Illuminated spirit level

Details Illuminated spirit level Illuminated spirit level

1991-04-04

1991-12-31

Cuchlinski, Jr., William A.

Geometrical instruments

Indicator of direction of force traversing natural media

With viewing aid

33379, 33381, G01C 932

Patent

active

050759787

ABSTRACT:
An illuminated spirit level comprising an elongated bar having a number of apertures wherein bubble tubes are positioned for measurement of the flatness of a surface. An illumination means including lamps, a system of conductor wires, a dual battery configuration connected in series and a switch are contained within the bar. Each aperture is illuminated by a lamp and each lamp communicates with the batteries by conductor wires which are immersed in a channel containing a vibration-dampening fluid. The fluid is supplied through a duct which is accessible from the exterior of the bar. A switch protruding through the exterior of the bar permits power to the lamps.

REFERENCES:
patent: 2615122 (1952-10-01), Coombs
patent: 3192375 (1965-06-01), Olson
patent: 4271458 (1981-06-01), George, Jr.
patent: 4655470 (1987-05-01), George, Jr.
patent: 4833788 (1989-05-01), Munro
patent: 4876798 (1989-10-01), Zimmerman

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