US3700936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage generating apparatus
Assignee: Denki Onkyo Co Ltd
•
Filing: 1970-09-25
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Granted: 1972-10-24
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Expires: 1990-09-25
Abstract
Abstract In a high voltage generating apparatus utilizing a piezoelectric transformer element driven by an AC voltage, the resonance frequency of the piezoelectric transducer element is varied by connecting a variable capacitor of small capacity between the output electrode of the piezoelectric transformer element and the ground.
Inventors
- 👤 Massao Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:15
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
A high voltage generating apparatus comprising a piezoelectric transformer element including a substrate of piezoelectric substance, a pair of driving electrodes applied on the opposite surfaces of one end of said substrate, an output electrode applied to the opposite end surface of said substrate, a driving source for applying an AC driving voltage across said driving electrodes, and a capacitor connected between said output electrode and ground, said capacitor having a capacitance in the range of from approximately 0.1 to approximately 3 picofarads.
Claim 2
Dependent Claim
83 words
A high voltage generating apparatus comprising a piezoelectric transformer element including a substrate of piezoelectric substance, a pair of driving electrodes applied on the opposite surfaces of one end of said substrate, an output electrode applied to the opposite end surface of said substrate, a driving source for applying an AC driving voltage across said driving electrodes, and a capacitor connected between said output electrode and ground, said capacitor having a capacitance in the range of from approximately 0.1 to approximately 3 picofarads.
Claim 3
Dependent Claim
23 words
The high voltage generating apparatus as recited in claim 1 wherein said capacitor is a variable capacitor adapted to vary within said range.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |