Patent US3621782A successfully refreshed from Google Patents.
US3621782A
Expired / Lapsed
US
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Centrifugally operated safety and arming device
Assignee: United States Department of the Army
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Filing: 1969-10-17
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Granted: 1971-11-23
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Expires: 1989-10-17
Abstract
Abstract A SAFETY AND ARMING DEVICE FOR USE IN SPIN-OPERATED MUNICITION FUZES. A CONTAINER PLACED ALONG THE SPIN AXIS OF THE EXPLOSIVE TRAIN IS FILLED WITH A FLUID IN WHICH ARE RAMDOMLY SPACED EXPLOSIVE GRANULES OF A DENSITY LESS THAN THAT OF THE FLUID. THE MIXTURE, IN ADDITION TO PROVIDING A DETONATION WAVE BARRIER, MAINTAINS THE EXPLOSIVE TRAIN OUT OF LINE PRIOR TO LAUNCH. AFTER LAUNCHING, THE CENTRIFUGAL FORCE DUE TO SPIN ACTS TO ALIGN THE LESS DENSE EXPLOSIVE GRANULES ALONG THE AXIS OF ROTATION OF THE DEVICE, THUS COMPLETING THE EXPLOSIVE TRAIN AND ARMING THE FUZE.
Inventors
- 👤 Allan M Biggar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:16
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/28; F42C15/285
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |