Patent US3776140A successfully refreshed from Google Patents.
US3776140A
Expired / Lapsed
US
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Shot vortex arming device
Assignee: United States Department of the Army
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Filing: 1971-11-22
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Granted: 1973-12-04
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Expires: 1991-11-22
Abstract
Abstract A safety-arming mechanism which senses spin and acceleration. The mechanism has a particulate material as a barrier between initiator and acceptor explosive charges. The particulate material is freed by acceleration causing set back of a piston, whose travel is retarded by pressure build up on one side of the piston. Spin forces the particulated material outwardly creating a cavity or vortex through the center and allowing transmission of an explosive reaction.
Inventors
- 👤 J Jones
- 👤 M Osburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:19
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/28; F42C15/285; F42C15/24; F42C15/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
A safety-arming mechanism for a guided missile which senses spin acceleration comprising: an igniter; an explosive charge; said igniter and said charge being axially aligned; means for igniting said igniter; a cylindrical housing defining a chamber between said igniter and said explosive charge; a barrier of particulate material located in said housing; a movable piston slidable within said housing and contiguous said barrier material; a spring biasing said piston in the direction of missile acceleration for urging said material in a closely packed arrangement; whereby upon launching of the missile the spin and setback forces acting upon the particulate material create a cavity through the center of said housing for the transmission of an explosive reaction.
Claim 2
Dependent Claim
116 words
A safety-arming mechanism for a guided missile which senses spin acceleration comprising: an igniter; an explosive charge; said igniter and said charge being axially aligned; means for igniting said igniter; a cylindrical housing defining a chamber between said igniter and said explosive charge; a barrier of particulate material located in said housing; a movable piston slidable within said housing and contiguous said barrier material; a spring biasing said piston in the direction of missile acceleration for urging said material in a closely packed arrangement; whereby upon launching of the missile the spin and setback forces acting upon the particulate material create a cavity through the center of said housing for the transmission of an explosive reaction.
Claim 3
Dependent Claim
46 words
The device of claim 1 wherein said igniter igniting means comprises: first and second switch contacts; said first contact being attached to the missile body; and said second contact being attached to said piston means; whereby said contacts become contiguous upon sufficient acceleration of said missile.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |