US646835A - Book rest or table. - Google Patents

Description

Patented Apr. 3., |900.

w. H.l JAcKsoN. 300K REST 0R TABLE.

(Application led Jan. 24, 1900,)

(un Mddel.)

Illlllllllllll UNITED STATES PATENT OFFICE.

WILLIAM H. JACKSON, OF WATERBURY, CONNECTICUT.

BOOK REST OR TABLE.

SPECIFICATION forming part f Letters Patent NO. 646,835, dated April 3, 1900.

Application filed January 24, 1900. Serial No. 2,693. (No model.)

To all whom, it may concern: I

Be it known that I, WILLIAM H. JACKSON, of Waterbury, in the county of New Haven and State of Connecticut, have invented a new Improvement in Book Rests or Tables; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent,

in I

Figure l, a perspective View of a support constructed in accordance with my invention; Fig. 2, a broken vertical section of a portion of the post, rod, arm, and brace.

This inventionrelates to an improvement in book rests or tables, and while adapted for attachment to the arm of a chair it is equally applicable for attachment to beds or other places where an adjustable book rest or table is desired, the object of the invention being a simple construction and arrangement of parts, which may be readily applied and removed and which permits a great range of adjustment; and the invention consists in the construction as hereinafter described, and particularly recited in the claims.

The device proper is supported in a plate A, adapted to be secured to the arm of a chair either by screws extending through `the plate or by a clamp B, as shown. In the top of the plate is a longitudinal undercut groove C, into which ablockD may pass. On this block and extending upward through the groove C is a tubular post E, formed in one side with a longitudinal slot e. Into the'top of this post is inserted a rod F, which is adapted to be clamped to the post in any desired -manner. As herein shown, the rod is formed in one side, near its lower end, with a threaded opening f, adapted to receive a thumb-screw G,which passes through a plate H and through the slot e, the plate H being wider than the slot, so as to bear on the opposite sides thereof and clamp the rod to the post when the screw is tightened. Over the upper end of the post is placed a collar I, which rests upon the upper end of the plate H. The upper end of the rod F is formed with a recess F to receive a pin J, depending from a head J', and in this pin is an annular groove J 2, into which a set-screw J extends, and whereby the pin may be simply held against vertical movement or clamped in the upper end of the rod. To the head J an arm K is pivotally connected, and ron this arm is a collar L, which is connected with the collar I by a brace M, the connection preferably being by set-screws N, whereby the brace may be firmly clamped between the collars and the collars clamped, respectively, on the post and arm. Also mounted on the arm K is a slide O, which is held against rotation either by a set-screw or by making the end of the arm angular and the slide O of corresponding shape. On the slide is a vertical stud P, over which a socket Q sets, which is adapted to be clamped thereto, and at the upper end of the socket is a disk R, which is adapted to be clamped to a disk S, depending from a plate T, to which a bookholding rack, table, or other device may be attached.V The book-rest may therefore be turned or tilted to the desired angle. It is elevated by disengaging the clamp between the post E and the rod F and raising the rod to the desired degree. In thus lifting the rod the collar I is also raised, so that the relative position of the brace with the arm is maintained. If it is desired to have the arm K stand at an angle, the collar L may be moved on the arm either toward or from the rod F, so as to raise or lower the outer end of the arm, and the arm may be turned horizontally, as the head J freely turns in the upper end of the rod F, and the collar I is free to turn on the post E. When not required, the device may be removed from the plate A or that plate with the device disengaged from the arm of the chair. y

It will thus be seen that the device is readily applied and removed and is adapted to be adjusted to almost any position desired, and when not required for use may be detached and the parts separated, so as to occupy but a little space, which is also a great consideration in packing them for shipment.

It is evident that the means for holding the parts in their various positions of adjustment may be changed, and I therefore do not wish to be understood as limiting the invention to the exact details of construction shown; but,

Having fully described my invention, what IOO 2. An adjustable support comprising a plate, having an undercut groove, a block in said groove and supporting a Vertical tubular post formed with a longitudinal slot, a rod adapted to enter the upper end of said post, a screw, a plate through which the screw extends into the post, the said plate overlapping the sides of the slot inthe post, whereby the rod may be clamped to the post, a head swiveled in the upper end of said rod and adapted to be clamped thereto, an arm pivotally connected with said head, a collar surrounding said post above the clamping-plate thereon, a collar on said arm, a brace connectingsaid collars and adapted to be clamped thereto, a slide on said rod, and a support adapted to be adjustably connected with said slide, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

VILLIAM II. JACKSON.

Titnessesz W. F. HAssELBAcH, JEREMIAH F. DONOVAN.

Images