21 ELECTRIC MOTOR CONTROLLERS FOR CONTROLLING THE STARTING, STOPPING, AND REVERSING OF ELECTRIC MOTORS, AND PARTS THEREOF, ELECTRIC MOTORS AND ARMATURES AND PARTS THEREOF, [ ELECTRIC TROLLEYS AND PARTS THEREOF, ELECTRIC TROLLEY HARPS, ELECTRIC TROLLEY WHEELS, ] ELECTRIC REELS FOR REELING UP AND REELING OUT ELECTRICAL CABLES FOR CONDUCTING CURRENT TO PORTABLE VEHICLES AND THE LIKE [ , AND ELECTRIC COILS ]