Heater, Dowsing Bulb

This heater consists of a large copper frame with a nave like inset containing two electric sockets, and two copper spring like clips. The socket is held, and the clips supported by two long dowsing bulbs,
however, there is one bulb missing. The one off switch is located at the front of the frame, and the electric cord enters the heater at the back of the frame. Approx date 1904-15.

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The creation of the first practical heater is attributed to H.J. Dowsing of England, who in 1896 repurposed the electric filament lamp for heating because it was energy inefficient, producing more heat than light. He did this by adding frosted glass to the carbon filament bulbs and combining them with a reflector backing to better radiate heat.
This Dowsing-style heater is dated 1904-1915 and has no makers mark. Maybe this means that this is as an example of home-made ingenuity!
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