METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC OR ULTRASONIC FREQUENCY FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. Fulltext... Hierarchy... Expanded...B07B 1/40, Fulltext... Hierarchy... Expanded...B23Q 17/12, Fulltext... Hierarchy... Expanded...B24B 31/06; measurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves Fulltext... Hierarchy... Expanded...G01H; in direction finding, locating, distance or velocity measuring Fulltext... Hierarchy... Expanded...G01S; control of mechanical vibrations in general Fulltext... Hierarchy... Expanded...G05D; sound-producing devices, e.g. bells sirens, whistles, Fulltext... Hierarchy... Expanded...G10K; generation of electrical oscillations Fulltext... Hierarchy... Expanded...H03B; electromechanical resonators in general Fulltext... Hierarchy... Expanded...H03H; electromechanical transducers Fulltext... Hierarchy... Expanded...H04R) [2] |