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:
Aug. 02, 1983
Filed:
Apr. 22, 1981
Sakuji Watanabe, Warabi, JP;
Nippon Kogaku K.K., Tokyo, JP;
Abstract
A camera comprises an automatic exposure control device having a comparing circuit adapted for comparing a time output signal indicating the time from the shutter aperture opening function with a proper output signal indicating an appropriate exposure time and for releasing a comparison signal when a determined relationship is reached between said output signals, and solenoid means adapted for blocking the shutter aperture closing function when energized and being deactivated in response to the comparison signal to cancel the blocking; and a shutter release locking device having a voltage detecting circuit adapted for deactivating the solenoid means prior to the shutter aperture opening function when the power supply voltage becomes lower than a determined limit level, and blocking means for prohibiting the shutter aperture opening function in response to the deactivation of the solenoid means prior to the shutter aperture opening function. The shutter release locking device comprises a limiter circuit for supplying a signal of a determined level instead of the proper output signal to the comparing circuit thereby enabling to obtain the comparison signal therefrom in case the proper output signal exceed a determined level.