Patent GB-334550-A (GB)
Title: Improvements relating to machines for setting projectile fuzes
IPC: F42C17/00
Filed: 1929-06-05
Abstract: 334,550. Rheinische Metallwaarenund Maschinenfabrik, and Schuler, H. June 5, 1929. Projectile fuzes, apparatus for setting.-Relates to apparatus comprising two socket members A, B, Fig. 2, with spring pawls a, b adapted to engage the projectile and timing ring respectively and to rotate one relatively to the other tp set the fuze. According to the invention, (1) one member B is connected to a power or hand-operated mechanism m, Fig. 1, by a coupling k controlled by the insertion of a projectile in the sockets and by the setting operation, and (2) the other member A is connected to a mechanism h, which sets it in accordance with range and elevation of target. The two sockets A, Bare rotatably mounted in a casing C. The socket A is geared by a toothed rim a' to a sun wheel D adjusted by the mechanism h coupled to a pointer z', which is kept by the mechanism h opposite a mark z<2> controlled from a distance according to the fuze setting required. The insertion of a projectile in the sockets depresses a central plunger b<3> against a spring f, and a spring pawl b<8> carried by the plunger at the same time engages a lug s on a ring S and depresses that ring until the pawl is deflected from the lug s by a stop b<10>. The ring S remains held down by the pawls a, b which are wedged against the ring S by the inserted projectile. The ring S when thus depressed also depresses a ring s<3> which in turn depresses sleeves d, i against springs f<4>, f<5>. Lugs d<2>, i<2> on these sleeves then leave notches in the hub b<5> of the socket B and in the hub of the coupling k screwed on the hub b<5>, whereupon a spring f<@> between lugs on the socket B and the coupling k causes a partial unscrewing of the coupling round the boss of the socket B. This brings a crown of teeth on the coupling k into engagement with a crown of teeth g<2> on a member g geared by a toothed rim g' with a. sun wheel E kept in rotation by the mechanism m. The projectile and its time ring are thereby rotated until the pawls a, b snap into their respective notches, this rotation setting the fuze in accordance with the setting received by the mark z<2>. When the pawls a, b snap into their recesses, they allow the ring S, the ring s<3>, and the sleeves d, i to rise. The lug d<2> of the sleeve d first locks the member B, while the coupling member k continues to be driven by the member g. This continued rotation stresses the spring f<3> and screws the coupling member k up the boss of the member B and away from the member g. When the coupling member becomes disengaged from the member g it is locked by the lug i<2> of the sleeve i. The projectile may now be removed and a fresh one inserted, when the fuze is again set automatically. The setting operation may be indicated by a lamp r<2> which is switched off when a projectile is inserted and on when the projectile is removed, a switch member r being raised bv a spring f<6> to close the lamp circuit and being depressed by a rod t acted upon by the sleeve d when a projectile is inserted. The angular position of the lugs d<2>, i<2> may be adjusted by a partial rotation of the spindle c on which the sleeves d, i are slidably but non-rotatably mounted, the spindle c being secured in adjusted position by a nut c<2>. The drawing shows two such apparatus operated by the same sun wheels D, E; more than two apparatuses may be similarly operated.