US1848338A - Chair - Google Patents

Description

March s, 1932.

.l` A. GARROW CHAIR Filed Aug. 3l, 1928 llllllll lllllrilwll WW www d G A. m m

elliot :w41

Patented Mar. 8, 1932; i'

u i @mcsi v .l JAMES A. GARnow, fQrfs'r. rieur.. MINNESOTA, Assienoa` 'ro 'THE FRITZ-CROSS y coMPANmoF sr. PAUL,Y M1N1vnsorA,.A CORPORATION or ivrnmnsorn Vemma 5 Applicationled August 31, 1928. Serial No. v303,143.'v

My invention relatesto chairs `and has for its object to provide a chair including a back -rest which is adapted to be readily and conveniently adjusted to tthe back of the user so as to insure correct posture and comfort. n

, Another k.object of the inventionresides in I constructing achairwith a seat and in pivot- Y si'desin attaching to'said--uprights plateshav- 20 ally connecting to the rearward portion of the seat a pairgof puprights and to further provide adjustable braces. for holding said uprights iny adjustable position. 'f

*A still vfurther objectV ofY he invention re? sides in pivotally attaching totheupper-portion ofV said uprights a pair of forwardly eX- ytending members adapted to swing inavertical direction and in attaching to kbers aback rest.

A still `further object of the inventionlre- A'said 'meming segmental shapedslots concentrically disposed relative toV thei .pivotsv of said members and kin -f `further providing bolts extending through said slots and members for holding `saidvmeinbers in adjusted position. A -eatureof the invention resides in'pivotally mounting said back rest upon said members.' v

Otherobjectso the invention yres-ide in the novel combination and arrangement of parts i and in the details of construction hereinafterdescribed and claimed. Y

In` the Vdrawings :v

- Fig. 1 is a perspective view of a chairillus- Vtrating an embodiment of my invention. y f

Fig. 2 afragmentarydetail-view of the back rest supporting structure.

Figa 3j isa longitudinal sectional yview of the seat supporting"structure of the invention.V V

, Fig. 4EV is a sectional view: taken on Kline'A f P- 1 of Fig.1 2 and drawn to a vlarger scale.

[Inrprior types of adjustable chairsiconsiderable disadvantage arises from the fact that y sufficient verticaladjustmentcannot be procured-without y,causing the supporting struc.

-tached toV the seat supporting structure B ina manner best shown in Fig. 3. The uptures of the chair to extendoutwardly beyond j the seator back rest portion in a protrusive manner.' My invention overcomes this Vdisadvantage providlng a, chair in*` which the back rest may be quickly and positivelyl ad. 50" l i justed to 4adapt itselflto'v'arioususers and in which the supporting structurefthereiore ried by a seat support indicated in its entirety n n at B together with aback restC. TheV seat A comprises a rectangular ra1ne`10- constructed yof bar metal'and formed with sides 11 and front and rear portions' 12 which' are -50 v welded or rivetedtogether to form a unitary construction. Across theftop of this frame are attached two 'U bars 13and14;` whichare rivetedto the lfront and back12 through the agency of ears 15 formed thereon. Upon the two bars 13'and 14 and the frame 10 is sup-f. ported a cushion 16 which may be of any su'it-y V'able"construction randv which may be attached to the bars y13y and 14 by screwsor. which may be secured thereto inany other suitable mane ner.

VThe seatv A is supportedk uponvastandard 17 which is f-.jpreferably constructedv of a cylindrical krod and which isV swivellyk atper end 18 of`V this rod is turned down to form a shoulder 19 and is mounted in a longitudinal `boreA 20 formed inV al f casting 21.

I.'Ifhiscasting isgpreferably securedfto the kS0 .Ai'rameinemberV 10 by bars y22 {which Vare bolted tothe said vcasting byboltsv2ll and whichisbolted or otherwise .n secured tosaid frame members.- For holding; the standard 17 iny p1acefwithinthe" casting 21 theex-f tremel end of the saine as indicated at23fis riveted .over the castingy `21 which serves `to Y firmly attach saidstandard to the seatstructure. 'The seat supporting structure B includes a crown block 26 which is preferably in the form of a casting provided with a central bore 27 and a plurality of circumferentially arranged bores 28 symmetrically disposed about the bore 27. The standard 29 is slidably mounted in the bore 27 and is adjustreceived within an enlargement 46 of the :bore 27. The Crown block 26 is constructed -with an upwardly facingV seat'47 which enably held supported therein by a device to be presently described while a plurality of outwardly extending tubular legs 29, 301,

31 and 32 are mounted in the bores 28. It

vcrown block so as to hold the tubular le s 29, 30, 31 and 32 from projecting throng the same and to provide a cap for obscuring the upper ends thereof. These legs are se-y cured ywithin the bores 28 by means of screws 34 or in any other suitable'manner and are curved or bent so as to bring the extreme ends thereof outwardly fromV the crown block 26 so as to support the seat A n a stable manner. legs may be attached casters 33 of any suitable size or design.

For swivelly mounting the seat A relative to the supporting structure B I employ a collar which encircles the standard 38 and is attached. thereto in a manner to be presently described and which is adapted to be gages with a shoulder 48 on the lowermost ortion of Collar 45 andforms an end thrust eating therefor, A screw 49 threaded into the crown block 26 enters an annular recess formed upon the exterior of the collar 45 and .serves to hold this collar from removal from the crown block 26, At the same time the said collar is free to rotate` sopas to perymit the seat A to swivel relative to the supporting structure B.

The locking device for holding the standard 17 in adjustedy position relative to the crown block 26 is shown in detail on 3. This device consistsfof a lock bolt 35 provided With astem 36 of reduced diameter connected therewith and having a knurled head 37 secured to the end of the same. This lock pin is slidably mounted in a tubular boss 38 which is constructed with a longitu-k dnal bore 39 of such a diameter as to receive thesaid bolt 35 and to permit of free longitudinal movement thereof. The outer vend f of the boss138 is threaded as indicated at 404 to receive a bushingi41 which is formed with ahead 42'by means of which they same may be screwed into said boss and which is drilled to forni a. guide for slidably support- To the ends of these` serves to normally force the said lock bolt toward the standard 17 where the same may engage any of a number of recesses 44 formed therein for supporting the said standard in vertically adjusted position.'

The back rest C is carried upon a back rest support which is constructed from a single bar of metal formed with a pair of spaced uprights 52 and 53 and a bridge member 54 connecting the same at their upper ends to form an inverted U-shaped fromm The uprights 52 and 53 are pivoted to the frame 10 at the rearward portion thereof by means of two rivets 55 which pass through said uprights andthe frame members 11. These uprights are further supported by means of two braces 56 and 57 which are pivoted to said uprights intermediate the ends thereof by means of rivets 58 as best shown in Fig. L These braces are preferably curved as shown to yoffer as little obstructionV as possible to the free movement of the occupant. Alon the forward portions ofthe frame mem rs 11 are formed serratedy slots 59 which are adapted vto receive bolts 60 paesing through the forward ends of the braces 56. By means of these slots the braces 56 fmay be positioned with the bolts 60 thereof ldisposed. in any of the serrations of said suitable manner and consists preferably of a suitable cushion 61 which has attached to it two brackets62 and 63. These brackets are formed with flanges 64 byvmeans of which the same may be attached to the back of the back rest C.. Upon the inner surfaces of the luprights 52 and 53 and immediately adjavslots 67 of quadrant 66, bar 69 and bracket 62. Wing nuts 73 on each of these bolts serve to clamp the parts together so as to hold the said hars in adjusted position relative to said quadrants. By means of this construction the height of the back rest C relative to seat Ay may be readilyadiusted by merely swinging the bars 69 and 70 upon their pivots and subsequently tightening the wing nuts 7 3 for holding the same in place. l

Tn addition to adjustably supporting the back rest C in both horizontal and vertical 'direction the same is adapted to be pivoted 'in' suchV a'manner as to readily conform to The vback rest C may be constructed in any the contour ofthe back of the occupant af-v )13 .pearance to the chair.'A Vrihe raising and low p v1,848,338 fter the bars, 69 and 70 have been secured in adjusted position. This is accomplishedy by rotatably supporting ythe 'brackets 62 Vand 63 upon the bolts '7l and 72. These bolts being identical, the construction kof bolt Z2 is" shown in detail in Fig.y 4. As will be noted the shank of said bolt adjacent the head 74 which I have indicated at 75, is somewhat enlarged with respect to the major portion of the shank thereof. This enlarged portion passes throughthe bracket 62 and is of a length slightly greater than the thickness of said bracket. A shoulder L76v formed by means of this enlargement 7 5 bears against the bar 69 and servesto clamp said bar relative to thequadrant 66, at-the same time permitting the bracket 62 to revolve relative to said bolt. A spring washer 77 rdisposed between the head 74 of thisbolt and the bracket 72 provides sucient friction to hold the back rest A in adjusted position, vthereby preventing the same from accidentally falling orloosening its desiredpivotal adjust ment.V y

In the use of the chair the standard 17 is first adjusted to seat the occupant at a proper height relative tothe floor sothat the occu- Vpants feet rest firmly upon the door and in a natural position when the occupant is properly seated. rlhe height of the back rest 1 C is then regulated by yadjusting the'bolts 71 and 72 so that the said back rest reaches the occupant slightly above the small of the back. By next adjusting the ends of the braces 56 and 57 the said back rest can be adjusted lat-V erally so as to just reach the occupants back when the occupants legs come up to the forward portion of the cushion l-which'as noted in Figl, is generously'curvedtoprevent discomfort to the user. Vhen in Vsuch position the body of the occupant is free along the forward and rearward portionsof the chairk j due to the fact that the `upright-s 52 and, 53

are spaced from one another at these points i the entire width of the chair. At the same 'time the curvature of the `brace 56 prevents interfere-nce with the movements ofthe arms be supported in such a* manner as to prevent mental and physical fatigue and results in increased. etticiency and better health. A

greaterdegree of adjustment may be hadA with my chair than is possible with other chairs having adjustable back rests without causing the supporting structure to protrude ,outwardly beyondthe back rest andseat in such a manner asto give an oensive ap,

ering of the backrest can be independently accomplished so that each adjustmentcan be in the scope otwhat isclaimed without departing `from* the spirit of my invention.v

Having described'my invention, what l claim as lnew and desire to protect-by Let-V ters Patent is 1. A chaircomprising a seat,uprights extending upwardly vfrom said seat and pivoted at their lower endsito the rearward portion of said'seat, means forholding said uprights in adjusted position,fplates attached to saidl ing through said members Vand segmental,

slots for locking said members in adjusted position relative to said uprights,and a back rest swingably mounted on said bolts. i

2., A chair comprising `a seat, a. frame including an upright extending upwardly from saidseat, a plate attached tosaidA upright,

said plate having aosegmental slot, a member pivoted to said frame at the center of curva` ture of said solt, a bolt passing through said member and segmental slot for locking said member in adjusted position` relative to said upright, and a back rest swingably mounted upon said bolt. Y

3. A chair comprising a seat, an upright said bolt being spaced from the pivot of said member anda back rest swingably mounted on said bolt.

pivotallyv connected to said upright, means includimr an eccentric-ally situated boltfor holding said member in locked posi ion withV respect to said upright, and a back rest swing ably ymounted on said bolt. v

5. A chair comprising a sea-t, an upright `extending upwardly therefrom, a member pivoted to said upright, a backrest pivoted to said member at another locality, and a single device for simultaneously locking said member and back rest from swinging movement.

6. A chair comprising al seat, an upright extending upwardly therefrom, a member swingable relative to saidupright about a attached to said seat and extending upwardj Y kv 4. A chair comprising ak seat, lan uprightextending upwardly therefrom, a member certain axis, a back rest swingable relativev to said member about an axis spaced frompsaid first named axis, and means extending jointly back rest in adjusted position.

7 A chair comprising aseat, an upright extending upwardly therefrom, a member through said upright, member and backrest for simultaneously holding said member-andv swingable relative tosad upright, a, back rest swngble relative to said membex` and about a dferent axis, said upright, member and back nest having overlying portions formed y with registering openings, and means includ` ing a single memberv extending through said openings for simultaneously holding said member and back rest in adjusted position. In testimony whereof I have aiixed my signature 'to this specification.

JAMES A. GARROW.

Images