Level

Details Level Level

1985-09-19

1986-09-09

Frankfort, Charles

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33348, G01C 932

Patent

active

046100946

ABSTRACT:
A level constructed of clear acrylic plastic including a piece of colored acrylic plastic which serves as a light collector and a continuous passageway in the clear acrylic which reflects the light collected by the piece of colored plastic. By partially filling the passageway with liquid, a line of reflected light appears on the wall of the passageway above the interface between the liquid surface in the passageway and the unfilled portion of the passageway, whereby the level is easier to read than ordinary bubble type levels.

REFERENCES:
patent: 2075502 (1937-03-01), Carlson
patent: 2221152 (1940-11-01), Rylsky
patent: 2541215 (1951-02-01), Davis
patent: 2584917 (1952-02-01), Powell
patent: 3673697 (1972-07-01), Wasson
patent: 4164077 (1979-08-01), Thomas

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