Electromagnetic radiation intensity comparator apparatus

Details Electromagnetic radiation intensity comparator apparatus Electromagnetic radiation intensity comparator apparatus

1975-10-10

1977-06-28

Heyman, John S.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307355, 307362, 330 30D, 352140, 354 24, 354 25, 356 4, G03B 708, G03B 300, H03F 345

Patent

active

040328015

ABSTRACT:
An electromagnetic radiation intensity comparator is disclosed for providing an indication of differences between electromagnetic radiation intensities occurring at different photodetectors.

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patent: 3435257 (1969-03-01), Lawrie, Jr.
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patent: 3638050 (1970-04-01), Harp
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patent: 3770967 (1973-11-01), Hanna et al.
patent: 3779142 (1973-01-01), Yata et al.
patent: 3822387 (1974-07-01), Mulder
patent: 3877039 (1975-04-01), Ichinohe et al.
patent: 3896456 (1975-07-01), Toyoda

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