US664897A - Folding chair. - Google Patents

Description

No. 664,897. Patented Ian. I, [90L A. BUTT.

FOLDING CHAIR.

(Application filed Oct. 23, 1899.)

2 Sheets-Sheet I.

(No Model.)

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No. 664,897. Patented Jan. I, 190i. A. non. FOLDING GHAiB.

(Appficatian filed Oct. 93, 1899.)

2 Sheets-Shut 2,

(No Model.)

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UNtTnn STATES PATENT OFFICE.

ALBERT ROTT, OF FREIHEIT, GERMANY.

FOLDING CHAIR.

SPECIFICATION forming part of Letters Patent No. 664,897, dated January 1, 1901.

Application filed October 23, 1899. Serial No. 734,569. (No model.)

To (all whmn it may concern.-

Be it known that I, ALBERT ROTT, master joiner, a subject of the King of Prussia, German Emperor, residing at Freiheit, near Osterode, Germany, have invented new and useful Improvements in Three-Legged Folding Chairs, of which the following is a specification.

The present invention relates to an improved three-legged folding chair which is of utility where limited space necessitates the folding up or storing away of articles of furniture when such articles are not required for immediate use.

This invention relates to certain new and useful improvements in such folding chairs; and it has forits object to simplify and cheapen the construction and to render more efficient, durable,and serviceable in operation this class of articles.

To these ends and to such others as the in vention may pertain the same consists in the peculiar combinations and in the novel constructions, arrangements, and adaptation of parts, all as more fully hereinafter described, shown in the accompanying drawings, and set out in the appended claims.

My improved folding chair is rendered fit for use by turning forward one leg, thereby rigidly supporting the chair without necessitating the employment of special fixing means.

In the accompanying drawings, Figure 1 shows a side elevation of myimproved chair ready for use. Fig. 2 is an inverted plan of the chair as shown in Fig. 1. Fig. 3 is a rear elevation of the chair when folded up. Fig. i is a side elevation of Fig. 3. Fig. 5 shows the spiral spring for operating the levers.

The folding chair consists in the usual manner of the back, the seat, and a third movable leg attached to the back. The two side parts a b of the back serve at the same time for constituting two of the legs of the chair. These two side parts a b are connected together by means of four cross-bars c (1 cf, of which the two top ones constitute the frame for the back-rest. The back may be upholstered, caned, or fitted in any suitable manner, or it may be fitted, as shown in the drawings, with vertical rails g. The cross-bar 6 serves for attaching the seat 2' by means of extensions 0 of the levers n.

hinges h. This cross-bar e, in combination with the cross-bar f, at the same time serves as a support for the rotatable leg 70, said leg It being pivoted in corresponding holes in the two cross-bars e f.

The lower side of the seat t' is fitted with the device for holding the leg is in operative position. On a ledge Z, transversely secured to the lower side of the seat 71, levers n are rotat-ably fitted around screw-pi votsm. These levers n are shaped at their free extremities so that extensions 0 are formed. On the ledge Z a plate 10, of metal, is fastened, extending beyond the inner edge of said ledge Z and affording on the ledge a stop or rest for the two A further and essential purpose of this plate p will be pointed out later on. ;By means of spiral springs or the like the two levers n will constantly show a tendency to return to their position of rest on the back of the plate 10.

The leg or support It, the rear part (1 of which is shaped so as to assume the form of an ordinary third leg of the chair, as indicated in Fig. 3, is fitted at the front with an extension 0", a slots being provided in same a short distance from the top edge. (See Fig. 3.)

In unfolding the chair the part, q of the support or leg in is pulled out, (it is a matter of indifference from which side,) the seat being raised thereby, as the extremity of the extension r travels along its under frame. On coming to bear against one of the levers p the pressure exerted in turning the support A; presses the lever 71 back, the influence of its spiral spring not being sufficient to counteract same, until the extremity of the lever is reached, when the extension 7' will press against the recessed part at the extremity of the second lever n. The first lever 'n then returns to its original position, owing to the influence of its spring, whereby its extension 0, like the extension 0 of the second lever n, bears against the extremity of the support 10, thus locking same in position. The slots in the support is then occupied by the projecting part of the plate p, which locks the seat iin its position, so that it can neither be raised nor lowered. The tongue formed by the slot sis of reduced length, so as not to come in contact with the levers it, but sim; ply to travel inside the ledge Z and within such travel, so as to pass beneath the plate 19, projecting from the ledge Z, for the purpose above indicated.

The two free extremities of the levers n may be connected by a suitable length of chain 25 to prevent opening them out too far.

In folding the chair it is simply necessary to retract one or both of the levers n and to turn the support 70 in either direction, whereupon the seat 7) will drop by gravity.

Having now described my invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. In a folding chair the combination of the back-frame having cross-bars, a pair of legs constituting the vertical rails of the aforesaid back-frame, a third leg pivoted vertically in two of the cross-bars of the backframe, a seat hinged to the latter, aledge on the under side of the seat, a plate secured to the aforesaid ledge, said plate projecting inwardly beyond the ledge, a pair of spring-influenced levers mounted on the ledge to insure the position of the hinged third leg, and an extension of the third leg fitted with a slot adapted to be engaged by the projecting portion of the aforesaid plate, substantially as described and shown and for the purposes set forth.

2. In combination with the back-frame of to be raised by the shorter end of the sup- 1,

port on turning the latter, a ledge transversely secured to the under side of the seat,

a pair of spring-influenced levers pivoted to the aforesaid ledge, a plate centrally attached thereto projecting slightlyinward, said plate preventing the levers from further turning inward when in alinement by forming an abutment for their free extremities, a slot in the shorter end of the pivoted third leg adapted to be engaged by theinwardly-projecting portion of the plate on the transverse ledge at the under side of the seat to prevent the seat from being raised or lowered, saidshorter end of the pivoted third leg adapted to be embraced by the free extremities of the springinfiuenced levers, substantially as and for the purposes set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

WOLDEMAR HAUPT, HENRY HASPER.

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