All, I have an old GE motor that I cannot either date or figure out exactly what type of AC motor it is. The label says it's a 110 volt, 60 Hz.,
1/4 Hp. , single phase machine. It runs well. Power to the motor is connected to a couple brushes that rub on rotor mounted slip rings. The slip rings are flat rather than cylindrical. The motor has a wound rotor with a centrifugal switch on board. This starting switch switches a winding on the rotor. The stator is made of laminated steel. The laminations are slotted. The slots are sorta keyhole shaped with the narrow part of the slot opening into the interior of the motor. The round part of each keyhole slot is filled with a metal rod that has been peened over like a rivet to keep it in place. The motor looks to me like a typical resistance start split phase single phase motor, but inside out. I wonder if the construction was used to avoid patent infringement. Anybody know anything about these motor types? Like what type it really is and maybe when it might have been made? Thanks, Eric