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.:

US 6741806 B1

PDF
Full Text
Expired
Date of Patent:
May. 25, 2004

Filed:

May. 20, 2003
Applicant:
Inventors:

Yuji Mikami, Minami-Ashigara, JP;

Kazuo Kamata, Minami-Ashigara, JP;

Takeshi Masuda, Minami-Ashigara, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 1/702 ;
U.S. Cl.
CPC ...
G03B 1/702 ;
Abstract

A stop lever is rotatable on a light shielding tunnel with an exposure aperture. When the stop lever is at a fast shutter speed position, a support pad is located below a lower metal plate of a synchronization switch of a flash circuit. The support pad holds the lower metal plate to limit rotation of a shutter blade, so that photography is carried out at a fast shutter speed. The synchronization switch is turned on after the exposure aperture is fully open. When the stop lever is at a slow shutter speed position, a support pad is away from the lower metal plate to obtain a slow shutter speed. It is possible to obtain a fast shutter speed by providing a light shielding tunnel with a fixed stopper to limit rotation of the shutter speed, and a slow shutter speed by providing a light shielding tunnel without a stopper.


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Mikami, Yuji. (2004). Lens-fitted photo film unit and method for manufacturing lens-fitted photo film unit (U.S. Patent No. 6741806). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6741806

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