US2247269A - Seat back - Google Patents

Description

June-24,1941. LASHBACKER I 2,247,269 I v SEAT- BACK Filed May 9, 1940 LAshbackmf owu-l.

Mbmegb Patented June 24, 1941 -UNITED STATES PATENT OFFICE SEAT BACK Karl L. Ashbacker, Ludington, Mich.

Application May 9, 1940, Serial No. 334,208

2 Claims.

This invention relates to a seat back adapted to be applied as an attachment to a bench, board or the like upon which a person sits. It is a primary object and purpose of the present invention to provide a device of this character which will furnish -a back against which a person may rest, which is very quickly and easily transportable from one place to another so constructed as to be folded into a small compass and in a form where it may be readily carried by the person who is using it.

A preferred construction embodying the invention is fully described in the following description, taken in connection with the accompanying drawing, in which,

Fig. 1 is a side elevation of the seat back showing it in use.

Fig. 2 is an enlarged side elevation.

Fig. 3 is a perspective View showing the device in use, and

Fig. 4. is a perspective view showing such device folded.

Like reference characters refer to like parts in the different figures of the drawing.

In the construction of the devic of my invention two side rods or bars I are provided, each of which at one end are return-bent in a downward direction to provide open hooks 2. These rods are adapted to be located horizontally and are spaced apart a predetermined distance. To the opposite, or what may be called the rear end of each rod I, a rod or bar 3 is pivotally connected at 4. Said rods or bars 3 in the unfolded condition of the device extend upwardly and incline toward the rear. At their upper end portions they are curved toward each other and formed into inverted U-shaped bends 5, the ends of which are curved toward each other and overlap and are pivotally connected together on a substantially vertical pivot by a pivot pin 6.

Between each of the rods or bars 3 at each side of the back construction, two links I of flat metal are used each pair of links at each of the seat backs being pivotally connected at one end at 8. The opposite ends of the links are pivotally connected at 9 and II] respectively, to the bars or rods I and 3, the points of pivotal connection being between the ends of said bars or rods.

When the seat back is unfolded and in a condition to be applied to a horizontal board or plank, for example of the type used in bleachers at a ball park, or any other similar horizontally positioned board or the like upon which persons may sit, the hooks 2 are connected with the outer edge of such board or plank II the rods I resting horizontally thereon. The rods 3 are turned to an upper rearwardly inclined position in which case the links I are unfolded and form a brace which holds the rods 3 from tilting beyond a predetermined rearward position. A person sitting upon the supporting board or plank I I may lean back against the parts 5 of the seat back and be partly supported thereby.

Such seat back is instantly detachable and may be folded to the small compass shown in Fig. 4. The links I are folded at their pivots 8 to bring the rods I and 3 into substantialparallelism and then each side half of the seat back is folded about the pivot 6 to bring all of the parts together substantially as shown in Fig. 4. The construction is of light weight but is of ample strength to withstand the service to which it is subjected in use. When folded it may be readily carried in one hand and occupies little space and is not awkward to carry in a crowd. The invention is of a very practical and useful nature.

It is defined in the appended claims and is to be considered comprehensive of all forms of structure coming within their scope.

I claim:

1. A construction of the class described comprising, two spaced apart rods adapted to be located horizontally in the same horizontal plane, downwardly xtending hooks opening to the rear at the forward ends of said rods, two additional rods pivotally mounted one at each of the rear ends of the first mentioned rods, said additional rods at their opposite end portions being bent into return U-shaped bends toward each other and having their opposite ends bent toward each other to meet, means pivotally connecting said opposite ends together, and two pairs of links, each pair of the links being pivotally connected together at one end, the other ends of said links being pivotally connected respectively to said first and said second mentioned rods, as specified.

2. A seat back adapted to be applied to a horizontal seat comprising, two spaced apart rods, means at the forward ends of the rods to detachably connect with the forward edge of the seat, two additional rods, one of which is pivotally connected at one end to the rear end of each of the first mentioned rods, said second mentioned rods at their opposite end portions being bent toward each other and having their opposite ends coming together, means pivotally connecting said opposite ends of the second mentioned rods to turn about an axis substantially parallel to the length of said second mentioned rods, and foldable means connecting associated first and second mentioned rods to permit them to be folded together to lie in substantial parallelism and to limit this pivotal movement in the opposite direction, as specified,

KARL L. ASHBACKER.

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