Inventors:
Robert W. Nickerson - Chelmsford MA
James C. Taylor - Lynn MA
Gregory W. Swider - Woburn MA
Assignee:
Rockwell Automation Technologies, Inc. - Mayfield Heights OH
International Classification:
H01H 530
US Classification:
200447, 200 16 A, 200273, 200 47
Abstract:
A switch comprises a first and second contacts, a plunger, a toggle bar, and a spanner. A preferred trip lever arrangement is used in which a trip lever transfers an actuating force from the plunger to the toggle bar, and the toggle bar is caused to move farther than the plunger to provide a short trip point. Swing arms that are acted upon through a series of rigid body force transfers allow an operator to manually force welded contacts to be broken in the event that the contacts become welded to a spanner or other components of the switch assembly.