Combination level system for a thin rule

Details Combination level system for a thin rule Combination level system for a thin rule

1982-09-17

1985-06-25

Martin, Jr., William D.

Geometrical instruments

Straightedge type

Combined with level

33381, 33458, 33342, G01B 306

Patent

active

045245274

ABSTRACT:
A combination of bi-directional levels is provided as an integral part of the projecting terminal section of a very thin rule. Assembly within the rule section is accomplished by means of over-sized apertures to receive centrally disposed therein fluid level cylinders with a casting of transparent hardened moldable base material encompassing the rule, and interstitially surrounding said levels such as to form a capsular structure maintaining the rule in proper spaced relation for folding, in the instance of a folding rule, with a structural reinforcement for the section of rule supporting the levels.

REFERENCES:
patent: 149532 (1874-04-01), Sherwin
patent: 948777 (1910-02-01), Tuomi
patent: 1338176 (1920-04-01), Finstrom
patent: 1848003 (1932-03-01), Chalupny
patent: 3145475 (1964-08-01), Alford
patent: 3328887 (1967-07-01), Wright
patent: 4194295 (1980-03-01), Simuro et al.

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