Rheostat
circa 1892
Rheostats vary the amount of electrical resistance in a circuit. They proved beneficial as the use of electrical power expanded in the late 1800s. Among their many applications, rheostats helped motors start safely, controlled motor speed, maintained a constant current in battery chargers, and adjusted volume and light levels.
2016.0.1.78
From the Collections of The Henry Ford.
Not on exhibit to the public.
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