US4524323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic coated differential sensor coil for use on a gun muzzle velocimeter
Assignee: United States Department of the Army
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Filing: 1983-06-17
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Granted: 1985-06-18
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Expires: 2003-06-17
Abstract
Abstract A differential sensor coil assembly is described which is suitable for plment at the muzzle end of a gun to measure projectile velocity, and which is more capable of resisting propellant gas and muzzle blast wear and erosion effects on the inner coil. A solid sheet coil assembly having a common inner-outer end configuration for inner and outer coil loop include a first plasma arc metal coating, a second ceramic plasma or coating and an expoxy filler means for filling the open areas between the inner and outer loop.
Inventors
- 👤 Jimmy Q. Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:57
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/64; G01P3/66; G01P3/665
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
A ceramic coated differential sensor for use on a gun muzzle velocimeter which comprises: an inner loop having a first free end and a common inner-outer end; a concentrically disposed outer loop, operatively spaced from said inner loop, having a second free end and another end integrally connected with said common inner-outer end; wire connector means fixedly attached to said first and second free ends and to said common inner-outer end; first plasma arc coating means for providing an undercoating surface to said inner and outer loops; second plasma arc coating means operatively disposed over said first plasma arc coating means for providing a wear and erosion resistance surface to said sensor; and epoxy filler means for filling the open area intermediate said inner loop and said outer loop.
Claim 2
Dependent Claim
129 words
A ceramic coated differential sensor for use on a gun muzzle velocimeter which comprises: an inner loop having a first free end and a common inner-outer end; a concentrically disposed outer loop, operatively spaced from said inner loop, having a second free end and another end integrally connected with said common inner-outer end; wire connector means fixedly attached to said first and second free ends and to said common inner-outer end; first plasma arc coating means for providing an undercoating surface to said inner and outer loops; second plasma arc coating means operatively disposed over said first plasma arc coating means for providing a wear and erosion resistance surface to said sensor; and epoxy filler means for filling the open area intermediate said inner loop and said outer loop.
Claim 3
Dependent Claim
25 words
A ceramic coated sensor as recited in claim 1 wherein said inner and outer loops comprise an assembly fabricated from a single sheet of steel.
Claim 4
Dependent Claim
21 words
A ceramic coated sensor as recited in claim 2 wherein said first plasma arc coating means includes a nickel aluminum undercoating.
Claim 5
Dependent Claim
25 words
A ceramic coated sensor as recited in claim 3 wherein said second plasma arc coating includes a layer of aluminum oxide approximately 0.020 inches thick.
Claim 6
Dependent Claim
20 words
A ceramic coated sensor as recited in claim 4 wherein said epoxy filler means includes a nonconductive epoxy filler material.
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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |