Hermetically sealed electrical switch with pressure regulating getter means

摘要

A hermetically sealed, partially evacuated switch is maintained at a non-oxidizing residual pressure of from about 10-1 to 102 Torr by inclusion of selected hydrogen gettering metal hydride within the sealed switch envelope. The metal hydride is selected with a hydrogen equilibrium pressure at the switch operating temperature such that the pressure within the switch envelope is maintained in the desired range.