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
Synergistic fungicidal interactions of 5-fluorocytosine and other fungicides
Method for controlling a motor
Methods and systems for creating a tail risk hedge index and trading derivative products based thereon
Contactless electrical connector for an induction sensor, and sensor including such a connector
Bicycle carrier
Circuit board having semiconductor chip embedded therein
Method of optimizing air mover performance characteristics to minimize temperature variations in a computing system enclosure
  Randomly Featured Patents
Adjustable lumbar support mechanism for a vehicular seat
Process for forming friction materials
Vision-based highway overhead structure detection system
Methods for fabricating laminated structures using rubber tire parts
Pressure and flow control in drilling operations
Electronically ignited firearms
Anchoring device for intravenous bottle holder
Object lens driving apparatus and manufacturing method thereof
Image communication apparatus for determining a correct destination location of image data
Synthetic HIV-2 envelope genes containing modifications that lead to optimized expression in bacteria