Actuator for keyboard switches

Details Actuator for keyboard switches Actuator for keyboard switches

1980-11-21

1982-07-27

Shepperd, John W.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200159R, 200 5A, H01H 312

Patent

active

043419348

ABSTRACT:
A resilient metallic actuator and contact, for use with keyboard switches, designed to provide a specific tactile effect to the keyboard operator. The preferred actuator is a double member actuator. The first member provides a resting spring bias to the key. The second member provides a significant increase in the spring bias force slightly prior to the switch making contact. In one embodiment the actuator activates a dome like over center contact to close the switch. In an alternate embodiment the second actuator member is configured to perform the function of a contact member.

REFERENCES:
patent: 3780237 (1973-12-01), Seeger et al.
patent: 3909564 (1975-09-01), Scheingold et al.
patent: 4063054 (1977-12-01), Hirata
patent: 4099037 (1978-07-01), Hartzler
patent: 4192976 (1980-03-01), Scott

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