A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 440
tic. This enables a much higher vacuumto be obtained than when the valves open andclose by the tension of the air. Mechanical pumps are unable to readily pro-duce the high vacua employed in most electriclamps. Mercury pumpsare employed for thispurpose. (See Pwnp,Air, Mercurial.) Pump, Air,… … Ffc 455 Barrel ofBianchis Air Putnp. (See Pump, Air,Pump, Air, SprengeVs Pump, Air, Sprengels Mercurial
Electricity · Electrical engineering
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