US427570A

US427570A - Opera-chair

Info

Publication number: US427570A
Authority: US
Publication date: 1890-05-13
Anticipated expiration: 1907-05-13

Description

(No Model.)

H. J. HARWOOD.

OPERA CHAIR.

No. 427,570 Patented May 13, 1890'.

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NITED. STATES AT HERBERT JOSEPH IIARIVOOD, OF LITTLETON, MASSACHUSETTS.

OPERA-CHAIR.

SPECIFICATION forming part of Letters Patent No. 427,570, dated May 13, 1890.

Application filed October 18, 1889. Serial No. 327,476. (No model.)

To all whom it may concern:

Be it known thatl, HERBERT JOSEPH 1*! AR- WOOD, a citizen of the United States, residing at Little-ton, in the county of l\;'l.iddlesex and State of Massachusetts, have invented certain new and useful Improvements in Opera- Chairs; and Ido declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Figure 1. is a perspective View of an operachair embodying the invention. Fig. 2 is a transverse vertical section. Fig. 3 is a bottom view of the scat. Figs. 4 and 5 are modifica tions.

This invention relates to what are styled opera-chairs, being chairs or seats more especially designed for theaters or operahouses, where the seats are in rows close to one another.

In United States Patent No. 325,283 there is shown a folding chair which apparently resembles mine, and would seem to be designed to accomplish somewhat similar results; but, as will be hereinafter shown, my device differs materially therefrom.

The present invention relates more particu larly to a folding chair which is in its action automatic-that is, there is no need of using the hands either to open or close it.

In the annexed drawings, the letterA indicates the usual chair-standards, spaced apart and braced by the rear bar a, and having the usual arm-rests a. Just below these armrests there is journaled to the standards A the back B by pins 1), passing through the forward projections b of the castings C, secured to the side edges of the back. These castings 0 pass downward below the back and are curved forward, forming lever-arms. They are spaced apart and braced at their lower parts by the cross-bar D. At its lower ends 0 each leverarm G is pivoted to one end 6 of a link E, and its other end 6' is pivoted to the front leg or brace F of the seat G. This leg or brace F is pivoted at its upper end f to a lug g on the seat, and at its lower end f to .the standard A, or in front thereof, as shown in Figs. 1 and 2. The upper endf of the leg or brace F has the top bearingf and its lower end f is turned outward. On each side, about the middle, there depends from-the seat G a lug g. assing through these lugs are the pivot-bolts h, on the outer ends of which are secured the upper ends h of connecting-bars II. These bars ll have a straight upper portion 71?, forming flat rests on top, and extending therefrom are the angular parts 7L3, which are pivoted at 71; to the lever-arms O. From the inside of the arms ll, near the seat G, there extend pins 7;, about which are encircled the spiral springs K. One end 7;. of these springs K is caught in eyes i on the bars H, and the other end k of the springs K bears loosely against the bottom of the seat G, to the rear of the bars II. Pivoted on the inner ends of the bolts hare the supports L, their free ends Zbein g forked and resting against the pins K, equalizing the strain at these points and locking the nut to the bolt 7b.

In Fig. l is shown a modified way of connectin g the lower ends of the lever-arms O C with the front supports of the seat. Here the links E E are made as continuations of the lever-arms O C.

I11 Fig. 5 is shown still another modification. Here the front supports F F are made with an outward curve a and are provided with curved slots at. I11 the lower ends a e of the lever-arms C C are placed pins 0' c, which work in these slots. It will be seen that all of these modifications form a toggle-like connection at the front of the chair, and where the expression toggle-joint or toggle-connection is used I wish to be understood as meaning all three of the forms shown.

The construction describedfurnishestheseat with two toggle-connections with the backone in front and the other in the rear. The result produced by this construction is that either the seat or the back can be operated by moving the other. Then the chair is in the position shown in Fig. 2, the seat is supported on the rests f the back is forward, and the springs K K relaxed. Upon pressure pancy. K K.

the position shown in Fig. 2.

throw the seat G back into the position shown in Fig. 2.

Instead of operating the chair by taking hold of the back, it is only necessary for a person to sit down on the seat when it is in The seat is forced down into its proper position upon the rests 71 7L2. This action swings the back B backward, so that whether the back or the seat is moved the other part is affected.

Having thus described my invention, what I claim is 1. The combination of the standards A A, the back B, pivoted in the standards and having the lever-arms G O, the seat G, the braces F F, pivoted to the seat and at their lower ends, and the bars H H, pivoted to the seat and to the lever-arms C C, the latter having a toggle-connection with the standards F F, as set forth.' I

2. The combination of the standards A A, the back B, pivoted in the standards and having the lever-arms O C, the seat G, the braces F F, pivoted to the seat and at their lower ends, the bars H H, pivoted to the seat and to the lever-arms O C, and a spring interposed between the seat and the bars H H, the leverarms having a toggle-connection with the standards F F, as set forth.

3. The combination of the standards A A, the back B, pivoted in the standards and having the lever-arms C O, the seat G, the braces F F, pivoted to the seat and at their lower ends, the bars H H, pivoted to the seat and to the lever-arms C O, and links E E between the standards F F and lever-arms C C, as set forth.

In testimony whereof I aitix my signature in presence of two witnesses.

HERBERT JOSEPH HARl VOOD.

Witnesses:

CHESTER M. SYLVIA, ALBERT G. Y. MACADAM.