US257970A

US257970A - Book-support

Info

Publication number: US257970A
Authority: US
Publication date: 1882-05-16
Anticipated expiration: 1899-05-16

Description

(No Model.)

W. MURRAY.

BOOK SUPPORT. 110,257,970. Patented May 16, 1882 III/L INVENTOE wmmssns.

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UNITED STATES PATENT ()FFICE.

WILLIAM W. MURRAY, OF BALTIMORE, MARYLAND.

BOOK-SUPPO RT.

SPECIFICATION forming part of Letters Patent No. 257,970, dated May 16, 1882,

Application filed January 16, 1882. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM W. MURRAY, of Baltimore city, State of Maryland, have invented certain new and useful Improvements in Book-Supports; and I hereby declare the same to be fully, clearly, and exactly described as follows, reference being had to the accompanying drawings, in which- Figure 1 is a side elevation of the device. Fig. 2 is an elevation partly in section, on an enlarged scale, of a detail of the same.

My invention relates to book supports or rests adapted for attachment to the sides of chairs; and it has for its object to provide a device of that class having means for effecting every desired adjustment, and adapted for use as a book-rest or desk. The points of novelty are made the subject of the claims.

In the drawings, Ais the table or rest proper, having at its lower edge a ledge of the usual form. 011 the ledge is pivoted a plate, 1', by preference of cast metal, and heavy enough, when resting upon a book, to hold it open. Instead of depending upon the weight of the plate for this purpose, I may provide it with a spring like an ordinary bill or letter file. The edgeof the plate 41 has a downward projection or rib, t, for holding books having narrow margins, and also to admit of the use of the device with thin books, such as pamphlets. The tableA is pivoted at a to the end of a rod, B, which is firmly secured at its lower end to'a sleeve, 1).

O is a curved plate, pivoted at c to the table A and passing through a slot in the rod B. The outer edgeof the plate is rateheted, as shown, to engage with a pin or lip, c, in the rod B. By this means I am enabled to alter the inclination of the table with one hand, it being only necessary to lift the free end of the plate 0 so as to disengage the ratchet, tilt the table, and allow the plate to fall, when it is secured in its new position. The plate 0 is made long enough to sustain the table in a vertical, horizontal, and any intermediate position. When it is desired to use the table A to write upon, it is adjusted horizontally and turned so as to bring the ledge away from the set-screw, d, and enters the sleeve 1). At its upper end is turned a groove, j, with which a set-screw, D,en gages. A pin, d, projects from the side of the rod 6, whereby it is prevented from dropping through the sleeve E should the screw D be turned back too far. The rod or-tnbe F passes through a sleeve, f, on the end of a vertical rod, Gr, wherein it is held by a set-screw, f. The rod G passes through a bearing, h, which is screwed to the arm of the chair, and which is also provided with a setscrew, it, which serves to prevent the rod from turning. The end of the rod G rests in a step, It, secured to the side of the chair-seat.

In operation the table, being adjusted to the desired angle, is swung round in front of the occupant of the chair, and is adjusted vertically by raising the rod 0 and clamping it by means of the screw (1. The table is still free to swivel about a vertical axis; but this may be prevented, if desired, (in case the device is used upon a rocking-chair it would be necessary,) by turning up the screw D so as to 'claim as new, and desire to secure by Letters Patent, is-

1. In combination with the table A, pivoted about a horizontal axis in the end of a vertical swiveling rod, the sleeves b E and the rod 6, provided with the pin d, as set forth.

2. In combination with the table, pivoted, as described,-in the end of the rod B, the sleeve 1), rigidly secured to the latter, and having screw D, the vertically-adjustable rod e, -having groove j and pin d, and the sleeve E, secured to the horizontal arm, as set forth.

3. The book-support consisting of the table A, rod B, bar 0, sleeves b E, and rod e, the tube F, sleeve f, androd G, the said sleeves being provided with clamping-screws, as set forth.

WM. W. MURRAY.

Witnesses:

R. D. WILLIAMS, W. ABERTRAM.