Illuminated spirit vial and level

Details Illuminated spirit vial and level Illuminated spirit vial and level

1981-12-03

1983-10-04

Stearns, Richard R.

Geometrical instruments

Indicator of direction of force traversing natural media

With viewing aid

33379, 362120, G01C 932

Patent

active

044070756

ABSTRACT:
A tubular-shaped spirit vial is provided which is capable of being illuminated at its ends, offering improved observation of the spirit bubble location. The spirit vial has particular application in carpenter's and other tradesperson's levels providing greater ease in making, and more accurate, horizontal and vertical level determinations in poorly lighted work areas and against dark wood.

REFERENCES:
patent: 1760727 (1930-05-01), Von Hofe
patent: 2752693 (1956-07-01), Wullschleger
patent: 2944144 (1960-07-01), Naylor
patent: 3584212 (1971-06-01), Hansen
patent: 3863067 (1975-01-01), Gooley
patent: 3878618 (1975-04-01), Freeman

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