Bubble inclination gauge including a central shield for light-em

Details Bubble inclination gauge including a central shield for light-em Bubble inclination gauge including a central shield for light-em

1989-07-03

1990-09-18

Cuchlinski, Jr., William A.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

333482, 33DIG3, G01C 906, G01C 934

Patent

active

049569228

ABSTRACT:
Inclination gauge having a reservoir filled with liquid and containing a gas bubble. The position of the gas bubble is detected by light detecting devices by which light going through the completely filled tube has a different convergent nature than light going through the tube partially filled with liquid and partially filled with gas. On the centerline of the light emitting and light detecting devices, between the reservoir and the light detecting devices, a shield is provided.

REFERENCES:
patent: 3172212 (1962-05-01), Pappas
patent: 3324564 (1963-04-01), Wright et al.
patent: 3371424 (1968-03-01), Sweet
patent: 4164077 (1979-08-01), Thomas
patent: 4484393 (1984-11-01), LaFreniere
patent: 4625423 (1986-12-01), Sackett

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