US848465A - Chair and the like. - Google Patents

Description

4o center by an axis i.

' UNITED STATES PATE T CEEICE.

CHRISTIAN HEINRICH HOMEYER, OF' BREMEN, GERMANY, ASSIGNOR 'TO CHRISTOPH .HEIMSA a SCHN GESELLSCHAFT MIT RESCHRNKTER HAETUNC, or BERLIN, GERMANY.

. CHAIR 'AND1-HE LIKE..

Specification of Letters Patent.

Patented March 26,1907'. y

ZZ whom, it may concern.:

z .,Beit known that I, CHRISTIAN HEINRICH HOMEYER, a Subj ect of the Emperor ot Gerffmany, residing at Bremen, in the German Empire, have Invented new and usefulI Iniproveinents in Chairs and the Like, of which the following is a s eciiication.

My invention re atesto an impro-ved chair or Stool with vertically-adjustable seat of io the class described in German `Patent No.

164,699; The seat ofthe chair disclosed in this patent rests on crossed levers, which by means otracks can be set in' any-desired' position on raising the seat, while on lowering the seat the racks which present lateral' V llets slide over stationary pins, whereby the teethpf the racks are prevented from engaging with the catch-bar.

The present invention consists in an im- 2o provenient of the'nieans for setting the seat,

whereby the latter can be set at the desired height without the use ot sprin gs such as are employed in the said patented invention.

The new invention is, illustrated in the 2-5 .accompanying drawings, in which- Figure 1 is a front elevation; Fig. 2, a side elevation, and Fig. 3 a plan of the trame which supports the seat. Fig. 4 shows one of the racks in side and edge views, Fig. 5

3o shows in side elevation and plan one of the lower plates of the frame. Fig. 6 is a side elevation of a chair Iitted with the new device drawn to a reduced scale.

Below the seat of the Chair a rearwardly- 3 5 slotted angle-iron g is secured at each side.

These angle-irons g are in connection with a kind of trestle or-franie, consisting of four levers 71/ 71.1, each two of which lie crosswise. All the ff'our levers 71y h, are connected at the y The two levers 71 are joined at .one vend b vanaxis j and travel along the'slots in the angle-irons g. Sinularly, the two'levers 711 arejoined at one end lby an axis y1. chair parallel with the angle-irons a 'two In tlieundei l'ianie of the platesf are secured, Slotted similarly to the angle-irons g. The ends of the .two levers h1, which are connected by the axis y1, travel Valong the slots in theplatesf. The',` other ends of the levers 7l and lh1 are held at they front ends of the angle-irons g'and -tlie platesV 7 by rods Z Z1, respectively, which Connect the two angle-irons and. the two plates. j

Inorder to secure the seat in any desired position, racks a are'provided at each side otl thetrestle. These racks turn on the center axis and are each provided with a pin l),

While a pawl c is pivoted at d to each ot'. the

bottom .plates f of the trestle. The tip of the pawls c rests on the bar e, which extends across the trestle and serves .to catch in the teeth of the racks a.

It the seat is raised, for instance, ont of the position shown in Fig. 6 into its highest position, the pins b bear against the under side of the pawls c and lifting them pass upward between them and the bar e and lie -upon the pawls after the latter have dropped back into their initial position, resting upon the bar e again. The seat can now be closed down, since the pins b of the racks a slide along the top of the pawls c, so that the teeth of the racks a cannot engage with the bar e. When the seat is in its shut-down position, the pins b of the racks a drop over the suitably-diniensioned heel of the pawls c and come lagain below the latter.l The seat can then be at once elevated again when required.

Having thus described my invention, what I claim as new, and desire to secure byLetters Patent, is-

In a Chair, the combination with a seat portion andan under frame, of means for elevating and lowering the seat portion, said means conipriSing't-wo pairs of obliquely-extending levers, one of the levers of each pair extending in an opposite direction with respect to the other lever 'of each pair, a bar for pivotally connecting the levers at their centers, means for pivot-ally connecting the upper `end of one of thelevers oteach pair to the y front of the seat portion, means for pivot ally` connecting the end of the other lever .of each pair to the front of the under frame,nieans for sli'tlably connecting one end of the levers otl` each pair to the rear ot the seat portion, means for slidably connecting: the levers ot each pairlto therear of .the under' traine, r.

pair of ratchets depending from said bai' and l In testimony whereof .I have hereunto set each provided with 'a laterally-extending pin my hand in the presence of two subscribing 1o ptthe lowr eind, adbar seoured to he under witnesses.

rame an a e t'e to le en a e b said i 5 ratohets, and gawls carried gb; theyunder CHRVISTIM HEINRICH HOMEYER frame and resting upon the bar secured-"tol Witnesses: the'under-irame and constituting tracks for C.'DIEDERIOH,' the'pins ofthe pawls. v Y

FREDERIC'H HOYERMANN.

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