Patent US3683210A successfully refreshed from Google Patents.
US3683210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage generating apparatus utilizing piezoelectric transformers
Assignee: Denki Onkyo Co Ltd
•
Filing: 1970-04-13
•
Granted: 1972-08-08
•
Expires: 1990-04-13
Abstract
Abstract In a high voltage generating apparatus utilizing a piezoelectric transformer having two driving electrodes and an output electrode, a signal of a definite frequency is applied across the driving electrodes via an inductance element, a capacitor is connected in parallel with the driving electrodes to form a resonance circuit together with the inductance element and the resonance frequency of the resonance circuit is made substantially equal to the natural resonance frequency of the piezoelectric transformer which is equal to an odd higher harmonic of the signal frequency.
Inventors
- 👤 Takehiko Kawada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:32
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
High voltage generating apparatus comprising a piezoelectric transformer including two driving electrodes and an output electrode, an inductance element with one end connected to one of the driving electrodes, a source of impulse signal connected across the other end of said inductance element and the other of said driving electrodes to supply said impulse signal of a given frequency, and a capacitor connected across said driving electrodes, said inductance element and said capacitor constituting a resonance circuit having a resonance frequency substantially equal to the natural resonance frequency of said piezoelectric element and equal to an odd higher harmonic of the frequency of said signal source, said odd higher harmonic combining to reduce the peak voltage of said impulse signal.
Claim 2
Dependent Claim
120 words
High voltage generating apparatus comprising a piezoelectric transformer including two driving electrodes and an output electrode, an inductance element with one end connected to one of the driving electrodes, a source of impulse signal connected across the other end of said inductance element and the other of said driving electrodes to supply said impulse signal of a given frequency, and a capacitor connected across said driving electrodes, said inductance element and said capacitor constituting a resonance circuit having a resonance frequency substantially equal to the natural resonance frequency of said piezoelectric element and equal to an odd higher harmonic of the frequency of said signal source, said odd higher harmonic combining to reduce the peak voltage of said impulse signal.
Claim 3
Dependent Claim
51 words
The high voltage generating apparatus according to claim 1 in which said source includes a switching element comprising the horizontal deflection circuit of a television receiver wherein said other end of said inductance element and said other driving electrode of said piezoelectric transformer are connected across electrodes of said switching element.
Claim 4
Dependent Claim
47 words
The high voltage generating apparatus according to claim 1 and including means connected to said one end of said inductance element which is connected to said one driving electrode for deriving a voltage lower than the voltage taken out from said output electrode of said piezoelectric transformer.
References Cited (Backward Citations)
US2410389A
Cited
US2455824A
Cited
US3026488A
Cited
US2975354A
Cited
US3256498A
Cited
US3562792A
Cited
US3487239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |