US3646889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bomblet fuze system
Assignee: United States Department of the Navy
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Filing: 1970-07-09
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Granted: 1972-03-07
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Expires: 1990-07-09
Abstract
Abstract A bomblet fuze arming device for use inside a bomblet which is dispensed from a container by a remote means; the device utilizes gas or air pressure to compress an enclosed cavity of air which in turn unlocks a stab-detonator holder and during release from the bomb dispenser performs the arming function by use of a reaction turbine, which locks at the end of the arming function.
Inventors
- 👤 Edward J Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:37
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/18; F42C15/188; F42C15/20; F42C5/00; F42C5/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
227 words
A bomblet fuze safety and arming system comprising: a. a fragmentation casing, b. a primary explosive within said casing for fragmenting said casing upon detonation thereof, c. an arming and firing means within and surrounded by said primary explosive, and consisting of a housing having an explosive booster means in a waLl thereof adjacent said primary explosive, and a gas pressure operated locking and rotating means carrying a detonator means rotatably mounted within said housing, d. a passage extending from the inside of said housing to the exterior of said fragmentation casing through which a gas pressure is applied for actuating said arming and firing means, e. initially said locking and rotating means being locked in a safe position with said detonator means out-of-line with said explosive booster means, f. application of gas pressure via said passage being operable to unlock said locking and rotating means, g. release of said gas pressure which was applied for unlocking said locking and rotating means causing said locking and rotating means to rotate to the armed position with said detonator in line with and adjacent to said explosive booster, said locking and rotating means locking into armed position upon complete removal of said applied gas pressure, h. said detonator firing upon impact of said bomblet thus initiating said booster and in turn detonating said primary explosive when in armed position.
Claim 2
Dependent Claim
227 words
A bomblet fuze safety and arming system comprising: a. a fragmentation casing, b. a primary explosive within said casing for fragmenting said casing upon detonation thereof, c. an arming and firing means within and surrounded by said primary explosive, and consisting of a housing having an explosive booster means in a waLl thereof adjacent said primary explosive, and a gas pressure operated locking and rotating means carrying a detonator means rotatably mounted within said housing, d. a passage extending from the inside of said housing to the exterior of said fragmentation casing through which a gas pressure is applied for actuating said arming and firing means, e. initially said locking and rotating means being locked in a safe position with said detonator means out-of-line with said explosive booster means, f. application of gas pressure via said passage being operable to unlock said locking and rotating means, g. release of said gas pressure which was applied for unlocking said locking and rotating means causing said locking and rotating means to rotate to the armed position with said detonator in line with and adjacent to said explosive booster, said locking and rotating means locking into armed position upon complete removal of said applied gas pressure, h. said detonator firing upon impact of said bomblet thus initiating said booster and in turn detonating said primary explosive when in armed position.
Claim 3
Dependent Claim
128 words
A bomblet fuze as in claim 1 wherein said gas pressure operated locking and rotating means comprises: a. a compressible gas chamber having a check-valve nozzle thereon which allows gas to flow out only when the pressure inside the chamber is greater than pressure outside and does not allow gas to flow into the chamber, b. said gas chamber and thus the atmospheric gas therein being operable to be substantially compressed by application of suitable gas pressure via said passage, c. release of said applied gas pressure causing a differential of gas pressures within and without said chamber whereby gas will flow out through said check-valve nozzle faster than said compressed chamber can expand forming a reaction jet which rotates said locking and rotating to the armed position.
Claim 4
Dependent Claim
18 words
A bomblet fuze as in claim 2 wherein said compressible gas chamber is formed of compressible elastomer material.
Claim 5
Dependent Claim
20 words
A bomblet fuze as in claim 2 wherein said compressible gas chamber is in the form of a compressible bellows.
Claim 6
Dependent Claim
93 words
A bomblet fuze as in claim 2 wherein: a. said compressible chamber has a locking tab thereon which is operable to lockingly engage into either of two differently positioned cavities in the wall of said housing, one said cavity being at safe position and the other being at armed position, b. compression of said chamber releasing said tab from the armed position cavity and release of said applied gas pressure allowing said tab to lock into the armed position cavity after said locking and rotating means has been rotated to the armed position.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |