Thermodynamic electronic actuator for building heating/air condi

Details Thermodynamic electronic actuator for building heating/air condi Thermodynamic electronic actuator for building heating/air condi

1988-07-07

1989-09-05

Wayner, William E.

Automatic temperature and humidity regulation

With timing element

Timer other than clock

62158, 236 47, G05D 2300

Patent

active

048630993

ABSTRACT:
This relates to a thermodynamic electronic actuator for intermittently controlling the operation of a heating and/or air conditioning system for any temperature controlled area when a door or window is left open or ajar. The actuator circuit comprises a normally-closed switch (or switches if used for more than one opening), which initiates operation of a count-up timer to interrupt the thermostat line after a predetermined period whenever a door or window is left open. To restore power, all that is required is to shut the window or door. This actuates a count-down timer that will restore the thermostat line after a predetermined period, assuming the window or door is not reopened, interrupting the countdown.

REFERENCES:
patent: 3729735 (1973-04-01), Dageford
patent: 4035796 (1977-07-01), Hedly et al.
patent: 4508740 (1977-11-01), Dalton et al.
patent: 4784319 (1988-11-01), Kaiser

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