Title: Construction unit for two beam photometers

Abstract: 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.

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Inventors: Staab, Joachim (Frankfurt am Main, DT)
Apel, Willy (Frankfurt am Main, DT)
Drager, Achim (Eschhorn, DT)
Haberditz, Wilhelm-Rudiger (Steinbach/Ts., DT)
Fabinksi, Walter (Hattersheim, DT)

Application Number: 538768
Filing Date: 1975-01-06
Publication_date: 1976-01-13
Assignee: Hartmann & Braun Aktiengesellschaft (Frankfurt, DT)
Primary Class(es): 356/229 250/233, 356/433, 359/235
Other Classes:
US Patent Ref:

2227147	Dec, 1940	Lindsay	250/233.
3709600	Jan, 1973	Ganshorn	250/233.
3715153	Feb, 1973	Schunck et al.	250/233.

Other Refs: 1,389,955

Jan, 1965	FR

Primary Examiner: Smith, Alfred E.
Assistant Examiner: Rosenberger, Richard A.
Attorney: Siegemund; Ralf H.