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Publication numberUS153227 A
Publication typeGrant
Publication dateJul 21, 1874
Filing dateMay 21, 1874
Publication numberUS 153227 A, US 153227A, US-A-153227, US153227 A, US153227A
InventorsIsaac Walkee
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in self-adjusting book-racks
US 153227 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

UNITED STATES PATENT FFICE ISAAC WALKER, OF BEMBROKE, NEW HAMPSHIRE.

IMPROVEMENT IN SELF-ADJUSTING BOCK-RACKS.

Specification forming part of Letters Patent No. 153,227, dated July 21, 1874; application filed May 21, 1874.

To all whom 'it may concern.'

Be it known that I, lsAAc WALKER, of Pembroke, Merrimack county, in the State of New Hampshire, have invented a new and useful Self-Adjusting Book-Rack; andI hereby declare the following to be a full and exact description thereof, reference being had to the accompanying' drawings, forming part of this specification.

The nature or essence of my invention consists in a pair of ways or slotted base, provided with one or more traversing clamps or stands, drawn against the books or things to be clamped by a spring.

Figure l is a plan of my improved self-adjusting book-rack; Fig. 2, is an elevation of one side, and Fig. 3 a cross-section on the line z Z. .i y i In the above-mentioned drawings, A r'A r.'lt'ref'I two ways, connected by the ends yB B', forming the base to which the other parts are fastened or connected. C C are movable stands, with bases D D fitted on and between the ways A A, so as to traverse freely, and are held in place by the plates E/E, fastened to the bottoms of the stands, whichy plates project into rabbets in the under sides of the ways A A. To draw the stands U C toward each other and clamp the books placed between them, I fasten cords F to each of them and to the grooved pulley G, which is fastened to the vertical shaft H, which turns in the bars or plates I I, fastened to the ways A A. To turn the shaft H and pulley Gr, aud wind the cords around the pulley to draw the stands toward each other, I fasten the inner end of the' coiled spring J to the shaft H, and the outer end to the w. ys A. The sash-lifts K K are fastened to the bases D D, to whichv the thumbs may be applied to draw the stands apart, and, when drawn apart, if one stand is held the other remains stationary, so that one hand can be used to place the booksA between the stands.

If preferred, one of the stands may be fastened to the end of the ways, and the shaft, pulley, and spring placed near the same end, and thus have only one stand to traverse to clamp the books. I contemplate my improvements may be applied to book-case and library shelves to great advantage.

I claim- In combination with the ways A A and sliding stands or jaws C C of a book-rack, the spring J, whereby the jaws C C are automatically drawn together when books or other articles are placed between them, substantially as set forth.

2. The combination of the stands or jaws C C, cords F F, pulley G, and spring J, substantially as specied.

ISAAC WALKER. Witnesses:

ALBERT H. YEAToN, JOHN R. KIMBALL.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2738881 *Apr 10, 1951Mar 20, 1956Michel GinoDisplay and storage holder for containers
US2879897 *Mar 29, 1954Mar 31, 1959David ShechtmanSelf-adjusting holder for flat articles
US3679064 *Oct 20, 1970Jul 25, 1972Howkinson George EArticle holder
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US20070251900 *Jun 8, 2007Nov 1, 2007Rtc Industries, Inc.Product Management Display System With Trackless Pusher Mechanism
US20080314851 *May 1, 2008Dec 25, 2008Jesse Dustin JacobyPortable desktop apparatus for exercise equipment
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Classifications
Cooperative ClassificationA47B65/00