Quieted fast acting switch assembly with visco-elastic polymer laminated between metal layers

摘要

A relatively quiet switch assembly having a plurality of spaced contact sets with snap-acting transfer actuation and interconnected by a common bus plate. The bus plate is formed of a swandwich construction having a thin (0.001 Inch) core layer of visco-elastic polymer and thicker layers of copper bonded to both sides of the core layer for sound attenuation upon contact transfer. Where the bus plate is formed to a right-angle bend of R/t-1.2 the inner layer is formed of half-hard material and the outer layer of fully annealed material.