Miniature contactless switching unit

Details Miniature contactless switching unit Miniature contactless switching unit

1977-05-12

1979-05-29

Heyman, John S.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307239, 338 32H, 338 32R, 200 84C, 340365L, H01L 4306, H01H 3600

Patent

active

041568206

ABSTRACT:
A miniature contactless switching unit is disclosed for use in various kinds of position sensors with a magneto-electro converter. The miniature contactless switching unit includes a molded block case in which a permanent magnet and the magneto-electro converter are oppositely disposed, and a screening member for screening magnetism, which operates in accordance with the movement of a moving member, whereby when the moving member is in a first position, the screening member is not disposed between the magnet and the magneto-electro converter to hold the output of the converter in a first switching state, while when the moving member is in a second position, the screening member is disposed between the magnet and the converter so as to prevent the magnetic flux from said magnet to the converter to hold the output of the converter in a second switching state.

REFERENCES:
patent: 3652878 (1972-03-01), Schmidt
patent: 3668596 (1972-06-01), Hubrich
patent: 3681733 (1972-08-01), Masuda et al.
patent: 3737829 (1973-06-01), Schneider
patent: 3848216 (1974-11-01), Gamble
patent: 3873957 (1975-03-01), Wurscher et al.

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