Carpenters level and square

Details Carpenters level and square Carpenters level and square

1992-07-16

1993-12-14

Haroian, Harry N.

Geometrical instruments

Straightedge type

Combined with level

33476, 33377, B43L 700, G01C 900

Patent

active

052690660

ABSTRACT:
An improved hand tool comprising a generally L-shaped frame having two legs each formed with a pair of channels spaced apart by a central ridge, and having panels of transparent material, such as tempered glass or plastic, mounted in the channels with a quantity of a suitable liquid contained between the panels to define a level-indicating chamber extending substantially the entire length of each leg and having indicia positioned adjacent the ends of each of these chambers to provide information relating to incremental discrepancies.

REFERENCES:
patent: 257515 (1882-05-01), Pope
patent: 613946 (1898-11-01), Starrett
patent: 817515 (1906-04-01), Polimeni
patent: 2584917 (1952-02-01), Powell

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