Patent US3712232A successfully refreshed from Google Patents.
US3712232A
Expired / Lapsed
US
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Variable delay fuse for aircraft parachute flare
Assignee: United States Department of the Navy
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Filing: 1968-10-23
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Granted: 1973-01-23
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Expires: 1988-10-23
Abstract
Abstract A fuse and ejection device for an aircraft parachute flare having an expellant charge for separating a parachute and flare from an outer container, a stationarily mounted delay fuse for igniting the expellant charge, and a rotatable triggering device for selectively igniting different lengths of the delay fuse whereby the time of free fall of the parachute and flare within the outer container can be varied. A safety locking ring is provided to prevent accidental triggering of the expellant charge and the safety locking ring is first removed by the pull of a lanyard secured to a launching aircraft and then the lanyard pulls a disconnect pin which actuates the triggering device.
Inventors
- 👤 J Lueking
- 👤 C Abel
- 👤 J Clifton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:51
CPC Classifications
F; F42; F42B; F42B4/00; F42B4/06; F42B4/10; F42B4/12; F42B10/00; F42B10/32; F42B10/48; F42B10/56
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
179 words
A variable delay fuse and ejection device for ejecting a flare and parachute from an outer container having plurality of attaching pins thereon comprising, a fuse case having a plurality of grooves which are engageable one each with the plurality of attaching pins on said outer container and said fuze case having a plurality of indentations on one surface thereof, a rotor rotatably mounted to said fuse case and provided with a spring-biased detent which is selectively engageable with said indentations, a charge of powder in said fuse case, a time delay fuse positioned in an arc within said case for igniting said charge of powder, trigger mechanism attached to said rotor and adaptable for igniting said time delay fuse at selected positions, said trigger mechanism including a firing pin, spring means for driving said firing pin, a pull pin engageable with said rotor and said firing pin for holding said firing pin in a cocked position and ignition means for igniting said time delay fuze upon triggering of said firing pin, and means for locking said trigger mechanism.
Claim 2
Dependent Claim
179 words
A variable delay fuse and ejection device for ejecting a flare and parachute from an outer container having plurality of attaching pins thereon comprising, a fuse case having a plurality of grooves which are engageable one each with the plurality of attaching pins on said outer container and said fuze case having a plurality of indentations on one surface thereof, a rotor rotatably mounted to said fuse case and provided with a spring-biased detent which is selectively engageable with said indentations, a charge of powder in said fuse case, a time delay fuse positioned in an arc within said case for igniting said charge of powder, trigger mechanism attached to said rotor and adaptable for igniting said time delay fuse at selected positions, said trigger mechanism including a firing pin, spring means for driving said firing pin, a pull pin engageable with said rotor and said firing pin for holding said firing pin in a cocked position and ignition means for igniting said time delay fuze upon triggering of said firing pin, and means for locking said trigger mechanism.
Claim 3
Dependent Claim
36 words
A variable delay fuse and ejection device as set forth in claim 1 wherein said means for locking said trigger mechanism includes a locking ring engageable with said rotor for preventing removal of said pull pin.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |