Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 239
light return stroke toprevent excessive wear and tear of the machine. By-winding- the solenoid coils in three or more sections, ofequal resistances, longitudinally disposed, and connectingthe two or more forward sections in parallel with the supplywires and the back section singly—the current…
Science · Technology · Meteorology · Patents
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
