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:
May. 08, 1979
Filed:
Oct. 03, 1977
Donato F Pizzuti, Saugus, MA (US);
Charles W Triggs, Marshfield, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
In a variable focus lens system in general, or in a photographic camera having such a system in particular, a simplified, compact, combination manual and automatic focus conrol system is provided having manual and distance responsive automatic focus controls that are coupled to one another in a driving relationship. Included with said focus control system is a displaceable cover that impedes access to the actuator of said manual focus control to prevent simultaneous manual and automatic focus control actuation. Cover movement is accomplished by rotating a light shielding collar member that is mounted for rotation about the principal image forming axis of said variable focus lens system, said cover being coupled to said collar for movement therewith.