US3824486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state switching circuit employing a selectively damped piezoelectric resonator to control a thyristor circuit
Assignee: Vernitron Corp
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Filing: 1972-10-27
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Granted: 1974-07-16
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Expires: 1992-10-27
Abstract
Abstract A compact and relatively economical high speed solid state switching circuit wherein a thyristor is controlled by an oscillator employing a selectively damped piezoelectric resonator, the piezoelectric resonator being housed within a mount that yields manual control over its damping.
Inventors
- 👤 E Maciag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:49
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/96; H03K17/964; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A switching circuit for controlling the delivery of power to a load via switching means rendered conductive in response to alternating current supplied by an oscillator with a piezoelectric resonator element having a relatively thin configuration with substantially parallel faces, including means for changing the characteristics of said piezoelectric element comprising: ridigly positioned damping means located adjacent to one face of said element, spring means interconnecting said one face to said rigidly positioned damping means, movable damping means located adjacent to the other face of said element, spring means interconnecting said other face to said movable damping means, and control means for selectively changing the positions of said damping means to either physically press against the proximate faces of said piezoelectric element or freely suspend said element therebetween via said spring means.
Claim 2
Dependent Claim
132 words
A switching circuit for controlling the delivery of power to a load via switching means rendered conductive in response to alternating current supplied by an oscillator with a piezoelectric resonator element having a relatively thin configuration with substantially parallel faces, including means for changing the characteristics of said piezoelectric element comprising: ridigly positioned damping means located adjacent to one face of said element, spring means interconnecting said one face to said rigidly positioned damping means, movable damping means located adjacent to the other face of said element, spring means interconnecting said other face to said movable damping means, and control means for selectively changing the positions of said damping means to either physically press against the proximate faces of said piezoelectric element or freely suspend said element therebetween via said spring means.
Claim 3
Dependent Claim
50 words
A switching circuit as defined in claim 1, wherein said control means comprises biasing means for biasing said movable damping means to assume a static position relative to said rigidly positioned damping means, and actuating means for overcoming said biasing means to change the relative positions of said damping means.
Claim 4
Dependent Claim
26 words
A switching circuit as defined in claim 1, including electric contacts, wherein said spring means electrically connect energy from said piezoelectric element to said electric contacts.
Claim 5
Dependent Claim
27 words
A switching circuit as defined in claim 2, wherein said biasing means establishes a static position of said damping means in physical contact with said piezoelectric element.
Claim 6
Dependent Claim
30 words
A switching circuit as defined in claim 2, wherein said biasing means establishes a static position of said damping means which freely suspends said piezoelectric element between said damping means.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |