Robison's Manual of radio telegraphy and telephony for the use of naval electricians (1918)
Robison, S. S. (Samuel Shelburne), b. 1867, United States Naval Institute, Todd, David Wooster, Hooper, Stanford Caldwell · Annapolis, Md. : The United States Naval Institute · leaf 33
ressively increases from 180° to 270° and then decreasesuntil when the original conditions are restored by the completion of onerevolution the current has again fallen to zero. From the above and from an inspection of fig. 17a it will be seen thatcurrent is always flowing to the front in that half… … Fig. 18. 34. This can be shown graphically in fig. 18, where the rate of cut-ting and therefore the rate of change of number of lines included in thecircuit at different equidistant points in one revolution is represented byequidistant vertical lines proportional to the cutting rate, and…
