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Publication numberUS308921 A
Publication typeGrant
Publication dateDec 9, 1884
Publication numberUS 308921 A, US 308921A, US-A-308921, US308921 A, US308921A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 308921 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)



Patented Dec. 9, 1884..


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SPECIFICATIQII forming par; of Letters Patent No. 308,921, dated December 9, 188%.

Application filed January 18, 1884. (No lllOlltlJ T0 aZZ whom, it may concern:

Be it known that I, HENRY W. MoVrcAn, a citizen of the United States, residing at \Vinchester, in the county of Frederick and State of Virginia, have invented certain new and useful Improvements in School-Furniture, of which the following is a full, clear, and exact description.

This invention is designedv specially for school-furniture, so called, and its object is to provide capabilities of adjustments in such furniture, whereby work or exercise and study may be facilitated by the adaptation of the furniture to the size, position, and purposes or needs of the user.

The invention is applicable in part to other than schoohfurniture, such as desks generally and draftsmens tables.

The invention consists in the combination and arrangement of parts, as hereinafter particularly set forth and claimed.

In the accompanying drawings, illustrating my invention, in the several figures of which like parts are similarly designated, Figure l is a side elevation of a combined desk and seat embodying my invention. Fig. 2 is a central vertical section of the same from front to rear. Fig. 3 is a face, view on a larger scale of a friction'pad used in the joints of the legs to aid in holding them in adjusted position. Fig. 4. is a section on the scale of Fig. 3, taken in the planes of line at as, Fig. 1; and Fig. 5 is a partly-sectional view in the plane of line y y, Fig. 1.

I11 constructing my desk I employ pairs of crossed legs a b, said legs being secured at their intersections by superficially roughened, rayed, or otherwise friction-surfaced plates 0, interposed between the two legs of each pair at those points, and screws 0,thumb-11uts f, and washers g, which plates, screws, nuts, and washers constitute friction clamps, and of which there are many well-known and common forms and equivalents. The legs a in use will be pivotally fastened at their lower ends, as by angleplates 71, secured to the door, and on which the legs may move as upon a pivot. The legs I) will be held by the friction-clamps in any position that may be given. The pairs of legs are united by a book-receptacle, t, fixed to the legs a.

To the upper ends of legs a b are jointed armsj k, respectively, and these arms at their other ends engage longitudinally-slotted bars Z, depending transversely from the under side of the top at of the desk. The engagement of the arms j It with these slotted bars is rendered adjustable by means of screws 12, fast in said arms, extending through the slots in said bars, and engaged by tliumb nuts 0, suitable frietion-washers, p g, being interposed between the nuts and bars and bars and arms, respectively, to make a secure fastening. These bars may be notched or roughened, as at Z, to insure the fastening.

The seat is composed of a back, r, having lugs 8 near its head, pivoted to the upper ends of legs a a, and at its bottom provided with arms 2, slotted and notched substantially as shown, and engaged by setscrews u with the legs 6, and to this back is separately pivoted or hinged the folding seat '0, of approved con struction. By loosening the jointing-clamps of the crossed legs the ends of the said legs may be moved toward or from each other, to thereby increase or diminish the height of the desk, and in this movement the seat will participate. Now, as the seat attached to one desk is occupied by the user of the desk in front, and as it may be undesirable to raise or lower such seat beyond a given height, I have provided for a separate adjustment of the desktop to accommodate the user of the desk, so that if the seat is to be high the full adjustment of the seat may be had and the desk top lowered by the arms j 7c, as indicated by the brokenlines, Fig. 2. So, also, if the seat is to below, the desk-top is raised by the arms j R, as in full lines, Fig. 1, and the elevation of the desk-top may be varied by the scholar to any extent between its two limits just noted 5 but the movement of the legs of the desk should be under the control of the teacher or other authority. Furthermore, by lowering the arms ]t' various inclinations of the top may be secured for drafting or other purposes, as indicated in broken lines, Fig. 1.

By changing the point of engagement of the notched arms t with the screws to, the seat may be swung on its pivotal connectionswith the legs a toward or from the legs, and so decrease or increase its height and vary its inclination.

I have shown screws as the means for jointing some of the parts; but, as is obvious, the

most suitable known jointing devices will be employed.

What I claim is- 1. The combination, with the connected seat,

desk-top provided with slots, and pairs of between the legs and desk-top and forming the joints between them, and admitting of the independent adjustment of the desk-top as to its height and angle, and the adjustable arms t, connecting the pivoted seat with the legs to provide for the separate adjustment of the inclination of the seat, substantially as shown and'described.

with the legs I) by adjustable arms, as and for the purpose described.

3. A desk-top having side slots and its pairs of crossed legs provided with clamping devices at their intersections to hold them in adjusted position, combined with arms j k, jointed to and connecting such top and legs, and clamping devices to secure the said arms in adjusted position to the desk-top to vary the height and angle of the top, substantially as shown and described.

4. The combination, with the desk and adjustable legs, of the seat pivoted to the said legs at their upper ends, and arms t, and fastening devices connecting the seat at its lower end through said arms with the desl -legs, to permit the change of inclination of the seat independently of the adjustments of the desk, substantially as shown and described.

In testimony whereof I have hereunto set my hand this 17th day of January, A. D. 1884.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5601014 *Jun 28, 1995Feb 11, 1997Vestil Manufacturing CompanyLift and tilt table
Cooperative ClassificationA47B39/00