(under subclass 328) Subject matter wherein mechanical energy from an external source is applied to the piezoelectric element to produce an electric potential difference between at least two electrically accessible points on the surface of the element.
SEE OR SEARCH CLASS
84, Music, Digest 24 for piezoelectric signal generators stimulated by a musical instrument.
102, Ammunition and Explosive Devices,
18, 210 and Digest 5 for voltage generators which may include a piezoelectric element.
123, Internal-Combustion Engines,
148, for a piezoelectric spark generator.
200, Electricity: Circuit Makers and Breakers, 61.01, and Digest 20 for sound or vibration devices which produce a signal and may include a piezoelectric element.
315, Electric Lamp and Discharge Devices: Systems,
55, and 209 for piezoelectric element spark generators.
340, Communications: Electrical,
365, for pressure sensitive keyboards which generate an electric signal and may use a piezoelectric element.
361, Electricity: Electrical Systems and Devices,
247+, and particularly subclass 260 for piezoelectric ignites.
431, Combustion,
43, 128, 132, 254+, 258+, and Digests 58, 60 and 63 for electric ignites which may utilize a piezoelectric element.
