US141208A

US141208A - Improvement in adjustable stools

Info

Publication number: US141208A
Authority: US
Publication date: 1873-07-29
Anticipated expiration: 1890-07-29

Description

A. D0 LL.

AdjustahlaStools Patented- July 29,1873.

mfnesses.

UNITED STATES PATENT CEEICE.

ARNOLD DOLL, OF CLEVELAND, OHIO.

IMPROVEMENT vIN ADJUSTABLE STOOLS.

Specification forming part of Letters Patent No. 141,208, dated July 29, 1873; application filed February 3, 1873.

To all whom it may concern:

Be it known that I, ARNOLD DOLL, of Cleveland, in the county ot' Cuyahoga and State of Ohio, have invented a certain new and lmproved Adjustable Stool 5' and do hereby declare that the following is afnll, clear, and complete description thereof, reference being had to the accompanying drawings making part of the same.

Figure l. is a side view of the stool. 2 is a vertical transverse section.

Like letters of reference refer to like parts in the several views.

This invention has for its object the construction of a stool so that the seat thereof can be raised or lowered, in order to accommodate it to the height and convenience ot' those using it.

The construction and manner of operating said stool are as follows ln the drawing, A represents the base or legs of the stool, from which projects upward a hollow standard, B. In said standard is titted, so as to slide therein, a tube, O, Fig. 2, to the upper end of which is secured the seat D of the stool. E, Fig. 2., is a circular plate itted loosely to the outside of the tube, and which slides thereon. A collar, F, secured to the plate serves as a guide, and prevents the plate from cramping on the tube. Pivoted in the tube O is a pawl, G, which is so arranged as to engage a rack, H. Said rack is secured to the side ot' the standard, and, in order that the pawl may engage therewith, a slot is made in the side of the tube, in which the pawl is pivoted, so that the teethof the rack will project therein so far as the inside ot' the tube, as shown in Fig. 2. Said pawl is attached to the plate E by means of a link, I, and whereby it is disengaged from the rack, for elevating and lowering the seat ofthe stool, as follows:

The seat of the stool, as represented in the drawing, is lowered so far as can be. In or- Fig.

der to raise it, the two hands are laid on the seat, one on each side, and in such way as to bring the thumbs on the cushion and the lingers under the seat and upon the plate. Now, on lifting it' upward, the seat will thereby be raised,in consequence of the withdrawal of the tube from the standard, the pawl at the same time slipping over the rack, and which holds the seat, when raised, by its engagement therewith on the removal of the hands. The weight ofthe seat, by its connection with the pawl, throws its pointinto the'rack, as shown, by pressing dowward its opposite end, thereby causing the pawl to assume a more direct transverse position, and thus dog'gin g the tube in the standard and preventing it from slipping down. To lower the seat, the hands are applied thereto `as above described; but instead ot lifting on the seat, as aforesaid for raising it, the plate is simply pressed against the under side, the result of which will be to draw on the rear end ot' the pawl and disengage its point from the rack, thereby leaving the tubey free to slide down into the standard.

To assist in holding the pawl lirmly in position, and to canse it to act immediately in its engagement with the. rack, is the purpose ot' the spring J, which, as will be seen, is attached tothe rear end ot' the pawl, the tension of which keeps it in engagement with the ruck, as shown.

The special advantage of a seat being raised in the manner as above described over the usual method, viz., a screw, is, that the seat cannot revolve, but remains lirm, which, when used as a music-stool, is a matter of great importance, as the player needs to be securely and rmly seated, in order to execute well, but which he cannot be. when the seat is screwed into the standard, for the strain of the body upon the seat causes it to turn more or less, and thereby renders the stool insecure and unsteady.

What I claim as my invention, and desire to secure by Letters Patent, is-

The pawl G, rack H, link I, plate E, and spring J, as arranged in combination with the tube O, standard B, and seat D, in the manner substantially as and for the purpose set forth.

' ARNOLD DOLL. Witnesses:

J. H. BURRiDGE, A. F. CORNELL.