Proximity fuze improvement |
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| 申请号 | US30245672 | 申请日 | 1972-10-31 | 公开(公告)号 | US3838645A | 公开(公告)日 | 1974-10-01 |
| 申请人 | US ARMY; | 发明人 | FINGER D; WOOD G; HIGH R; HARRISON E; | ||||
| 摘要 | Projectiles utilizing proximity fuzes wherein the windshield structure thereof is capable of withstanding the buildup of static electrical charges on the surface thereof resulting in the prevention of premature functioning of said fuzes comprising in combination a conical windshield portion and a cylindrical base portion. The conical windshield comprises an electrically conductive surface capable of withstanding and rapidly dispersing electrical charges on the surface and having a surface resistivity of between about 1.0 and 200 megohms per square. | ||||||
| 权利要求 | 1. A windshield for proximity fuzes capable of withstanding the buildup of static electrical charges on the surface thereof resulting in the premature functioning of said fuzes, comprising in combination a conical windshield portion and a cylindrical base portion, said conical windshield portion comprising an electrically conductive surface capable of withstanding and rapidly dispersing electrical charges on said surface and having a surface resistivity of between about 1 and 200 megohms per square. 2. 115 parts per 100 parts resin of a solvent mixture consisting of about 35 percent methylisobutylketone, 15 percent butyl alcohol and 50 percent xylene; 2. A windshield structure of claim 1 wherein said conical windshield portion has a surface resistivity of about 1.0 to 40 megohms per square and a heat deflection temperature of at least about 120* C. 3. The windshield structure of claim 1 wherein the electrically conductive surface of said conical windshield portion consists essentially of a conductive material dispersed throughout the surface of said windshield. 3. about 3.3 parts carbon black per 100 parts resin; 4. about 10 parts 2,4-ethylmethylimidazole per 100 parts resin; 4. The windshiEld structure of claim 1 wherein said conical windshield portion comprises a coating of a temperature resistant, electrical insulating plastic material having a conductive material dispersed therein, said coating covering at least a portion of the surface of said windshield. 5. The windshield structure of claim 4 wherein said plastic material is selected from the group consisting of epoxy, phenolic, butyl, silicone, and polyimide based resins. 5. about 5 parts of a flowing agent per 100 parts resin; and 6. about 0.24 parts defoaming agent per 100 parts resin. 6. A composition useful for forming a coating on windshields for proximity fuzes comprising: (1) a base resin which can be easily adhered to the surface of the windwhield and does not degrade over long periods of time; (2) an inert volatile solvent; and (3) a powdered or fibrous conductive material. 7. A composition according to claim 6 wherein said base resin is an epoxy resin. 8. A composition according to claim 7 further comprising a curing agent for said resin and capable of imparting a heat deflection temperature for the cured coating of at least about 120* C. 9. A composition according to claim 8 wherein said curing agent is selected from the group consisting of diethylenetriamine, 2-ethyl-4-methylimidazole or diethylaminopropylamine. 10. A composition according to claim 6 wherein said inert volatile solvent is selected from the group consisting of ketones, aromatics, esters, saturated hydrocarbons, cyclic hydrocarbons, alcohols and mixtures thereof. 11. A composition according to claim 6 wherein said conductive material is carbon black. 12. A composition according to claim 6 comprising: |
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