Remote level sensing instrument

Details Remote level sensing instrument Remote level sensing instrument

1977-07-19

1979-05-15

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

G01C 906

Patent

active

041540000

ABSTRACT:
Concentrated light beams from two or more sources are passed through a spirit level mounted in a portable housing and the presence of the light beam columns after passing through the level is detected to indicate on-level or the direction of off-level for a remote plane or surface. In one form, detection circuitry selectably lights one or a pair of indicator lamps appropriately arrayed on a display panel for establishing that the remote spirit level is in a level orientation or the direction of out-of-level. The detector circuitry can include cross-coupling to prevent an erroneous indication of the direction of out-of-level. In another form, multiple pairs of concentrated light sources and detectors are arrayed along the length of the spirit level and digital circuitry converts the detected outputs into a direct digital display and/or into a format appropriately useful for other digital data handling equipment.

REFERENCES:
patent: 3324564 (1967-06-01), Wright et al.
patent: 3371424 (1968-03-01), Sweet
patent: 3813556 (1974-05-01), Beer et al.
patent: 3822944 (1974-07-01), Hopkins et al.

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