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:
May. 03, 1977
Filed:
Jun. 30, 1975
Kayoshi Tsujimoto, Osaka, JA;
Toru Matsui, Sakai, JA;
Abstract
An improvement is made in a camera wherein the exposure is controlled by an electronic circuit comprising a photoelectric element so situated as to receive a light reflected from the surface of photographic film in the camera. Conventional shortcomings of the above-mentioned camera that a time delay from operation of the electronic switching circuit to an actual completion of closing of the already opened shutter has been liable to cause an over-exposure and that an exposure period shorter than the delay has been impracticable can be eliminated by employing another photoelectric element which continuously receives a light from the object and influences a current to flow into a timer circuit. Moreover, by means of a change-over switch, the circuit is switched so as to be controlled substantially by the second photoelectric element in case the photographic object is so bright as to necessitate a high speed exposure faster than the time delay.