High Torque (1902, 1903) Previous
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This model was the final version of the Thomson Induction Wattmeter, and it shares many similarities in design with the Form C-4 meter including the fixed brake magnets, reactance coil, and the starting coil. There was a second adjustment introduced on this meter - an anti-creep device which was a wire bonded to the disk near the hub that was bent towards or away from the shaft. GE High Torque
Electrical Meterman's Handbook