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. 14, 1979
Filed:
Oct. 18, 1977
Shuji Kimura, Yokohama, JP;
Shigeo Akasaka, Kodaira, JP;
Koichi Daitoku, Tokyo, JP;
Hiroshi Hasegawa, Tokyo, JP;
Makoto Kimura, Tokyo, JP;
Nippon Kogaku K.K., Tokyo, JP;
Abstract
A shutter device in a camera which effects photography with shutter curtains maintained open for a predetermined time comprises a rotatable member for normal rotation by a spring, shutter opening formation means operatively associated with the rotatable member to move in a direction to form a shutter opening with normal rotation of the rotatable member and to move in a direction to close the shutter opening with reverse rotation of the rotatable member, a motor, control means operatively associated with the motor to be displaceable to a first position in which it blocks normal rotation of the rotatable member and maintains the shutter opening closed, a second position in which it permits the normal rotation of the rotatable member by the bias force of the spring immediately after the motor is started, and a third position in which it transmits the drive of the motor to the rotatable member so as to reverse the rotation of the rotatable member after the normal rotation thereof, means for stopping normal rotation of the rotatable member, and motor control means for starting the motor in response to an extraneous operating signal for starting photography, for stopping the motor after the normal rotation of the rotatable member by the bias force of the spring is started, for starting the motor in response to an extraneous signal for terminating the photography, and for stopping the motor when the shutter opening has reached its closed position.