Electrical generator or motor structure – Educational or construction units or kits
Patent
1976-03-26
1977-07-19
Budd, Mark O.
Electrical generator or motor structure
Educational or construction units or kits
310 25, 84409, H01L 4104
Patent
active
040371212
ABSTRACT:
An electrically driven tuning fork of the piezoelectric type, electromagnetic type or the like for use in electrical and electronic equipment which includes a tuning fork vibrator and electrical elements for driving the tuning fork vibrator. The two-pronged tuning fork vibrator has a pair of rectangular projections integrally formed with the prongs on corresponding side edges of the said prongs at one side of the tuning fork, excepting opposite end portions of the prongs adjacent to the node and in same embodiments, both the mode and antinode of the fundamental harmonic oscillation of the tuning fork for suppressing undesirable oscillation other than the fundamental harmonic oscillation of the tuning fork. Electrical elements are affixed onto the outer or inner surfaces of the prongs.
REFERENCES:
patent: 309138 (1884-12-01), Fischer
patent: 1637442 (1927-08-01), Dorsey
patent: 2581963 (1952-01-01), Langloys
patent: 3308361 (1967-03-01), Nakai et al.
patent: 3480809 (1969-11-01), Grib
patent: 3593516 (1971-07-01), Mayer
patent: 3597642 (1971-08-01), Kurino
patent: 3759133 (1973-09-01), Budych et al.
patent: 3760482 (1973-09-01), Kawamura
Nakamura Takeshi
Nishiyama Hiroshi
Budd Mark O.
Murata Manufacturing Co. Ltd.
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