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Motor driven camera

  • US 4,367,937 A
  • Filed: 10/03/1979
  • Issued: 01/11/1983
  • Est. Priority Date: 03/24/1977
  • Status: Expired due to Term
First Claim
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1. A camera system comprising:

  • (A) a camera including;

    (a) first power source means for supplying a voltage,(b) an exposure control circuit connected to the first power source means,(c) first switch means connected to the exposure control circuit for switching between a first position for actuating the exposure control circuit and a second position for disabling the exposure control circuit, a connecting point between the first switch means and the exposure control circuit for forming a potential,(B) an electric drive device including;

    (d) second power source means having a voltage higher than that of the first power source means,(e) an electric drive control circuit connected to the second power source means,(f) voltage generating means connected to the second power source means,(g) resistive means connected between the second power source means and the voltage generating means,said resistive means forming a contact point for setting at the contact point a potential between the voltage generating means lower than that at the first power source means,(h) a transistor having a base connected between the voltage generating means and the resistive means and having an emitter for producing an emitter current corresponding to the base voltage,said transistor having an emitter connected to the connecting point between the first switch means and the first control circuit, said transistor having a collector connected to the driving control circuit,said transistor being set to conduct when the first switch means in in the first position and set to be inverted when the first switch means is in the second position.

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