Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-03-06
1991-10-08
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250351, G01D 536
Patent
active
050556738
ABSTRACT:
A radiation chopper has a chopper disk 9 which is driven by an electromotor 8 and disposed between a front and a rear part of the housing 2, 3 placed on top of each other wherein the rear part 3 of the housing has a multi-armed yoke 5 and the front part 2 of the housing has a support for at least one cell and at least one aperture 17, 18 permitting the radiation to pass from the chopper chamber 10 to the cell and at least one support 38, 39 disposed at the rear part 3 of the housing for mounting the radiation source. At each of its two ends, the motor 8 for driving the chopper disk 9 has one bearing collar 13, 15 of which the one in the rear can be inserted into a borehole 14 provided in the multi-armed yoke 5 which in turn is connected to supports 4, 4', . . . that are configured as one piece with the rear part 3 of the housing and the front bearing collar 15 engages a borehole 16 which is provided at the bottom of the supports 4, 4', . . . in the rear part 3 of the housing.
REFERENCES:
patent: 3693024 (1972-09-01), Hulle et al.
patent: 4132890 (1979-01-01), Garcia et al.
patent: 4155010 (1979-05-01), Schunck et al.
patent: 4719352 (1988-01-01), Miyatake et al.
Leybold Aktiengesellschaft
Nelms David C.
Shami K.
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