US116590A - Improvement in reversible seats - Google Patents

Description

PATENTED JUL -41871 UNITED Srarns armar V Grrrcn.

FRANK M. HAVVKINS, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN REVERSIBLE SEATS.

To all whom it lmay concern:

Be it known that I, FRANK M. HAwKINs, of Indiana-polis, in the county of Marion and State of Indiana, have invented certain Improvements in Seats for Railroad Cars, Churches, Schools', te., ot' which the following is a specification:

My invention relates to the combination ot an oscillating seat with a reversible bach, through the intervention of a cam and cam-rods, so that whichever side the back is occupying that edge of the seat is forced down for the time being, and the opposite edge is raised in a corresponding degree, and the eiiect is always to have the front part of the seat a little `higher than the rear part ofthe same, thereby obviatin g all tendency to slide torward and ott ot' the seat.

Figure l is a front perspective view of a seat with my invention a-pplied. Fig. 2 is an underside view of one end of Fig. l. Fig. 3 is an elevation of one end piece ot' a seat with the working parts thereof exposed to view, showing the back to the right, and Fig. 4 is the same as Fig. 3, but showing the back to the left side.

S is the seat. B is the back 5 E, the ends of' a seat, and b, the swinging bars connecting the back with the end pieces E. J is a vibrating base, one at each end ofthe seat S, and connecting the seat to the upright ends E by means of a lixed 'ulcrum, upon which they rock or oscillate. These may be made of cast-iron or any other suitable material. They have a right-angled flange, through which screws pass, securing them to the under side ofthe seat S, Fig. 2. They are fulcruined in their middle to a pin or bolt securely tixed on the inner tace of the upright ends E. These oscillating base-pieces J are provided with slots at each end, in which a pin plays that is fixed in the lower end of each cam-rod It. These cam-rods may be made straight, or they may be semicircular in shape. If they are semicircular there is no necessity of having slots in the ends of J, only a pin-hole being necessary. The reason is obvious. The cam-rods It may be gained into the face of E, or they may lie on the surface. If the latter, they ought to be covered with a housing of sheet metal, crimped or stamped into shape. The cam-rods It converge until their upper ends almost meet, and rest snugly against the edge of cam U. This prevents any surplus motion in the seat S. Cam C is let into a circular recess in the face of E. It is an oblong oval, and is firmly secured in the end of seat-bar b and in end piece E by a squareended bolt, the outer end ot' which bolt rotates in plate P2, and its inner end in plate P1. (See Fig. l.) When back B is in position the cam C stands perpendicular, as seen in Figs. 3 and 4 and by the dotted lilies in Fig. l, and the lower end ofthe cam is in contact with the upper ends of the cam-rods It. It' back B is rotated to the opposite side of the seat the cam sweeps over with it and reverses the position of the cam-rods by pressing down y one and allowing the otlierto move up in the same ratio, thus rocking the seat S in the opposite direction. By moving the lower ends of canti-ods It further apart or closer together a lesser' or greater motion may be given to the oscillation ofthe seat, and its slantback decreased or increased accordingly. It is thus seen that, by this simple device, a seat is always made to slant back from the front edge, and is thereby rendered an agreeable and easy position for rest to the users of the sa-me. The bars b may be made similar to those used on any ofthe common seats with reversible backs. Inasmuch as the upright ends E ca-nnot be lirmly and stit'iy attached to the seat S, it becomes necessary to brace their lower ends securely to each other by means of double braces e and l reaching from one to the other. 011e of these braces should be bifurcated at its ends to hold the end uprights E exactly parallel to each other. The general style and width or length of these seats may be varied, to snuit the fancy of the builder, to any extent, or to adapt them to whatever purpose 'they may be required. The cams C may be cut out of metal, or they may be cast in the exact shape needed. The cam-bars or rods It may be cast, if semicircular; or cut from straight thin iron bars, if straight, as here shown.

I claim- The cam C, as connected with the reversible back B, in combination with an oscillating seat, S, by means of cam-rods It or their equivalent, all as shown and described, substantially, in the foregoing speciiication.

FRANK M. HAVVKINS.

Vitnesses G no. W. ALEXANDER, W. C. SHORTRIDGE.

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