Magnetic key switch having a removable support assembly

Details Magnetic key switch having a removable support assembly Magnetic key switch having a removable support assembly

1974-11-20

1978-07-04

Curtis, Marshall M.

Communications: electrical

Audible indication

Percussion-type sound producer

340365R, H03K 1702, H01C 716

Patent

active

040991768

ABSTRACT:
A keyboard switch employing a saturable magnetic core and a pair of permanent magnets attached to a key stem is disclosed. When the key is not depressed the saturable magnetic core is saturated by the adjacent magnets, and when the key is depressed the core becomes unsaturated. The magnetic core and the associated drive and sense wires are secured in a plastic support assembly. The plastic housing of the switch and the support assembly are constructed so that the support assembly may be secured in place in the plastic housing and may also be removed from the housing when connection to a printed circuit board is to be made.

REFERENCES:
patent: 3142742 (1964-07-01), Kaleba et al.
patent: 3558875 (1971-06-01), Gabor
patent: 3676630 (1972-07-01), Dennison
patent: 3714611 (1973-01-01), Madland
patent: 3719902 (1973-03-01), Esterly
patent: 3765014 (1973-10-01), Taylor

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