The story
From miners + safety + candlestick. Patented in 1872 by Theodore A. Washburn of Gold Hill, Nevada.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A hand-forged iron tool used as a portable candle holder, most notably by miners to light their way in shafts; the spike of the tool could be driven into a wooden support frame or crack; known colloquially as a Sticking Tommy or Tommy Stick. Full definition →
From miners + safety + candlestick. Patented in 1872 by Theodore A. Washburn of Gold Hill, Nevada.
Etymology from Wiktionary, CC BY-SA 4.0.