Communications: electrical – Condition responsive indicating system – With particular system function
Reexamination Certificate
2005-01-25
2005-01-25
Pope, Daryl (Department: 2632)
Communications: electrical
Condition responsive indicating system
With particular system function
C340S539300, C340S584000, C340S598000, C340S612000, C340S618000, C340S622000, C073S29000R, C073S291000, C073S292000
Reexamination Certificate
active
06847291
ABSTRACT:
An apparatus operable in a wet environment for detecting the presence or absence of water in a non-conductive vessel, by measuring changes in dielectric constant and detecting the temperature of water in same vessel. A conductive element coupled to a sensing and switching means, transmits data to the controller, resulting from a change of dielectric constant at the conductive element. A temperature sensor detects and transmits temperature signals to the controller. A controller means receives data, from the dielectric constant sensor means and temperature data from the temperature sensor. Includes a coupling means which transmits data from the controller to an external device. The isolation means electrically isolates the conductive element and temperature sensor means from the water contained in a non-conductive vessel.
REFERENCES:
patent: 5174153 (1992-12-01), Nakano
patent: 6568263 (2003-05-01), Snelling
patent: 6568264 (2003-05-01), Heger
Pope Daryl
Sequence Controls Inc.
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