Keyboard switch

Details Keyboard switch Keyboard switch

1985-04-17

1987-07-07

Marcus, Stephen

Electricity: circuit makers and breakers

Electric switch details

Actuators

200305, H01H 312

Patent

active

046788808

ABSTRACT:
A keyboard switch is provided which comprises a substrate on the upper surface of which a flexible switch is disposed that has paired fixed and movable contacts and includes a flexible sheet, guide posts passing through and secured to the substrate at mutually opposed positions on either side of the contacts, a key plunger fitted vertically movably in the guide posts, and a coil spring interposed between the key plunger and the substrate. The coil spring functions so that it pushes the flexible switch when compressed to cause the paired contacts to come into contact with each other and, when uncompressed, returns the key plunger to the initial position thereby to separate the paired contacts.

REFERENCES:
patent: 3769869 (1973-11-01), Nelson, Jr.
patent: 3780237 (1973-12-01), Seeger, Jr. et al.
patent: 4334134 (1982-06-01), Janda
patent: 4529848 (1985-07-01), Cherry
Allan, J., Composite Switch and Cable, IBM Tech. Disclosure Bulletin, Sep. 1984, vol. 27, No. 4B, pp. 2378-2379.

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