Percussion fuse (ignition device)
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0393471
(2003-03-20)
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발명자
/ 주소 |
- Kutzli, Jö
- rg
- Guenot, Pascal
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출원인 / 주소 |
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대리인 / 주소 |
Schweitzer Cornman Gross & Bondell LLP
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인용정보 |
피인용 횟수 :
2 인용 특허 :
7 |
초록
▼
A method and apparatus for protecting and arming fuses in a projectile to satisfy safety requirements and to initiate ignition with only minimal delay. In accordance with the method, after launch of a projectile, behind a cap having a central inlet opening a safety device of a turbine/ignition pin u
A method and apparatus for protecting and arming fuses in a projectile to satisfy safety requirements and to initiate ignition with only minimal delay. In accordance with the method, after launch of a projectile, behind a cap having a central inlet opening a safety device of a turbine/ignition pin unit is released and the impeller thereof is subjected to ram pressure. The ram pressure displaces the turbine/ignition pin unit into a front position, to act as impact detector. In a device constructed in accordance with the invention, the turbine/ignition pin unit has a screw thread on its shank and is screwed into a threaded bushing so that the ram pressure displaces the unit, against the direction of flow into the front position. On impact, the rear end of the unit acts as a percussion needle and initiates an ignition chain.
대표청구항
▼
1. A method for protecting and arming a mechanical percussion fuse in a projectile having safety devices operating physically independently of one another and having a linearly displaceable striking pin or ignition pin having an electrical ignition contact, characterized in that, during launching, i
1. A method for protecting and arming a mechanical percussion fuse in a projectile having safety devices operating physically independently of one another and having a linearly displaceable striking pin or ignition pin having an electrical ignition contact, characterized in that, during launching, inertia of a mass releases a ram pressure responsive element, the striking pin or ignition pin is displaced relative to the projectile by and opposite to a ram pressure acting on the and a pressure-responsive element from a first, protected position at a rear viewed in a launching direction into a second, armed position at a front; an initiation charge is moved into a position directly rearward of the striking pin or ignition pin; and in that, on impact of the projectile, the striking pin or ignition pin initiates an ignition process by rearward displacement into a third position beyond the second position engaging the initiation charge. 2. The method according to claim 1, further characterized In that the ram pressure responsive element comprises an impeller and in that a rotation of the impeller is converted into a linear movement that displaces the striking pin or ignition pin to the second, armed position. 3. A device for securing and arming a mechanical impact fuse in a projectile having safety devices acting physically independently of one another and having a linearly displaceable striking pin or ignition pin having an electrical ignition contact wherein post-barrel safety is controlled by a turning rotor delayed by means of a clock mechanism, characterized in that at a head of the projectile there is provided an inlet opening for ram pressure, in that behind the inlet opening there is provided an impeller that is fixed to a front end of the striking pin or ignition pin, in that the striking pin or ignition pin has a screw thread on a shank and in that the thread is inserted in a screw thread of a threaded bushing and the turning rotor has an initiation charge rotatable into a position aligned with the striking pin or ignition pin when in a front position, such that the ram pressure acting on the impeller displaces the striking pin or ignition pin from a first, rear position into the front position, so that on impact of the projectile the striking pin or ignition pin initiates an ignition process by rearward displacement into a third position extending beyond the second position and engaging the initiation charge. 4. The device according to claim 3, further characterized in that the impeller includes means for closing the inlet opening when the impeller is in a front position. 5. The device according to claim 3 further including means for displacing the threaded bushing opposite to a launching direction of the projectile upon impact. 6. The device according to claim 3, further characterized in that a double mass catch is provided, to engage a rotor to determine post-barrel safety, and in that the catch releases the rotor for rotation only after reaching a predetermined degree of acceleration. 7. The device according to claim 3, further characterized in that on a tensioning shaft having a helical groove there is mounted an arming mass having lugs engaging in the helical groove, and in that the tensioning shaft rotating through the arming mass on launch of the projectile brings the rotor into an armed position during a predetermined acceleration interval. 8. The device according to claim 7, further characterized in that the tensioning shaft tensions a driving spring that loads a rotor with a torque. 9. The device according to claim 7, characterized in that a locking device is located on the arming mass, which locking device engages in the impeller and blocks the impeller prior to launching and by movement releases the impeller on launching. 10. The device according to claim 3, further characterized in that a protective cap is provided, which engages a front part of the ignition device and allows the front part to rotate. 11. Th e device according to claim 10, further characterized in that a release lug that radially displaces an arming mass catch projects into the front part. 12. The device according to claim 11, characterized in that the arming mass catch comprises two forks which, when the protective cap is in place and secured, partially engage in the displacement path of the arming mass and at the a same time axially block a turbine/ignition pin unit. 13. The device according to claim 5, further characterized in that a spring-loaded ball acts on the threaded bushing to increase the a resistance of the bushing to displacement. 14. The device according to claim 13, characterized in that the ball is located in a concave recess let into the threaded bushing.
이 특허에 인용된 특허 (7)
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Fisher Evan D. (Chevy Chase MD), Air valve safety device for bomb fuzes.
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Winterhalter Walter (Tennenbronn DEX) Schillinger Wolfgang (Schiltach DEX), Apparatus for setting the ignition timing in projectile fuses.
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Fisher Evan D. (Chevy Chase MD) Campagnuolo Carl J. (Potomac MD) Gehman Stacy E. (Takoma Park MD), Fluidic capacitance device.
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Woodall ; Jr. Robert C. (Pasadena MD) Garcia Felipe A. (Panama City FL), Hand emplaced underwater mine penetration system.
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Rehmann Robert (Neerach CHX), Method of, and apparatus for, increasing the energy in an electromagnetic fuze system.
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Hebert John R. (Cockeysville MD), Projectile with ram air-extendible probe and ram air-extendible probe assembly therefor.
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Denton Robert ; Woodall Robert ; Garcia Felipe, Reusable gas-powered war game land mine.
이 특허를 인용한 특허 (2)
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Hambric, Harry N., Infrared camera deployed by grenade launcher.
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Sutcliffe,Scott A., Modular electronic fuze.
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