US173636A - Improvement in oscillating chairs - Google Patents

Description

UNITED STATES PATENT OF ICE.

HENRY HOWSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 'ro HENRY s. HALE, TEMAs KILBURN, J. WARREN HALE, oHENEY KILBURN, AND

WARREN HALE, OF SAME PLACE.

IMPROVEMENT IN OSCILLATING CHAIRS.

Specification forming part of Letters Patent No. 173,636, dated February 15, 1876; application filed December 6, 1875.

' To all whom it may concern:

Be it known that I, HENRY HowsoN, of Philadelphia, Pennsylvania, have invented an Improvement in Spring-Supported Chairs, of which the following is a specification:

Myinvention relates to an improvement in chairs, the seats of which are supported by springs; and the object of my invention. is to so construct a chair of this class that the seat can be turned laterally to any desired position, and can be adjusted vertically.

This object I attain in the manner which I will now proceed to describe, reference being had to the aceompanyingdrawing,'in which Figure lis a side view, and Fig. 2 a front view, of my improved chair, of which Figs. 3

and 4 represent modifications of the invention..

The base A of the chair may consist of a simple circular disk of wood or metal, as shown, or may be made with four short legs, in the usual manner, and to this base is firmly secured the screw-spindle B, the thread of which is adapted to an internal thread in the bar D, the latter being connected by two pairs of springs, G and G, to the seat H.

composed of one bar of steel, bent'to the form shown, the upper straight portions of the bar being secured to the seat H, and the ends beingattached, by any suitable means, to the bar D.

In Fig. l the springs are bent inward and downward from the seat; but they may be constructed and arranged in many dili'erent ways. For instance, the springs may be as shown in Fig. 3, or may be bowed outward, as indicated by dotted lines, the ends being secured to projections 00 on the bar D.

In order to limit the rocking movement of the seat, I secure-to the hub b of the bar, through which the screw-spindle passes, rods (1, connected together and strengthened by a third rod, 0, the frame thus constructed servin g to arrest the seat both during its forward and backward tilting movement. In some cases I may secure arms d, Fig. 4, to the .under side of the seat, one arm arresting the forward tilting movement by coming in con-' tact with the bar D, the other arm, in like manner, limiting the rearward tilting of the seats It will be evident that a chair thus con-.

strueted possesses all the advantages of other chairs with sprin g-supported seats; at the same time the seat can be turned laterally to any desired position, and adjusted vertically on the screw-spindle.

I claim as my invention-'- 1. The combination, in a chair, of a base, A, and screw-spindle B, secured to the same, the bar I) adapted to the said screw-spindle, and

springs GG, serving as mediums for connecting'the bar to the seat H, all substantially as set forth. As shown in Fig. 1, each pair of springs is q HENR HOWSON.

Witnesses:

HARRY HoWsoN, J a,

HARRY SMrrH.

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