Level device

Details Level device Level device

1987-12-01

1989-03-21

Haroian, Harry N.

Geometrical instruments

Straightedge type

Plural straightedges, relatively moveable

33451, B43L 706

Patent

active

048131490

ABSTRACT:
A level device has an extendable body portion with a pair of pivotally mounted extendable swingers. The swingers may be adjusted to swing freely, or be locked at any desired angular position. A protractor scale on the pivot mount of each swinger provides an indication of the angle of the swinger with respect to the main body portion. A spirit level is also provided on the pivot mount of each of the swingers to allow the body portion to be held in a horizontal level position. The device is useful for hanging pictures on walls, locating shelves, drawing designs on walls and measuring operations.

REFERENCES:
patent: 94814 (1869-09-01), Fales
patent: 896847 (1908-08-01), Messner
patent: 1601138 (1926-09-01), Moore
patent: 1624535 (1927-04-01), Christianson
patent: 2332347 (1943-10-01), Schaefer et al.
patent: 3991474 (1976-11-01), Rath
patent: 4562649 (1986-01-01), Ciavarella

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