Post, pipe, and sign level

Details Post, pipe, and sign level Post, pipe, and sign level

1998-01-15

2000-02-29

Hirshfeld, Andrew H.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33374, 33382, 33465, G01C 928

Patent

active

060293594

ABSTRACT:
A post level including a pair of arms pivotally attached to each other at a hinge, each arm defining at least one level face for plumbing a surface, and at least one bubble vial mounted on at least one of the arms on a surface generally opposite to the at least one level face, wherein the arms may be swung about the hinge so as to be positioned generally parallel with each other with the at least one bubble vial being between the arms.

REFERENCES:
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patent: 392124 (1888-10-01), Jackson
patent: 1767335 (1930-06-01), Wilcox
patent: 2727314 (1955-12-01), Dossie et al.
patent: 3820249 (1974-06-01), Stone
patent: 3826013 (1974-07-01), Baher
patent: 4168578 (1979-09-01), VanderWerf
patent: 4343093 (1982-08-01), Eadens
patent: 4446627 (1984-05-01), Persson
patent: 4976040 (1990-12-01), Mish et al.
patent: 5207004 (1993-05-01), Gruetzmacher
patent: 5255443 (1993-10-01), Schmidt

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