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:
Dec. 07, 1982
Filed:
Apr. 10, 1981
Kazuyuki Kazami, Tokyo, JP;
Yoshiaki Ohtsubo, Kawasaki, JP;
Nippon Kogaku K.K., Tokyo, JP;
Abstract
A shutter control device for a camera having an automatic exposure time control device provided with a comparator circuit for comparing a time output corresponding to the lapse of time from the opening operation of a shutter with a proper shutter speed output representing a proper shutter speed and for generating a comparison output when the two outputs are in a predetermined relation and a magnet for blocking the closing operation of the shutter by energization, the magnet being adapted to be deenergized in response to the comparison output to close the shutter, and a shutter release lock device provided with voltage detecting means for detecting a power source voltage and for deenergizing and magnet before the opening operation of the shutter when the power source voltage is below a reference value and blocking means for blocking the opening operation of the shutter by the deenergization of the magnet before the opening operation of the shutter includes means for forcibly energizing the magnet until the start of the opening operation of the shutter in response to shutter release operation. The means for forcibly energizing the magnet becomes operative in response to the output of the voltage detecting means when the power source voltage is greater than the reference value.