US1997486A - Chair - Google Patents

Description

April' 9, 1935. H. T. HALLOWELL CHAIR Filed May 25, 1952 5 Shgeets-Sheeh l Ira/"9% fla wed Patented Apr. 9, 1935 CHAIR Howard Hallowell, Jenkintown, to Standard Pressed Steel 00,, a corporation of Pennsylvania Pa., assignor J enkintown, Pa.,

Application May 25, 1932, Serial No. c13,491

1 Claim. (01. 155-157) The object of my invention is tomake a chair in a simple and substantial manner and to pro .vide the chair with an adjustable support fora back rest. 1 l I This object I attain in the following manner, reference being had to the accompanying drawings, in which: r i

Fig. 1 is a side view of my improved chair;

Fig. 2 is a sectional plan view on the line 2-2, Fig. 1, showing the chair seat in dotted lines; 1

Fig. 3 is a rear View of theback rest;

Fig. 4 is a plan view of the back rest;

Fig. 5 is a detached perspective view of the adjustable support for the back rest; f l

Fig. 6 is a side view showing the improved back rest supportas applied to a modified form of seat frame; and p Fig. 7 is a plan view of the seat frame shown in Fig. 6. l

Referring to Figs. 1 and 2 of the drawings,l is one type of base of the chair to which my invention is applied, consisting in the present instance of four bent legs, which are welded at their upper ends to'a tubular socket 3, into which extends the stem 4 is clamped 5 and 6 by means of stem 4 of theseat sectiom This between two shaped bars rivets or bolts 1. Each bar has a central semicircular portion which partially encircles the rivets l are applied the stem is rigidly held bebetween the two bars5 and 6. Theseshaped bars are bent as shown in Fig. 2 and'have ears 8 at their ends, bent horizontally and secured to the under side of the seat 9 byscrews ID or other fastenings.

l l is a backrest securedto the heavy bent wire support l2 by means of aclamp bar l3 shaped to partly encircle the rounded surface of the support. Clamp screws I 4, on which are wing nuts 15 in the present instance, tightly clamp the back rest into the position to which it is'adjusted.

The supports are bent rearwardly so thatthe en tire area of the seat can" be used without inter-5 ference, and the long ends l6 extend through openings l1 in the arms I9 ofthe bars 5 and-6.

and the. ends of the arms of the support are" threaded at 28, and on the threaded portion of the arms are two wing nuts 2| and 22. One of these wingnuts is on one side of the forward arms IQ of the bars and the other wing nut is on the rear side thereof, so that the back rest can be adjusted towards or from. the occupant of the seat by turning the wing nuts, and when the back rest is in the proper position to support the back,

the nuts are screwed tightly against the arms l9 with beveled corners. made in the present instance of plates bent to form angle bars, and the upper end of each leg l to the frame at the corners.

tangular base frame 25,

of the bars to support the back rest rigidly in position.

TENT.

' While I have shown my invention as applied to 7 a swivel chair, itwill be understood that it can be applied to othertypes of chair frames without departing from the essential features of the invention.

Referring to the modification shown in Figs.

. 6 and 7, 25 is a rectangular base framemade of four strips of metal bent at the ends and welded together to form a complete rectangular frame 26'are the legs, which are is flattened to fit against the beveled cornersof the frame 25, and these flat surfaces are welded '21 are two angle plates which extend transversely above the recand the horizontal por tions 28 of these angle plates are secured to the seat section 9a by screws or other fastenings which pass through slots in the said plates. tical portions. 29 of the angle plates are riveted to perforated plates 30, Fig. 6,the rivets passing through holes in the flanges 29 of the plates 30, and through holes in the angle plates- The plates 30. have a series of perforations 31 near each side passage of screw bolts 32, which extend through one of the perforations at each side of the plate 30. This arrangement allows for vertical adjust-.

ment of the seat section andalso allows the seat section tolbe tilted to accommodate the occupant accommodate the occupant in a comfortable po'-,

sition. The seat can also be tilted forward when desired. v i

The two rods I6 which supportthe back rest extend through perforations in the plates 21. f

The thumb nuts 2! 'andZZ, are adapted tothe threaded portions of the rods; Qnethumbnut 2| on each rod is mounted at the The verand the main frame I is slotted at 33 for the upper end of the tubular stem, so that when the outer side of the forward plate 2l,and the other nuts 2| are mounted at the inside of said plate. By turning these nuts the back rest can be adjusted to accommodate the occupant of the'seat. The rods I6 of the back rest are supported at the forward and rear ends of the seat structure, and can bereadily adjusted longitudinally and firmly held after adjustment by the two sets of set screws. I claim: t

; combination of'a chair seat; a seat frame secured to'the underside of the seat, said frame having vertical members near the front and rear of the seat; the members being perforated for the passage of the arms of a back support; a

back rest; a U-shaped back support consisting of an upper cross member and two arms spaced apart; a transverse clamp engaging thearms of thesufifioftbelow the cross member: clamp screws for' adfiustably securing the clamp and back rest to the arms of'the support, thelower portions of the arms of the support being bent to extend horizontally under the seat and freely through the perforations in the back and front" providingforward and rearward adjustment of the back' rest in respect to the seat;

VHOWARD 'r. HALLOWELL.

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