Electronic level device

Details Electronic level device Electronic level device

1983-09-02

1985-05-14

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33334, 340689, G01C 906

Patent

active

045163294

ABSTRACT:
An electronic level device characterized by an enclosure, a knob and shaft rotatably coupled to the enclosure, and a mercury switch located within the enclosure and attached to an end portion of the shaft. The mercury switch is closed when it is in a gravitationally normal position, and is open when it is tilted from the gravitational norm by more than a predetermined amount. By rotating the knob, the angle at which the mercury switch closes can be varied. An audible alarm is actuated by the closure of the mercury switch.

REFERENCES:
patent: 2600363 (1952-06-01), Morris
patent: 3204233 (1965-08-01), Olliff
patent: 3861052 (1975-01-01), Siegfried
patent: 4079521 (1978-03-01), Uhorczak
patent: 4167733 (1979-09-01), Krause et al.
patent: 4182046 (1980-01-01), Ludlow et al.

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