Patent ID: 6661321
Filing Date: 2003-12-09
Classification: H01H

Abstract:
An electromagnetic switch comprising:an electromagnetic module including a first housing half and first and second electromagnetic members mounted in said first housing half, each of said first and second electromagnetic members including a coil, a yoke, and an armature movable when actuated by said yoke upon application of an electric current to said coil; a contact module including a second housing half connected to said second housing half and having a top wall, said contact module further including a fixed contact member and a movable contact member associated with said electromagnetic module, said fixed contact member being mounted in said second housing half and including conductive first and second fixed contacts and a conductive third fixed contact spaced apart from said first and second fixed contacts, said movable contact member being mounted in said second housing half and including conductive first and second movable contacts which are vertically and respectively aligned with said first and second fixed contacts, and a conductive third movable contact which is electrically connected to said first and second movable contacts and said third fixed contact, said movable contact member being rotatable relative to said fixed contact member among a first angular position, in which said first movable contact is in electrical contact with said first fixed contact, whereas said second movable contact is spaced apart from said second fixed contact when said coil of said first electromagnetic member is actuated, thereby establishing a first circuit passing through said first fixed contact, said first movable contact, said third movable contact, and said third fixed contact, a second angular position, in which said second movable contact is in electrical contact with said second fixed contact, whereas said first movable contact is spaced apart from said first fixed contact when said coil of said second electromagnetic member is actuated, thereby establishing a second circuit passing through said second fixed contact, said second movable contact, said third movable contact, and said third fixed contact, and a normal angular position, in which said first and second movable contacts are spaced apart from said first and second fixed contacts, respectively, when said coils of said first and second electromagnetic members are disabled, each of said first and third fixed contacts having a blade portion extending outwardly through said top wall of said second housing half; and a socket including a socket seat and conductive first and second socket contacts mounted on said socket seat, said socket seat being formed with first and second blade slots for insertion of said blade portions of said first and third fixed contacts and for electrical contact between each of said blade portions and a respective one of said first and second socket contacts.