| 摘要 |
A condition responsive time proportional control means which has a relatively fast time constant when operating in its proportional band has the time constant expanded by means of a digital counter. The counter is a resettable unidirectional type counter. The output of the counter drives a switch means and a load along with a means for altering the time constant of the condition responsive time proportional control means. The time constant is altered by a switching means that changes the charge and discharge path of a capacitor used in creating the time constant.
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