Patent ID: 6958671
Filing Date: 2005-10-25
Classification: H01H

Abstract:
1. An electrical contactor for connecting and disconnecting an electrical power source to an electrical device, wherein the electrical power source is electrically connected to a line terminal and the electrical device is electrically connected to a load terminal having an electrical contact, comprising: (a) an electromagnetic element electrically coupled to the electrical power source for generation of a magnetic field; (b) a slidable carrier having a distal end and a proximal end; (c) an armature affixed to said distal end of said slidable carrier, said armature attracted to said electromagnetic element upon generation of said magnetic field; (d) a blade affixed to said proximal end of said slidable carrier, said blade having a first electrical contact aligned with a stationary electrical contact and a second electrical contact aligned with the load terminal electrical contact, said first and second electrical contacts electrically connecting the electrical power source to the electrical device upon generation of said magnetic field and electrically disconnecting the electrical power source to the electrical device upon removal of said magnetic field, the blade further being asymmetrical to provide sequential contact and separation between said first electrical contact and said stationary electrical contact and said second electrical contact and the load terminal electrical contact; and (e) a positive temperature coefficient resistivity element electrically coupled to said stationary electrical contact and said load terminal electrical contact for providing arc suppression during the opening and closing of said first and second electrical contacts and said stationary electrical contact and the load terminal electrical contact.