Magnetically operated proximity switch

Details Magnetically operated proximity switch Magnetically operated proximity switch

1978-07-20

1980-07-01

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Permanent magnet-actuated switches

Plural magnets

335153, 335205, H01H 3600

Patent

active

042108888

ABSTRACT:
A magnetically operated proximity switch for use in physical security monitoring systems, machinery control systems, and the like, comprising a magnetic reed switch having permanent magnet biasing means associated therewith for controlling the sensitivity of the switch to the proximity of an external magnetic field. The reed switch is enclosed in an elongate glass capsule and the magnet of the biasing means is attached to the capsule with its axis of polarity parallel to the reed of the reed switch by means of either a slidable carrier or heat shrinkable tubing. The means of attachment of the biasing magnet to the reed switch capsule allows adjustment of the position of the biasing magnet to control sensitivity of the reed switch. Protective mounting means is provided for attaching the switch and biasing magnet to an object.

REFERENCES:
patent: 2912540 (1959-11-01), Sawicki
patent: 3222758 (1965-12-01), Marks
patent: 3243544 (1966-03-01), Mayer
patent: 3252057 (1966-05-01), Hoeppel
patent: 3260821 (1966-07-01), Yokoo
patent: 3668579 (1972-06-01), Harman
patent: 3806852 (1974-04-01), Suska
patent: 3967224 (1976-06-01), Seeley

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