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.

Abstract: An improved connector having a printed wiring board structure and integrally connected to a printed wiring board. The connectors are suitable for use as part of a printed wiring board having a metal substrate. The connectors are finger-like structures, which mate either with other finger-like structures or with apertures in a printed wiring board. Both soldered and solderless connectors are disclosed.

Abstract: An improved printed wiring board having a substrate disposed in at least two major planes and having conductors affixed to the substrate traversing between the at least two major planes. Further a method of manufacturing such an improved printed wiring board having a metal substrate is disclosed.