GE Electric Lamp Heater
model A-23 electric
heater was introduced in 1913 by General Electric. It was never
used, and found in its original carton though, unfortunately, it
suffered some water damage sometime while it was in storage. What
is left of the top of the carton is shown below.
The source of the heat is two large carbon-filament bulbs, about 11 inches long and 3 inches in diameter. Each bulb draws 250 watts. Behind the bulbs is a copper-plated steel reflector to direct the heat towards the front. The picture above shows the lamps lit at about one half their normal voltage.