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:
Aug. 20, 1985
Filed:
Mar. 20, 1984
Akiyasu Sumi, Kanagawa, JP;
Tohru Kawai, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A filter mounting mechanism capable of attachment to and detachment from an optical assembly such as the interchangeable lens assembly of a single lens reflex camera is provided with a holding member arranged to rotatably carry a filter in such a manner that the filter may be rotated from externally of the optical assembly in order to enable adjustment of the filter. The mechanism includes a device for preventing the filter from becoming loosened while in use and the arrangement further operates to facilitate use of a thin film filter such as a gelatin filter in cases where such a filter is to be used by preparation and cutting thereof into a desired size and shape.