Electricity: circuit makers and breakers – Electric switch details – Actuators
Patent
1977-06-10
1978-09-26
Scott, James R.
Electricity: circuit makers and breakers
Electric switch details
Actuators
200 5A, 200159B, 200330, H01H 312, H01H 1370
Patent
active
041172922
ABSTRACT:
An economical yet versatile dual spring actuator switch assembly providing an excellent tactile impression includes a planar switch closure assembly having domed protrusions extending from a surface thereof to provide switch closure when depressed and a switch actuator assembly. The easily assembled switch actuator assembly includes a cover plate with a guiding, key receiving plate aperture disposed therein opposite each protrusion, a plurality of keys, each key having a central key aperture, and a guide post within the central key aperture and being slideably received by a different plate aperture, a plurality of followers, each disposed adjacent a different protrusion and having a central aperture slideably receiving a guide post in guiding, mating relationship, a plurality of first springs, each maintaining a repulsive force between a different key and the surface, and a plurality of second springs, each coupling a different key to a follower to communicate a switch closure force to a protrusion upon depression of a key. The double spring arrangement permits independent selection of key and protrusion actuation forces and buffers each protrusion from its associated key for longer switch lifetime.
REFERENCES:
patent: 3582594 (1971-01-01), Twyford
patent: 3773997 (1973-11-01), Evans et al.
patent: 3773998 (1973-11-01), Seeger, Jr. et al.
patent: 3777082 (1973-12-01), Hatley et al.
patent: 3777090 (1973-12-01), Muller
patent: 3856998 (1974-12-01), Sims, Jr.
patent: 3860771 (1975-01-01), Lynn et al.
patent: 3993884 (1976-11-01), Kondur et al.
Hayes James Christopher
Tobin William James
Scott James R.
Telaris Telecommunications Inc.
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