Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1988-08-17
1989-07-04
Tarcza, Thomas H.
Communications: electrical
Condition responsive indicating system
Specific condition
73295, 200 6104, 340604, 340605, G08B 2100, H01H 2900
Patent
active
H00006521
ABSTRACT:
A surface liquid detector is disclosed for detecting liquids spilled on surfaces such as floors. A temperature-sensitive thermistor probe is used in a bridge circuit to detect the change in resistance in the thermistor due to the change in thermal conductivity that occurs when a liquid contacts the probe. The device is characterized by the ability to detect either conductive or nonconductive liquids, such as water or oil spills.
REFERENCES:
patent: 4037427 (1977-07-01), Kramer
patent: 4413255 (1983-11-01), Cohen et al.
Davis Brent C.
Gayle Tom M.
Breeden David E.
Hamel Stephen D.
Hightower Judson R.
Tarcza Thomas H.
The United States of America as represented by the United States
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