Dual voltage switch

A dual voltage transformer switch for connecting the winding segments of a transformer coil in a parallel or series relation, said switch comprising a number of switch units each including a switch block having a number of contact blades mounted thereon, said blades being adapted to be operatively connected to the winding segments, a rotor mounted within said switch block, contact means mounted on said rotor for operatively interconnecting said contact blades, said contact means including at least one bridge contact mounted on said rotor, said bridge contact including a number of double bladed fingers having curved contacts at the outer ends positioned for engagement with said contact blades, a shaft mounted for rotary motion in said switch block, said curved contacts being spaced apart a distance less than the thickness of said contact blades whereby the inherent bias of said double bladed fingers will provide a positive electrical contact with said contact blades, a shaft mounted for rotary motion in said switch block, said rotor being mounted on said shaft, and an operating handle assembly mounted on one end of said shaft for rotating said rotor between first and second positions wherein said contact blades are connected in a series relation in one position and a parallel relation in the other position, said assembly including an index member mounted on said switch block, said index member including means for positively locating the position of said rotor in one of the positions in said switch block.