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Scientific American, Vol. 76, No. 1 (1897) (1897)
leaf 4
ong the first to adapt elec- contact with a pronounced snap. Troubles with the burning of switch contacts have in this apparatus been tricity to elevators, and they make direct elevators for entirely avoided. The automatic rheostat is shown at- both freight and passenger service, ranging in speed… … age of the lifting ropes, or in case of excessive speed due to ELECTRIC ELEVATOR FOR FIREPROOF BUILDINGS. © 1897 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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