公开(公告)号：US3876847A

公开(公告)日：1975-04-08

申请号：US44686174

申请日：1974-02-28

Applicant: SQUARE D CO

Inventor： DYKES DONALD L ,  STANBACK HARRIS I

IPC: H01H3/30 ,  H01H9/16 ,  H01H9/28 ,  H01H9/22 ,  H01H31/06

CPC classification number: H01H9/16 ,  H01H3/30 ,  H01H9/28 ,  H01H2003/3089

Abstract: An operating mechanism for opening and closing a heavy duty electrical switch is provided. The mechanism includes a switchclosing spring means, a switch-opening spring means, a manually actuated first means for charging both spring means when said switch is in an open condition, and a manually actuated second means operative, only when both of said spring means are charged, to effect discharge of the switch-closing spring means and closing of the switch. The switch-opening spring means can be either manually or automatically discharged so as to open the switch. Automatic discharge of the switch-opening spring means occurs only when a predetermined condition exists in the electrical system.