Fluid handling – Systems – Programmer or timer
Patent
1978-09-20
1981-02-10
Cohan, Alan
Fluid handling
Systems
Programmer or timer
3071414, 3071418, 134 57D, 134 58D, B08B 300
Patent
active
042495733
ABSTRACT:
A programmed sequence fluid distributor system is provided which is particularly adapted for controlling fluid feeding and the maintenance of the detergent concentration in the washing bath of a dish-washing machine or the like. The system basically comprises a fluid source, a conduit arrangement for moving the fluid to a desired location, a pump for controlling the flow of the fluid and a programmer for controlling the pump. The programmer comprises an electronic circuit including at least two stages. These stages each comprise RC type oscillators wherein the resistive branch includes a potentiometer for setting the duration of the cycle associated with that stage. A binary pulse counter counts the pulses produced by the oscillator and ultimately controls the stopping and starting of the pump during the various operating cycles of the machine, by controlling energization of a relay in the pump circuit.
REFERENCES:
patent: 2859760 (1958-11-01), Borell
patent: 3639844 (1972-02-01), Karklys
Cohan Alan
Odev S.A.
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