Alternating controller comprising pair of mutually exclusively-operated timers
OwnerAaron F. Greeninventor
Life of this patent
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Abstract
An electronic controller having a pair of sequential outputs for energizing a line voltage AC load or loads in the manner of a single pole double throw (SPDT) switch. The controller comprises a pair of mutually exclusively operated timers, each having an adjustable timing circuit associated therewith. The output from each timer operates a triac which couples power to the load. A termination circuit including a pair of flip-flops and an operating switch is associated with the timers for terminating at any time the present state of the controller and commencing the other state without introducing a timing error.
Claims18
An electronic controller for controlling the power applied to at least one load comprising;
- first and second timers each having a trigger input, a timing input and an output,
- means coupling the output of the first timer and trigger input of the second timer, and the output of the second timer and trigger input of the first timer to provide dependent operation between timers,
- a pair of electronic switches coupling, respectively, from the output of the first and second timers to the load,
- first and second charging circuits coupled to the timing input of the first and second timers, respectively, for providing a predetermined time interval of operation of each timer,
- and timer selection means including manual switch means coupled to the timing input of at least one of said timers for changing the state thereof.
An electronic controller for controlling the power applied to at least one load, comprising;
- first and second timers each having a trigger input, a timing input and an output, input
- means coupling the output of the first timer and the trigger input of the second timer, and the output of the second timer and trigger input of the first timer to provide dependent operation between timers,
- a pair of electronic switches coupling, respectively, from the output of the first and second timers to the load,
- first and second charging networks coupled to the timing input of the first and second timers, respectively, for providing a predetermined time interval of operation of each timer,
- and means for resetting the first timer to an opposite state at power-up.
Dependencies are inferred from the claim text.