The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 1982
Filed:
Oct. 27, 1980
Applicant:
Inventor:
Saburo Numata, Omiya, JP;
Assignee:
Fuji Photo Optical Co., Ltd., Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
3152 / ; 315340 ; 354128 ; 354145 ;
Abstract
The amount of light to be produced in an electronic flash lamp apparatus, which is required to take a picture under proper exposure conditions, is predetermined depending on the object distance, the lens diaphragm aperture and the film speed. The actual amount of light produced in the electronic flash lamp apparatus is given as the integrated voltage of a portion only, of the discharge current that flows through the flash discharge tube. The electronic flash lamp apparatus automatically terminates the flash, when agreement between the predetermined and actual amounts of light is reached.