Electricity: circuit makers and breakers – Multiple circuit control – Reciprocating contact
Patent
1985-03-08
1986-07-15
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Reciprocating contact
200159R, 200264, 200276, H01H 1352, H01H 1500, H01H 102, H01H 106
Patent
active
046008195
ABSTRACT:
A switch assembly particularly suitable for electrical keyboard applications includes a pair of wire conducting members disposed in substantially collinear relationship on a supporting base and defining a pair of switch contact surfaces disposed radially outward from the circumference of the wire conducting members. In one embodiment, surrounding the exterior of the collinearly disposed wire conducting members, and spaced from and in facing relationship with the contact surfaces thereof, lies a cylindrical or tubular contactor member. The contactor member may include a closely-wound electrically conductive wire. The contactor member is supported in spaced apart position by a resilient sealing tube which encloses the end portions, including the contact surfaces, of the wire conducting members. A spring biased actuating force is provided to move the sealing tube and contactor member into engagement with the contact surfaces. The spring force is provided by a rubber-like spring member disposed adjacent to the sealing tube and deformable, or deflectable, laterally into force transmitting engagement with the sealing tube to cause the switch to close. In another embodiment, cylindrical conductive rubber sleeves are fitted upon the wire conducting members and the spring member is likewise formed of conductive rubber. In still another embodiment, the spring member includes a conductive rod that contacts the wire conducting member directly.
REFERENCES:
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patent: 4295699 (1981-10-01), Du Rocher
patent: 4418252 (1983-11-01), Daigle
patent: 4473727 (1984-09-01), Beck
Mechanical Enterprises, Inc.
Scott J. R.
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