Патент USA US2113202код для вставки
April 5, 1938. , |__ STANGE 2,113,202 AUTOMAT I C GUN Filed Oct. 10, 1956 @e Q’ a Lf" I, 1, 6' \ \ l ú \ \ \ H _"_î ____ F \ ß ._________________/4 Patented Apr. 5, 1938 2,113,202 UNITED STATES PATENT oFFicE _ 2.113.202 ' AUTOMATIC GUN Louis Stange, Sommerda, Germany, assignor to> Rheinmetall-Borsig Aktiengesellschaft, Dussel dori', Germany, a corporation of Germany Application Octpbel' 10, 1936. Serial No. 105,094 In Germany May 29, 1933 1 Claim. (Cl. 89-33) This invention relates to automatic guns in which the breech block in its forward motion 5 ( 10 l5 a pin b2 a lever e which serves to push the car tridges forward. The lever e is urged by a spring pushes the cartridge from the supply device, ei to rotate in such a direction that its front end such as a magazine or belt. into the barrel. Ac , projects from the side of the breech block. The cording to the invention, the surface on the nose ez of _the lever e, therefore, projects towards 5 breech block which engages with the cartridge the cartridge f which is lying in the belt await in order to load it into the barrel ls arranged so ing loading, so that when the breech block moves as to be yieldable -in a direction transverse to backwards, the lever e is moved against the ac the direction of movement of the block. tion of the spring e1 and is pushed into the slot By the invention _the cartridge belt or the mag b1 as is shown in Fig. 2. azine plate is advanced to feed a cartridge for After the lever e has passed the rim of the ward when a cartridge is pushed into the barrel cartridge f, it is freed and moved out of the slot by the advancing breech block, whereas hither by the spring e1 until its rear end bears on the to this feeding motion of the belt or magazine base of the slot b1 (Fig. 3). As the breech block could only occur after recoil. As a result of the now moves forward, the nose ez of the lever e, invention an increase in the speed of ñre is made now bears on the cartridge base and pushes the possible,- since the yielding surface of the breech cartridge f from its holder f1 (Fig. 3) into the block can engage with the foremost cartridge earlier than heretofore, and the whole contents of 20 the magazine or belt can be advanced into the cartridge chamber of the gun.l In the example shown, in which the cartridges are fed in the known half-open belt grippers, the belt is advanced through the distance between position'in which the leading cartridge is in the path of the breech block. Furthermore, the fric tion between the recoiling breech block and the leading cartridge waiting to be loaded is less 25 than hitherto. In carrying out the invention, the magazine or belt is given such a position in the gun that the foremost cartridge which is next to be loaded lies outside the path of the rigid part of the breech block, and rests only in 30 that of the yielding surface. The invention further makes it possible to arrange that the breech block does not have to advance the cartridge belt during its recoil move ments. Failures in loading owing to insu?cient 35 recoil energy are thus avoided. 'I‘he belt is ad vanced through the distance between adjacent cartridges during the forward motion of the breech block immediately after the leading car tridge has been pushed from the belt, and the 40 next cartridge is already in position during the iiring of the _previous charge to be engaged by the yieldable member of the breech block, which member slips over the cartridge when the breech block recoils. The invention is illustrated by the accompany 45 ing drawing in Which Figs. 1-3 show longitudinal sections of a gun in which the breech block is respectively in its foremost intermediate and hindmost positions. The breech block b is longitudinally movable 50 in the receiver a and can be bolted to the slid ably mounted barrel c in known manner by a locking collar d which is rotatable in guides in the receiver. In a. slot b1 in the forward part of 55 the breech block b there is pivotally mounted on 0 adjacent cartridges by the forwardly moving breech block immediately after the leading car tridge has been pushed from vthe belt; that is while the cartridge is being introduced into the 2 cartridge chamber. To do this the rear end of the breech block b has ñxed to it a projecting member In which is guided in a cam groove g1 formed in a controlling drum g which is mount ed on the axle i oi’ the belt-advancing wheels h. 3o The whole of the belt-advancing apparatus is ar ranged in a housing k which can be placed on the gun receiver and detachably secured thereto by a spring catch I in such manner that it can be easily removed. The controlling drum g is con- 35 nected to the sleeve h1 which carries the belt advancing wheels h, by a unidirectional clutch connection. The latter consists in saw-tooth notches g2, ha. The pitch of these teeth corre sponds to the inclination of the cam groove g1, 40 i. e. to the distance between adjacent cartridges. When the drum g is rotated by the forwardly moving breech block, the belt-advancing wheels h are caused to rotate, while when the drum is rotated in the reverse direction by the backward ly moving breech block, the drum g moves rela tively to the sleeve h1 as a-result of the forma tion of the saw teeth g2, y which operate in the usual manner. To make this relative movement possible, the sleeve hi is axially movable on the axle i against the action of a spring ha. In order to avoid accidental rotation, further saw-toothed notches h4 (Fig. 2) are provided on the end of the sleeve h1 remote from the drum g, and these prevent the sleeve from rotating, as a result of 2,113,202 block moves back. by their engagement with lever e now meets the base of the cartridge f and pushes it out of the holding member of the belt counter teeth m which are secured on the cover 1c and are prevented from rotating by means of a or the magazine groove. In a gun in which the cartridges are fed by a belt, the projecting mem the rotation of the drum g, when the breech longitudinal guide member k1. On firing, the ber be on the breech block begins, as soon as the barrel c and the breech block bolted thereto by the collar d recoil together. The collar dis then rotated in known manner to release the breech block While the latter moves rectilinearly; the barrel c and collar d then come to rest while the breech block c’ontinues to recoil. During the re coil movement the projecting member b3 travers cartridge has been removed from the belt grip per, to traverse the cam groove U and during the remainder of the forward movement of the es the cam groove gi of the control drum a, and rotates the latter. The sleeve h1 together with 15 the belt-advancing wheels, are, however, unaf fected by this rotation of the drum in conse quence of the action of the coupling members g2, h2, h4, m, he. After or during this idle rotation of the drum 20 g into the position from which it can advance the .. 25 breech block into the position of Fig. 1, advances the belt through a distance corresponding to the 10 distance between adjacent cartridges in the belt. Thus while one cartridge is being fired, the next is already in a position to be moved forward by the breech block, but the breech block experi ences no load and can recoil freely. I claim: An automatic gun having a longitudinally movably breech block, a pusher on said breech block displaceable in a direction transverse to the length of the breech block, a belt having half 20 open grippers carrying the cartridges, and means for. advancing the belt controlled by the for ward stroke of the breech block after the re moval of the foremost cartridge from the belt and delivering the next cartridge immediately in 25 the path of the pusher, the actuating means for cartridge belt, the lever e projecting from the surface of the breech block bears against the cartridge f and is moved back thereby into the groove b1 (Fig. 2) until the nose er has passed the rim of the cartridge and it can return under the action of the spring e1 into the operative position seen in Fig. 3. The recoil of the breech advancing the belt being removed inactive by block now ends and, if the block is free to move the rearward stroke of the' breech block in the forward owing to the trigger being pressed, the 30 block is advanced -by the spring p which was compressed during recoil. The nose e2 of the operative position for the next forward stroke of ` the breech block. LOUIS STANGE.