Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 178
gnaling and other purposes. How-ever, this form of magnet was never used on machines of anyeonsiderabk size, ehielly because the magnets would haveto be very large; the strength of the magnets decreases whenin use, owing to the vibration of the machine and the effectsof the magnetic field set up by…
Electric machinery
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
