Digital head-out level

Details Digital head-out level Digital head-out level

1982-02-11

1984-08-28

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33391, G01C 906

Patent

active

044675275

ABSTRACT:
A digital level is disclosed that includes a digital display for displaying the angle of inclination between a straight edge of a digital level and a desired reference plane. An alarm is also included to indicate whenever the digital level is held parallel to a desired reference plane, such as alevel horizontal plane, or a vertical plane. The level transducer employed within the digital level includes a rotating member that is weighted so as to always be aligned with a gravitational field in which the level is used. The body of the level includes flip-up sights so that it can readily be used as a transit. A microswitch located on the underneath side of the level automatically powers the circuitry used in connection with the sensing circuitry and digital display whenever the level is placed on a planar surface.

REFERENCES:
patent: 1300818 (1919-04-01), Collins
patent: 2922874 (1960-01-01), Clerk et al.
patent: 3861052 (1975-01-01), Siegfried
patent: 4063366 (1977-12-01), Bane
patent: 4132004 (1979-01-01), Deschenes et al.
patent: 4167818 (1979-09-01), Cantarella et al.
patent: 4182046 (1980-01-01), Ludlow et al.
patent: 4253242 (1981-03-01), McInerney
patent: 4277895 (1981-07-01), Wiklund
patent: 4356638 (1982-11-01), McKenna et al.
patent: 4388758 (1983-06-01), Ernst et al.

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