G - Physics – 01 – D
Patent
G - Physics
01
D
341/106, 340/135
G01D 5/20 (2006.01)
Patent
CA 1204483
TITLE: COMPACT REAL TIME CONTROLLER WITH IMPROVED MAGNETIC CHARACTERISTICS ABSTRACT OF THE DISCLOSURE The present invention relates to an improved position monitoring system for use in monitoring the positional relationship of two members mounted for relative movement with respect to each other. In such apparatus, a pair of magnetic fields are juxtaposed to each other such that they have opposite polarity and are of such a field strength that they provide for a generally linear variation in field strength extending over an elongated path which traverses the abutment of said fields. In a preferred embodiment, such a system is employed as an integral part of an electromagnetic actuator wherein the magnetic fields interact with the electromagnetic fields of a suitably positioned field coil. The monitoring is used to provide closed loop control of the positional relationship between the two members.
435230
Petersen Christian C.
Westgate Bernard C. Jr.
Polaroid Corporation
Smart & Biggar
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