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    • 7. 发明授权
    • Firing circuit
    • 点火电路
    • US4088075A
    • 1978-05-09
    • US702652
    • 1976-07-06
    • Robert A. Hayman
    • Robert A. Hayman
    • F42C11/00F42C15/14
    • F42C11/00
    • The firing circuit comprises a direct current voltage source having negat and positive terminals connected, respectively, to first and second terminals of a firing network. The network comprises first and second resistors connected, respectively, to the first and second network terminals. A diode, a silicon controlled rectifier (SCR), an electrical detonator and a third resistor are connected in series with each other and in parallel with the first and second terminals, respectively, with the anode of the diode connected to the cathode of the SCR, and the gate of the SCR connected to the junction of the first and second resistors. A capacitor and a fourth resistor are connected in parallel with the combination of the SCR and the detonator. In a modification, a Zener diode is connected in parallel with the capacitor. The circuit is designed to be normally energized without firing the SCR and detonator, and to fire the SCR and detonator if: the voltage source is (1) suddenly disconnected from the network or (2) rapidly decreased; or (3) the input terminals of the network are short-circuited, or (4) too high a voltage is applied to the network.
    • 点火电路包括具有分别连接到点火网络的第一和第二端子的负极和正极端子的直流电压源。 网络包括分别连接到第一和第二网络终端的第一和第二电阻器。 二极管,可控硅整流器(SCR),电雷管和第三电阻器分别与第一和第二端子串联连接并且与二极管的阳极连接到SCR的阴极 ,并且SCR的栅极连接到第一和第二电阻器的结点。 电容器和第四电阻器与SCR和雷管的组合并联连接。 在修改中,齐纳二极管与电容器并联连接。 电路设计为正常通电而不点火SCR和雷管,并在以下情况下触发SCR和雷管:(1)电压源突然与网络断开或(2)迅速下降; 或(3)网络的输入端子短路,或(4)电网电压过高。
    • 8. 发明授权
    • Mechanical counting fuze
    • 机械计数
    • US3613593A
    • 1971-10-19
    • US3613593D
    • 1965-03-30
    • RICHARD G THRESHERJOHN P KOSARJAMES F HARPER
    • THRESHER RICHARD GKOSAR JOHN PHARPER JAMES F
    • F42C7/00F42C7/02F42C14/08F42C15/14F42C15/24
    • F42C7/02F42C7/00F42C14/08
    • 1. A fuze comprising A BODY WITH AN UPPER AND A LOWER END HAVING A MAIN AXIAL BORE THERETHROUGH, SAID BODY LOWER END HAVING AN AXIAL BORE SMALLER THAN SAID MAIN BORE AND HAVING RADIAL GROOVE MEANS IN THE WALL DEFINING SAID SMALLER BORE, A HOLLOW OUTER PLUNGER MEMBER SLIDABLY MOUNTED IN SAID MAIN BORE, AN INNER PLUNGER MEMBER MOVABLY MOUNTED IN SAID OUTER PLUNGER MEMBER AND COAXIAL THERETHROUGH, A FIRING PIN RELEASABLY SECURED TO THE LOWER END OF SAID INNER PLUNGER MEMBER, CAM MEANS FIXED ON THE END OF SAID OUTER PLUNGER MEMBER, CAM FOLLOWER MEANS CARRIED BY SAID INNER PLUNGER MEMBER SO CONSTRUCTED AND ARRANGED THAT UPON RELATIVE DOWNWARDLY DIRECTED AXIAL MOVEMENT OF SAID OUTER PLUNGER MEMBER WITH RESPECT TO SAID BODY THE CAM MEANS WILL ACT ON SAID FOLLOWER MEANS TO IMPART A LIMITED ROTATIONAL MOVEMENT TO SAID INNER PLUNGER MEMBER, MEANS PREVENTING ROTATIONAL MOVEMENT OF THE OUTER PLUNGER MEMBER WITH RESPECT TO SAID BODY, A RESILIENT MEANS OPERATIVE BETWEEN SAID FIRING PIN AND SAID INNER PLUNGER MEMBER, SAID RESILIENT MEANS ARRANGED TO OPPOSE RELATIVE DOWNWARDLY DIRECTED AXIAL MOVEMENT OF SAID INNER PLUNGER MEMBER WITH RESPECT TO SAID BODY, TAB MEANS RADIALLY FIXED ON SAID FIRING PIN AND SO ARRANGED AND CONSTRUCTED AS TO ALIGN WITH SAID GROOVE MEANS WHEN SAID INNER PLUNGER MEMBER IS ROTATIONALLY ADVANCED WITH RESPECT TO SAID OUTER PLUNGER MEMBER BY A PREDETERMINED NUMBER OF AXIAL RECIPROCATIONS OF SAID OUTER PLUNGER MEMBER WHEREBY SAID FIRING PIN IS FREED TO MOVE DOWNWARDLY UNDER THE FORCE OF SAID RESILIENT MEANS.