Motion sensing device

Details Motion sensing device Motion sensing device

1987-08-31

1989-01-10

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

33366, 73505, 73516LM, 73654, 340669, 340689, G08B 2100, G01C 906, G01P 1500

Patent

active

047976616

ABSTRACT:
This invention relates to a device adapted to sensing motion when powered by passage of an electric current between two electrodes that is comprised of a container partially filled with an electrically conductive liquid along with two electrodes in contact with the conductive liquid at least one of which is only partially in contact with said conductive liquid. Motion of the liquid causes a change in resistance between the electrodes which may be detected as a change in current flow. These changes in current flow can be amplified and used to activate an alarm or other signal device.

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patent: 4378693 (1983-04-01), Ratcliffe
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patent: 4654977 (1987-04-01), Pakus
patent: 4667188 (1987-05-01), Schwartz
patent: 4710757 (1987-12-01), Haase
Data Sheets (7) on Gravity Sensing Electrolytic Transducers, the Fredericks Company, Philmont Avenue and Anne Street, Huntingdon Valley, PA 19006.
P. F-99 of Handbook of Chemistry and Physics, 67th Edition, 1986-1987; Ed.: Weast, CRC Press, Boca Raton, FL.

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