Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1978-12-18
1981-03-03
Scott, James R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200159B, 200275, H01H 106, H01H 1370
Patent
active
042543096
ABSTRACT:
A keyboard switch actuating element having a concave central portion and a lip located at the periphery of the actuating element for providing a snap-through characteristic when the actuating element is disposed even over a smooth surface and the actuating element is depressed. The actuating element is typically disposed over conductors forming switch contacts affixed to the surface of a printing wiring board and closes the circuit between such switch contacts upon depression of the actuating element. The snap-through characteristic results from a reduction of the required force to depress the actuating element as the actuating element approaches its fully depressed state.
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Haug John A.
McAndrews James P.
Scott James R.
Sharp Melvin
Texas Instruments Incorporated
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