Holder for a plumb bob

Details Holder for a plumb bob Holder for a plumb bob

1979-09-07

1981-05-12

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

G01C 1510

Patent

active

042663474

ABSTRACT:
A holder for a plumb bob, comprising a frame formed from a continuous length of relatively stiff but bendable wire to provide a spool portion for the plumb bob cord, and a storage rack to hold the plumb bob. A cord play-out stop member is included to anchor and hold a portion of the cord against further unwinding after a desired length has been unwound from the spool.

REFERENCES:
patent: 642888 (1900-02-01), Van Vliet
patent: 1098033 (1914-05-01), Friendship
patent: 1305486 (1919-06-01), Orman
patent: 2135211 (1938-11-01), Johnson
patent: 2492609 (1949-12-01), Worden
patent: 2637913 (1953-05-01), Williams
patent: 3442025 (1969-05-01), Mathiesen
patent: 3568322 (1971-03-01), Showers

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