Geometrical instruments – Miscellaneous – Light direction
Patent
1983-06-10
1985-03-05
Haroian, Harry N.
Geometrical instruments
Miscellaneous
Light direction
33293, 33DIG1, G01C 706
Patent
active
045022240
ABSTRACT:
A self leveling adapted to be moved along a substantially vertical wall comprises a base assembly adapted to be moved up and down along the substantially vertical wall, a roller assembly pivotally connected to the base assembly to be in continuous contact with the vertical wall, and weight means pivotally connected to the roller assembly. The leveling device is further provided with a horizontal member connected to the weight means perpendicular to an imaginary vertical line extending through the weight means.
REFERENCES:
patent: 3826576 (1974-07-01), Stewart
patent: 3874088 (1975-04-01), Shaffer, Jr.
patent: 3940858 (1976-03-01), Perotti
patent: 3985356 (1976-10-01), Carlock
patent: 3988837 (1976-11-01), Benson
patent: 4085512 (1978-04-01), Bod et al.
Davies Alan
Kopil Steven J.
McCabe, III Joseph H.
E. W. Saybolt & Co., Inc.
Haroian Harry N.
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