US631559A

US631559A - Adjustable school seat and desk.

Info

Publication number: US631559A
Application number: US71757199A
Authority: US
Inventors: Byron Clark
Original assignee: C H WOODRUFF Co
Current assignee: C H WOODRUFF Co
Priority date: 1899-05-20
Filing date: 1899-05-20
Publication date: 1899-08-22
Anticipated expiration: 1916-08-22

Description

Patented Aug; 22, I899.

No. 63 l,559.

B. CLARK. ADJUSTABLE SCHOOL SEAT AND DESK.

(Applicatio n filed May 20, 1899.)

2 Sheets-Sheet I.

(No Model.)

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Patented Aug. 22, I899.

B. CLARK. ADJUSTABLE SCHOOL SEAT AND DESK.

(Application filed May 20, 1899.)

2 Sheets$heet 2.

(No Model.)

UNITED STATES PATENT OFFICE.

BYRON CLARK, OF ELGIN, ILLINOIS, ASSIGNOR TO THE C. H. \VOODRUFF COMPANY, OF SAME PLACE.

ADJUSTABLE SCHOOL SE AT AND DESK.

SPECIFICATION forming part of Letters Patent No. 631,559, dated August 22, 1899.

Application filed May 20,1899. Serial No. 717,571. N d l.)

To all whorrt it may concern:

Be it known that I, BYRON CLARK, a citizen of the United States, residing at Elgin, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Adjustable School Seats and Desks, of which the following is a specification.

The object of my invention is to provide a simple, economical, and efficient adjustable school seat and desk; and the invention consists in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of a portion of a school seat and desk constructed in accordance with my improvements and looking at it from the outside; Fig. 2, a similar view looking at the parts from the inside; Figs. 3 and 4, transverse sectional views taken on the lines 3 and 4 of Fig. 2; Fig. 5, a vertical sectional elevation of a portion of the mechanisms taken on line 5 of Fig. 2; Fig. 6, a detail view of aportion of the desk; Fig. 7, a detail view of a portion of the seat and back portions; Fig. 8, a detail view of the cap for confining the adj ustable spirals; Fig. 9, a detail view of the standard, and Fig. an enlarged view of the adjustable spiral.

In the art to which this invention relates it is well known that it is highly desirable to provide a school seat and desk with means by which the seat and desk portions may be adjusted independently and as quickly as pos sible, and to this end my invention is primarily designed. v p

In constructing .my improvements I make a standard or leg portion A of the desired size, shape, and strength to support and hold the other parts in desired positions. A desk portion is slidingly mounted upon bolts 12 which are passed through the holes a a and the elongated slots b b of the desk, which bolts act as guides for the desk. The seat portion C is slidingly mounted upon bolts a, which are passed through the holes a in the standard and through the elongated slots 0 of the seat portion.

The desk and seat portions, as will be seen from the above and an examination of the drawings, are slidingly mounted upon the inner side of the standard, so that they have independent motions. It is therefore desirable that mechanism be provided by which these motions- L1 6., the raising and lowering of the 'seat and desk portions'may be accomplished economically and efficiently and the parts sustained in their adjusted positions. To accomplish this result, the standard is provided with fixed projecting teeth or lugs a and a and the desk and seat portions provided with lugs b and 0, respectiyely, extending inwardly and arranged in the same vertical plane or, in other words, in line with each other vertically. Rotatable spirals D and D are provided and vertically movably mounted in the recessed portions e of the cap E, which cap is secured to the standard by the stove-bolts that form the guides for the desk and seat portions. As will be noticed from an inspection of Figs. 8 and 10, these rotatable spirals are provided with raised portions d, arranged in the form of a spiral and projecting inwardly, so as to engage, as shown in Fig. 5, at one side of their diameters with the fixed teeth on the standard and on the other side of their diameters with the teeth upon the adjustable seat and desk portions. These rotatable spirals are provided with polygonal openings (1, preferably square, extending through the axes thereof, so that a square key may be passed through one and, if necessary, extended long enough to pass through the spiral on the opposite standard of the desk.

In operation the parts are assembled as shown in Figs. 1, 2, and 5, and if it be desired to adjust the seat independently of the desk the key is passed through the opening (1 in the spiral D, the lower spiral. The rotation of the key turns or rotates the spiral, which climbs up on the fixed teeth of the standard, and at the same time pushes the teeth of the seat portion upwardly by its vertical movement and gives it a double velocity in an upward direction on account of the spiral independently moving the teeth upwardly. A reverse rotation lowers the seat, and the same is true as regard the raising and lowering of the desk.

The principal advantage incident to the use of my improvements is that the spiral raises or lowers the seat or desk portion at a double velocity--that is, it raises or lowers it with its own vertical movement and accelerates it on account of the engagement with the spiral. A further advantage is that the teeth engaging the spiral directly above the center thereof prevent displacement of the parts after the necessary adjustment has been obtained.

I claim- 1. In a combined school seat and desk of the class described, the combination of a standard having teeth fixed thereto, a movable portion such as a desk or seat portion slidingly mounted on the standard having teeth fixed thereto, and a rotatable spiral slidingly mounted so as to have vertical movement and engaging with the fixed teeth of the standard and of the movable portion whereby a double velocity is given to the raisin g and lowering of the movable portion, substantially as described.

2. A combined school desk and seat, C0111- prising a standard provided with two sets of teeth arranged in a vertical line, a seat por' tion slidingly mounted on the standard and having teeth thereon arranged in a. vertical line with the teeth on the standard, a desk portion slidingly mounted on the standard and having teeth projecting therefrom and arranged in a vertical line with the teeth on the standard and on the seat portion, a cap portion secured to the standard and provided with two recesses arranged in a vertical line with each other, a rotatable spiral arranged in each of the recesses and having the teeth engaging with the fixed teeth on the standard and on the seat portion with the fixed teeth on the standard and on the desk, respectively, whereby the rotation of both will raise or lower the desk and seat portions at a double velocity, substantially as described.

BYRON CLARK.

\Vitnesses:

OSCAR JoNEs, J. E. BAKKER.