US2271330A - Chair - Google Patents

Description

Jan. 27, 1942. c, C, DlcKsQN 2,271,330

QHAIR Original Filed April 20, 1938 C'lfo'ml C. Dickson Patented Jan. 27, 1942 The Fritz-Cross Company," St. corporation of Minnesota.

-Paul, Minn., a

original application Apri1:2o,f19ss, serial No. f

203,054. Divided and this application Novem bei-15,1939, serialNasoisas eolaims. (cl. 155-161)A My invention relates to chairs and particularly to chairs having a back rest, and has for an object to provide a construction by means of which the back rest may be easily and quickly adjusted in a back and forth direction.

Another object of the invention resides in provid'ing a chair in which the back rest may be adjusted while the operator is seated on the chair.

A still further object of the invention resides in providing a chair in which the back rest becomes automatically'locked in adjusted position.

A feature of the invention resides in providing a construction'for adjusting the back rest of a chair including a threaded member disposed at the forward portion of the chair and immediately below the seat thereof.

Another object of the invention resides in pro,- viding a construction which will not interfere with the standard of the chair.

A still further object of the invention resides in providing a construction which may be made of bar metal. n

A feature of the invention resides in providing a construction having a yoke formed from a bar bent to provide two legs pivoted to the back rest frame and straddling the standard and a cross bar connected thereto.`

An object of the. invention resides in providing a screw xed relative to the standard and issuing forwardly therefrom, and in providing a threaded sleeve rotatable relative to the crossbar and threaded on said screw for moving the yoke relative to the standard.

Other objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/or described.

In the drawing:

' Fig. 1 is a perspective view of a chair illustrating an embodiment of my invention.

Fig. 2 is a fragmentary sectional view taken on line 2-2 of Fig. 1 and drawn to a greater scale.

Fig. 3 is a plan sectional view taken online 3-3 of Fig. 2.

This application for patent is a division of my copending application for patent for chairs, Serial Number 203,054 filed April 20, 1938.

For the purpose of illustrating the application of my invention, I have shown in the drawing a chair adapted to be used as a stenographers chair and which is indicated in its entirety bythe reference numeral I0. This chair consists of a base I I, a seat frame I2, and a seat I3"mounted thereon. Extending upwardly from the seat frame I2 and connected to it at the rearward portionthereof is a vertical frame I4 which supports a back rest I5. Theback rest I5 is adjustable in a back and forth? direction and the construction by means of which this is'accomplished constitutes the principal lfeature of this invention. The various parts of the chair I0 will nowbe described in detail. l f The base I I may be constructed in any desired manner. In theforrn -of the chair'sho'wmlfour l The frame I4 is constructed from a single length n of any suitable tubular materialwhich is bent to form the'variousmembers referred to. The ends of the tubular material are vwelded togethenthe joint being preferably formed in the cross framev member 23. The vertical frame membersZI and 22 are constructed with reversebends 36 `near their upper ends which form olf-sets 3'!` and 38,

in the said frame members which are disposed p inwardly of the major portions of the said framemembers. The frame members 2I and 22 are attached tothe frame I2 byv a construction to be presently described in detail. f y The back rest I5 maybe constructed in any suitable manner and has attached to it two brackets 21 which are pivotally connectedtosuit.-` ablesupportscarried by the vertical frame members 2I and 22 of frame I4. This back rest may be raised and loweredby means Nof any suitable construction, which not forming a feature of the instant invention has not beenshown in detail in the drawing. f y 1 f i. l The frame I2 is best shown in Fig. 3, and is constructed from a single bar of metal which is l bent to provide two longitudinally extending frame members 3| and 32, a rearwardly extending cross frame member 33 and Atwo forwardly extending cross frame member sections 35 and 36 which are joined together at 31 to form a single front cross member 38. At the center of the frame is provided a block 39 which is constructed with grooves 4I andr42 on opposite sides thereof; Two brackets 43 and 44 are `attached to theblock 39 vand have *parallel portions v45 which are.y received within the grooves 4I and 42. Attachment is accomplished by means of two bolts 4l! which extend jointly through the block 39 and through the parallel portion of the brackets 43 and 44. The brackets 43 and 44 have diagonally extending legs 46 which terminate in ears 41, attached to the cross frame members '33 and 38 by means of rivets 48. The block 39 has secured to it a vertically extending standard 49 which is rotatably mounted in the head I1 forming a part of the base II.

The seat I3, of the chair, has attached to the underside thereof, by means of bolts or rivets I, two longitudinally extending bars 52. These bars have outwardly extending ears 53 formed thereon which overlie the ears 41 of brackets 43 and 44 and which are attached to the frame I2 by means of the rivets 48, previously referred to.

The vertically extending frame I4 is pivotally mounted on the frame I2 in the following manf ner: At the joinder of the cross frame member 33 and the longitudinal frame members SI and 32 are formed two loops 54 and 55. These loops Vare constructed with spaced portions 58 and 59 which provide spaces 56 therebetween. The vertical frame members 2| and `22 are arranged within said spaces and are pivoted to the frame I2 by means of bolts 62 which pass through the portions v58 and 59 ofthe loops 54 and 55 and through the -said upright Vframe members. bolts are so positioned that the lowermost cross frame member 24 is situated somewhat below the frame I2, as shown in Fig. 2.

The invention yproper utilizes a yoke 63 (Fig. 3)

which is constructed 'from a' bar bent to provide two longitudinally extending legs 65 and 64 and a cross bar 66 connecting the same. The legs AI-I and -65 are twisted, as designated at 61, to cause the outer portions 68 of the same -to lie `in the same plane. The extreme ends of the portions 68 are looped Ias indicated at 69 to form hinge members which encircle 'the tubular cross frame member 24 of the frame I4. The looped portions 69 are constructed at their extreme ends with tongues 1I which overlie the portions 68 where the same are conned -to the same plane. The tongues 1I are secured to the portions 68 by means of rivets 12 which' prevent hinge members 69 from opening up.

To maintain the two hinge members -69 in proper spaced relation a link 13 is `employed which -extends across 4the portions 68 of yoke v63 and which is secured thereto by means of the rivets 12. The yoke -63 is disposed beneath the brackets 43 and 44 of the frame v'I2 and straddles the block `39 and standard A49. The block 39, as best Vshown in Fig. '2, is `formed at--the lowermost and `forward portion of the'same with an outwardly projecting boss 14. This boss -is threaded to `receive a screw which projects forwardly from said `boss in .a substantially horizontal position. This screw is-held from rotation with reference to the boss 14 by means of a set screw 10 also threaded into said boss and engaging said screw. Threaded on the screw 15 is -a sleeve 16 which has attached to its outer vend a handle -or knob 11 by means of which the said sleeve may be rotated. This sleeve is constructed at -its other end with a shoulder 13 and has attachedto its extreme end a collar 19 spaced from the shoulder 18. The cross bar 66 of the yoke 63 is formed with a hole BI which receives the -end of the spindle 16 and `is held from longitudinal movement with respect to said spindle by means of shoulder 18 and collar 19. In the construc- These tion of the yoke 63 enough play is allowed in the hole BI and between shoulder 18 and collar 19 so that compensation for swinging movement of the yoke 63 due to the oscillation of frame I4 about the bolt 62 is had.

The method of using the invention is obvious. While the occupant is seated upon the seat I3, the knob 11 may be readily rotated to rotate the sleeve 16. This causes the yoke 63 to move rearwardly and forwardly with reference to the block 39 and standard 49, which causes the seat frame I4 to swing about the pivots formed by the bolts 62. The back rest I5 is thus moved forwardly and rearwardly to adjust the position of the same with respect to the body of the user. As the yoke is moved with respect to the frame I4 the said yoke swings about the cross member 24 as a pivot, the hinge members 69 accommodating such movement. w

The advantages of my invention are manifest. An extremely simple and practical construction is provided whereby the back rest may be moved in a back and forth direction. The knob for operating the mechanism is centrally located and is disposed at the forward portion of the seat frame so that the same is readily accessible. By means of my invention adjustment may be made while the occupant is seated on the seat. By the use of the particular yoke an extremely inexpensive construction is provided. By employing a threaded sleeve the threads are concealed and injury to the person or the clothing of the user is prevented. With my invention the back rest becomes `locked in any Vof its adjusted positions due to the threaded member vfor adjusting the same.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

I claim:

1. In a chair, a supporting standard, a seat frame connected thereto, a pivoted back rest frame extending upwardly therefrom, two longitudinal members pivotally connected to the back rest frame and straddling said standard, a cross member connected to said longitudinal members forwardly of said standard, a screw xed relative to said standard and projecting forwardly therefrom, and a threaded member screwed upon said screw and engaging the cross member for swinging said back rest frame in a forward direction.

2. In a chair, .a supporting standard, .a seat frame connected therewith, a pivoted back rest frame extending upwardly therefrom, a yoke having two legs straddling said standard, and a cross bar connected thereto, said legs being pivoted to .the back rest frame, ascrew xed relative to said standard4 and projecting forwardly therefrom, a threaded sleeve screwed upon said screw, means for restraining axial movement of the screw relative to said cross bar, and means at the end of the sleeve for rotating the same.

3. In a chair, a supporting standard, an attaching member carried by the upper end of the standard, a seat frame attached to the attaching member, a pivoted 'back .rest frame extending upwardly from the seat frame, a yoke having two 4legs straddling the attaching member and a cross b ar connected thereto, ,said legs being pivotedA to the back rest frame, a screw attached to said attaching member and projecting forwardly therefrom, and a threaded member screwed upon said screw and engaging the cross bar for swinging the back rest frame in a forward direction.

4. In a chair, a supporting standard, a seat member connected thereto and disposed at the lowermost portion thereof, means for pivoting said vertical frame members to said seat frame at a locality above said cross frame member, a yoke constructed from flat bar metal having two legs straddling said standard and a cross bar connected thereto and arranged with said cross bar and adjoining portions of said legs disposed vertically, said legs having quarter twists therein to cause the ends thereof to lie in a common plane, means attached to the ends of said legs for pivoting the same to the cross frame member of the back rest frame, and threaded means cooperating with said cross bar of the yoke, and a member lixed relative to the standard for moving the yoke longitudinally of the seat frame to procure forward movement of the back rest frame.

5. In a chair, a supportingV standard, a seat frame connected thereto, a back rest frame extending upwardly from said seat frame, pivot means for pivoting said back rest frame to said seat frame, said back rest frame having a cylindrical cross frame member extending below said seat frame, a yoke constructed from ribbon material and having two spaced legs straddling said standard and a cross bar connected thereto, said legs having quarter twists therein intermediate the ends thereof, the ends of said legs being wrapped around said cross frame member to pivotally connect said yoke thereto, and threaded means acting between said cross member of said yoke and a member xed relative to the seat frame for moving said yoke relative to said standard to procure forward movement of the back rest frame. y

6. In a chair, a supporting standard, a seat frame connected thereto, a back restrframe extending upwardly from said seat frame, pivot means for pivoting said back rest frame to said seat frame, said back rest frame having a cylindrical crossl frame member extending below said seat frame, afyoke constructed from rib-bon material and having two spaced legs straddling said standard and a cross bar connected thereto, said legs having quarter twists therein intermediate the ends thereof, the ends of said legs being wrapped around said cross frame member to pivotally connect said yoke thereto, threaded means acting between said cross member of said yoke and a member fixed relative to the seat frame for moving said yoke relative to said standard to procure forward movement of the back rest frame, and a link connected tothe ends of the legs of said yoke for restraining spreading thereof.

CLIFFORD C. DICKSON.

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