c- 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 tached to the wall back of… … ^T!iJ«:>iJS««rS» age of the lifting ropes, or in TB£ BBASE SWITCH AND AUTOMATIC STOPS ON THE MACHINE. case of excessive speed due to ELECTBIG ELEVATOB FOB FIBEFBOOF SUILSINes. 11897 SCIENTIFIC AMERICAN, INC.
Patents · Munn · Scientific American · Apparatus · Ice cream · Gas engine · Horse power · Operating sheave · Water tube · Mother lode · Seventh avenue · Pig iron · Declination south
Internet Archive · Public domain (published before 1931). Free to use for anything.
