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
Vibration applying assembly
Compressed articles with microencapsulation
Operation management apparatus, operation management method, and program storage medium
Method for forming openings in semiconductor device
Chest compression devices for use with imaging systems, and methods of use of chest compression devices with imaging systems
On-chip millimeter wave lange coupler
Memory bus write prioritization
  Randomly Featured Patents
Combined bed and wheelchair
Roll-over protective system for tractors
Prophylaxis of arterial disease
Gear selector for bicycle hub transmission
Roll form medical bandaging product
Method for improved location determination accuracy using filtered and unfiltered ranging signals
Substrate processing apparatus and substrate handling method
Method and apparatus for producing titanium dioxide
Electrically driven blow molding machine
Megakaryocytopoietic factor