GB417090A - An automatic projectile fuze setting apparatus - Google Patents

Abstract

417,090. Setting projectile fuzes. RHEINISCHE METALLWAAREN-UND MASCHINENFABRIK, 195, Ulmenstrasse, Derendorf, and GIETMANN, A., 49, Hugo-Viehhoffstrasse, both in Diisseldorf, Germany. Dec. 14, 1933, No. 35219. [Class 9 (i).] In automatic fuze-setting apparatus for projectiles, the projectile is retained in the setting socket by a locking device which is released only upon the issue of an order to fire the gun. The locking bolt b retaining the projectile a in the setting socket (not shown) is under the control of a wedge-ended lever c actuated by a solenoid d which is in circuit with a battery e and contacts for four armatures m, m<1>, m<2>, f, the circuit being completed to release the locking bolt b only when both (1) the solenoids l, l<1>, l<2> are energized consequent on the fuze being correctly set and (2) the solenoid f, which is in circuit with a battery u<1> is energized by the closing of a switch u<2> giving a signal at u for the gun to be fired. The fuze-setting is signalled from a transmitter o having three concentric rows of contacts for units, tens and hundreds of a three place setting figure, and corresponding contact arms r, r<1>, r<2>. A battery q is in series with the contact arms and thence by way of the selected contacts on the transmitter and lines s, t with corresponding contacts on a control k, the circuit being completed through contact arms n, n<1>, n<2>, lines v, v<1>, v<2>, solenoids l, l<1>, l<2> and return lines x q<1>. The contact arms n, n<1>, n<2> are intergeared in the ratio 1 : 10 : 100 and are driven in synchronism with corresponding contact arms i, i<1>, i<2> on an indicator p by means of a crank y and gearing 2, 3, 4, 6, 7. Lamps on the indicator p are in series with the corresponding contacts on the control k so that a signal is given and the solenoids l, l<1>, l<2> are energized when the control k repeats the setting given by the transmitter o.