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:
Nov. 05, 2002
Filed:
May. 22, 2001
Kazunori Takahashi, Tokyo, JP;
Asahi Seimitsu Kabushiki Kaisha, Tokyo, JP;
Abstract
A linear-motion helicoid mechanism for a CCTV camera, comprising a lens frame for holding lenses, a key member, a helicoid female member and a rotating frame that is formed integrally with the helicoid female member. The lens frame comprises a cylindrical lens holder having helicoids and keyways on an outer periphery of the cylinder. The key member comprises a cylindrical part having keys for engagement with the keyways provided on the key member. The helicoid female member comprises a cylindrical part having helicoids that engage with the helicoids of the helicoid female member. The rotating frame and the helicoid female member are engaged together with a bayonet mechanism, so that the rotating frame fixes a position of the helicoid female member to the key member in the optical axis direction and supports it rotatably about the optical axis.