Electronic timer switch
OwnerJames S. Congdoninventor
Life of this patent
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Abstract
A timer switch for suspending the application of a direct current input voltage to a load upon the detection of a voltage irregularity in the input voltage. The timer switch includes a transistor switch for selectively connecting the input voltage to the load. The timer switch also includes a timing element which detects the presence of a voltage irregularity in the input voltage and controls the state of the transistor switch based upon the detection of a voltage irregularity in the input voltage. The timer switch includes exactly three terminals and is powered by the input voltage. The timing element includes exactly one energy storage element which is represented as a capacitor.
Claims26
A timer switch for protecting a load from the voltage irregularities of an input voltage, the load having a first terminal and a second terminal, the second terminal of the load being connected to ground, said switch comprising:
- (a) a transistor switch which includes a first terminal, a second terminal and a third terminal, the first terminal of said transistor switch being connected to the input voltage and the third terminal of said transistor switch being connected to the first terminal of the load;
- and
- (b) an energy storage element which includes a first terminal and a second terminal, the first terminal of said energy storage element being connected to the second terminal of said transistor switch and the second terminal of said energy storage element being connected to ground.
A timer switch for protecting a load from the voltage irregularities of an input voltage, the load having a first terminal and a second terminal, the second terminal of the load being connected to ground, said switch comprising:
- (a) a transistor switch;
- and
- (b) a timing element connected to said transistor switch, said timing element comprising exactly one energy storage element.
Dependencies are inferred from the claim text.