Magnified dial level indicator with magnetic swing plate

Details Magnified dial level indicator with magnetic swing plate Magnified dial level indicator with magnetic swing plate

1977-01-28

1978-05-23

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33347, 33348, 350114, G01C 912

Patent

active

040903060

ABSTRACT:
A level indicator which features a pendulum-style magnified dial and a versatile magnetic swing plate or base. The swing plate is pivotally and laterally moveable with respect to the main casing of the level indicator to provide a more stable and accurate adherence to the surface whose alignment is being checked. The magnetic surface of the swing plate cooperates with a coplanar magnetic face of a fixed-position heel plate to add further stability and accuracy. The level indicator features a hairline-bearing suspended mass in the form of a magnifying lens, the hairline being preferably scribed along its outer convex surface to eliminate parallax errors. The indicia-bearing dial plate may be edgewise illuminated by one or two light sources internally positioned and powered. Two substantially identical viewing faces are preferably provided to increase versatility.

REFERENCES:
patent: 407285 (1889-07-01), Ensminger
patent: 679577 (1901-07-01), Schaffner
patent: 962467 (1910-06-01), Rhodes
patent: 1797213 (1931-03-01), Marcum
patent: 2551524 (1951-05-01), Bullivant
patent: 2589263 (1952-03-01), Kenosian
patent: 2659976 (1953-11-01), Callahan
patent: 3103749 (1963-09-01), Dillemuth
patent: 3762799 (1973-10-01), Shapiro

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