Magnetic keyswitch with two-piece support assembly

Details Magnetic keyswitch with two-piece support assembly Magnetic keyswitch with two-piece support assembly

1976-02-02

1977-04-12

Curtis, Marshall M.

Communications: electrical

Audible indication

Percussion-type sound producer

84DIG7, 178101, 340174PM, G08C 100

Patent

active

040178501

ABSTRACT:
A keyswitch for a keyboard is disclosed that has a support assembly which holds a saturable magnetic core and drive and sense line wires for the core. A plunger and magnet assembly that is depressible relative to the housing of the switch allows a permanent magnet to be moved away from the core when the plunger is depressed so the core can come out of magnetic saturation, thereby allowing signals from the drive line to be coupled to the sense line. The support assembly is formed of a two-piece construction that utilizes two identical molded plastic parts whereby the core and drive and sense line wires can be easily inserted into and removed from the support assembly.

REFERENCES:
patent: 2913688 (1959-11-01), Slebodnick et al.
patent: 3129418 (1964-04-01), De La Tour
patent: 3696345 (1972-10-01), Visschedijk
patent: 3714611 (1973-01-01), Madland

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