US112040A - Improvement in folding-chairs - Google Patents

Description

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l H l FRANCIS MARCH HOLMES, OF BOSTON, MASSACHUSETTS.

l Leners Patent No. 112,040, anni Fetruarym, 1871.

IMPROVEMENT in Pomme-climas'.

The Schedule referred to in these Letters Patent and making part of the same.

To all persons to whomtkese presents may come:

Be it known that I, Finnois MARGH HOLMES, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Iulprovement in llolding-Olu'i-irs; and do hereby declare the same to be fully describedin the following speciication, and represented in the accompanying drawing, of whichl 'lhe longer levers B B'lare crossed on the smaller ones C C', and pivoted thereto, the pivotal rod being shown at (L. It goes tlnol1ghbothsets of levers. Furthermore, the longer .levers are disposed between and against or in close contiguity with the shorter levers.

The 4shorter levers are connected by the front supporting-rung E of the seat, and also by another rung, S, the latter being disposed belen' the pivotal rod, such rungs E b being tenoned and firmly fastened in the levers, so as to beiiumovable reihtively thereto.

The longer levers are connected in a similar manner by two rnngs, rt, arranged as' represented, and also by the back 1), disposed between such levers, in manner as shown. i

-ln carrying ont my 'present improvement the real'- most .seat-supporting rnn'g lllhas pivots or joints at its ends to rest in bearings iu or applied to the longer levers;'and,furthermore, it has two short plates or arms, G G, extended from it, :and pibvfoted or hinged at their front ends to the seat, the two seatsupporting 'rangs having their axes arranged at equal distances from the axis of the pivotal har a, the whole being in order that the seat, while falling toward or into a vertical position, shall slide ou and turn over npon and down in frontof the li'ont'rnng ll.

Then the seat is horizontal, or in the posit-ion to receive a sitter, one or more hooks or stops, lI, cxtended down from it, bear' against the front rung, and thus aid in supporting the part-s of the chair iurtheir proper positions for the chair to be used by a sitter.

Figured is 'a top view of the rotary seatsnpporting rung Il', with its journals, and its arms G G, and the hingefplates'a u, each of such arms, in fact, conlposing one leaf of a hinge, which leaf is to be longr enough to project beyond the rung a distance at least equal to the thickness or diameter of the front rung E.

By means ofthe rotary rung F and its connections,

as described, with the seat, I amenabled to dispense with tlireedeaved hinges, and their employment iu manner and with `a rung stationary relatively to the longer levers, as shown and. described in an application for a patent recently tiled in the Patent Olilce by me.

readily enable the arms to lpreserve their horizontal positions while 'the chair may be folded or unlblded, orbe in the actof being either folded or unfolded, the seat in any of its positions deriving its support from the two rungs E F and their connections with it and Athe two sets of crossed levers.

of the two-leaved hinges or arms G (l, extended from `the said rung, and pivoted or hinged to the scat, all substantially as specilied.

Witnesses:

R. H. EDDY, J. R. Snow.4

it M. HOLMES.

The rung F, by being capable of revolving, will`

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