Patent US3200749A successfully refreshed from Google Patents.
US3200749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyroelectric effect in a subminiature high voltage impact fuse
Assignee: Individual
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Filing: 1960-10-11
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Granted: 1965-08-17
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Expires: 1980-10-11
Abstract
No abstract record available.
Inventors
- 👤 Rudolph N Downs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:45
CPC Classifications
F; F42; F42C; F42C11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SELF-CONTAINED, SELF-ARMING, IMPACT RESPONSIVE, MISSILE DETONATOR COMPRISING IN COMBINATION A THERMALLY ACTUATED PYROELECTRIC CRYSTAL CONNECTED THROUGH NON-REVERSING DIODE MEANS TO AN ELECTRIC STORAGE MEANS, SAID STORAGE MEANS CONNECTED THROUGH TRIODE SWITCHING MEANS TO THE CONTROL GRID OF A THYRATRON TUBE, SAID CONTROL GRID BEING MAINTAINED BY VOLTAGE DIVIDER MEANS AT A NEGATIVE VOLTAGE, AND SAID SWITCHING MEANS BEING CONTROLLED BY AN IMPACT RESPONSIVE CERAMIC TRIGGER MEANS WHEREBY HEATING OF SAID PYROELECTRIC CRYSTAL MEANS WILL ENERGIZE SAID ELECTRIC STORAGE MEANS AND A SUBSEQUENT IMPACT SHOCK WILL CAUSE SAID CERAMIC TRIGGER MEANS TO ACTUATE SAID SWITCHING MEANS RESULTING IN ELECTRICAL ENERGY FROM SAID STORAGE MEANS OVERCOMING THE NEGATIVE VOLTAGE APPLIED TO THE GRID OF SAID THYRATRON, CAUSING SAID THYRATRON TO CONDUCT.
Claim 2
Dependent Claim
120 words
A SELF-CONTAINED, SELF-ARMING, IMPACT RESPONSIVE, MISSILE DETONATOR COMPRISING IN COMBINATION A THERMALLY ACTUATED PYROELECTRIC CRYSTAL CONNECTED THROUGH NON-REVERSING DIODE MEANS TO AN ELECTRIC STORAGE MEANS, SAID STORAGE MEANS CONNECTED THROUGH TRIODE SWITCHING MEANS TO THE CONTROL GRID OF A THYRATRON TUBE, SAID CONTROL GRID BEING MAINTAINED BY VOLTAGE DIVIDER MEANS AT A NEGATIVE VOLTAGE, AND SAID SWITCHING MEANS BEING CONTROLLED BY AN IMPACT RESPONSIVE CERAMIC TRIGGER MEANS WHEREBY HEATING OF SAID PYROELECTRIC CRYSTAL MEANS WILL ENERGIZE SAID ELECTRIC STORAGE MEANS AND A SUBSEQUENT IMPACT SHOCK WILL CAUSE SAID CERAMIC TRIGGER MEANS TO ACTUATE SAID SWITCHING MEANS RESULTING IN ELECTRICAL ENERGY FROM SAID STORAGE MEANS OVERCOMING THE NEGATIVE VOLTAGE APPLIED TO THE GRID OF SAID THYRATRON, CAUSING SAID THYRATRON TO CONDUCT.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |