Electric control device with improved arc extinguishing means

Details Electric control device with improved arc extinguishing means Electric control device with improved arc extinguishing means

H - Electricity

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H

306/225

H01H 33/18 (2006.01) H01H 9/44 (2006.01)

Patent

CA 1146199

48,231 ABSTRACT OF THE DISCLOSURE This invention is related to the problem of eliminating high carrying arcs at the contacts of electric control devices that causes pitting at the contacts, reduces contact life, and limits current interrupting capabilities. The object of this invention is to elimin- ate current arcs at the contacts by using permanent magnet means to pull the arc or stress the arc away from the contact thus eliminating it. This invention uses a novel approach of utilizing multiple magnetic arrangements with magnets placed on a movable member which moves with the movement of the contacts as they go from one operating po- sition to another, thus changing and varying the strength of the magnetic field across the axis of movement of the contacts thereby pulling and stretching the arc away from the contact and thus eliminating current arcs that reduce contact life.

359956

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