the iiange C, to

seat on the top of the flange C, which is cast `in one piece with the metal hub E, which has recesses for three or four legs, A, as most desirable. r

I am well aware that Letters Patent were granted to Joshua Briggs December l0, 1867, for improvements in piano-stools; therefore, I broadly4 disclaim said invention.

1. The adjusting screw-shaft K, having the extension I passing up into the frame T, where itis provided with a screw-thread to fit the stationary nut N, in combination with the bearing-plate L, having square faces or shoulders M, for the purpose of connecting or disconnecting the seat and adthe liange C covers the joint between this` up through the same and up through the bottom or base T of the seat W, its upper into the nut N,l which is secured to the top of i turning, when desirable to apply or remove v seat from unscrewing, when it is revolved in it may be turned up against the plate F With make it very rigidly connected at its bearing- Having thus described my invention, what 2. The metal hub'B, mode with Athe top .mlge C, recesses and pins V, in combination with the bottom plate F, screw H. and ornament G, having square faces o1" shoulders I',

` whereby the legs A are held in the recesses,

substantially n the manner described, as and for the purposes set forth.

y ELMER G. DAVIS.

Witnesses: Y

SYLVENS WALKER, H. S. TALBOT;

Images