A Large Geissler Tube Rotating Electric Motor
Continental(?), C.1900, unsigned, turned wooden base with terminals for low voltage to motor and high voltage to Geissler tube, brass column supports soft iron ring, bobbin wound coils to the rotor, breaker to the rear, height 44cm
Reference: For a similar instrument see: http://physics.kenyon.edu/EarlyApparatus/Electric_Motors/Wheatstones_motor/Wheatstones_Motor.html
Sold for £1,020
Result plus buyers premium
Continental(?), C.1900, unsigned, turned wooden base with terminals for low voltage to motor and high voltage to Geissler tube, brass column supports soft iron ring, bobbin wound coils to the rotor, breaker to the rear, height 44cm
Reference: For a similar instrument see: http://physics.kenyon.edu/EarlyApparatus/Electric_Motors/Wheatstones_motor/Wheatstones_Motor.html