Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1983-08-30
1985-10-22
Smith, Robert I.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33299, C01C 906
Patent
active
045479720
ABSTRACT:
An angular measuring system consisting of one or more sensors that transmit angular measurements to a central control unit where numerical readout of any selected sensor is provided. A threshold can be preset at individual sensors or the control unit for an allowable angular deviation, beyond which a warning device is actuated. The circuitry permits locating the sensors remotely from the console and provides precision and stability of operation. Low power consumption permits extended operating periods with internal batteries. False alarms are minimized by incorporating a hysteresis loop in the threshold detection circuitry.
REFERENCES:
patent: 3739364 (1973-06-01), Talkington et al.
patent: 4085375 (1978-04-01), Galuschak
Heidel Jeffrey C.
Hoogervorst Thomas R.
Lane Lynn R.
Swartz Harold L.
Albin Arnold L.
Smith Robert I.
Sperry Corporation
Terry Howard P.
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