and pulls down receiver is furnished for each. Thus an operator may be the back of the switchboard proper. The board the cam lever switch, thus bringing her telephone into subject to fifty callers or less. But she must be pre- stands about eight feet in height upon a slightly ele- shunt circuit… … presumption to set a limit tion coils as unnecessary to Fig. 5.-ST0RAGE BATTERY PLANT, SWITCHES, AMPERE METERS AND SWITCHES to invention, but the mul- the comprehension of the board, the other end of the tiple switchboard seems to line may be regarded as grounded at the subscri- have nearly reached…
Patents · Spring · Contained · Munn · Scientific American · Adapted · Spring jack · Horse power · Electric light · Electric motor · Cast Iron · Steel shaft · Northern pacific · American supplement · Express money
Internet Archive · Public domain (published before 1931). Free to use for anything.
