Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Camera to flash adapter










Image Number 4 for United States Patent #4474450.

A system and method for adapting a multi-purpose electronic flash for use with an automatic exposure control camera is disclosed. The system responds to a ready signal from the multi-purpose flash and a reference signal from the automatic exposure control camera by providing a signal representative of the correct aperture for a given film speed (ASA) and range of flash to subject distances. Film speed is provided to the system by setting one portion of a variable resistance, while range is provided to the system by setting another portion of the variable resistance which is associated with a graded density optical filter located in front of the photosensor. A bipolar range about the reference signal is established to permit positive or negative signal excursions about the reference signal for indication of correct aperture. A scaling amplifier may also be provided for signal conditioning to ensure compatibility with the camera. The scaling amplifier may be arranged to provide less than unity amplification, thereby reducing system error. A special housing connects between the foot of the flash and the camera to provide access to the camera accessory shoe terminals and also to permit the flash to be operated on or off the camera. Various alternatives are disclosed.








 
 
  Recently Added Patents
Toilet
Digital broadcast receiver and method for processing caption thereof
Terminal device, system and computer readable medium
Mobile tablet information handling system support
Method and system for efficient DRX operation during handover in LTE
Micro positioning test socket and methods for active precision alignment and co-planarity feedback
Cosmetic composition based on a supramolecular polymer and a hyperbranched functional polymer
  Randomly Featured Patents
Gene targeting using replicating DNA molecules
Data transmitting apparatus, data receiving apparatus and data transmission control apparatus
Cell queuing in ATM switches
Dynamic driving structure for the ornamental music box
Vented liquid collection device
Method and device for monitoring or for influencing the movement of a vehicle on a path
Observing a state of a digital signal and capturing the digital signal
Process for producing 5-methyl-4,5,6,7-tetrahydrothiazolo[5,4-c]Pyridine-2-carboxylic acid
Railway truck
Electrical braking device for vehicles