Patent US3857050A successfully refreshed from Google Patents.
US3857050A
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Magnetic decelerator for projectiles and system of deceleration and recovery thereof
Assignee: United States Department of the Army
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Filing: 1971-06-04
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Granted: 1974-12-24
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Expires: 1991-06-04
Abstract
Abstract A magnetic decelerator for projectiles and system of deceleration and recovery providing for economically recovering the projectiles undamaged. The projectile includes a magnetic permeable slug or the like of predetermined shape and size formed therein. A magnetic field is created between north and south pole pieces having electrically conductive facings thereon. As the projectile and slug therein pass between the pole pieces the movement of the slug through the magnetic flux lines induces ring currents in the conductive pole piece facings, which cause the deceleration and dissipation of energy of the projectile.
Inventors
- 👤 F Harris
- 👤 E Resler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:55
CPC Classifications
F; F41; F41J; F41J13/00; F42; F42B; F42B35/00; H; H02; H02K; H02K49/00; H02K49/02; H02K49/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
In a system for decelerating a projectile moving along a path at a given velocity, in combination, a magnetic-permeable slug carried by said projectile; means for generating a magnetic field in a substantially transverse direction to said path, said means including north and south pole pieces having substantially planar parallel surfaces disposed on opposite sides of said path; and conductive facing means on said planar surfaces for producing a deceLerating force on said projectile in response to ring currents induced in said conductive facings due to the interaction of said magnetic field and said slug passing therethrough.
Claim 2
Dependent Claim
97 words
In a system for decelerating a projectile moving along a path at a given velocity, in combination, a magnetic-permeable slug carried by said projectile; means for generating a magnetic field in a substantially transverse direction to said path, said means including north and south pole pieces having substantially planar parallel surfaces disposed on opposite sides of said path; and conductive facing means on said planar surfaces for producing a deceLerating force on said projectile in response to ring currents induced in said conductive facings due to the interaction of said magnetic field and said slug passing therethrough.
Claim 3
Dependent Claim
12 words
A system according to claim 1, wherein said conductive faces are copper.
Claim 4
Dependent Claim
13 words
A system according to claim 1, wherein said slug is rectangular in shape.
Claim 5
Dependent Claim
23 words
A system according to claim 1 wherein a portion of said ring currents pass through said faces in the area of said slug.
References Cited (Backward Citations)
US3300744A
Cited
US3337760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |