Photo flash device

US4141057A · kind A · utility

Assignee

• The Braun Corporation · DE

Inventors

• Rolf Dietrich
• Wolfgang Eisinger · Oberursel, DE
• Hans-Eberhardt Heintke · Wächtersbach, DE
• Hans Karey · Frankfurt, DE
• Robert Oberheim · Liederbach, DE

Key dates

• Filing date: Sep 7, 1977
• Grant date: Feb 20, 1979
• Expiry date: Sep 7, 1997

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B15/0442
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A reflector of a photo flash device bounds a space for a light source. The space has an open side across which a light-transmissive shield extends that permits light from the source to issue through the opening at a first angle of emergence. A wide-angle light-transmissive shield is hinged to a frame of the first-mentioned shield and can be swung into and out of an operating position in which it is located in front of the first-mentioned shield and causes the issuing light to emerge at a larger angle of emergence. This permits a user to increase or decrease the area which he wishes to have illuminated when the device is operated.