Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1994-11-28
1996-01-09
Cuchlinski, Jr., William A.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33286, 33DIG21, G01C 1510
Patent
active
054818095
ABSTRACT:
A laser plumb bob uses a conventional blumb bob body, hollowed to include a laser device therein. The laser device is affixed within the plumb bob body to preclude relative movement therebetween, to ensure accuracy for the device. With the use of a laser to provide a plumb line of coherent light which beam does not spread, the plumb bob may be suspended from a relatively short line in order to dampen oscillations more quickly. Apparatus providing for use of the plumb bob by a single person is also disclosed, comprising an upper fixture from which the plumb bob is suspended, an extension arm, and a target. The target and upper fixture may be connected by a telescoping column, if desired. The upper fixture may include a wind shield or guard, if desired, so provide greater stability for the plumb bob. The apparatus allows a single person to check plumb lines for walls and the like, thus providing greater efficiency and economy in building construction. The apparatus may also be used with a conventional plumb bob, if desired.
REFERENCES:
patent: 1952745 (1934-03-01), Deasy
patent: 3909952 (1975-10-01), Lagasse
patent: 4718170 (1988-01-01), Wheeler
patent: 5163229 (1992-11-01), Cantone
patent: 5400132 (1995-03-01), Trepagnier
Bennett G. Bradley
Cuchlinski Jr. William A.
Litman Richard E.
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