US248656A

US248656A - Chair

Info

Publication number: US248656A
Authority: US
Publication date: 1881-10-25
Anticipated expiration: 1898-10-25

Description

(Model.)

B. E. KOKEN 85 L. BOPPERT.

CHAIR.

No. 243,656.. Patented (lot. 25,1881.

IINrTED STATES PATENT Prion.

ERNEST E. KOKEN AND LOUIS BOPPERT, OF ST. LOUIS, MISSOURI.

CHAIR.

SPECIFICATION formingpart of Letters Patent No. 248,656, dated October 25, 1881,

Application filed December 13, 1880. (ModeL) To all whom it may concern:

Be it known that we, ERNEsr E. KoKEN and Lotus BOPPERT, residents of St. Louis, Missouri, have made a new and useful Improvement inOhairs, of which the following is a full, clear, and exact description, reference being bad to the annexed drawings, making part of this specification, in which- Figure 1 is a side elevation of the improved chair Fig.2, a sectional elevation of the chair, the seat and foot-rest beingin section, and the parts being as when the chair-back is inclined from its upright position; Figs. 3, 4, 5, 6, details, being respectively a side elevation of a portion of the locking mechanism, a plan of the last-named part, a cross-section taken on the line 00 0c of Fig. 3, and a side elevation of one of the slides and Figs. 7, 8, diagrams indicating the movement of the chair-back as it is moved to and from an upright position.

The same letters denote the same parts.

The present invention is an improvementiu chairs having adjustable backs and foot-rests.

It relates partly to the manner of hinging or pivotingthe chair-back, and partly to the mechanism used in looking the foot-rest and back at any desired inclination.

Referring to the drawings, A represents a chair having the present improvement, and which, saving the improvement, may be of any of the ordinary forms.

B represents the chair-back O, the arm; 1), the seat, and E the foot-rest. The back is pivoted at b. The arms, at their rear ends, are hinged to the back at points above the pivots b l), and at their forward ends are jointed to the levers F. The levers are pivoted to the chair atf, and support the foot-rest which is attached to the lower ends of the levers. The back and rest being thus connected move together. As the back is inclined the rest is raised,and as the backis raised therest drops back into avertical position.

A prominent feature of the improvement is the peculiar arrangement of the back-pivots.

Asjnclinin g-back chairs have heretoforebeen made the back-pivots have been arranged at the lower end of the back and in line with the top and .back edge of the chair-seat; or, if the pivots are forward of the front of the back, they are level with the top of the seat; or, if

above the seat, they are even with the back. Thus made, when the chair-back is inclined the back of the occupant must necessarily slide upon the chair-back, for the body of the occupant turns upon an axis in line with the hipjoints, which are several inches above the chair-seat and several inches in front of the chair-back. Further, after the chairback has been moved the occupant must shift his position in the chair to bring his back throughout its length against the chair-back.

To obviate these difflculties, and to provide a more comfortable chair, and enable the back of the occupant and back of the chair to move together, so that the one shall not slide upon the other, and so that the occupants back is supported throughout its length as the chairback is turned up and down, is the aim ofthis portion of the improvement, which consists in arranging the back-pivots so as to coincide with the axis passing through the hip-joints of the occupant of the chair. In practice the position of the hip-joints is about five inches above the seat, and the same distance in front of the chair-back.

To this end the back B is furnished with arms I) l), which extend forward of the back, and are pivoted to the standards G G. The latter stand up from or are made part of the chairframe, and, together with the arms I) b, are so proportioned and extended as to bring the pivots b b in the desired positions. Then as the chair-back is moved upon its pivots the occupants back follows the chair-back without falling away therefrom or sliding upon it. The movement is indicated by the diagrams in Figs. 7, S, where B indicates the chair-back, D the seat, and l) the position of the back-pivots. It will be seen that the length of the dotted line 3 is constant in all positions of the chairback.

To provide an improved locking mechanism by which the foot-rest and back can be readily locked and unlocked in any position in which they maybe placed is the aim of another feature of the improvement.

The locking mechanism consists, mainly, of two similar parts, H H, one of which is (and by any suitable means) immediately connected with the foot-rest E, and the other with the seat I), and the two parts H and H are connected 5, to conveniently keep the slide in place.

together by the rod I. One of these parts H or H is shown upon a larger scale in Figs. 3, 4, 5, 6, and consists, as follows, of a baseplate, K, having a slot, k, extending longitudinally therein, in which a slide, L, is arranged to move, the sides of the slot being beveled and the slide made tapering, as shown in I pig.

he slide is furnished with a stud, l.

M represents alocking-plate, having a series of perforations, m m m. It is held against the plate K, and by means of the arms m m, which are hinged to the plate K at m and to the plate M at m-", can be moved evenly to and from the plate K. When against the latter the stud l engages in one of the perforations m m, and while the stud is thus engaged the slide L is held from moving. To unlock the slide the plate M is lifted slightly from the plate K. This, in the case of the mechanism attached to the foot-rest, is effected by the pedal N. The latter is hinged at n to the foot-rest, and it is furnished with an arm, n, the upper end of which, at a, is jointed to the plate M. By pressing the pedal N, which can conveniently be done with the foot, the plate M is lifted and the slide unlocked. A spring, n depresses the plate M as soon as the pressure on the pedal is removed.

The part H upon the chair-seat is similarly constructed, the only difference being that the rod 0, by which the plate M is lifted from the plate K, extends laterally to the right and left from the part H to and through the sides of the chair-seat, as seen at 0, Fig. 1. By lifting the rod at 0, which can be done readily with the hand and at either side of the chair, (the bearing at the opposite end of the rod for the time being serving as the fulcrum for the rod,) the plate M is disengaged, leaving the slide L of the part II free to move to and fro in the plate K. A spring, 0, acts through the rod 0 to depress the plate M as soon as the pressure upon the rod 0 is removed. The rod I is connected with the slides L L.

The operation of this feature of the improvement is as follows When the occupant desires to change the position of the chair-back and foot-rest with his foot he presses against the pedal N. This leaves the foot-restfree to move. Pressure backward on the back B then brings the partsinto the desired position-forinstance, as in Fig. 2. The pressure upon the pedal is then removed, whereupon the slide L becomes locked and the foot-rest and back fastened in that position. v

When the occupant desires to operate the chair with his hand, as when the occupant is a child who cannot conveniently reach the pedal, the rod 0 is raised by lifting it at o, whereupon the slide L in the part H is free to be moved, enabling the foot-rest and back to be moved as desired, and, when adjusted, to be fastened by releasing the rod O-that is, when the slide L in the part H is moved the rod I turns upon the slide L as a pivot, and when the slide L is moved the rod I turns on the slide L.

' It will be seen that the seat D is fixed.

e claim- 1. The combination, in achair, of the pivoted back B, arms 0 (J, levers F F, foot-rest E, plates K K, slides L L, plates M M, arms m n, springs n 0, rod 1, pedal N, and rod 0, substantially as described.

2. The combination, in the chair A, of the plate K, having the slot shown, the slide L, having the stud z, the perforated plate M, the spring 0, and the rod 0, substantially as described.

3. The combination, in the chair A, of the foot-rest E, the slotted plate K, the slide L, stud z, the perforated plate M, the spring M, the arms m n, and the pedal N, substantially as described. M

4. The combination ofthe plates K K, slides L L, plates M M, rod I, foot-rest E, and seat D, substanially as described.

5. The combination of the slotted plate K, slide L, having the stud l, and perforated plate M, having the arms m m, substantially as and for the purpose described.

6. In a chair having an adjustable foot-rest, E, the arm I, said arm at one end being jointed to a part attached to said rest, and at the other end being jointed to a part attached to the under side of the chair-seat, said parts upon the rest and seat, or upon either the rest or seat, being arranged to slide thereon to enable the arm to follow the movement of the rest, and hold and brace it at any desired angle.

ERNEST E. KOKEN. LOUIS BOPPERI.

Witnesses:

O. D. MOODY, SAML. S. BOYD.