US104851A - Improved folding chair - Google Patents

Description

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Letters Patent No. 104,851, fla-tell June-28, 1870.

IMPROVED FOLDING- CHAIR.

The Schedule referred to in these Lettera Patent and making pm of the same.V

To all persons to whom these presents may come:

Be it known that I, FRANCIS M. HOLMES, of Boston, of the county of Snolk and State of Massachusetts, have invented a new and useful Improvementin Folding Chairs; and do hereby declare the same to be fully described. as follows, reference being had to the accompanying drawing, of which Figure 1 is a top view,

Figure 2, a side elevation, and

Figure 3, a vertical section of a folding chair provided with my invention, the back and seat vbeing exhibited as not upholstered.

Figure- 4 represents a front elevation, and

Figure 5, a side or edge view of the chair as it appears when folded, it being represented in the other iguresas extended or unfolded, and with its parts in position for the chair to be used by a sitter.

The purpose of my invention is to alord a strong support for the seat when the chair is extended, as well as to obtain other advantages.

In this chair, the legs and the side hars of the back are formed by four leversA A', kB B'.

Each of the shorter levers B B' crosses one of the back or longer levers A A', the two at the crossing being pivoted together, or connected by a fulcrum or joint-pin, a., going through one, and into the other, or through both, if preferable.

The shorter levers are arranged outside of the longer levers, and are connected hy two rungs or crossbars, b c. i

The seat or seat-frame, shown at. .0, is fastened upon-a shaft or bar, d, which is pivoted to the shorter levers B B', or has journals to rest and revolve thereon.

Such s eat also rests on a round support-bar or rung, e, whose ends are sustained by projections, ff, extended from the larger levers, in manner as represented, and having the distance of its top from the fnlcrums of the levers equal to or a trifle less than the distance of the seat pivotal bar from suchfulcrums.

' The employment of the projections f f for supporting the rest-bar c is important and essential, as without them, or were the rest-bar e to extend from one longer levervto the other, it will be seen that the pivotal bar, when the shorter levers are outside the longer ones, could not be broughtl up over the restbar e, so as to allow the seat 4to fall down oven and against the back of suchbar e.

The projections' f f carry the bar e so far forward of thelonger levers as to allow the seat, when the pivotal bar is against them, to fall down over and against the rest-bar, and between the longer levers.

Furthermore, the two longer levers are connected, near their lower ends, by means of a rung, g, and also at or near their upper ends and middles by two other rungs or bars, h i, fastened to projections, It l k l, ex-

tended froni such levers, the whole being arranged'in manner as represented in the drawing.

lh`e two rungs hy t' compose part of the back frame, and may be connected by bars or frame-pieces m m.

The vseat is furnished with one or more hooks, n n, to extend from its rear part, and hook upward around the middle rung t of the longer levers', the seat, also, (or a projection therefrom,) when horizontal, or when the chair is extended, bringing up and lbearing againstA thesaid rung.

From the above,- it will be seen that, in folding the chair, the seat will slide on and turn downupon the rung c of' the longer levers, and, finally, will be caused to assume the positions exhibited in figs. 4

with the back support-bar of the seat, as means of stopping or arresting the seat, andthe movements of the crossed levers. I therefore make no claim to such.

The stops iu my chair exteudabove the seat, and

d consist of the run t' and the hooks a a, the said rung notonly serving as a stop, buta support for the seat, to prevent it from being thrown upward at its rear by a person while sitting upon the front part of the seat.-

The said rung also composes part of the back-frame. The chair .made in manner as above described, and

as represented in the accompanying drawing, possesses great stability and strength when extended.

.In the chair above described, the seat is not hinged to the tops of the shorter levers, nor are these shorter vlevers arranged between the longer levers, but are disposed outside of them.

This arrangement enables the shorter levers toV be extended above the pivots of the seat, s o as to form supports for arm-rests or bands which are to be 'ex tended from the heads of the shorter levers up to those of the upper cross-bar of the longer levers.

Having the shorter levers' outside of the longer ones renders a chair more stable than one having its shorter levers disposed between the longer ones.

I do not herein claim the folding chair having its seat C pivoted to its shorter -pair of levers B B', and having a sustaining-rung, e, applied to the longer levers, the arrangement and combination of the connecting-stretchers or bars b 'c'fwth the said shorter levers and their fulcrums, the shorter levers being :irranged with the longer levers, as explained. Y

What I do herein claim'as of my invention is :is follows:

The improved folding chair= as made with the shelter' levers B B', and longer levers A A', seat-sup port bar e, projections fj; pivot'ed bar d, seat C, one or more hooks, n n, and bearing-rung i, when all the partsl are constructed and arranged to operate as hele inbefore described.

' F. M. HOLMES. NVitnesses R. H. EDDY, J. R. SNOW.

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