Compaq Computer Corporation, Inc.

Astec International Limited

Kenneth A Check

Neal George Stewart

David A Smith

A solid state safety relay comprises: a first driver circuit; a second driver circuit; a charge disconnect transistor coupled to the first driver circuit and configured to control the flow of current along a current path; a first discharge disconnect transistor coupled to the first driver circuit and configured to control the flow of current along the current path; and a second discharge disconnect transistor coupled to the second driver circuit and configured to control the flow of current along the current path. A method of isolating an energy source from a circuit current path, comprises: turning off a first discharge disconnect transistor coupled to the circuit current path; and turning off a second discharge disconnect transistor coupled to the circuit current path to permit isolation of the energy source from the circuit current path if either one of the first discharge disconnect transistor or the second discharge disconnect transistor fails.

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San Jose, CA, United States of America

Kenneth A Check