US4577545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parallel rail electromagnetic launcher with multiple current path armature
Assignee: Westinghouse Electric Corp
•
Filing: 1984-09-13
•
Granted: 1986-03-25
•
Expires: 2004-09-13
Abstract
Abstract Electromagnetic projectile launchers utilize multiple current path armatures in an internally series augmented conductor rail configuration or an internally augmented system connected to multiple power supplies. The current paths include plasmas, conductors or combinations of both. Plasma separation is maintained by trailing insulating plasma dividers extending toward the launcher breech from arc driving faces on a projectile sabot. Arc length and/or plasma volume is reduced by conductive assemblies adjacent to the arc driving faces.
Inventors
- 👤 George A. Kemeny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:17
CPC Classifications
F; F41; F41B; F41B6/00; F41B6/006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
205 words
An electromagnetic projectile launcher comprising: four generally parallel conductors lining a bore; a source of high current; means for switching current from said high current source to said conductors; means for conducting current between a first pair of said conductors and for propelling a projectile along said first pair of said conductors; means for conducting current between a second pair of said conductors and for propelling said projectile along said second pair of said conductors; said conductors extending along the entire acceleration distance of said projectile such that said means for conducting current between said first pair of conductors and said means for conducting current between said second pair of conductors each conduct current and propel said projectile over the entire projectile acceleration distance; said means for conducting current between said first pair of said conductors including a first arc extending between said first pair of conductors; said means for conducting current between said second pair of said conductors including a second arc extending between said second pair of conductors and being substantially parallel to said first arc; and a gap between said first and second arcs wherein said first and second arcs are allowed to short as said projectile is propelled along said conductors.
Claim 2
Dependent Claim
205 words
An electromagnetic projectile launcher comprising: four generally parallel conductors lining a bore; a source of high current; means for switching current from said high current source to said conductors; means for conducting current between a first pair of said conductors and for propelling a projectile along said first pair of said conductors; means for conducting current between a second pair of said conductors and for propelling said projectile along said second pair of said conductors; said conductors extending along the entire acceleration distance of said projectile such that said means for conducting current between said first pair of conductors and said means for conducting current between said second pair of conductors each conduct current and propel said projectile over the entire projectile acceleration distance; said means for conducting current between said first pair of said conductors including a first arc extending between said first pair of conductors; said means for conducting current between said second pair of said conductors including a second arc extending between said second pair of conductors and being substantially parallel to said first arc; and a gap between said first and second arcs wherein said first and second arcs are allowed to short as said projectile is propelled along said conductors.
Claim 3
Dependent Claim
234 words
An electromagnetic projectile launcher comprising: a first conductor; a second conductor disposed generally parallel to said first conductor; a first means for propelling a projectile from a first end of said first and second conductors to a second end thereof and for conducting current therebetween, said first means including a first plasma; a first source of high current; a third conductor disposed generally parallel to and adjacent said first conductor; a fourth conductor disposed generally parallel to and adjacent said second conductor; a second means for propelling said projectile from a first end of said third and fourth conductors to a second end thereof and for conducting current therebetween and substantially parallel to current in said first plasma, said second means including a second plasma; a gap between said first and second plasmas wherein said first and second plasmas are allowed to short as said projectile is propelled along said conductors; a second source of high current; means for substantially simultaneously connecting said first source of high current to said first end of said first and second conductors and connecting said second source of high current to said first end of said third and fourth conductors; and said first, second, third and fourth conductors extending along the entire acceleration distance of said projectile, such that said first and second means for propelling each conduct current and propel said projectile over the entire acceleration distance.
Claim 4
Dependent Claim
234 words
An electromagnetic projectile launcher comprising: a first conductor; a second conductor disposed generally parallel to said first conductor; a first means for propelling a projectile from a first end of said first and second conductors to a second end thereof and for conducting current therebetween, said first means including a first plasma; a first source of high current; a third conductor disposed generally parallel to and adjacent said first conductor; a fourth conductor disposed generally parallel to and adjacent said second conductor; a second means for propelling said projectile from a first end of said third and fourth conductors to a second end thereof and for conducting current therebetween and substantially parallel to current in said first plasma, said second means including a second plasma; a gap between said first and second plasmas wherein said first and second plasmas are allowed to short as said projectile is propelled along said conductors; a second source of high current; means for substantially simultaneously connecting said first source of high current to said first end of said first and second conductors and connecting said second source of high current to said first end of said third and fourth conductors; and said first, second, third and fourth conductors extending along the entire acceleration distance of said projectile, such that said first and second means for propelling each conduct current and propel said projectile over the entire acceleration distance.
Claim 5
Dependent Claim
31 words
An electromagnetic projectile launcher as recited in claim 2, further comprising: an insulating sabot slidably and sealably disposed between said first and second conductors and between said third and fourth conductors.
Claim 6
Dependent Claim
58 words
An electromagnetic projectile launcher as recited in claim 2, wherein said means for substantially simultaneously connecting said first source of high current to said first end of said first and second rails and connecting said second source of high current to said first end of said third and fourth conductors, comprises: a pair of substantially simultaneously actuated switches.
References Cited (Backward Citations)
US1370200A
Cited
US1422427A
Cited
US4384213A
Cited
US4319168A
Cited
US4347463A
Cited
US4343223A
Cited
US4480523A
Cited
US4433608A
Cited
US4457205A
Cited
US4467696A
Cited
US4485720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |