ELECTROMECHANICAL TRANSDUCERS INCORPORATING A PIEZOELECTRIC COMPONENT FOR USE AS SENSORS, ACTUATORS AND POSITIONERS; PIEZOELECTRIC DEVICES FOR EFFECTING MECHANICAL AND ELECTRICAL CONTROL, SENSING AND OPERATION, OF VALUES, SOLENOIDS, RELAYS, SWITCHES, MOTORS, GENERATORS, CHARGERS, TRANSFORMERS, PUMPS, COMPRESSORS, GYROSCOPES, SENSORS FOR DISPLACEMENT, VELOCITY AND ACCELERATION, AND OPTICAL APPARATUS; SUCH PIEZOELECTRIC DEVICES FOR USE WITH CAR MIRRORS, HEAD-LAMP DIPPING SYSTEMS, CAR DOOR LOCKS, ANTI-LOCKS BRAKING SYSTEMS, MICROSCOPES, MICROSURGERY, MICRO-FABRICATION, SEMICONDUCTOR MANUFACTURE, CAMERA FOCUSING, LASER AND LIGHT DIRECTING, PROXIMITY SENSORS, PROSTHETIC LIMBS, PIPELINE PIGS, AIRCRAFT WING DISTORTERS, AND HOUSE DOOR LOCKS AND CLOSERS; PIEZOELECTRIC DEVICES FOR PRODUCING OR MAKING USE OF OSCILLATORY, RECIPROCATORY AND/OR LINEAR MOVEMENT; SUCH PIEZOELECTRIC DEVICES FOR USE WITH ELECTRIC TOOTHBRUSHES, MOBILE PHONE VIBRATORS, SCREEN SHAKERS, FOOD PROCESSORS, SHAVERS, HAIR TRIMMERS, FLOATING BEARINGS, AIRCRAFT WING DE-ICERS, MASSAGERS, SIRENS, SEWING MACHINES, COOLING DEVICES, PEN PLOTTERS, DISK DRIVE HEAD POSITIONERS, MICRO-POSITIONING, MECHANICAL DISPLAYS, ADAPTIVE OPTICS, ACTUATED OPTICS, CAMERA-TRACKING MECHANISMS, COMPUTER PRINTERS AND SCANNERS, EARPHONES, HEADPHONES, LOUDSPEAKERS, MICROPHONES, AUDIO PICK-UPS, SEISMOGRAPHS, MOVING-COIL METER REPLACEMENTS, DEVICES FOR PRODUCING VIBRATION-CANCELING MOVEMENTS OF SUPPORT TABLES, LOUDSPEAKER CONES AND DIAPHRAGMS, VEHICLE SUSPENSIONS, POWER GENERATION FROM WIND, WAVE AND MECHANICAL SPRING ENERGY, IGNITERS, CATTLE PRODS, PERSONAL SECURITY DEVICES, TRANSFORMERS AND ELECTRICAL ISOLATORS; PIEZOELECTRIC DEVICES FOR EFFECTING FLOW CONTROL OF FLUIDS AND FLUIDIZED MATERIALS; SUCH PIEZOELECTRIC DEVICES FOR USE WITH GAS VALVES, FUEL/AIR MIXTURE CONTROLLERS, WATER FLOW VALVES, DOSAGE CONTROL MECHANISMS, SOWING MACHINES, PILL DISPENSERS, AND BOTH INDUSTRIAL AND DOMESTIC CONTROLLERS FOR GASES, LIQUIDS AND POWDERS