Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1976-08-02
1978-01-10
Tokar, M.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 29, 324 725, G01N 2742
Patent
active
040681629
ABSTRACT:
A control system for a water rinse tank or the like which continuously monitors the rinse water quality by means of electrical conductivity and adds clean water when the water-contamination conductivity of the rinse water builds up through use to a predetermined value. A conductivity cell which is transparent and may be disassembled, and adjustable for operation over a wide range of conductivity settings. A power circuit with triac for switching power to a valve solenoid. A silicon controlled rectifier (SCR) and its associated circuitry located at the conductivity cell for controlling the triac, with the SCR operation directly controlled by the conductivity cell. A zener diode-transistor voltage regulating circuit for consistently maintaining substantially the same spiked waveform across the conductivity cell both for water off and water on conditions.
REFERENCES:
patent: 3262051 (1966-07-01), Payne, Jr.
patent: 3365376 (1968-01-01), Weyland
Simekus, Inc.
Tokar M.
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