US636745A - Chair with automatically-changing seat. - Google Patents

Description

Patented Nov. [4, I899.

F. BEIL.

CHAIRWITH AUTOMATICALLY CHANGING SEAT.

(Application filed June 27, 1899.)

(No Model.)

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A 770mm Y5 rTE STATES FRANZ BEIL, OF WARNSDORF, AUSTRIA-HUNGARY.

CHAIR WITH AUTOMATICALLY-CHANGING SEAT.

SPECIFICATION forming part of Letters Patent No. 636,745, dated November 14:, 1899.

Application filed June 27, 1899 Serial No. 722,068. (No model.)

To aZZ whom it may concern.-

Be it known that I, FRANZ BEIL, residing at Warnsdorf, Bohemia, Austria-Hungary, have invented an Improvement in Chairs with Automatically-Changing Seats, of which the following is a specification.

This invention relates to a chair with an' automatically-changing seating-surface and is distinguished by an endless band which is set in motion by means of a transporting apparatus actuated by the weight of the sitter extending two spiral springs in such a manner that when the chair is vacated by the person who has been seated thereon the seating-surface will be automatically changed.

The chairs hitherto used and provided with but a single seating-surface have a great drawback frequently noticeable not only from an esthetic but also from a hygienic point of View, as they attract heat, &c. from the body, which is unpleasant to the person who next makes use of the chair. This drawback is particularly noticeable in public places where the seats are used by different persons in quick succession-for instance, in hair-dressers shops, banks, and the like.

The object of this invention is to remedy this evil, which is done in the simplest and most practical manner, as even when the chair is constantly in use by a number of persons in succession the seating-surface previously used can become completely cool before it is in position for use again, and that on which the following person sits is perfectly fresh.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a central vertical section of the chair, and Fig. 2 is a detail.

The chair a, which may be furnished with a back or otherwise, stands on four legs I), made of bent wood or bent iron, the inner surfaces of which serve as running-surfaces for friction-rollers c. A frame d, jammed in between the legs, acts as a bearing for these rollers and for a larger roller or cylinder 6 f g h. The last named is loosely seated on a shaft 1' and serves as a transporting-cylinder.

For this purpose it is furnished with teeth or pins which engage in an endless band 70, that serves as the seating-surface and impels it at the proper moment. A pawl arrangement suitably arranged restricts the transportingcylinder h, and thereby the seating-surface also, to a unilateral motion. The frame d is furnished on the sides with two slots 1, in which two cross-stays m, firmly attached to the chair-f ram e, can be guided. These crossstays m are in their turn connected together by means of two rods 11., to each of which a spiral spring p is attached, their other ends being connected by means of a cross-bar 0 with the movable frame (1.

The action of the chair is as follows: As soon as a person sits on the seating-surface the latter runs down to a certain extent as far as the cross-stays m. As the seating-sun face and the transporting apparatus are connected together by means of the frame (1, it is obvious that the whole mechanism descends at the same time, whereby the springs 9, which are firmly connected with the crossrods, are put under tension. Pawls q, arranged on the side surfaces of the transporting-cylinder h, prevent at the same time any rotation of the cylinder. If now the person who is seated vacates the chair, the seatingsurface and the movable frame dare returned to their former positions by the power of the springs under tension, a tooth-wheel 8, carried by the movable frame, gearing with a rack r, fixed to the chair-frame, and thus setting the transporting-cylinder h in rotation through the medium of a gearing arrangement, the transporting-cylinder in turn engaging with its teeth or pins in the endless band To, that formsthe seating-surface, and impelling it farther to the extent of one seating-surface.

Having now.particularly described and ascertained the nature of the said invention and in what manner the same is to be performed, I declare that what I claim is- 1. In combination with the supportingframe, the seat comprising an endless band and means for causing said band to travel, said means being placed in operating condition when a person is seated and operating when relieved of the Weight of the person, substantially as described.

2. In combination with the supportingframe, the seat comprising an endless band and means for causing said band to travel comprising the spring placed under tension by the Weight of the person and driving con- I ncction between the spring and band, said Y [L. s] RICHARD HIRT.

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