Patent US3750581A successfully refreshed from Google Patents.
US3750581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Missile motor igniter assembly
Assignee: United States Department of the Army
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Filing: 1971-09-20
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Granted: 1973-08-07
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Expires: 1991-09-20
Abstract
Abstract An assembly for igniting a missile motor from a percussion primer carried in a cartridge case to an igniter charge located in the missle motor. A detonating cord, having one of its ends positioned in the cartridge case, is used to transfer ignition from the primer to the igniter charge. The end of the detonating cord adjacent the cartridge case is retained in position by a holder mounted in the cartridge case.
Inventors
- 👤 R Betts
- 👤 N Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:59
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/0823; F42C19/0826; F42C19/0819
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
An assembly for igniting a missile motor comprising: a cartridge case provided with a percussion primer; a PLEXIGLAS holder mounted in said case in spaced relationship to said percussion primer cartridge, and a detonating cord secured to said holder with one of its ends at a predetermined distance from said percussion primer to enhance ignition of said cord and its opposite end extending away from said holder and into the motor igniter charge.
Claim 2
Dependent Claim
73 words
An assembly for igniting a missile motor comprising: a cartridge case provided with a percussion primer; a PLEXIGLAS holder mounted in said case in spaced relationship to said percussion primer cartridge, and a detonating cord secured to said holder with one of its ends at a predetermined distance from said percussion primer to enhance ignition of said cord and its opposite end extending away from said holder and into the motor igniter charge.
Claim 3
Dependent Claim
141 words
An assembly for igniting a missile motor comprising: a cap provided with means for mounting said assembly in said missile motor; a cartridge case supported in said cap and provided with a percussion primer; said cap having a member for retaining the cartridge case in said cap, said member having an opening juxtaposition said percussion primer; a tube connected to said cap and provided with an igniter charge; said tube having a plurality of openings to enhance the burning rate of the igniter charge; a PLEXIGLAS holder mounted in said cartridge case in spaced relationship to said percussion primer, and a detonating cord secured to said holder with one of its ends at a predetermined distance from said percussion primer to enhance ignition of said cord and its opposite end extending away from said holder and into the motor igniter charge.
Claim 4
Dependent Claim
141 words
An assembly for igniting a missile motor comprising: a cap provided with means for mounting said assembly in said missile motor; a cartridge case supported in said cap and provided with a percussion primer; said cap having a member for retaining the cartridge case in said cap, said member having an opening juxtaposition said percussion primer; a tube connected to said cap and provided with an igniter charge; said tube having a plurality of openings to enhance the burning rate of the igniter charge; a PLEXIGLAS holder mounted in said cartridge case in spaced relationship to said percussion primer, and a detonating cord secured to said holder with one of its ends at a predetermined distance from said percussion primer to enhance ignition of said cord and its opposite end extending away from said holder and into the motor igniter charge.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |