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:
Jul. 12, 1977
Filed:
Aug. 28, 1975
Tsukumo Nobusawa, Minami Oizumi, JA;
Abstract
An electronic flash apparatus to be used for photographing purposes and controlled by a digital memory system. A flash structure provides flash illumination while an oscillator circuit produces pulses the frequency of which is determined according to a factor such as the light intensity or the distance of the object from the flash apparatus, and these pulses are counted by a memory device which is set to terminate the counting of the pulses according to one or more parameters such as the film speed, the diaphragm aperture, or the like. The flash illumination is terminated by a flash control structure actuated either according to the number of pulses counted or according to the time interval required to count a given number of pulses.