Accession Number : ADD003579

Title :   Optical Window Protective Shutter Mechanism.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Dinges,Richard A ; Weber,Morris

Report Date : 25 Jan 1977

Pagination or Media Count : 14

Abstract : A visor-like, protective hood assembly consisting of a segmented shutter for covering an optical window and including three hemispherical shutter segments of increasing radii and pivoted about a common pivot for relocation between a retracted, open and nested relation and an extended, closed position. A drive motor, coupled with a Geneva mechanism, directly and intermittently drives the outermost shutter segment, and trailing edge lips on each segment engage with and respectively drive the intermediate and inner segments to their fully extended, closed positions in a protective relation over the window. (Author)

Descriptors :   *Patents, *Shutters(Optics), Protective coverings, Windows

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE