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Rechargeable camera having operational inhibit of a flash unit power storage circuit during recharging

  • US 5,602,458 A
  • Filed: 10/05/1995
  • Issued: 02/11/1997
  • Est. Priority Date: 08/16/1993
  • Status: Expired due to Fees
First Claim
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1. A rechargeable camera comprising:

  • a camera power switch selectively operable between an "on" position and an "off" position;

    a battery circuit that receives electrical energy from a camera secondary battery;

    a camera flash unit having a flash tube and a power storage circuit that includes an oscillator transistor and a flash trigger capacitor that receives and stores electrical energy from the battery circuit via the oscillator transistor when the camera power switch is in the "on" position such that the flash trigger capacitor can release the stored electrical energy to power the flash tube;

    a recharging connector adapted to mate with a charging device and thereby receive electrical energy from the charging device and provide the electrical energy to the battery circuit, wherein;

    the power storage circuit oscillator transistor is automatically grounded if the camera power switch is in the "on" and the recharging connector is mated with the charging device, thereby placing the oscillator transistor in a non-conducting condition and preventing the flash trigger capacitor from receiving and storing electrical energy from the battery circuit and permitting the secondary battery to receive the charging electrical energy instead.

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