Environmental control system with condition responsive timer and method
AssigneeAlfred T. Newell, III
InventorsAlfred T. Newell, III, E. Lane Nichols
Life of this patent
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Abstract
A controller (8) of air conditioning apparatus (18) with a cycle timer (12) for periodically actuating the apparatus (18) irrespective of temperature combined with a thermostat (10) for actuating the apparatus (18) in accordance with sensed temperature and logic circuitry (FIG. 3) for recycling the timer (12) to prevent excessive actuation of the apparatus (18) while ensuring minimum actuation in accordance with sensed conditions. Both the duration of the cycle period and the duty cycle of the timer are selectively variable over a wide range through means of timer circuitry employing dual electronic timers (12a and 12b) which are controlled to operate in a complementary manner.
Claims12
In an environmental control system having apparatus for conditioning the air within an environmentally controlled space, an improved time controller of the apparatus comprising:
- a pair of cycle timers;
- means for complementarily varying the duty cycles of both of said timers with a single control, manual movement of said control increasing the duty cycle of one of said timers and substantially reducing the timing cycle of the other by a substantially equal amount relative to the total cycle period;
- and
- means for actuating the apparatus during a preselected portion of the cycle of one of said timers.
In an environmental control system having apparatus for conditioning the air within an environmentally controlled space, an improved time controller of the apparatus, comprising:
- a pair of cycle timers;
- means for complementarily varying the duty cycles of both of said timers with a single control;
- means for actuation the apparatus during a preselected portion of the cycle of one of said timers;
- and
- a pair of counters respectively triggered by said pair of timers to enlarge the cycle periods associated therewith.
In an environmental control system having apparatus for conditioning the air within an environmentally controlled space, an improved time controller of the apparatus, comprising:
- a pair of cycle timers;
- means for complementarily varying the duty cycles of both of said timers with a single control, said single control included a potentiometer resistor symetrically connected with both of said timers;
- and
- means for actuating the apparatus during a preselected portion of the cycle of one of said timers.
In an environmental control system having apparatus for conditioning the air within an environmentally controlled space, an improved time controller of the apparatus comprising:
- a pair of cycle timers;
- means for complementarily varying the duty cycles of both of said timers with a single control, said single control including a potentiometer resistor symetrically connected with both of said timers and a pair of substantially equal compacitors connected with opposite sides of said potentiometer resistor and to said pair of timers, respectively;
- and
- means for actuating the apparatus during a preselectd portion of the cycle of one of said timers.
Dependencies are inferred from the claim text.