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Publication numberUS392174 A
Publication typeGrant
Publication dateOct 30, 1888
Publication numberUS 392174 A, US 392174A, US-A-392174, US392174 A, US392174A
InventorsErnest E. Koken
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 392174 A
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Description  (OCR text may contain errors)

(No Model.) 2 sheds-#sheet- 1.


CHAIR. No. 392,174. FdlatentedOot. 80, 1888.




SPECIFICATION forming part of Letters Patent No. 392,174, dated October 30, 1888.

(No model.)

To aZZ whom it may concern:

Beit known that I, ERNEST E. KOKEN, of St. Louis, Missouri, have made a new and useful Improvement in Chairs, of which the following is a full, clear, and exact description.

The improvement relates to revolving, reclining,and combined revolving and reclining chairs.

The features of the improvement will be hereinafter set forth, and be designated in the claims. l

In the annexed drawings, making part of this specification and exhibiting the most desirable mode of carrying out the improve# mcnt,Figure 1 is a side elevation of the upper portion of the chair-base and the parts more immediately therewith connected. Fig. 2 is a vertical section on the line 2 2 of Fig. G. Fig. 23 is an elevation at right angles to that of Fig. Il. and showing nearly the same parts. Fig. 11. is an elevation of the upper end of the loop used in operating the rack-bar. Fig. 5 is a view in perspective of the improved chair, and Fig. G is a horizontal section on the line 6 6 of Fig. 2.

rIhe same letters of reference denote the same parts.

The chair A, Fig. 5, used to illustrate the improvement, is of the type known as barbers chair, the improvement being more especially applicable thereto. By means of it the chair can be readily revolved to expose the occupant to any desired light or to be conveniently reached, and the chair-baek and footrest can be inclined or adjusted as may be needed.

The chair-base B, seat C,baek D, arms EE, and foot-rest F are of a familiar construction and hardly require detailed description, saving to say that the back is pivoted at its lower end, d, to the seat-frame, the foot-rest is, by means of the arms G G, pivoted at j' to the seatframe, and the arms E E at their ends,re spectively, are jointed to the back D and to the extended foot-rest arms, so that when the back is turned downward the foot-rest is turned upward and when the back is raised the foot-rest is dropped.

H, Figs. 1, 2, 3, 6, represents a circular rack attached to the upper end of the chair-base B and perforated centrally, as is also the chair- `base, to receive the spindle I, which depends from the frame .Lto which the scat C is byany suitable means (not shown) fastened, so that when the chair-seat is turned around, the spindle is rotated within the perforation in the rack and chair-base.

7.1, Figs. l, 3, G, represents a dog attached to and rotating with the spindle I, and adapted to engage in the rack H-that is, the dog is pivoted at 7a tov a bracket, k', which in turn is attached at 7a2 to the spindle, and projecting therefrom, as shown, and to enable the tooth k of the dog to drop into the rack, as shown in the full lines in Fig. 1, and thereby hold the chair-seat from turning around upon the chair-base, or to be lifted out of the rack, as indicated by the broken lines, Fig. 1, and thereby leave the chair-seat and upper portion ofthe chair free to be swung around upon the c]1air-base.

The dog is operated by means of the arm L, Figs. 5, 3. This arm is attached toa shaft, Z, that is journaled at Z Z2 in the brackets k Zi", Fig. 3, and is provided with a finger, l, Figs. 1, 3, 6, which works in a slot, k", in the dog. A spring, M, serves to press the finger toward the rear endJs, of the slot, and thereby permit the dog to engage in the rack II; but by throwing the arm Ii forward, as indicated by the broken lines, Fig. l, the dog is disengaged from the rack, for, owing to the shape of the slot and the relative arrangement of the parts, the finger Z", when the arm Lis thrown forward, causes the rear end of the dog to be depressed, as indicated by the broken lines, Fig. 1. After the upper part of the chair has been swung around into the desired position the arm L is released and the spring M acts again to throw the arm and finger back, and thus provide for the engagement again of the dog in the rack.

rIhe raising and lowering of the chair-back and footrest are accomplished as follows:

N, Figs. 1, 2, 5, 6, represents a bar pivoted at its forward end, a, to the foot-rest F, and in its rear end, n', having a series of notches, ai. The bar extends from its point of connection with the foot-rest backward through a loop, O, Figs. 2, 4, 6, which is held and adapted to work upward and downward in the vertical perforation t' in the spindle I. The loop is connected by means of the rod l? with the treadledever Q, and by depressing that lever,


as indicated bythe broken lines, Figs. 2, 5, the bar N is drawn downward, as indicated by the broken lines in Fig. 2, and when it is thus depressed the bar is disengaged from the lng j of the frame .I or spindle I, and the chair-back and foot-rest are free to be adjusted to the desired inclination, after which, by releasing the treadle, the spring R, Fig. 2, is enabled to act and lift the loop and bar N into engagement with the lug j, whereupon the chair-back and foot-rest become fixed until the pedal is again depressed.

A principal aim of this improvement is to so construct and combine the parts used in locking the upper part of the chair to the chair-base as to prevent the upper part from being accidentally unlocked. To this end the construction is such that, whenever any forcesuch, for instance, as occasioned by one leaning against the chairis transmitted backward through the rack to act upon the dogtooth and incline it to jump out of the rack, the dog, at some other point of it, bears in such a manner upon the finger or other part used to move the dog in unlocking it as to tend to force the finger or part in a direction contrary to that for unlocking the dog, and consequently the dog cannot be thus disengaged from therack. To accomplish this end I prefer the means shown.

I am aware that in revolving chairs it is not broadly new to have a hinged foot-rest adapted to be locked in any desired position by means of a racked bar.

I am aware that a chair-base having a sock et with a circular rack surrounding the saine, in combination with a chair-seat having a spindle adapted to fit in the socket and a locking-bolt to engage the rack, is old; also, that a foot-lever connected to a bolt passing up through the chair-spindle and engaging a rack-bar for locking the foot-rest is not new, and that a loopbolt engaging a rack-bar and adapted to engage or disengage the same from a lug has been used to lock a reclining-chair back; but my invention consists in the combination of these devices and the manner in which they are arranged in a single chair.

I claiml. The combination of the chair-base, the circular rack upon the chair-base, the rotating spindle, the pivoted and slotted dog attached to and rotating with the spindle, the arm L, and shaft Z, operating said dog and having the finger l", substantially as described.

2. The combination of the seat-frame, the chair base and rack, the spindle, the brackets 7c Z3, the pivoted and slotted dog attached to and rotating with the spindle, the arm L, and shaft ,journaled in said brackets and having the finger Z, substantially as described.

3. rIhe combination of the circular rack, the chair-base, the rotating spindle, theseat-frame, the brackets, the pivoted and slotted dog, the spring M, operating on the finger l, the arm, and shaft journaled in the brackets 7c l, and finger, substantially as described.

4. The combination of the chair base and rack, the pivoted and slotted dog attached to and rotating with the spindle, and the rotating shaft Z, provided with the iinger l, said finger when thrown forward acting to depress the rear end of said dog, substantially as described.

5. The combination of the foot rest, the notched foot-rest bar, the seat-frame and spindle having the lug j, and the loop O, attached to the rod P, and the trcadle-lever Q, connected to said loop by said rod, substantially as described.

6. The combination of the footrest, the notched foot-rest bar, the scat-frame and spindle having the lugj, the loop, the rod P, connected with said loop, the treadle-lever operating said rod, the spring R, acting upon and lifting the loop and ratchet-bar, and the chairbase, substantially as described.

Witness my hand.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6196630 *Oct 19, 1999Mar 6, 2001Merits Health Products Co., Ltd.Horizontal swivelling angle positioning means for a chair
US7032966Jul 19, 2004Apr 25, 2006Kolcraft Enterprises, Inc.Swivel high chair
WO2011019743A1 *Aug 10, 2010Feb 17, 2011Michael KriegerMotorized bicycle with trainer mode
Cooperative ClassificationA61G2005/125