| 摘要 |
The limit switch includes two parallel pivoting contact arms(20,22). The upper contact arm(20) is pivoted upon a carriage(58) which is in turn pivotally mounted upon a mechanism frame. A latch rod(29) is movably secured in arcuate slots. When the circuit interruper is in the closed cct. position, a pair of springs(66,68) urges the latch rod against a reaction surface of the upper contact arm to provide contact closing pressure. Upon occurrence of severe overload current conditions, the upper contact arm pivots upon the carriage, allowing the springs to move the latch rod against a latching arm in the open circuit position. |
