(under subclass 15) Subject matter in which the relative motion of the elements of the dynamoelectric device actuates an electrical switch which controls the flow of currents to windings associated with one of such elements.
SEE OR SEARCH CLASS
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,
87+, for periodic electromagnetic switches.
340, Communications: Electrical,
384.1+, especially subclasses 388.7 and 397.3 for interrupter in diaphragm and percussion type sound producer, respectively.