Fuse with primer safety comprising a rotor |
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| 申请号 | US3601058D | 申请日 | 1969-04-29 | 公开(公告)号 | US3601058A | 公开(公告)日 | 1971-08-24 |
| 申请人 | FORSVARETS FABRIKSVERK; | 发明人 | ARNELL ANDERS B; GRAHN ROLF W; | ||||
| 摘要 | A fuse safety device for a nonspinning shell containing a primer such as a squib, located in a spring-loaded rotor that is turned from a safety position to an armed position after the shell has left the barrel, the fuse having a safety means comprising a short tube partly inserted in the rotor, said tube being able, upon acceleration, to pierce a central hole in a thin resilient disc fitted to the bottom of the rotor casing. The squib is electrically connected to the base of the fuse by means of a spring-loaded ball. Another safety means comprises a gross acceleration sensitive friction-operated tube contained in the rotor. | ||||||
| 权利要求 | 1. A fuse having a primer safety comprising, a rotor casing provided with a transverse bore lodging a rotor containing a primer such as an electrical squib, resilient means for turning the rotor from a safety to an armed position wherein the squib is exposed to a contact member characterized in that the rotor has an annular recess directed along a rotor radius at approximately right angles to the squib, said rotor having an opening for safety means, a short tube fully inserted into said annular recess, said tube having a free end projecting through a hole through the bottom of the rotor casing, a thin, resilient disc attached to the outside of the bottom of the rotor casing and having a hole with the same axis as the short tube, the hole in the disc being of smaller diameter than the short tube, thereby enabling the edge of the hole in the disc to urge the short tube into the bottom of said annular recess, said edge having several radially directed slits ending near the peripheral edge of the disc. 2. A fuse according to claim 1 wherein the rotor casing is attached to a bottom socket that fixes the fuse to the shell body, said socket having a central bore into which is inserted a neck portion of an insulating case that surrounds the rotor housing, the bottom of said bore having a central guide pin receiving an open tube of insulating material, said tube having such a diameter that it is able to pass through the first short tube, said tube also having an internal seat for a small metal ball that is urged into contact with said rotor, resilient means for urging the ball into contact with the rotor and acting upon the bottom of said seat and said ball. 3. A fuse according to claim 1, wherein the rotor has a second radially directed bore near its one end and approximately at right angles to the axis of the squib, said bore containing a third internally threaded, short tube having a slit along its jacket surface and extending parallel to its axis, enabling said tube to pass with resilient friction into said bore, and stop means introduced through the top wall of the rotor casing, and having a free end projecting into the slit tube with some clearance to the sides when the latter is in a fully drawn-out position before a shell is fired. |
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