| 摘要 |
An improved arrangement for selectively transferring munitions shells from a pair of opposed feed sprockets to a movable breech block of an automatic weapon is described. A pair of displacement blocks are supported for vertical movement in mutually opposite directions in vertical planes disposed between the feed sprockets and forming upward extensions as a pair of shell-stripping projections on the moving breech. Shell-receiving seats are defined on each of the displacement blocks by a pair of superposed, normally parallel support elements and the intermediate portion of the block. A reversible pinion is drivingly connected to a pair of confronting tooth racks extending from the upper ends of the respective displacement blocks. The pinions and racks are so situated that when the shell-receiving seat on one of the blocks is in its lower most position in cooperative relation with the underlying shell-stripping region of the breech, the other of the block is in an upper position out of contact with the other of the shell-stripping regions. In an intermediate position of the blocks when the seats are aligned, both of the seats are out of contact with the respective underlying shell-stripping regions to define a safety position of the shell transfer mechanism.
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