Monitor apparatus for a bed underlying water

Details Monitor apparatus for a bed underlying water Monitor apparatus for a bed underlying water

1991-05-20

1994-09-20

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

200 6147, 324 712, G08B 2100, H01H 3502

Patent

active

053493273

ABSTRACT:
A sensor is located in a bed underlying water. A downward array of sensors may be buried in the bed during normal flow conditions so as to be in a disabled mode. The sensor has an oscillatable arm (21) having a first end portion (22) for supporting the arm, and a second end portion (23) housing a sensor cell (25) e.g. an omni-directional mercury switch. The alarm signal may be indicative of risk of collapse of a hydraulic structure, e.g. the foundation of a bridge pier.

REFERENCES:
patent: 2240880 (1941-05-01), Bennett
patent: 2704046 (1955-03-01), Moraga
patent: 3545272 (1970-12-01), McGill
patent: 3550447 (1970-12-01), Beresic
patent: 3697708 (1972-10-01), Beresic
patent: 3933041 (1976-01-01), Hyer
patent: 3962693 (1976-06-01), Schambun
patent: 4139750 (1979-02-01), Rau
patent: 4642557 (1987-02-01), Ross

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