Expansible spring-loaded retention clamp for books or other obje

Details Expansible spring-loaded retention clamp for books or other obje Expansible spring-loaded retention clamp for books or other obje

1985-01-08

1986-08-19

Gibson, Jr., Robert W.

Supports: racks

Special article

Book support type

211 13, A47B 6500

Patent

active

046064656

ABSTRACT:
A dual element, spring-biased clamping device such as a bookend is proposed in which the clamping pressure exerted by the elements can be varied while maintaining the relative separation of the elements. One element comprises a polygonal wall to which a tethering cord is attached, the cord being spring-mountedly held within another element. In use, successive walls of the polygonal element can be brought to bear against the retained objects in an over-center relationship of the tethering cord with edge portions disposed between adjacent walls, the over-center relationship causing the polygonal element to snap tightly into place against the retained books.

REFERENCES:
patent: 2284849 (1942-06-01), Schreyer
patent: 2334251 (1943-11-01), Clift
patent: 2738881 (1956-03-01), Michel
patent: 3389805 (1968-06-01), Yeomans
patent: 3679064 (1972-07-01), Howkinson
patent: 4135626 (1979-01-01), Cawood
patent: 4463854 (1984-08-01), MacKenzie

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