Switching arrangement for electrical fuses |
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| 申请号 | US3793956D | 申请日 | 1972-01-07 | 公开(公告)号 | US3793956A | 公开(公告)日 | 1974-02-26 |
| 申请人 | PHILIPS CORP; | 发明人 | NORDGREN L; | ||||
| 摘要 | A reversible switching arrangement for a projectile capable of being detonated upon impact with a target on the one hand and at a predetermined distance from the target on the other hand. The arrangement comprises an hermetically sealed envelope adapted to be mounted at the nose of the projectile. The envelope comprises a nose and an abutting base section, that are rotated about the longitudinal axis of the projectile relative to each other to switch between the impact and the proximity fuse circuits. | ||||||
| 权利要求 | 1. An adjustable electric fuse for use in connection with a projectile, including a plurality of electric ignitor circuits capable of being activated upon impact with a target and/or at predetermined distances from said target, comprising an envelope adapted to be mounted on said projectile, said envelope including a base section, a nose section arranged for rotation relative to said base section about the longitudinal axis of said projectile, sealing means disposed between said sections, holding means for resiliently urging said sections against said sealing means, positioning means coupled to said sections for retaining said nose section in selected angular positions relative to said base section and, respectively, for axially displacing said sections when rotated between said angular positions thereby relieving said sealing means, and switching means coupled to said sections for interconnecting said ignitor circuits according to a selected angular position of said sections thereby providing for reversible switching between said circuits. 2. An adjustable electric fuse as claimed in claim 1 wherein said holding means comprises a holder ring mechanically coupling said nose and base sections together and spring means cooperating with said holder ring and adapted to press said nose and base sections towards each other in the direction of the longitudinal axis of said projectile. 3. An adjustable electric fuse as claimed in claim 1, said sealing means comprising abutting surfaces of said nose and base sections, the surface of said base section proximate to the nose of said projectile having a recess, and a sealing ring positioned within said recess. 4. An adjustable electric fuse as claimed in claim 1 wherein said positioning means comprises a ring shaped portion of the surface of said base section proximate to the nose of said projectile having radial indentations with intermediate ridges around the circumference, and a projecting portion of the abutting surface of said nose section remote from the nose of said projectile cooperating with the ring shape portion of the abutting surface of said base section to angularly rotate said nose section relative to said base section. 5. An adjustable electric fuse as claimed in claim 4 wherein said positioning means further comprises the abutting surface of said base section having a circumferential groove adjacent the ring shape portion of the surface, stops projecting out of said groove at predetermined angular positions and a guide pin projecting from said nose section into said groove to limit the angular rotation of said nose section relative to said base section. 6. An adjustable electric fuse as claimed in claim 1 wherein said switching means comprises an insulating supporting plate member coupled to the nose section, a plurality of conductive sections, on said plate member providing connections to the impact and proximity fuse circuits in the nose and base sections of the envelope, and contacting members projecting from said base section to contact the conductive sections on said plate member thereby placing one of the impact or proximity fuse circuits in operating condition. 7. An adjustable electric fuse as claimed in claim 2 wherein said positioning means comprises intermediate and locking positions, the force of said spring means being wholly or substantially absorbed by said positioning means in said intermediate positions and being appreciably absorbed by said sealing means in the locking positions. 8. An adjustable electric fuse as claimed in claim 1 further comprising locking means cooperating with said positioning means to lock said nose and base sections under the influence of inertia forces thereby allowing rotation of said nose and base sections prior to firing of said projectile and preventing rotation of said nose and base sections upon firing of said projectile. 9. An adjustable electric fuse as claimed in claim 4 wherein said projecting portion of the abutting surface of said nose section remote from the nose of said projectile comprises a plurality of groups, each group comprising a plurality of individual projections. |
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