Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 254
od or hardrubber; the blades are of copper. The connections are solderedinto the sockets shown upon the ends of the screws whichproject beyond the back of the switch-board. Electric Pumps, 206 The upper row of figures as shown in Fig. 230 and enlargedin the engraving, 231, are circuit-breakers. The… … Fio. 230. In this case, the main contact is formed by means of alaminated brush while the final stroke is made on carbon, themotion of this breaker is by means of a toggle-joint which somultiplies the power applied that it does not require much ofan effort to close it; this device maintains the…
Hydraulic machinery · Pumping machinery
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
