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Patent US3707916A successfully refreshed from Google Patents.
US3707916A
Expired / Lapsed
US
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Igniter assembly
Assignee: United States Department of the Navy
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Filing: 1970-07-30
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Granted: 1973-01-02
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Expires: 1990-07-30
Abstract
Abstract An igniter assembly for a rocket motor is positioned within a hollow boss of a heat barrier composed of phenolic asbestos and provided with two gussets for proper orientation and which prevent rotation of four equally spaced igniter ports with the rocket motor propellant grain perforation The igniter assembly comprises a pair of electrical squibs located within sockets in the hollow boss, a booster charger assembly containing booster powder compressed against the electrical squibs, a cross-shaped igniter propellant grain having one end inserted in the booster charge assembly, an igniter cushion to absorb shock, and a closure plug to receive the other end of the propellant grain and to retain the igniter assembly within the hollow boss of the heat barrier.
Inventors
- 👤 J Yeakey
- 👤 D Carpenter
- 👤 D Meraz
- 👤 A Simhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:50
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/95
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
An igniter assembly for a rocket motor positioned within a hollow boss of a heat barrier capable of igniting high density propellant, which comprises: a pair of electrical squibs located within sockets in said hollow boss; a booster charge assembly containing booster powder compressed against said squibs; igniter propellant grain having one end inserted in Said booster charge assembly; a closure plug to receive the other end of said propellant grain and to retain the igniter assembly within the hollow boss of the heat barrier; and a plurality of ignitor ports in said hollow boss communicating said propellant grain with said high density propellant to allow said propellant grain to ignite said high density propellant.
Claim 2
Dependent Claim
115 words
An igniter assembly for a rocket motor positioned within a hollow boss of a heat barrier capable of igniting high density propellant, which comprises: a pair of electrical squibs located within sockets in said hollow boss; a booster charge assembly containing booster powder compressed against said squibs; igniter propellant grain having one end inserted in Said booster charge assembly; a closure plug to receive the other end of said propellant grain and to retain the igniter assembly within the hollow boss of the heat barrier; and a plurality of ignitor ports in said hollow boss communicating said propellant grain with said high density propellant to allow said propellant grain to ignite said high density propellant.
Claim 3
Dependent Claim
27 words
An igniter assembly as recited in claim 1 wherein said closure plug has an igniter cushion located therein to compensate for dimensional tolerances and absorb vibrational shocks.
Claim 4
Dependent Claim
24 words
The device of claim 1 wherein said igniter propellant grain has a cross-shaped cross section with one end thereof adjacent to said booster powder.
Claim 5
Dependent Claim
27 words
The device of claim 1 including means to prevent the hollow boss from rotating relative to the high density propellant, to prevent clogging of the ignitor ports.
Claim 6
Dependent Claim
17 words
The device of claim 4 wherein said hollow boss is positioned axially inside said high density propellant.
Claim 7
Dependent Claim
14 words
The device of claim 5 wherein said heat barrier is formed of phenolic asbestos.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |