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:
Mar. 23, 1976
Filed:
Oct. 10, 1974
Tatsuya Taguchi, Tokyo, JA;
Canon Kabushiki Kaisha, Tokyo, JA;
Abstract
A separate annular actuator button surrounding the shutter release button and provided with its own mechanical stop is used to move the shutter release button just far enough to switch in the storage capacitor of a TTL light measuring system of a single-lens reflex camera. This annular button can conveniently and naturally be depressed in advance of direct manipulation of the shutter release button, assuring enough time for charging the capacitor rather than relying on the rate of direct manual depression of the shutter release button to interpose enough time between capacitor switch-in and shutter release. The capacitor charging which determines the timing of shutter closing is stopped by breaking the charging current before mirror movement or lens stop-down.