G - Physics
05
D
341/32
G05D 23/19 (2006.01) G01K 13/02 (2006.01) G05D 11/16 (2006.01) G05D 23/13 (2006.01)
Patent
CA 1308794
ABSTRACT OF THE DISCLOSURE A system having a microprocessor to provide an adjustable control of the temperature and pressure of water at the outlet of a single adjustable valve. The water temperature at the valve outlet is constantly monitored. A processor compares the actual water temperature with a specif- ically requested temperature for the water at the valve outlet, and provides signals to relays and a control circuit for a motor which adjusts the temperature of water by the relative proportions of hot and cold water discharged through the valving to the outlet, The system with the microprocessor provides a multi-speed control of the motor having variations in the speed of adjustment of the valve so as to effect a quick valve movement to a temperature in the vicinity of the desired temperature after which fine tuning provides the exactly requested temperature. The calculations of the microprocessor by including continuous monitoring of the valve positions and the water temperature coordinates the relative positioning of the valve in the mixing of the hot and cold water with the regulations of the water temperature by mixture in the valve so that the instructions from the microprocessor in response to the water temperature are accommodated to fully open and fully closed positions of the valve.
572305
Garris Charles A.
Macrae & Co.
Memrysafe Inc.
Speakman Company
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