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:
Sep. 21, 1976
Filed:
Jun. 05, 1975
Sachio Ohmori, Yokohama, JA;
Shuji Kimura, Yokohama, JA;
Nippon Kogaku K.K., Tokyo, JA;
Abstract
Rotary shutter blade mechanism includes at least a shutter blade which rotates always in one direction. The driving energy of the shutter blade is recovered by a driving spring in the course of deceleration of the blade. An auxiliary actuating means is adapted to supply one directional rotative force to the driving shaft of the blade. A rotary cam means is secured to the driving shaft and has at its periphery at least one pair of accelerating portions and decelerating portions. A reciprocating lever means is pivotally mounted in the body portion of the mechanism. The lever means has a portion engageable with the accelerating and decelerating portions. A main actuating means urges the lever means so that the engaging portions may contact the rotary cam means. The driving shaft is locked when the respective foremost ends of the accelerating portions are engaged with the engaging portion of the lever means. The accelerating portions are designed to receive pivotal motion of the lever means while pressed at said engaging portion by urging force of the main actuating means for rotating said cam means in said one direction when the lock on said driving shaft is released, while said decelerating portions are so designed as to pivot said lever means with rotation of said cam means through said engaging portion in the direction opposed to the urging force of said main actuating means and to let said lever means return to its original position for stopping said driving shaft, and said cam means is so formed that the foremost end of said accelerating portions will be positioned adjacent to the rearmost end of said decelerating portions.