US2285112A

US2285112A - Adjustable chair

Info

Publication number: US2285112A
Application number: US284264A
Authority: US
Inventors: John M Dorton
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-07-13
Filing date: 1939-07-13
Publication date: 1942-06-02
Anticipated expiration: 1959-06-02

Description

June 2, 1942. J, M, Dom-0N 2,285,112

ADJUSTABLE CHAIR John Mloron,

:inventor:

Patented .lune 2,1942 v 'I iihli'ih STATES FATNT `OFFICE'.

ADJUSTABLE CHAIR John M. Dorton, Bonner Springs, Kans.

l Application July 13, 1939, Serial No. 284,264

1 Claim.4 (Cl. 155-116) My invention relates to an adjustable chair and one object of the invention is the provision of a chair of this character in which the seat may be adjusted forward orbackward and the back may be adjusted upward or downward through pressure exerted by the occupant of the chair.

A further object of the invention is the'provision of means for securing the seat and the back of the chair in any of their adjusted positions.

Another object is to connect the seat and the back of the chair in such manner that as the back is let down to a reclining position the seat is moved forward to keep the chair balanced so that it will not tip backward under the weight of the occupant.

Other objects will hereinafter appear, and in order that the invention may be fully understood reference will now be to the accompanying drawings, in which- Fig. 1 is a side elevation of the chair with the upholstery and some of the other parts removed, and the head-rest adjusted to its lowermostV position in full lines and adjusted to its uppermost or idle position in dotted lines.

Fig. 2 is a plan View of the chair with the headrest and some of the other parts removed.

Fig. 3 is a longitudinal sectional View of the chair on line 3 3 of Fig. 2, with the head-rest added and adjusted to its uppermost position in full lines and to an intermediate position in dotted lines.

Fig. 4 is an enlarged section on line 4 4 of Fig. 1 of one of a pair of hinges which connect the back to the seat frame of the chair.

Fig. 5 is an enlarged cross section on line 5 of Fig. 1 showing one of a pair of guideways and one of a pair of rollers for adjusting the chair back to different inclinations when the chair seat is moved forward or backward.

In carrying out my invention I provide a pair of supporting members 2 each of which is preferably formed from-one piece of tubing and comprises front and

rear legs

4 and 6, respectively, and an arm rest 8 uniting said legs. The arm rests 8 arev upholstered with soft rubber or other suitable material 9 and the legs are mounted upon casters I@ which are preferably swiveled upon the lower ends of the legs so that they may readily turn in diiferent directions. The supporting members 2 are united at their front and rear portions with transverse members I2 and each supporting member is provided with a rail I4 fixed to the-.associated front and

rear legs

4 and 6, respectively.

A seat frame I6 located between the supporting members 2 Vis mounted for forward and backward movements upon the rails I4. Each side of the seat frame I6 comprises a lower member I8 bent upward at its rear end and connected to an upper member 20 which is curved downward at its forward Yend and fixed to the forward end of the member I8. The lower seat members I8 are united at their front and rear ends with transverse members 22 and provided near their rear ends with rollers-24 adapted to traverse the respective rails I4; which latter are equipped near their forward ends with rollers'26 upon which the respective seat members I8 are adapted to travel so that the seat framev I6 may be moved forward or backward with but little effort on the part of the occupant of the chair. The lower seat members I8 have spaced rods IBa connected thereto to support lthe lower portion of a cushioned frame hereinafter described.

The seat frame I6 is held in any of its ad justed positions with either one of a pair of racks 28 and a detent 30. Racks 28 are fixed upon the respective lower seat members I8 where they may be engaged by the detent 3D which is fixed to a hand vlever 32 secured to a shaft 34 mounted in bearings 35 iixed to the under sides of the respective rails I4. The hand lever 32 is applicable to either end of the shaft 34 for the convenience of right or left handed users, so in orderthat it may be readily removed from one end of shaft 34 and applied to the other end thereof the lower end of the hand lever is split and equipped with a bolt 38 which may be tightened to firmly secure the hand lever upon the shaft. The detent 36 is yieldably engaged with the associated rack 28 by a coil spring 31 connected at one end to one of the rails I4 and connected at its other end to a collar 39 fixed to shaft 34.

The back frame 40 of the chair is preferably made of tubular stock and comprises two sides united at their upper and lower ends with transverse members 42 and each side comprises front and

rear members

44 and 46, respectively, the former of which is bent rearwardly at its upper end and fixed to the upper end of the latter which is bent forward at its lower end and fixed to the lower portion of the front member 44. The rear members 46 have transverse rods 46a connected thereto to coact with the rods |80, in supporting the cushioned frame above referred to.

The front members 44 of the back frame 4i] are connected at their lower ends to the rear ends of the upper members 20 of the seat frame I6 with respective hinges 48 so that the back frame 4i) may be raised or lowered to diiferent positions. Each hinge 48 comprises a pair of

members

52 and 50 fixed to the adjacent ends of the seat frame members 20 and the back frame members 44, respectively, and operably connected with a transverse pin or screw 53. Each hinge member 52 is recessed to receive a felt washer 56 which may be saturated with a suitable lubricant to facilitate the operation of the` respective hinges and eliminate squeaks or other noises.

Inclination of the back frame 40 to Various positions is automatically controlled on forward or backward movement of the seat frame I6 with a pair of rollers 58 and a pair of guideways 6U. The rollers 58 are mounted at the upper reduced portions of a pair of upwardly extending supporting elements 62 consisting preferably of sheet metal and rigidly secured at their enlarged lower ends with suitable means such as screws 64 to the respective rails I4. Each guideway B extends downward at an angle from the associated front member 44 to the rear member 46 of the back frame 4U and is fixed at its ends to said

members

44 and 46.

A cushioned frame which may be upholstered is removably associated with the seat and back frames I5 and 40, respectively. The cushioned frame includes a plurality of coil springs 65, back and seat units 69 and '10, respectively, to each of which a number of the coil springs 66 are se- Y cured, a plurality of wire strands 68 secured at their upper ends to the upper portion of the unit B9 and at their lower ends to the coil springs 66 on the forward part of the unit 10, and clips B1 which secure the wire strands 58 to the upper ends of the seat springs B6 and the forward ends of the back springs 66. Members 69a and H on the back and seat frames 4D and I6, hold the

units

69 and 10, respectively, removably in place.

The upper portions of the two side strands 68 are provided with bearings 12, in which one end of respective arms 'l5 are operably mounted, the opposite end of each arm being operably connected to a head-rest 18 adapted to be adjusted to the respective full and dotted line positions disclosed by Figs. 1 and 3.' f

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1n a chair of the character described, a pair of rails, a seat-frame movable forward and backward upon said rails, a back-frame including two sides hinged at their lower ends to said seatframe, each side being formed of tubular stock and comprising front and rear members the former'of which is bent backward at its upper end and fixed to the upper end of the rear member which latter is bent forward at its lower end and Xed to the lower portion of the front member, a straight guideway for each side of the back-frame extending downward'from the front member to the rear member, a roller extending into each guideway, and a pair of supporting elements extending upwardly from the rails and on the upper portions of which the rollers are mounted.

JOHN M. DOR/TON.