Hartmann & Braun Ag

Wilhelm-Rudiger Haberditz

Joachim Staab

Willy Apel

Walter Fabinksi

Achim Drager

A cylindrical block is provided with two ducts, forming a V whose legs terminate in exit windows in one axial end face of the block. A light source is disposed in the bottom of the V to direct light into both ducts. The block is further traversed by a bore, terminating as to one end in between the windows, avoiding the ducts and terminating in an offset position relative to the V-bottom and the light source at the other end of the block. A shaft traverses this bore for rotating a shutter in front of the windows. A complementary, light receiving unit is disposed with misaligned entrance windows in front of the unit windows, but their centers are traversed respectively by the optical axes of the ducts.

Growing community of inventors

Steinbach/Ts., Germany

Wilhelm-Rudiger Haberditz