US1217268A - Adjustment for tilting-chairs. - Google Patents

Description

H. w. BoLENs.

ADJUSTMENT FoR'lLTING CHAIRS. AAPPLICATION FILED IUNE16| |9l5 RENEWED MN. 22' 19H..

1,217,268. Patented Feb. 27,1917.

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HARRY W. BOLENS, 0F PORT WASHINGTON, WISCONSIN, ASSIGNOR TO GILSON MANU- FACTURING- COMPANY, OF PORT WASHINGTON, WISCONSIN, A CORPORATION 0F WISCONSIN.

Specification of Letters Patent.

Patented ret. 27, 1917.

Application filed June 16, 1915, Serial No. 34,412. Renewed January 22, 1917. Serial No. 143,844.

To all whom t may concern:

Be it known that I, HARRY W. BoLENs, a citizen of the United States, residing at lort Washington, in the county of Ozaukee and State of Wisconsim have invented a new and useful Adjustment for Tilting- Chairs, of which the following is a specification.

My invention relates to improvements in tilting-chairs, and has particular reference to a new and improved adjustment for the same-that is, for raising and lowering the chair-supporting mechanism.

The principal objects of the invention are to avoid wear, and thus increase the life of the adjustment, by substituting for the well-y known threaded adjusting-post, designed to raise and lower in a threaded socket located in the chair-base, a fixed post, and mount upon the same for vertical adjustment the chair carrying-means or mechanism; and, furthermore, to reduce the cost of the adjustment by a simplification and reduction in the number of the parts composing the same, and yet at the same time sacrice none of the convenient features thereof whereby the chair-seat may be readily raised and lowered.

Other, though minor objects, of the invention will hereinafter appear, and the novel features of the invention will be particularly pointed out in the appended claims.

Referring to the drawing- Figure 1 is a vertical, central, sectional view of a portion of a chair-base carrying an adjustment constructed in accordance with my invention, parts being shown in elevation; and, v

Fig. 2 is a horizontal cross-sectional view on the line 2-2 of Fig. l; while, Y

Fig. 3 is a detail in inverted plan of the washer.

Similar numerals of reference indicate similar parts in all the gures of the drawhe chair-base l, s of the conventional form, and has let into its upper side and at its center, the metal bushing 2, at the upper end of which Occurs the circular flange 3.

Within the bushing, in the present in stance, is secured by a set-screw 4, the nonrotatable rigid adjusting-post 5, which eX- tends above the bushing a suit-able distance and is threaded. The inner end of the setscrew 4L may simply impinge against the ading to mount the same in the base in suchf manner as'to prevent all movement therein and thus do away wlth the usual wear and consequent looseness.

Threaded upon the adjusting-post, is the hub 6, of an adjusting hand-wheel 7 the hub, of course, being thickened, as shown, so as to afford a suiiiciently long bearing on the adjusting-post to reduce wear to a minimum and lend rigidity. Formed integrally upon the upper side of this hub, and surrounding the threaded central opening therein, is a vertical annularI flange 8, the upper edge of which is preferably flared outward whereby to form a peripheral lateral flange or bead 9.- By forming the iiange 8, there is produced an annular socket 10, in the upper side of the hand-wheel 7 and immediately surrounding the upper threaded portion of the adjusting-post 5.

Within this socket 10, there is neatly yet movably fitted a washer 15, (see detail Fig. 3) and the inner edge of the opening thereof is formed with a lug 18. The washer-opening is unthreaded and is of a diameter to receive the adjusting-post 5, which latter is formed with a longitudinal groove 5", to receive the lug 1S, whereby, as will be obvious, the washer is locked against rotation but yet is free to slide vertically upon the post. The underside of the washer may be provided with a plurality of radiating preferably rounded ribs 17, the same being designed to temporarily engage with corresponding shallow grooves 16, formed in the bottom of the socket 10, whereby, under ordinary conditions, the hand-wheel and the washer are locked.

Above the washer may be located any desired form or construction of stretcher sup porting yoke 11, the one herein shown, being of the conventional pattern, since, such is immaterial to my invention. In this instance, however, the yoke is provided with a central unthreaded opening of a diameter sufficient to snugly receive the adjustingpost, as indicated at4 12, and from one side of the yoke there depends a lug l1, which terminates below the peripheral liange or 110 bead 9 of the hand-wheel, and is provided with a threaded perforation coincident witlA ,Y the underside of said flange or bead, to re washer 15, the lower end of the yoke, there fore, not exceeding` the diameter of th washer. lf desired, as will be perfectly ob-i vious, any ordinary anti-friction devices may be interposed between the lower end of the voke and the upper side of the washer, but such are not believed to be necessary and, hence, are not shown. lf preferred, the yoke may rest on the flange 9.

The operation of the invention will be readily apparent, it being seen that any vertical adjustment may be obtained by simply rotating the hand-wheel 7 so that the same will be fed up or down upon the threaded adjusting-post 5. During such operation, the ribs 17 and recesses 16 of the washer and hand-wheel, respectively, will readily disconnect, such being necessary in the present instance wherein these parts are shown as temporarily locked together, the washer being fed up or down, in accordance with the direction of rotation of the hand-wheel, and with it, so also, is the yoke and the stretcher' and other parts carried by the same, including the chair-seat.

The parts composing the adjustment, it will be seen, are comparatively few, and may be Vmade sufficiently heavy and strong to endure continued and long service. j The device is readily manipulated and the handwheel thereof is immediately locked by the immovabley or non-rotatable washer in any position it occupies upon release. Finally, the undesirable looseness occurring after use between the adjusting-post and chair-base is eliminated, the leverage, caused by the weight of the person occupying the chair, being transferred from the lower' to the upper end of the screw, and being shortened, is thereby reduced to a very great degree.

Having described my invention, what claim, is:

1. In a tilting-chair, the combination of a base, a iiXed adjusting-post rising therefrom and rigid therewith and provided above the base with threads and a longitudinal groove, a hand-wheel threaded on the post, washer encircling -the post above the wheel and having a lug engaging the groove in the post, and a stretcher-yoke having an opening receiving the post and rotatable and adjustable thereon, and seated on the washer.

2. In. a, tilting-chair, the combination of a base, a fixed adjusting-post rising therefrom and rigid therewith and provided above the base with threads and a longitudinal groove, a hand-wheel threaded on the post, a washer encircling the post above the wheel, means for temporarily locking the two together in a detachable manner, said washer having an internal lug engaging slidably with the groove in the post, and a stretcher-yoke having an opening receiving the post and rotatable and adjustable thereon, and seated on the washer.

3. ln a tilting-chair, the combination'of a base, a fixed adj listing-post rising therefrom and rigid therewith and provided above the base with threads and a longitudinal groove,

la hand-wheel threaded on the post, a washer encircling the post above the wheel, means for temporarily locking the two together in a detachable manner, said washer having an internal lug engaging slidably with the groove in the post, a stretcher-yoke having an opening receiving the post and rotatable and adjustable thereon, and seated on the washer, and means for locking thel stretcheryoke and the hand-wheel together whereby to permit of independent rotation yet prevent longitudinal separation.

1. In a tilting-chair, the combination of a base, an adjusting-post rising therefrom and provided with threads and a longitudinal groove, a hand-wheel threaded on the post, a washer encircling the post and having a lug engaging the groove of the post, means for temporarily and detachably locking the washer and hand-wheel together, and a stretcher swiveled on the post and vertically adjustable by the hand-wheel.

5. Ina tilting-chair, the combination of a base, an adjusting-post rising therefrom and provided with threads and a longitudinal groove, a hand-wheel threaded on the post, a washer encircling the post and having a lug engaging the groove of the post, removably interlocking lugs and grooves formed on the meeting faces of the hand-wlieel and washer, and a stretcher swiveled on the post and vertically adjustable by the hand-wheel.

6. ln a tilting-chair, the combination of a base, an adjusting-post rising therefrom and provided with threads and a longitudinal groove, a hand-wheel threaded on the post and provided on its upper side with radial shallow grooves, a washer encircling the post above the hand-wheel and engaging the groove of the post and provided on its underside with ribs removably engaging the grooves of the hand-wheel, and a stretcher swiveled on theV post and vertically adjustable by the hand-wheel. n

7. In a tilting-chair, the Vcombination of a base, an adjusting-post rising therefrom and provided with threads and a longitudinal groove, a hand-wheel threaded on the post, a washer encircling the post and having a CIK lug engaging the groove of the post, said washer being located above the hand-wheel, means for removably locking the washer and hand-wheel together, and a stretcher swiveled on the post and supported by the washer.

8. In a tilting-chair, the combination of a base, an adjusting-post rising therefrom and provided with threads and a longitudinal groove, a hand-wheel threaded on the post, a washer encircling the post, and engaging the groove of the post, means for removably locking the washer and hand-wheel together, a stretcher swiveled on the post and adjustable by the hand-wheel, and means for removably engaging the hand-wheel with the stretcher whereby they are locked against vertical separation and yet capable of independent rotation.

9. In a tilting-chair the combination of a base, a fixed adjusting-post rising therefrom and provided above the base with threads and a longitudinal groove, a hand-Wheel threaded on the post and having on its upper side an annular Iiange forming an annular recess about the post, the bottom of the recess having radiating shallow grooves and the upper edge of the flange'having a peripheral surrounding bead, a circular Washer itting loosely Within the recess and provided with an internal lug engaging the longitudinal groove of the post and upon its underside with shallow ribs corresponding to and removably engaging the grooves of the hand-wheel, a stretcher-carrying yoke loosely mounted on the post above the handwheel and washer and free to rotate and vertically adjustable on the post through the rotations ,of the hand-wheel, a lug depending from the yoke below the peripheral rib of the liange of the washer and provided with a threaded perforation, and a screw threaded in the perforation and at its inner end engaging under the said peripheral rib.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HARRY W. BOLENS.

Witnesses:

OLAF ETTON, A. R. BOERNER Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of' Patents, Washington, D. C.

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