Resources Contact Us Home
Flash photography apparatus

Image Number 6 for United States Patent #4542974.

In the disclosed flash unit, a preliminary flash for evaluating a proper exposure precedes a main flash. A flash exposure control apparatus respond to tilting of the flash's head after a preliminary flash to present a warning signal, or to renew the preliminary flash and thereby to readjust the aperture to the new exposure condition.

  Recently Added Patents
Dynamic constraint satisfaction problem solver with part-whole hierarchy constraints
Power supply controller and method
Three-dimensional semiconductor memory device
Image forming apparatus
Flexible endoscopic catheter with ligasure
Antenna apparatus and radio communication apparatus
Oscillating kingpin structure for grain trailer
  Randomly Featured Patents
High mannose proteins and methods of making high mannose proteins
Funnel for reloading cartridges
Energy-saving heat exchanger
Valve cover sealing arrangement
Preparation of high resiliency polyurethane foams
Seed-preferred promoters from end genes
Grass hopper cart
Boron-containing compositions, and lubricants and fuels containing same
Recording apparatus
Side window shade with contour part