Electricity: measuring and testing – Electrolyte properties – Using a conductivity determining device
Patent
1987-02-11
1989-08-01
Strecker, Gerard R.
Electricity: measuring and testing
Electrolyte properties
Using a conductivity determining device
244151B, 294 8229, 340620, 361251, G01N 2702, F23Q 702
Patent
active
048536377
ABSTRACT:
Apparatus for sensing the electrical conductivity of fluid wherein when electrodes of the apparatus are exposed to fluid a voltage is developed on a capacitor which voltage has a magnitude determined by the condition of the electrical conductivity of the fluid to which the electrodes are exposed. A portion of the developed voltage is obtained, such as by means of a voltage divider connected across the capacitor, and this voltage portion is compared by means of a voltage comparator to a reference voltage. When the comparison indicates a predetermined relationship, for example equality, between the developed voltage portion and the reference voltage, a signal is produced which can be utilized to operate a load. In particular, the signal can operate a semiconductor controlled rectifier to complete a discharge path from the capacitor to the load. The load can be an electro explosive device included in a release mechanism for uncoupling a parachute canopy from its load upon landing in water. The load is connected in a series loop including the electrodes, voltage divider and a voltage source with the result that the electrical integrity of the load can be tested using standard equipment and procedures.
REFERENCES:
patent: 4253628 (1981-03-01), Marek
patent: 4420787 (1983-12-01), Tibbits et al.
patent: 4496906 (1985-01-01), Clack
patent: 4513248 (1985-04-01), Miller
patent: 4703280 (1987-10-01), Miller
Conax Florida Corporation
Mueller Robert W.
Strecker Gerard R.
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