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:
Jun. 16, 1981
Filed:
Apr. 20, 1979
Kunio Arisaka, Urawa, JP;
Kenta Namioka, Tokyo, JP;
Copal Company Limited, Tokyo, JP;
Abstract
An electric shutter device wherein an armature lever is attracted by an electromagnet by making a large current flow to the electromagnet only when the operation of a self-timer ends so that a normal exposure operation may be thereby started in order to minimize the power consumption during the operation of the electric self-timer. This electric shutter device is provided with a pair of shutter blades which are also diaphragm blades, a closing drive plate engageable with the armature lever to control the opening and closing of the shutter, an exposure time controlling circuit controlling the energizing time of the electromagnet to determine a proper exposure time, an exposure warning circuit and a flash controlling circuit.