US1301429A

US1301429A - Chair.

Info

Publication number: US1301429A
Application number: US27393719A
Authority: US
Inventors: Abraham Givner
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-01-30
Filing date: 1919-01-30
Publication date: 1919-04-22
Anticipated expiration: 1936-04-22

Description

A. GIVNER.

v CHAIR.

APPLICATION FILED .IAN. 30.19I9- I II @(NLAQQ Patented Apr. 22, 1919.

a sums-sum 2.

Jfl a E a I (Inca/M04 A. GIVNER.

CHAIR.

APPLICATION FILED JAN-30. |9|9' 1 fiULflQQ, Patented Apr. 22, 1919.

3 SHEETSSHEET 3.

, ABRAHAM GIVNER, 0F BALTIMORE, MARYLAND.

CHAIR.

Specification of Letters Patent. Patented Apr. 22, 19119.

Application filed January 30, 1919. Serial No. 273,937.

To all whom it may concern Be it known that I, ABRAHAM GIVNER, a citizen of the United States, residing at Baltimore city and State of Maryland, have invented certain new and useful Improvements in Chairs, of which the following is a specification.-

This invention relates to chairs of that kind which are provided with a seat and a back rest capable of being tilted so that the occupant may be supported in a partly reclining or recumbent position.

The invention has for its object to provide a novel and improved chair of the kind stated, the same consisting in a combination and arrangement of parts to be hereinafter described and claimed.

In order that the invention may be better understood, reference is had to the accompanying drawings forming a part of this specification.

In the drawings,

Figure 1 is a side elevattion of the chair;

Fig. 2 is a rear elevation thereof, and

Fig. 3 is an inverted plan view;

Fig. 4 is a side elevation showing another embodiment of the invention, and

Fig. 5 is an inverted plan view thereof with the legs removed;

Fig. 6 is a side elevation showing another modification of the invention;

Fig. 7 is a front elevation thereof, and

Fig. 8 is a plan view.

Referring specifically to the drawings, and more particularly to Figs. 1 to 3, 10 denotes the seat of the chair, and 11 a back rest having side bars 12 which are continued downwardly for some distance below the seat, as shown at 13. The lower ends of the side bars 13 are connected by a cross rod or bar 14. The seat 10 is hinged to the side bars 12 as shown at 15.

The forward portion of the seat 10, on each side, is hinged, as shown at 16, to a leg 17 which extends downward and rearwardly, and terminates beneath the cross bar 14 to support the rear portion of the chair. Where the legs 17 are connected to the seat, they are provided with branches 18 forming the front legs of the chair. Brace bars 19 con nect the leg portions 17 and 18.

The lower ends of the bars 13 and the legs 17 are connected by short link bars 20. The cross rod 14 provides a pivotal connection between the bars 13 and the link bars 20, and a cross rod 21 provides a pivotal conor pivotally connected to the leg members 17, the back rest 12 may be tilted rearward, which, at the same time lowers the seat, its rear end swinging downward. When this action takes place, the

toggle members

13 and 20 are flexed or thrown out of alinement,

the connecting rod 14 of the same being carried forward. This forward movement of the rod 14 is resisted by a helical spring 22, and also by springs 23 coiled around the rod 14 and held at one end by the rod 21, and with their other ends pressing against the members 13, the arrangement being simllar to a spring-hinge. The rearward movement of the back rest 12 is therefore spring-cushioned, and when the occupant of the chair again assumes an erect position, the back rest and the seat follow and are restored to their normal position.

The spring 22 is held between end caps 24 and 25, the former being anchored to the cross rod 14, as shown at 26, and the latter being connected to a screw stem 27 anchored to a round 28 connecting the legs 18, said stem being provided with a nut 29 for adjusting the tension of the spring.

The. toggle members 20 have lugs 20 which swing downward in the direction of the floor and reach the same before the spring 22, so that the latter is prevented from coming in contact with the floor, and the seat and back rest are also prevented from being tilted back too far.

In Figs. 4 and 5 is shown an application of the invention to a swiveled office chair. The seat 30 is supported by a base member 31 carried by a stem 32 which is swiveled and adjustably connected to a base 34 in the ordinary manner.

The seat 30 has a back rest 35 which is pivoted to the seat, as shown at 36, and 15 provided on each side with a downward lever-extension37 connected at its lower end by a link 38 to the lower member 39 of a pair of toggle members, the upper one of said members being shown at 40, and being pivotally connected to the seat, as shown at 41. The lower toggle member 39 is pivotally connected, as shown at 42 to a rearward and downward extension. or bracket arm 43 of the base 31. As shown in Fig. 5, the toggle mechanism is duplicated, there being one provided for each lever extension 37.

To the seat 30 is anchored one end of a coiled spring 44 having its other end connected to the toggle member 40, there being a spring provided for both of the latter.

Between the base 31 and the forward portion of the seat 30, are link connections 45, said links being pivoted at one end to a rod 46 mounted on the bottom of the seat, and at their other ends to the sides of the base as shown at 47.

From the base 31, on both sides thereof, extend horizontal seats 48, between which' viously described. When the back rest and the seat are tilted, the levers 37 swing forward, and through the links 38 the

togglemembers

39 and 40 are flexed, the connection50 between the latter being carried forward as before, and the spring 44 being placed under tension. The link connections 45 permit the seat to be tilted downward, this action 'being resisted by the springs 49.

Figs. -6 to 8 illustrate another embodiment of the invention. The chair here shown has a seat 51 and a back rest 52 which are rigidly connected. The

leg members

53 and 54 are arranged in the same manner as the leg or supporting members 17 v and 18 shown in Figs. 1 to 3, they being also connected by brace bars 55. The hinge connection be tween the leg assembly and the seat is shown Between the rear portion of the seat 51 and the bottom of the leg members 53 are interposed

toggle members

57 and 58, the form-er being pivoted to the seat, as shown at 59 and the latter to the legs as shown at 60.

toggle members

57 and 58 is a rod 61 and the

pivots

59 and 60 are also rods. As shown in Fig. 7, there is a toggle mechanism at each side of the chair, the pivot rods being common to both.

' A spring 62, in all respects similar in construction and function to the spring 22 hereinbefore described, is provided. The toggle mechanism is flexed against the tension of this spring when the seat 51 is tilted downward, but before the seat can be tilted the toggle members must be swung out of alinement, which is done by a lever 63 connected by links 64 to the toggle members 58, the lever being in the form of a yoke having its The pivotal connection between thein the presence of branches pivoted to a round 65 connecting the brace bars 55. With. the exception that the toggle mechanism must first be flexed by some means independent of the seat or the back rest, the last described chair operates in the same manner as the chair shown in Figs. 1 to 3.

I claim:

1. A chair comprising a seat, a support, a pivotal connection between the support and one end of the seat to permit tilting of the seat, a pair of toggle bars extending between the support and the other end of the seat, said bars being normally in alinement and adapted to be thrown out of alinement when the seat is tilted, and resilient means resisting the last -mentioned movement of the toggle bars.

2. A chair comprising a seat, a back rest having a pivotal connection with the seat and provided with downward extension below the latter, a support for the seat to which the latter is'pivoted at its forward end to permit tilting, said support having a rearward extension terminating below the aforesaid back rest extension, a link connection between said extensions, the link being normally in alinement with the backrest extension and moving out of alinement when the back rest and the sea-t are tilted and resilient means resisting the last-mentioned movement.

3. A chair comprising a seat, a support, a pivotal connection between the support and one end of the seat to permit til-ting of. the seat, said support having a rearward extension terminating below the rear portion of the seat, a toggle connection between the extension and the last-mentioned portion of the seat, means connected to the toggle for flexing the same, and resilient means resisting flexure of the toggle.

4. A chair comprising a seat, a support, a pivotal connection between the support and one end of the seat to permit tiltin of the seat, said support having a rearwar extension terminating below the rear portion of the seat, a toggle connection between the extension and the last-mentioned portion of the seat, a pivoted back rest for the seat, a connection between the back rest and the toggle for flexing the latter, and resilient means resisting flexure of the toggle.

In testimony whereof I aflix my signature two witnesses.

- ABRAHAM GIVN'ER.

lVitnesses:

E. WALTON BREWINGTON, HOWARD D. ADAMS.