Position and motion detector with magnetic coupling and optical

Details Position and motion detector with magnetic coupling and optical Position and motion detector with magnetic coupling and optical

1990-03-30

1991-09-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023113, G01D 534

Patent

active

050476297

ABSTRACT:
The position, velocity and/or acceleration of one portion (22A) of an apparatus relative to another portion (20) of the apparatus is measured with a hermetically enclosed sensor (100) having therein, a moveable armature (104) magnetically coupled to the apparatus through a wall (108) of the hermetic enclosure (102) so as to move in a predetermined direction (116) in response to relative motion (30) of the apparatus, combined with an optical detector (110, 112, 114) extending within the same hermetic enclosure (102) for measuring the position and/or motion (116) of the magnetically coupled armature (104) responding to the relative motion (30) of the apparatus.

REFERENCES:
patent: 3892961 (1975-07-01), Bachmann
patent: 4296410 (1981-10-01), Higgs et al.
patent: 4356397 (1982-10-01), Lenderring et al.
patent: 4403144 (1983-09-01), Strahan et al.
patent: 4448555 (1984-05-01), Hasegawa
patent: 4459759 (1984-07-01), Hulsing
patent: 4536708 (1985-08-01), Schneider
patent: 4590425 (1986-05-01), Schonstedt
patent: 4674767 (1987-06-01), Koroki et al.
patent: 4676097 (1987-06-01), Tusting
patent: 4746791 (1988-05-01), Forkel
patent: 4796966 (1989-01-01), Koveleski et al.
patent: 4843886 (1989-07-01), Koppers
patent: 4887583 (1989-12-01), Lin

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