Position transducer, particularly to determine the instantaneous

Details Position transducer, particularly to determine the instantaneous Position transducer, particularly to determine the instantaneous

1977-03-17

1978-09-26

Corcoran, Robert J.

Electricity: measuring and testing

Magnetic

Displacement

310155, 310168, 324174, G01R 3312, G01R 1102

Patent

active

041174011

ABSTRACT:
To suppress stray noise pulse in inductive pick-ups located in magnetic relation to a rotating body, typically the flywheel of an internal combustion engine, so that the instantaneous shaft position can be accurately determined, to accurately compute an ignition instant, fixed or stationary pick-up transducer is formed with an E-shaped core having outer legs and a central leg, the pick-up coil being wound on the central leg, and the magnetic element, typically a permanent magnet rotating with the shaft of the engine, having a width to match essentially only the width of the central core and passing in a plane transverse to the plane of the core, so that the outer legs of the core will act as shields against stray noise pulses. The core can be constructed as a circular element of a central core within a tubular magnetic structure, the E-shaped configuration being obtained by slotting the outer tubular structure.

REFERENCES:
patent: 2434547 (1948-01-01), Browne, Jr.
patent: 3777255 (1973-12-01), Young et al.
patent: 4005396 (1977-01-01), Fujiwara et al.

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