US3587469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugally armed ordnance fuze
Assignee: JAMES N AYRES
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Filing: 1968-08-21
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Granted: 1971-06-28
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Expires: 1988-08-21
Abstract
Abstract A CENTRIFUGALLY ARMED FUZE HAVING A SPRING-BIASED, SPIN-ACTUATED STAB DETONATOR AND A PLASTICIZED EXPLOSIVE BOOSTER LEAD-IN. ONCE ARMED AT A FIRST PREDETERMINED ROTATIONAL VELOCITY, AN INTERDEPENDENT COMPOUND LEVER SYSTEM, HAVING TWO CENTRIFUGALY RESPONSIVE SEARS, RESTRAINS A SPRING-BIASED FIRING PIN UNTIL THE SPIN RATE DECAYS TO A SECOND (LOWER) PREDETERMINED ROTATIONAL VELOCITY. THE SEARS BEAR AGAINST ONE ANOTHER AND ONE RESTS WITHIN A SLOT FORMED IN THE OTHER TO OBTAIN MECHANICAL ADVANTAGE BY LEVERAGE.
Inventors
- 👤 Peter D Gratton
- 👤 James N Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:27
CPC Classifications
F; F42; F42C; F42C7/00; F42C15/00; F42C15/18; F42C15/184; F42C15/20; F42C15/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |