335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, subclasses 74+ for motor operated electromagnetic switches with a brake or clutch in the contact operating means.
(Electricity: Magnetically Operated Switches, Magnets, and Electromagnets; subclasses; 74+ for motor operated electromagnetic switches with a brake or clutch in the contact operating means)
Electricity: Magnetically Operated Switches, Magnets, and Electromagnets
subclasses
74+ for motor operated electromagnetic switches with a brake or clutch in the contact operating means