US 2637371 A
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Description (OCR text may contain errors)
May 5, 1953 H. s. sou-rm 2,637,371
CHAIR HAVING RESILIENT FRAME Filed July 13, 1950 I 4 Sheets-Sheet l 3nventor Hare/a 5 Bout/n I (Ittomegs y 1953 H. s. BOUTIN 2,637,371
CHAIR HAVING RESILIENT FRAME Filed July 13, 1950 4 Sheets-Shee t 2 inventor attorneys May 5, 1953 H. s. BOUTIN CHAIR HAVING RESILIENT FRAME Filed July 13, 1950 :4 sheets sheecv 5 7 4. 5 Ll I I a Y a 3 Hare/a, 5 50;: t/h
y 5, 1953 H. s. BOUTIN 2,637,371
I CHAIR HAVING RESILIENT FRAME Filed July 15, 1950 I 4 Sheet -sheet 4 3npentot Patented May 5, 1953 UNITED PATENT OFF ICE CHAIR HAVING RESIIJIENT'FRAME' Harold S. .Boutin, Toledo, Ohio.
Application 11113213, 1950, SerialNo.i173',568
(Cl. 1 55i--5i)1) This invention relates to improvements in chairs and more particularly to an improvement in ,achair frame structure embodying 'anew concept of structure forproviding cantileversupport for the seat of the chair and a new means for providing resiliency in the chair frame.
Chairsem'bodying the invention are particular-- 1y adaptable for use as stenographers" or-clerks posture chairs, as factory chairs, as st-sols, for example in kitchens or in barsor atlunch counters, as dinette chairs or as restaurant chairs.
Modifications of the-invention canbe: embodiedin chairs designed for all of these purposes as well as for other uses and purposes where simplicity and inexpensive construct-ion-are desired, modern appearanceis an attribute and comfort during long perio'tlsoi sitting an object.
The construction-ofchairs embodying the invention can besti'be understood reference to the drawings, in which:
Figure I is a view in: perspectiveof a" stencgraph'er s posture chairembodyingth'e invention. Figure 11 is a vertical; sectional view taken substantially ona medianplane-ofa chair similar tothe-chairshown in Figure I- but without cast-- Figure III is a rear elevation, with parts-being broken" away; of thechair shown in FigureII Figure IV is a fragmentary horizontal- View showing-details of the sea-t support the framesh-own in section at the position indicated by the line IV-IV of" Figure II;
Figure V is a viewin side "elevation. of another embodiment of the invention as designed for use as a factoryxchair; or'a high level chairs-uch as usech by telephone switchboard operators, in.
hitohens; or adjacent counters or bars.
Fig'urevVES is a-fragmentary:enlarged view partlyin' section showingaiioot rest supportwhich maybe employed on thechair: shown inrFigure V Figure V31 is :an. enlarged; detailed view of the backrest supporting, meansused-a on. the chair illustratedin' Figure; V5;
EigureVHl' isa plan viewroif;thezhacltirestsupporting; means illustratedainFigure-VII.
Figure:- IX is an: enlarged; detailed view 015: aback. rest: as; employed om the chairs illustrated inahigures- I through lll.
Figure X is an enlarged, detailed, sectional.
view takenonthe line offhigureeliiii.
Figure is-a ,fragmentary, detailed; enlarged view of? the back: rest supporting; means shown inFigure IX.
Figure XII. is. a. fragmentary, sectional: viewtransversely across the seat of thechairnillus.
trated in Figures I through IV.
Figure is a fragmentary view illustrating another -modification of the chair-as designed for use by a small child.
Figure XIV'isa plan view of the portion of the chair shown in Figure XII-I.
A chair embodying'the' invention and designedfor use as a stenographers posture chair is-iliustrated' in Figure I. The same embodiment of the invention, but slightly modified" for use as a stationary chair, for example, in restaurants, dinettes, porches as a lawn chair and forother uses, is illustrated in Figures'Il and III. The
details of construotionof the chair shown in Fig ures I, II and are identical, the-only diner-- ence being the presence'oi casters in the embodiment illustrated in- Figural;
A chair embodying the invention has a main frame c p si'ng a base section l l whichcon si'sts in a-rear por-ti'oi'r I 2 and side portions i=3 havinginwardly turned frontends i 4 The main frame preferably is constructedfiom tubing, forexample, stainlesssteel tubing or aluminum-tubing withthe aluminum having aconsiclerahle portion oi'alloy'm'eta'l to give it resiliency. Other metals-and other materials may also beemployed;
it being'necess'ary only that the structure have resiliency for comfort support for a person seated on-the chair as willlater be explained.
The rear portion lwof the frame extends gen erally crosswise ofthe chair and may be shaped in a curve-oi? large radius. At what. would-be the rear corners of a conventional chair, a sharper curve; as at 1.5, blends intotheside portions 13 of'thevbase section I1 and the two side portions I 3 extend forwardly in laterallyspaced'relationship; The preoise'curvatures of the rear portion l'2, the corners I51 and the side portions I 3. are: not critical and they maybe one oontinuous curve or. they may bear series of blending curves as'is illustrated in Figure I.
The: front. ends lioi the side portions R3 are turned inwardly toward each other. in a sharper curve as at [6 and then are turnedrear-rovardly' againsubstantially parallelT and in spaced relationship: The turned inv portions of the base section blend. into upwardly. sweeping parallel elements H- of the main support section of the frame Iii. The elements H consist in upwardlysweeping curvedportions' which blend into rear.-
wardly' inclined, parallel, spaced, straight portionsv I6; Again,- the precise curvature of the curved portions of theelements: W is not at all. critical nor are the: radii" of the curved sections blending betweentheirlower forward ends and:
the inwardly turned front ends 14 of theside portions 13.
While the precise curvatures of all of these elements and portions of the chair are matters of choice, one factor must be taken into consideration in their curvature and design. The rear portion l2, side portions l3 and the front ends |4 thereof, all lie substantially flat on the floor in a chair embodying the invention which is not equipped with casters (for example, the chair shown in Figures II and III). It is necessary, therefore, that these portions of the base section all lie substantially in the same horizontal plane. Similarly for simplification of structure, in a chair designed to be moved (for example, the stenographers posture chair illustrated in Figure I) the portions of the base section should be fiat so as to permit the attachment thereto of four or more substantially identical caster elements I 9. The caster elements generally indicated at H! may be welded or otherwise secured to the base section II as shown in Figure I, these elements l9 preferably are offset caster elements having twisted shafts rotatable at one end on their axes in mounting blocks and at their other ends rotatably carrying bell shaped wheels, which facilitate the moving of the chair. Conventional vertical axis casters may also be employed if desired.
A look or spacer preferably is secured between the elements of the support section of the chair in order to insure their ilexure simultaneously and to the same degree during the action resulting when a person sits on the chair as will later be explained. The uppermost ends of the tubes forming the straight portions l8 of the support section of the chair may be closed by metal caps 2|.
In the modifications of the invention illustrated in Figures I, II and III the upper ends of the portions I8 of the support section are secured to each other by a seat support member 22 (see Figures II and III). The member 22, shown as a casting in the drawings, is designed to fit between the parallel straight portions H of the support section and is secured to the upper ends of the portions l8 by four machine screws 23, which pass through the portions 8 and are screwed into the member 22. The member 22 is provided with a series of horizontally extending notches 24 which are spaced vertically from each other by fixed distances. support strap 25 has a turned over lip 26 (Figure II) which is engageable in the notches 24 in the member 22. The strap 25 extends downwardly and then forwardly between the spaced straight portions |8 of the support section of the chair being turned horizontally to form a seat support 21 cantilevered out above the upwardly sweeping portions ll of the support section of the chair. A rider 28 is secured to the support strap 25 near the point where the latter extends forwardly and slides along the rear surface of the straight portions 8 of the support section.
The seat support 21, which may actually be an extension of the seat support strap 25, is provided with a pair of elongated slots 29 through which extend two screws 30 provided with wing nuts 3|. The screws 30 are embedded in a formed molded seat 32 in the modification of the invention shown in Figures I, II and III and serve to secure the seat 32 to the chair support 2'! and on the chair The chair support 2'! may also be provided with a ring 33 which may be weldel to the chair support as at 34 (Figure II) and 35 (Figure IV).
A seat In the embodiment of the invention illustrated in Figures I, II and III the seat 32 is molded from, for example,'resin impregnated laminated fabric. The ring 33 may or may not be provided with an annular rubber cushion 36 (see Figure XII) or it may be desirable in other cases to surround the bolts 30 (Figure II) with resilient washers 31 above and below the seat support 21 to eliminate possibilities of rattling or working loose and to make a flexible joint between the seat 32 itself and the seat frame, consisting in either the seat support 21 or the ring 33. These details can be modified as desired to accomplish facility in construction, particularly of the molded resin impregnated seat 32, the selection of particular cushioning means between the seat and seat support frame being a mere matter of choice.
A back rest support 38 may be welded to the seat support strap 25 as at 39, and extends up wardly parallel to the seat support strap 25 a distance sufficient to lie in front of the support member 22. A knurled thumb screw 4. is threaded through the back rest support 38, bearing against the forward surface of the support member 22, thereby to maintain the engagement of the lip 25 of the seat support strap 25 in one of the notches 24.
At the upper end of the back rest support 38 (see Figures IX, X and XI) there is fixed a horizontally extending resilient bow 4| which at each end terminates in a pin 42 (see Figure XI) engageable in either of a pair of spaced holes 43 in each of two inserts 44 which are molded into opposite sides of an oval, horizontally extending back rest 45. The oval back rest 45, like the seat 32, may be molded from resin impregnated laminated fabric or from similar material or these two parts may be made from molded plywood or they may be merely fabricated from metal as by stamping. The particular material used for the shaped seat 32 and back rest 45 again is a matter of choice, although the drawings illustrates the seat 32 as being made from molded synthetic resin and the back rest 45 as being fabricated from similar material.
Because of the resiliency of the back rest supporting bow 4|, the back rest 45 may be easily disengaged therefrom by flexing the bow 4| and withdrawing the pins 42 from that pair ofthe holes 43 in which they are inserted. This arrangement provides for quick and simple adjustment of the height of the back rest 45 relative to the seat 32. The two pairs of holes 43 are positioned, for example, one-quarter inch and three-quarters inch away from the horizontal center line of the back rest. Thus, with the back rest bow -4| engaged in the nearer pair of holes 43, its position can be quickly changed by disengaging it and inserting the pins 42 in the more removed pair of holes 43. If this'adjustment is not appropriate two adjustments on the other side of the center line are provided by disengaging the back rest 45 from the bow 4| rotating it degrees and re-engaging the pins 42 in the holes 43. By spacing the holes 43 off the horizontal center line of the back rest four adjustments in height can be provided with only two pairs of holes 43. If still more adjustments are desired, the inserts 44 may be equipped with three or fours holes each, thereby increasing the positions relative to the center li e of the back rest 45- in which the pins 42 on the bow 4| may be positioned.
thereupon re-engaging the finger 74 in its new position; 'The forward end of the seat support strap 15 may be connected by means of side straps 18 to a horizontal pipe frame 19 which alsois secured'to a back 80 of the seat 11. The pipefr'ame'19, may also be welded or otherwise secured, as at 8|, to the looped over portion of theseat support strap 15. The pipe 19 serves thus as an integral frame element in the babys chair and its front portion 81' may also serve to support a tray 83i which maybe welded or otherwise secured thereto,'for 'example,for feeding the child. The spacing between the two arms of the strap- 15 may be adjusted by a screw 84 which extends through the rear arm of the strap 15 and isthreaded into the front arm of the strap 15.
'-'The several modifications of chairs embodying the invention are disclosed to illustrate the novelty-comprising the instant invention. The. particular shape of seat or back rest, the particular arrangement of seat support strap and back support elements or the means of mount-- ing the several types of seats and back rests shown; are details in the instant invention; but
the invention consists primarily in a redesign of chair frames which provides a generally horizontal base section and a rearwardly and upwardly extending seat support section that is connected to the base section only at the for-- ward portion of the basesection and from which support section a seat is cantilevered forwardly of the support section, the seat generally overlying the base sectionand the rearwardly and upwardly sweeping portion 'of the support section.
Having described the invention, I claim:"
- 1. A chair comprising, in combination, a frame having a horizontal base section lying generally in a single plane, said basesection consisting in a rear cross portion and side portions joined to said cross portion and extending generally for-- wardly and being laterally spaced from each other, said side portions being turned inwardly toward each other at the front and then generally atthe center being turned backward generally parallel to each other, and a support section consisting in portions joinedto the back ward extending parts of said side portions of said base section and sweeping 'rearwardlyand upwardly in a curve of relatively large radius and culminating in substantially parallel, substantially straight portions inclined rearwardly to' the plane of said base section at an angle of less than ,90" degrees; a generally horizontal, forwardly extending seat; and a seat supporting frame underlying said seat and connected to said support section at the rear of said seat.
2. A chair comprising, in combination, a frame having a horizontal base section lying generally in a single plane, said base section consisting in a rear cross portion and side portions joined to said cross portion and extending generally forwardly and being laterally spaced from each other,-'said'side portions being turned inwardly toward each other at the front and then generally at the center being turned backward generally parallel to each other, and a support section consisting in portions joined to the backward extending parts of said side portions of said base section and sweeping rearwardly and upwardly in a curve of relatively large radius and culminating in substantiallyparallel, substantially straight portions inclined rearwardly to the plane of said base section at an angle of less than degrees; a generally horizontal; forwardly extending seat; a seat supporting frame underlying said seat and connected to said support section at the rear of said seat; and means for holding the portions of said support section in predetermined lateral spaced relation to each other.
3. A chair comprising, in combination, a frame havin a horizontal base section lying generally in a single plane, said base section consisting in a rear cross portion and side portions blendingly joined to said cross portion and extending generally forwardly and being laterally spaced from each other, the forward ends of said side portions being turned inwardly toward each other and then generally at the center being turned backward generally parallel to each other, and a support section consisting in a pairv of generally parallel portions joined to the backward extending parts of said side portions of said base section and sweeping rearwardly and upwardly in a curve of relatively large radius and culminating in substantially parallel, substantially straight portions inclined rearwardly to the plane of said base section at an angle of less than 90 degrees; a generally downward extending seat support adjustably supported from the top of said straight portions, and a horizontal forwardly extending seat supported on said seat support. 4. In a chair according to claim 1, an improvement in the means for connecting the seat supporting frame to the seat support section that consists in a seat support member secured to the upper end of each of the straight portions of said seat support section and serving to laterally space and secure said portions together and that has a vertical row of spaced recesses located between said upper ends for engagement with means on the seat supporting frame.
HAROLD s. BOUTIN.
References Cited in the file of this patent UNITED STATES PATENTS