Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1984-08-20
1986-12-09
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250237G, G01D 534
Patent
active
046282009
ABSTRACT:
A pulse wheel system including a pulse wheel and first and second detectors responsive thereto for providing first and second pulse trains having a predetermined phase shift between them. The detectors are mounted on a mounting plate which positionally relates the first and second detectors to the center of the pulse wheel, eliminating set-up adjustments.
REFERENCES:
patent: 3098152 (1963-07-01), Von Mathes
patent: 3995156 (1976-11-01), Angersbach et al.
patent: 3997782 (1976-12-01), Willits
patent: 4033883 (1977-07-01), Zinsmeyer et al.
patent: 4196349 (1980-04-01), Yamada
patent: 4328463 (1982-05-01), Avins
patent: 4386270 (1983-05-01), Ezekiel
Lackey D. R.
Nelms David C.
Westinghouse Electric Corp.
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