This generator was made by ARCo p/n: 1090600 to demonstrate how AC or DC electrical generation is controlled by the commutator.
The hand cranked generator uses a circular rubber belt to speed up the generator. The generator consists of a couple of iron pole pieces topped with a permanent magnet. There are two commutator systems. In Fig 1 you can see the two AC brushes that make contact over 360 degrees of generator shaft rotation. In Fig 2 you can see the split disk commutator that reverses the polarity every 180 degrees. Fig 3 shows the wiring that's under the bottom cover plate. The 3-way switch is AC-Off-DC and connects the appropriate commutator output to a lamp.
Fig 1 AC Brushes
Electro-Magnetic Toy Engine - sounds like a gas or steam engine
Build it YOURSELF!, a REAL ELECTRIC MOTOR - Kit to make a 2 pole D.C. motor & modern version made today & Science First demonstration motor -
Gilbert D.C. Motor
MESCO 1011 Toy Engine - works like a steam engine
Weeden D.C. Motor -a 2 pole D.C. motor
No. 6 Dry Cell - and Flash Amps as measured with Pocket Ammeters
Self Winding Clock Co. "Western Union" clocks - uses electromagnetic motor to wind spring page 1, page 2
Vibrators - A.C. Gilbert
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page created on 11 June 2014