US151177A - Improvement in school-desks - Google Patents

Description

tion of the same, reference being had to the the backs of seats which are pivoted to their back, and connecting devices, whereby said UNIT D STAT "f1 y- VVILLIAM PIUIILINGER, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT lN Specification forming part of Letters Patent No. 151,177, dated May 1 January 24, 1874.

aunexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawing is a representa tion of a side view of my school-desk. Fig. 2 is a sectional view of the same. Figs. 3, 4, 5, and 6 are detail views of the same.

This invention relates to novel improvements on school-desks, the backs of which serve as frames. It consists in the construction and novel arrangement of the desk frame, seat,

seat and back can each be made in one continuous piece, bent to conform to the natural shape of the body, and properly strained between the side frames. The invention, finally, consists in the application'of a rubber stop of peculiar form to the pivoted seat-arms, for the purpose of rendering the same noiseless while raising or lowering the seat.

The following is a description of my improvements:

In the annexed drawings, A A designate the two side frames of the desk, which are made of cast metal, and constructed with standards A, to which the seat-arms 'G are pivoted. B designates the top of the desk, which is secured on the frames Aby means of screws passed upward through flanges a. O is the seat-back, which is made of one piece of wood, which is steamed and bent so as to present a convex upper surface and a concave lower surface, which latter terminates at the back edge of the seat D. The seat D, which is also made of wood, is steamed and bent so as to present a convex front surface and a concave back surface.

I thus have a solid seat and a solid back SCHOOb-DESKS.

9, 1874; application filed therefor, which have the same contour as the human body in a sittingposition.

The ends of the back 0 are fitted into grooves which are formed into the back portions of the seat-frame, which grooves correspond in their shape to the shape which it is desired to have the back. The seat-board D is also fitted into grooves '6, formed into the seat-arms G G, which grooves correspond to .the shape it is desired to have the seat maintain.

For the purpose of supporting the back board and the seat-board in their proper positions, I have inserted strap-nuts J, (shown clearly by Figs. 3 and 4.) Each strap-nut J consists of a nut, j, and a concentric hook, j, formed on a narrow strap. The hook j is received into a recess, which is bored into the wood; and the nut j, which is on the oppo site side of the strap to the hook j, receives a screw, 0, which is passed through a lug, b, on frame A, or through a lug, c, on the seat-arm G. The hook j takes a firm hold in its recess (1, and when screw cis tightly set up the parts are firmly held.

In the drawings I have represented two of the above-described fastenings at each end of the seat and back boards but, in practice, a greater number of the fastenings may be employed.

On one end of each arm G, and on its inner side, I form two obtuse angular flanges, 9 be tween which is a tube, g and into the recess thus made Iinsert a centrally-perforated block, g, of indiarubber. (Shown clearly in Fig. 5.) By means of a covering-plate, 72, and a screw, h, I confine the rubber block in its recess. The ends of the block 9 are exposed, so that when the seat is down, as shown in Fig. 1, one end of this block abuts against a stop or lug,

p,- and when the seat is up the other end of the block abuts against a stop or lug, p.

I thus prevent noise when the seat is thrown up or down and, by making the blocks 9 of a diamond shape,truncated, an d confining them to their arms G, as described,these blocks will not slip out of their places under any circumstances.

rrron.

I am aware that seats and backs of schooldesks have been made of narrow slats fitted into grooves made in their respective frames, and confined by means oftie-bolts, and I make no claim to such a contrivance.

What I claim as new, and desire to secure by Letters Patent, is-- 1. The combination, with the grooved side frames of a school-desk, of the short strainingstraps J, having bearings j, and the seat D or back 0, substantially as specified.

2. ,The reversible diamond-shaped centrallyperforated rubber stop-block g, having a bearing at each end, in combination with angular side flanges 9 stops 1) p, and a centrally-arranged tubular lug, 9 substantially as specified;

In testimony thatI claim the above I have hereunto subscribed my name in the presence of two Witnesses.

WVILLIAM P. UHLINGER.

Witnesses:

O. F. MILLER, 11. L BAonoFuER.

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