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. 08, 1980
Filed:
Aug. 03, 1978
Edwin H Land, Cambridge, MA (US);
Conrad H Biber, Needham, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
An electronic flash device is preferably powered by a high voltage, generally planar multicell battery having a low internal impedance and a high current discharge capability to enable a flash storage capacitor to be quickly charged upon the battery being directly connected to the capacitor. Actuation of a photographic cycle initiating button on an associated camera operates to directly connect the battery to the flash storage capacitor thereby enabling the capacitor to be quickly charged to its required voltage in readiness to provide an illuminating flash of light during the exposure interval which commences at a minute time after the button actuation.