(under subclass 15) Subject matter in which the movable parts of the dynamoelectric device reciprocate or vibrate at a frequency which is determined by the natural period of the mounting means for the movable parts.
(1) Note. This subclass relates, for example, to reciprocating motors having a tuned reed type of armature. Generally, but not invariably, a state of resonance exists between the natural period of the movable armature and the
impulses of an electric field.
SEE OR SEARCH THIS CLASS, SUBCLASS:
26, for similar subject matter utilizing magnetostrictive means.
SEE OR SEARCH CLASS
331, Oscillators, 156, for electrical oscillators utilizing an electromechanical resonator of the vibrating reed or string type (e.g., tuning fork).
