Spirit level

Details Spirit level Spirit level

1979-11-01

1981-11-10

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

G01C 928

Patent

active

042990351

ABSTRACT:
Spirit level, whose level element (4) is adjustable relative to the measuring surface (30) by an adjusting device (28) in a locating area (24). The adjusting device (28) has for this purpose at least one set screw (44, 46, 48), whose conical or convex end (42) engages on a conical or convex edge located on a sleeve member (20) surrounding the level element, a supporting member (66, 68, 72, 74) fixed to one end of the level element or to the actual glass body of the level element. A spring member (51, 53) engages on the side of the conical or convex edge (40) facing the contact point with the set screw and serves to limit the magnitude of the adjusting force of the set screw.

REFERENCES:
patent: 1163203 (1915-12-01), Berkebile
patent: 1583957 (1926-05-01), Carrier
patent: 1624339 (1927-04-01), Hapgood
patent: 2301769 (1942-10-01), Babcock
patent: 2519211 (1950-08-01), Wyler

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