Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-04-29
1990-01-09
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250237G, G01D 534
Patent
active
048930075
ABSTRACT:
The invention relates to a device or arrangement for measuring the angle of rotation of the rotor of a rotary machine. Markings are applied circumferentially to a part of the rotor that is enclosed by the housing and a passage is provided in the housing which has an opening adjacent the markings. A sensor arrangement disposed at least partly in the housing passage has one end thereof adjacent the markings in a position for detecting the rotational movement of the markings. The snesor arrangement may have electrical, magnetic or optical capabilities.
REFERENCES:
patent: 4639595 (1987-01-01), Okita et al.
patent: 4641027 (1987-02-01), Renner et al.
patent: 4713539 (1987-12-01), Hackman
patent: 4724317 (1988-02-01), Brown et al.
patent: 4740689 (1988-04-01), Swiden
Blohm Knud
Espensen Ib M.
Gade Niels H.
Stannow Jorgen C.
Wolff Bruno
Danfoss A/S
Easton Wayne B.
Johnson Clayton R.
Nelms David C.
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