Patent US3750585A successfully refreshed from Google Patents.
US3750585A
Expired / Lapsed
US
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Tracer projectiles
Assignee: Pacific Technica Corp
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Filing: 1969-09-23
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Granted: 1973-08-07
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Expires: 1989-09-23
Abstract
Abstract A tracer projectile having an ablative material attached to at least a portion of the exterior surface of the projectile body, such material preferably having a relatively low flash temperature whereby it is ignited by aerodynamic heating effects to produce an illumination during the projectile''s flight to a target. The ablative material preferably may be attached by means of a bonding agent having a low coefficient of thermal conductivity to provide a heat barrier between the ablative material and the projectile body.
Inventors
- 👤 F Feldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:33
CPC Classifications
F; F42; F42B; F42B14/00; F42B14/06; F42B14/064; F42B12/00; F42B12/02; F42B12/36; F42B12/38
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
32 words
A projectile in accordance with claim 1 wherein said tracer material is a composition comprising depleted uranium powder having an approximate flash temperature of 400* F and a density of 11.5 g/cc.
Claim 2
Dependent Claim
53 words
A projectile in accordance with claim 1 wherein said tracer material is a composition comprising 88 percent by weight of depleted uranium powder and 12 percent by weight of nickel powder, such composition having an approximate flash temperature in the range of 600* F to 700* F and a density of 10.0 g/cc.
Claim 3
Dependent Claim
53 words
A projectile in accordance with claim 1 wherein said tracer material is a composition comprising 78 percent by weight of depleted uranium powder and 22 percent by weight of aluminum powder, such composition having an approximate flash temperature in the range from 600* F to 700* F and a density of 5.0 g/cc.
Claim 4
Dependent Claim
52 words
A projectile in accordance with claim 1 wherein said tracer material is a composition comprising 75 percent by weight of a depleted uranium powder and aluminum powder compound and 25 percent by weight of Teflon powder, such composition having an approximate flash temperature of 500* F and a density of 5.9 g/cc.
Claim 5
Dependent Claim
50 words
A projectile in accordance with claim 1 wherein said tracer material is a composition comprising 96 percent by weight of magnesium, 3 percent by weight of aluminum and 1 percent by weight of zinc, such composition having an approximate flash temperature of 900* F and a density of 1.77 g/cc.
Claim 6
Dependent Claim
50 words
A projectile in accordance with claim 1 wherein said ablative material is a composition comprising 96.3 percent by weight of magnesium, 3 percent by weight of thorium, and 0.7 percent by weight of zirconium, such composition having an approximate flash temperature of 900* F and a density of 1.8 g/cc.
Claim 7
Dependent Claim
48 words
A projectile as defined in claim 1 in which the tracer material is bonded to the projectile body with a material having adhesive characteristics and a low co-efficient of thermal conductivity for providing a barrier to the transfer of heat between said tracer material and said projectile body.
Claim 8
Dependent Claim
41 words
A projectile as defined in claim 1 in which said projectile body has a main body section and a nose section conically shaped and wherein said tracer material is bonded to the nose section in the form of a conical shell.
Claim 9
Dependent Claim
23 words
A projectile as defined in claim 1 wherein said tracer material is bonded to the nose in the form of a conical shell.
Claim 10
Dependent Claim
21 words
A projectile as defined in claim 1 in which the tracer material has a density between 5.0 g/cc and 11.5 g/cc.
Claim 11
Dependent Claim
21 words
A projectile as defined in claim 1 in which a heat barrier is interposed between the tracer material and projectile body.
Claim 12
Dependent Claim
47 words
A projectile as defined in claim 1 in which the projectile has a blunt nose and in which the tracer material is in the form of a windshield attached to and covering the blunt nose of the projectile body to reduce the aerodynamic drag of the projectile.
References Cited (Backward Citations)
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Cited
US2368029A
Cited
US3243313A
Cited
US3395035A
Cited
US3348485A
Cited
US3270503A
Cited
US3565706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |