US99441A - Improved chair-bottom - Google Patents

Description

tstrd mes strat @Wire Letters Patent No. 99,441, dated February/.1, 1870.

IMPRovED CHAIR-BOTTOM.

The Schedule referred to iu these Letters Patent and making part or the same 10 all whom tt'may concern:

Be it known that I, PLATT C. INenRsoLL, of Green Point, in the county of' Kings, and State of New York, have invented a new and useful Improvementin Chair- Bottoms, of which 'the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, and in which- Figure 1 represents a vertical section of a chair with v,my improved bottom applied thereto, and

Figure 2, an inverted plan ofthe seat-portion ofthe chair, in illustration of said improvement.

Figure 3 is a vertical section, through one of the looped metal braces used in the construction of the improved chair-bottom, showing the connection of said brace with the spiral spring and interposed rubber bar.

The invention consists in a novel combination and arrangement ot' a central spiral spring, -looped metal braces connecting said spring, at its upper end, with the chair frameand lower metal straps, on which the spring is made to rest, whereby a steady and effective spring-like action is secured to the cushion, and the spring is restrained from shutting down, so asto injure it or produce discomfort to the occupant ot' the chair; and the invention, in such connection, includes a combination with said spring and metal braces, of rubber bars or strips, arrauged'within the loops ot' the braces, and interposed between them andthe spring on its outside, to secure a steady action of the braces and spring, and to take Jup lost motion consequent on the play ot' the braces.

Referring to the accompanying drawing- A represents the seat-portion of theframe of the chair, and B, a cushion arranged thereon, and which is supported through the open seat-frame by a cen- Siniilar letters of reference indicate corresponding trally-disposed spiral spring, G, of tapering construction, and diminishing in diameter in a downwardly direction, said spring cent1-ing in and resting, at its lower end, on metal straps D D, secured at their ends to the chair-frame, and serving to brace the latter, while the upper end of the spring is Vsteadied, and an extended bearing-surface, in connectionwith it, secured to the cushion, by means of metal braces E E E E, fastened at their outer ends to the seat-trame, preferably at its corners or angles, and connected at their inner ends by loops (L a t u, with the upper coil ofthe spring, so that on pressure being brought to bear upon the cushion, the strain will be communicated through the braces to the spring, and 'the latter besteudied by the braces which play with the spring, and ease its action, also prevent/it from shutting down, so'as to endanger breakage or produce discomfort to the occupant ot' the chair.

To render more perfect the connection. of the braces with the spring, and take up thelost motion consequent upon the play of the ends of the braces relatively tothe movement of the spring, I interposc withineach loop a., between it vand the out-er edge of the upper coil ot' the spring, a bar or strip, b,` of India rubber, which serves to soften the action ofthe brace, and prevent jar or rattle.

What is here claimed, and desired to loe secured by Letters Patent, is-

1. The combination and arrangement, substantially as specified, of the metal braces E E E E, formed with loops c a d a at their inner ends, the spiral spring C, and the metal straps D D, with the chairirame or seat.

2. The arrangement of rubber bars or strips b within the loops a ot' the braces E, in combination with the spring C and metal straps D, essentially as shown and' described.

P. C. INGERSOLL. YVitn esses:

' FRED. HAYNES,

R. ERABEAU.

Images