Patent JPS5872634A successfully refreshed from Google Patents.
US3739726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic fuze
Assignee: Intron International Inc
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Filing: 1970-08-17
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Granted: 1973-06-19
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Expires: 1990-08-17
Abstract
Abstract A fuze for ordnance projectiles to be launched from a vehicle is armed, after separation from its launcher, by mechanical closure of switches with the aid of a delayed-action squib detonating by an electric charge stored on a capacitor. The fuze system includes means for charging the above capacitor at the time of launch, thus insuring the inert state of the fuze under conditions of storage, transportation and loading into the launch vehicle.
Inventors
- 👤 R Pintell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:27
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A firing system for an explosive charge aboard a projectile to be launched from a carrier, comprising: a detonator for said charge aboard said projectile; an activating circuit for said detonator on said projectile, said circuit including capacitive storage means as its sole supply of activating energy; a source of charging current for said storage means on said carrier; transfer means operative only upon incipient separation of said projectile from said carrier for instantly charging said storage means with current from said source; and sensing means independent of said transfer means on said projectile for completing a firing circuit to said detonator from said storage means, subsequently to the charging thereof, in response to external parameters.
Claim 2
Dependent Claim
116 words
A firing system for an explosive charge aboard a projectile to be launched from a carrier, comprising: a detonator for said charge aboard said projectile; an activating circuit for said detonator on said projectile, said circuit including capacitive storage means as its sole supply of activating energy; a source of charging current for said storage means on said carrier; transfer means operative only upon incipient separation of said projectile from said carrier for instantly charging said storage means with current from said source; and sensing means independent of said transfer means on said projectile for completing a firing circuit to said detonator from said storage means, subsequently to the charging thereof, in response to external parameters.
Claim 3
Dependent Claim
26 words
A system as defined in claim 1 wherein said transfer means includes high-frequency radio transmission means on said carrier and corresponding receiving means on said projectile.
Claim 4
Dependent Claim
40 words
A system as defined in claim 1 wherein said transfer means includes a conductor extending slack from said carrier to said projectile and normally open switch means in series with said conductor momentarily closable upon a tensioning of the latter.
Claim 5
Dependent Claim
22 words
A system as defined in claim 3 wherein said switch means comprises a pair of switches at opposite ends of said conductor.
Claim 6
Dependent Claim
43 words
A system as defined in claim 1 wherein said activating circuit includes a normally open mechanical circuit breaker between said storage means and said detonator, and pyrotechnic switch means triggerable by said storage means upon a charging thereof for closing said circuit breaker.
Claim 7
Dependent Claim
33 words
A system as defined in claim 5 wherein said activating circuit further includes delay means inserted between said storage means and said pyrotechnic switch means for retarding the closure of said circuit breaker.
Claim 8
Dependent Claim
35 words
A system as defined in claim 1 wherein said activating circuit includes a firing condenser of a capacitance substantially less than that of said storage means, said condenser having a discharge path through said detonator.
Claim 9
Dependent Claim
41 words
A system as defined in claim 7 wherein said firing condenser is provided with protective circuitry including an initially open safety switch closable upon separation of said projectile from said carrier for blocking premature discharge of said condenser through said detonator.
Claim 10
Dependent Claim
20 words
A system as defined in claim 8 wherein said protective circuitry includes a clamping network in shunt with said condenser.
Claim 11
Dependent Claim
29 words
A system as defined in claim 8 wherein said safety switch is provided with a rupturable lanyard tied to said carrier for closing said safety switch upon incipient separation.
References Cited (Backward Citations)
US2735993A
Cited
US3560863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |