Straight edge level

Details Straight edge level Straight edge level

1977-12-19

1979-05-08

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

With independent linear measurement

33374, G01B 1962

Patent

active

041528387

ABSTRACT:
A straight edge level is provided which is comprised of a level body having a plurality of conventional leveling bubbles thereon, and a sliding scale member which is extendable from but substantially planar the level body itself. In the preferred embodiment, a scale is provided on the surface of the level body, and a second scale provided on the surface of the slide member. In operation, an extension of the slide member will produce a scale reading at the end portion of the level body from which the slide member extends. The scale provided on the level body begins its numerical climb from that same location on the level body. Thus, in operation, the user can add the numbers appearing on the two scales and get a desired overall measurement.

REFERENCES:
patent: 149532 (1874-04-01), Sherwin
patent: 686360 (1901-11-01), Smiddy
patent: 888070 (1908-05-01), Dissell
patent: 1413056 (1922-04-01), Parrish et al.
patent: 2145988 (1939-02-01), Meder
patent: 2551524 (1951-05-01), Bullivant
patent: 2878569 (1959-03-01), Metrulis
patent: 3089245 (1963-05-01), Cromer et al.
patent: 3273246 (1966-09-01), Siberini
patent: 3328887 (1967-07-01), Wright

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