Richard A Sturley

US Patent:

41829859, Jan 8, 1980

Filed:

Apr 14, 1978

Appl. No.:

5/896402

Inventors:

Douglas DeWolfe - East Syracuse NY
Richard A. Sturley - Kirkville NY
Francis E. McPhilmy - Chittenango NY

Assignee:

Carrier Corporation - Syracuse NY

International Classification:

G01R 3312

US Classification:

324220

Abstract:

Apparatus for locating the position of at least one magnetic member relative to a nonmagnetic member includes a probe assembly movably disposed within the nonmagnetic member and including a nonmagnetic head having a pair of spaced permanent magnets mounted thereon. Each magnet has a variable resistor connected thereto, the resistance of each resistor varying directly with the strength of the flux field emanating from each magnet. The resistors are connected to a source of electrical energy for providing an electrical control signal, the magnitude of which varies in response to the movement of the probe assembly including the magnets and resistors relative to the magnetic member.