335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, subclass 191 for electromagnetic switches, with compound motion operating means.
(Electricity: Magnetically Operated Switches, Magnets, and Electromagnets; subclass; 191 for electromagnetic switches, with compound motion operating means)
Electricity: Magnetically Operated Switches, Magnets, and Electromagnets
subclass
191 for electromagnetic switches, with compound motion operating means