US1335379A

US1335379A - Adjustable chair

Info

Publication number: US1335379A
Application number: US40226A
Authority: US
Inventors: Charles A Lee
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-07-16
Filing date: 1915-07-16
Publication date: 1920-03-30
Anticipated expiration: 1937-03-30

Description

-C. A. LEE.

ADJUSTABLE. CHAIR. I

' APPLICATION FILED JULY 16. 1915.

1,335,379. I Patented M30, 1920.

2 SHEETS-SHEET l- &

INVENTOR ATTORNEYS un/4d) 25m.

C. A. LEE.

ADJUSTABLE CHAIR.

APPLICATION FILED JULY 16; 1915- 1,335,379. Patented Mar. 30, 1920.

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INVENTOR WITNESSES: I

ATTORNEYS nnrra earns PATENT OFFICE.

CHARLES A. LEE, OF ONEIDA, NEW YORK, ASSIGNOR TO WILBERT L. SMITH, OF

SYRACUSE, NEW YORK.

ADJUSTABLE CHAIR.

Specification of Letters Patent.

Patented Mar. 30, 1920.

Application filed July 16, 1915. Serial No. 40,226.

To all whom it may concern:

Be it known that I CHAnLEs A. LEE, a citizen of the United btates, and a resident of Oneida, in the county of Madison and State of New York, have invented. a certain new and useful Adjustable Chair, of which the following is a specification.

This invention relates to chairs having adjustable backs and seats, and has for its object a particularly simple and eificient construction whereb the'back and the seat can be adjusted to different relations and held in their adjusted positions, and the invention consists in the novel combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings, in which like characters designate corresponding parts in all the views.

Figure 1 is a sectional view through 'a chair showing the seat as in its normal position and the back as in its upright position, the back and seat being shown in side elevation.

Fig. 2 is a sectional view similar to Fig. 1, the section line passing through the back and the seat, showing the back and seat as adjusted to their extreme positions in one direction.

Fig. 3 is a fragmentary View similar to Fig. 2, showing the position of the seat and the locking means when the seat and back are in their normal position. i

This chair comprises, generally, a body, a

seat adj ustably mounted on the body, a back mounted on the body and adjustable into different angular relations relatively to the seat, the back having means coacting with the seat to change the position and the angular relation thereof during the angular adjustment of the back, and means for holding the back and the seat in their adjusted positions.

1 designates the body of the chair which may be of any desirable size, form and construction. 2 is the seat, and 8 is the back. The seat is fulcrumed at its front end on the body of the chair, and as here shown it is hinged at 1 on the upper edge of the front cross-bar 5 of the body of the chair.

The back 3 is provided with laterally extending pivots or trunnions 6 near its lower end which enter suitable hearings in the body 1, or in uprights 7 forming extensions of the rear legs 8 thereof.

The means on the back for coacting with the seat 2 to change the angular position of the seat about its axis 1 during the angular adjustment of the back, comprises an arm 9 extending below the axis 6 of the back and under the rear end of the seat 2 into position to support the rear end of the seat, the seat slidably resting on said arm 9 so that during the rearward movement of the back 3 about its axis 6, the arm 9 lifts the rear end of the seat. Usually, there are two arms 9 which are extensions of the side bars 10 of the back.

The pivots 6 are located above and in the rear of the seat when the seat is in its normal. position as seen in Fig. 1, and includes base plates 11 secured by screws or otherwise to the side bars 10 of the back. Each lifting arm 9 is formed with a forwardly extending hook or cam portion 12 which eX- tends under the rear end of the seat 2 and on which the rear end of the seat rests. During the rearward movement of the back 3, the end or toe 13 of the hook-shaped portion slides on the underside of the seat, as the back moves rearwardly and lifts the rear end of the seat, as shown in Fig. 2.

The back is moved rearwardly by the person sitting in the chair applying pressure thereto after withdrawing the locking memher, to be presently described.

The means for holding the back and the seat in their adjusted positions includes two elements or parts, one'carried by the seat and the other by the body and one being manually operable into and out of engagement with the other. The locking part carried by the seat is manually operable in the illustrated form of my invention, and consists of a sliding bolt 1 1 movable forwardly and rearwardly of the seat and guided in suitable guides 15, 16 during its sliding movement. The locking element or part carried by the body comprises a series of holes or sockets 1'? arranged one above the other in position to receive the rear end of the bolt 14:. Said sockets or holes are formed partly in a face plate 18 mounted on the rear cross-bar 18 of the chair, and partly in said cross-bar. Said bolt is lo cated centrally of the seat and the series of sockets centrally of the cross-bar 18. The plate 18 terminates at its upper end in a forwardly extending flange 19 constituting a stop shoulder for preventing overthrow of the bolt beyond the series of sockets 17 so toward its operative position by a spring 22 coiled about the same and bearing at one end against the guide lug 1G and at its other end against a shoulder 23 on the bolt. The bolt is operated to withdraw the same against the action of the spring ZZZ-by means of a rock shaft 2 1 j ournaled in suitable bearings 25 on the underside of the seat 2 and having a rock arm 26 at one end which is connected by a link 27 to the bolt 14, and having at its other end an upwardly extending handle 28 arranged within the reach of the sitter.

In operation, if the back 3 is in the position shown in Fig. 1, the occupant operates the bolt 14 by pulling rea'rwardly on the handle 28, thus withdrawing the bolt 14: from the lowermost socket 117. He then permits the weight of his body to move the back 3 of the chair rearwardly and as the back 3 of the chair moves rearwardly, it also lifts the rear end of the seat 2. When the desired position has been reached, the handle 28 is released and the bolt 1 1 will enter the socket 17 with which it is alined, the advance end of the bolt being pointed for facilitating the finding of the socket by the bolt.

\Vhen the back is in an inclined position, and a more upright position is desired, the bolt 14 is again operated and the occupant partially lifts his body off the back 3 of the chair so that his weight on the seat aeting on the arms 9 will move the back forwardly on its pivot until the desired angle is reached.

What I claim is 1. In a chair, the combination of a body, a seat fulcrumed at its front end on the body, a back adjustable to different angular posi tions relatively to the seat, the back having means coacting with the seat to raise and lower the rear end thereof during backward and forward adjustments of the back, and means for holding the back and the seat in their adjusted positions including a looking part carried by the seat, a part fixed to the body for holding the same at different elevations, and means carried by the seat for shifting one of said parts into and out of engagement with the other, the shifting means extending at one side of the seat within reach of the sitter, substantially as and for the purpose set forth 2. In a chair, the combination or a body, a seat fulcrumed at its front end on the body, a back adjustable to difierent angular positions relatively to the seat, the back having means coacting with the seat to raise and lower the rear end thereof during'backward and forward adjustments of the back, and means of holding the back and the seat in their adjusted positions, comprising two elements, one a series of sockets carried by the body and a stop shoulder at the top of said series, and the other a locking bolt carried by the seat and movable into the socket with which it is brought into alinement by the movement of the seat by the back, means for withdrawing one of said elements from the other, and means for limiting the withdrawal of such element to prevent the bolt and the stop shoulder clearing each other, gubstantially as and for the purpose speci- 3. In a chair, the combination of a body, a

seat fulcrumed at its front end on the body, a back pivoted to the body in the rear of and above the rear end of the seat, the back having a lifting arm extending below its pivot and under the rear end of the seat and with which the seat is slidably engaged, and manually operable means for holding the back and the seat in their adjusted positions including a member carried by the seat and an operating element for said member, carried by the seat andextending at one side of the seat within reach of the sitter, substantially as and for the purpose set forth.

a. In a chair, the combination of a body, a seat fulcrumed at its front end on the body, a back pivoted to the body in the rear of and above the rear end of the seat, the back having a lifting arm extending below its pivot and under the rear end of the seat and with which the seat is slidably engaged, and means for holding the back and the seat in their adjusted positions including a series of sockets carried by the body at the rear of the seat and arranged one above the other, and a manually operable bolt carried by the seat and having its engaging end arranged to be brought into alinement with anyone of the sockets during the angular adjustment of the back and the seat, substantially as and for the purpose described.

In testimony whereof I have hereunto signed my name at Oneida, in the county of Madison and State of New York, this 12th day of June, 1915.

CHARLES A. LEE.