Magnetic probe

Details Magnetic probe Magnetic probe

1978-12-04

1981-05-19

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310168, H02K 2138

Patent

active

042687713

ABSTRACT:
A magnetic probe for sensing the passage of a moving magnetic element, comprising a radially magnetized cylindrical permanent magnet, formed of a flat sheet of elastomer bonded ferrite material magnetized across its smallest dimension and curled to cylindrical configuration, or formed in cup-shaped configuration. A magnetic collector core is mounted co-axially in one end of the magnet cylinder and has an axial pole piece of reduced diameter projecting to the other end of the magnet cylinder, and an electrical sensor coil encompasses the pole piece; the sub-assembly comprising the magnet, the core, and the coil is mounted in a cylindrical magnetic housing, with only high-reluctance flux paths between the inner surface of the permanent magnet and the housing.

REFERENCES:
patent: 3492518 (1970-01-01), Wayne
patent: 3942045 (1976-03-01), Palazetti
patent: 4002937 (1977-01-01), Anson

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