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:
Sep. 14, 1976
Filed:
Apr. 10, 1975
Arthur Schneider, Volkenrode, DT;
Rollei-Werke Franke & Heidecke, Braunschweig, DT;
Abstract
Photographic flash apparatus having one flash unit which may be called the main or master or primary flash unit, and one or more additional flash units which may be called secondary or slave or dependent units. Eliminating connecting cables often used in the prior art, and also eliminating ratio frequency controls sometimes used in the prior art relating to multiple units, the secondary or dependent units of the present invention are independently powered and are triggered to initiate a flash by the light from the flash of the main unit, and triggered to terminate or discontinue the flash in each dependent unit when the flash in the main unit turns off. The control of each secondary unit is entirely by means of the flash of light from the main unit. The apparatus is particularly useful in studio lighting where it is desired to illuminate the subject being photographed from a plurality of different directions.