Warren S. Johnson of Whitewater, Wisconsin was an inventor who patented an electric tele-thermoscope in 1883. His patent describes a device that shows, at a convenient point, the temperature of rooms, conservatories and cellars located elsewhere. A thermostatic transmitter in the room holds a coiled spring made of strips of metals that expand by different amounts, and wires carry its movement to indicators. He assigned half of the patent to William Plankinton of Milwaukee.
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Warren S. Johnson
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Source Thermostat (Wikipedia)
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Source US Patent 281884, Electric tele-thermoscope (Warren S. Johnson)
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Source Thermostat (Wikipedia)History sectionQuote, History section
Johnson (1847–1911), of Wisconsin, patented a bi-metal room thermostat in 1883, and two years later sought a patent for the first multi-zone thermostatic control system.
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1. Thermostat (Wikipedia)
History sectionQuote, History section
Johnson (1847-1911), of Wisconsin, patented a bi-metal room thermostat in 1883, and two years later sought a patent for the first multi-zone thermostatic control system.
US Patent 281884, Electric tele-thermoscope (Warren S. Johnson)
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have invented certain new and useful Improvements in Electric Tele-Thermoscopes
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