End point quality control light circuit

Details End point quality control light circuit End point quality control light circuit

1976-08-20

1978-04-04

Adee, John

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

In effluent conduit

210 96R, 340236, 137 93, C02B 176

Patent

active

040826660

ABSTRACT:
An end point quality control light circuit for a water demineralizer. The quality control light circuit comprises a power cord, a housing for the electronics, and a probe-light assembly. The probe-light assembly includes a pair of spaced apart A.C. energized probes, and applies approximately 12 volts to the water. The probes are transformer isolated from the power input, and the final drive to an indicating lamp is transistorized. The current through the probes, directly proportional to the quality of the water, develops a voltage that is compared to a threshold voltage. The indicating lamp is illuminated to indicate high water quality, and is switched off by the final drive transistor when the water quality becomes unacceptable. An optional switching circuit, isolated from the quality control circuit, enables the actuation or control of external devices in dependence upon water quality. Various techniques for minimizing leakage currents are also disclosed.

REFERENCES:
patent: 3334745 (1967-08-01), Burgess et al.
patent: 3343045 (1967-04-01), Law et al.
patent: 3410292 (1968-11-01), Bennett et al.
patent: 3430129 (1969-02-01), Cardeiro
patent: 3652910 (1972-03-01), Urbain
patent: 3680070 (1972-07-01), Nystuen
patent: 3768649 (1973-10-01), Fleckenstein
patent: 3796925 (1974-03-01), Breeming
patent: 3932279 (1976-01-01), Yocum
Beckman Instruments Inc., "Water Purity Controller," Instruction Manual, 18 pp.
Devon Products, Inc., "Conductivity Indicators for Home and Office," 4 pp., June 30, 1976.

Affiliated with

Also associated with

Rating

End point quality control light circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with End point quality control light circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and End point quality control light circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-722790