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. 28, 2004
Filed:
Jan. 28, 2003
Kazuo Kamata, Minami-Ashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A shutter device has a shutter drive lever striking a shutter blade to expose an exposure opening, a mooring lever, a cam, and a speed governor. The speed governor includes an escapement wheel with integrally formed two gear wheels, an anchor, and a movable mounting board on which the escapement wheel and anchor are mounted. One of the gear wheels of the escapement wheel is engaged with a claw of the anchor to slow down a rotational speed of the escapement wheel. The other gear wheel is engaged with a shutter speed adjustment gear formed in a periphery of the shutter drive lever. The shutter drive lever rotates at the same rotational speed as the escapement wheel, so that exposure time becomes long. When flash charge is turned off, the mounting board moves to an evacuation position in which the escapement wheel is disengaged with the shutter speed adjustment gear.