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Publication numberUS268616 A
Publication typeGrant
Publication dateDec 5, 1882
Filing dateDec 15, 1880
Publication numberUS 268616 A, US 268616A, US-A-268616, US268616 A, US268616A
InventorsHenry E. Brown
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable table
US 268616 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)


Patented Dec. 5, 1882..





SPECIFICATION forming part of Letters Patent No. 268,616, dated December 5, 1882.

Application filed December 15, 1880. (ModeL) To all whom it may concern:

Be it known that I, HENRY E. BROWN, of Lansing, Ingham county, State of Michigan, have invented a new and Improved Adjustable Book-Support; and I do hereby declare that thefollowing is a full, clear, and exact description of the same.

The object ofmyinvention is to provide anew and improved adjustable book-support which.

can be attached to a chair, table, or any projection'of a piece of furniture, can be adjusted higher and lower, and to have any desired inclination.

The invention consists in the peculiar construction and arrangement of parts, as hereinafter more fully set forth.

1n the accompanying drawings, Figure 1 is a side elevation of my improved book-support, showing the manner in which it is attached to a chair or other object. Fig. 2 is a longitudinal sectional elevation of the device for holdingthe table in the desired position. Fig. 3 is a plan view of the same. Fig. 4 is a [ongitudinal elevation of the pawl-arm and clamparm of the device.

An inwardly-flanged ring, H, is fastened to the under side of the table B, and an annular flange of the top plate, I, of the lugs J J fits into the space betwecnthe under side of the table B and the upper side of the flange of the ring H, as shown in Fig. 2, thus permitting the table to be turned on the top plate, I. A shaft, 0, passing transversely through a segmental rack, D, on a rod, E, is also pivoted in the lugs J J. A sliding latch,K, with a wedgeshaped tooth, L, on the under side and lugs a a at the ends, is mounted in the top plate, I, directly below its flange. Aspiral spring, M, acts upon this latch, drawing the tooth L into the teeth of the segmental rack D. A flanged bar, N, is provided with teeth I) I) on the inner sides of the flanges, as shown in Fig. 1. A pa wl-arm slides up and down on this bar N ,and can be held at any desired height. The rod E passes through two guide-rings, P, of the bar N, and its lower end rests upon the pawl-arm 0, as shown. The pawl-clamps Q and Q slide vertically on the bar N, and can be held at any desired height in the samemanner as the pawlarm 0, for they are also provided with the fulcrum-lugs c 0; but on the arm Q they are on the lower edge, as this arm receives an upward pressure but on the arm Q they are on the upper edge, as this edge is pressed downward. A screw, R, passes through the lower clamp-arm, Q and by means of these arms Q and Q and the screw R the double ratchet,

bar N is attached to tables, chairs, or projecting parts of any other piece of furniture.

The sliding latch K is drawn in the direction of its length in order to disengage the tooth L from the segmental rack D, upon which the board B is inclined, as may be required, and the latch K is then released and engages the tooth L with the segmental rack D, again thereby locking the table orhoard B in the inclined position. As the annular top plate, I, fits loosely in the flanged ring H, the board or table B-can be turned on this top plate, I. The pawl-arm 0 is raised more or less as the circumstance may require, and the pawl-clamps Q or Q are-also adjusted higher or lower on the bar N, as may be necessary, and then the same are fastened to a chair, table, or any other suitable projection by means of a screw, It. The board or table can thus be adjusted at any desired height or inclination with the greatest care and in a very short time, and

will always be held firmly.

I am aware thata desk has been provided with a springpawl on its under side to work in a rigid rack on the desk-standards; but

What I claim as new is-- 1. In an adjustable table, the combination,

firmly secured at any angle, substantially as described.

2. In a book-support, the combination, with the flanged bar N, provided with the guides P P, and with teeth on two opposite sides, of 5 the vertically-adjustable pawl-clamps Q and Q the screw R, the vertically-adjustable pawlarm 0, the rod -E, and the table B, pivoted to the top of the rod E, all substantially as herein shown and described, and for the purpose set forth.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2710051 *Jun 26, 1953Jun 7, 1955Gerald GreenbergTable attachment
US2753742 *Jul 20, 1953Jul 10, 1956Buchanan Electrical Prod CorpHand tool for crimping electrical connectors
US2769607 *Nov 12, 1952Nov 6, 1956Thompson Herbert LFly-tying vise
US3841609 *Mar 17, 1972Oct 15, 1974Smith MPerimeter guard rail system
US4124240 *Sep 1, 1976Nov 7, 1978Roy AdelbergAuto trunk lid holder
US5803420 *Mar 13, 1996Sep 8, 1998Cormark, Inc.Universal sign mounting device
US5933992 *Mar 24, 1998Aug 10, 1999Cormark, Inc.Cam locking sign mounting system
US5934633 *Mar 24, 1998Aug 10, 1999Cormark, Inc.Pivotal, two-position locking sign mounting system
US6079081 *Nov 18, 1998Jun 27, 2000Cormark, Inc.Door mount assembly for storage rack
US6108956 *Apr 3, 1998Aug 29, 2000Cormark, Inc.Tri-mount sign system
US6434871Apr 12, 2001Aug 20, 2002Cormark, Inc.Shelf-mount sign system
US6470611Mar 24, 1999Oct 29, 2002Cormark, Inc.Two-position vertically adjustable sign
Cooperative ClassificationA47B23/046