Patent ID: 6265955
Filing Date: 2001-07-24
Classification: H01H

Abstract:
A sealed electromagnetic relay assembly comprising:a relay having a plurality of leads for connection to external circuitry;a hermetically sealed housing assembly enclosing the relay, the housing assembly comprising:a base supporting the relay; the base including an evacuation tube, the evacuation tube being in fluid communication with an interior chamber of the housing assembly, wherein ambient air may be evacuated from the housing assembly to a vacuum within the range of about 10-.sup.5 Torr or less and wherein the housing assembly after evacuation is backfilled with an insulative gas to a pressure of 1.5 atmospheres,a hollow assembly attached to the base, the hollow assembly defining an interior chamber surrounding the relay;terminal pins connected to the relay leads, the pins extending through a wall of the hollow assembly;an upper closure, the upper closure being attached to and closing off the hollow assembly; andan impermeable potting cup surrounding the sealed housing assembly, the potting cup being adapted to receive the base at one end and being open at the other end for the receipt of encapsulating material, wherein the encapsulating material seals the housing assembly, and the relay leads extending outward from the housing assembly, against ambient air intrusion.