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Delay timer for a camera

  • US 4,432,624 A
  • Filed: 02/16/1982
  • Issued: 02/21/1984
  • Est. Priority Date: 02/16/1982
  • Status: Expired due to Fees
First Claim
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1. A delay timer circuit comprising:

  • an externally controlled switch means;

    first integrated circuit timer means arranged to provide a first output signal at the end of a selected first delay period initiated by said externally controlled switch means;

    variable resistor-capacitor means for selecting duration of said first delay period;

    circuit means for connecting said first integrated circuit timer means, through said externally controlled switch means, to a DC power source;

    second integrated circuit timer means arranged to provide a second output signal for a predetermined time period initiated by said first output signal;

    transistor means activated by said second output signal;

    solenoid means arranged to mechanically activate an external load when a current is passed therethrough; and

    capacitor means arranged to discharge a current through said solenoid means and said transistor means when said transistor means is activated, and to charge when said transistor means is deactivated.

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