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:
Jan. 04, 1977
Filed:
Aug. 29, 1974
Applicant:
Inventor:
Conrad H Biber, Needham, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
3152 / ; 331112 ; 3311 / ; 354145 ;
Abstract
A photographic flash system in which the storage capacitor for a flash tube is charged only before each flash exposure by a charge control circuit actuated by a pushbutton. The control circuit responds to the discharge of the capacitor through the flash tube to stop the charging process until it is reinitiated by operation of the pushbutton.