Patent US3308760A successfully refreshed from Google Patents.
US3308760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passive magnetic proximity fuse
Assignee: Bolkow GmbH
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Filing: 1962-11-29
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Granted: 1967-03-14
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Expires: 1982-11-29
Abstract
No abstract record available.
Inventors
- 👤 Peters Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:51
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A METHOD FOR IGNITING AN EXPLOSIVE CHARGE HAVING A RELATIVE SPEED WITH RESPECT TO A TARGET, WHICH TARGET CAUSES A CHANGE OF THE EARTH''S MAGNETIC FIELD, WHICH CHANGE INDUCES VOLTAGES IN AN IGNITION DEVICE AND WHICH VOLTAGES ARE ADDED TO PRODUCE AN IGNITION VOLTAGE: THE IMPROVEMENT COMPRISING SIMULTANEOUSLY DERIVING, IN A MANNER KNOWN PER SE, THE INDUCED VOLTAGES CORRESPONDING TO SUCH CHANGES IN THE EARTH''S MAGNETIC FIELD IN THREE COORDINATES IN QUADRATURE WITH EACH OTHER, INDIVIDUALLY AMPLIFYING EACH INDUCED VOLTAGE, MULTIPLYING EACH AMPLIFIED INDUCED VOLAGE BY ITS OWN RESPECTIVE TIME INTEGRAL, ADDING THE THUS OBTAINED PRODUCTS OF AMPLIFIED VOLTAGES
Claim 2
Dependent Claim
100 words
IN A METHOD FOR IGNITING AN EXPLOSIVE CHARGE HAVING A RELATIVE SPEED WITH RESPECT TO A TARGET, WHICH TARGET CAUSES A CHANGE OF THE EARTH''S MAGNETIC FIELD, WHICH CHANGE INDUCES VOLTAGES IN AN IGNITION DEVICE AND WHICH VOLTAGES ARE ADDED TO PRODUCE AN IGNITION VOLTAGE: THE IMPROVEMENT COMPRISING SIMULTANEOUSLY DERIVING, IN A MANNER KNOWN PER SE, THE INDUCED VOLTAGES CORRESPONDING TO SUCH CHANGES IN THE EARTH''S MAGNETIC FIELD IN THREE COORDINATES IN QUADRATURE WITH EACH OTHER, INDIVIDUALLY AMPLIFYING EACH INDUCED VOLTAGE, MULTIPLYING EACH AMPLIFIED INDUCED VOLAGE BY ITS OWN RESPECTIVE TIME INTEGRAL, ADDING THE THUS OBTAINED PRODUCTS OF AMPLIFIED VOLTAGES
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |