Level indicating instrument

Details Level indicating instrument Level indicating instrument

1977-02-07

1978-09-12

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33390, G01C 928

Patent

active

041125851

ABSTRACT:
A level indicating instrument permitting simultaneous reading in two horizontal and/or vertical planes, one of which planes may be preset to any desired deviation from the horizontal. A pair of straight-edges perpendicular to each other along their long axis are coupled to a bubble indicator of the bull's-eye type. The bubble indicator may be rotated relative to the straight edges and set to indicate vertically or horizontally or any desired preset angle between vertical and horizontal.

REFERENCES:
patent: 521306 (1894-06-01), Campbell
patent: 1063342 (1913-06-01), Ekman
patent: 2074108 (1937-03-01), Graham
patent: 2659975 (1953-11-01), Van Gundy
patent: 3173211 (1965-03-01), Williams
patent: 3728796 (1973-04-01), Lobaugh

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