| 摘要 |
A twin-barrel machine gun has two stationary firing chambers (16,18), a conveyor (26), and a feed system (20) mounted within a housing. The feed system 20 transfers ammunition (22) from the conveyor (26) to the firing chambers (16,18). The feed system (22) includes a sprocket (48) pivotably mounted about its central longitudinal axis. The sprocket (46) has two receptacle slot (50, 52) and two discharge slots (62,64) circumferentially spaced thereabout. The sprocket (48) is rotatable between a first and second position. The receptacle slots (50,52) each have a first position aligned with the conveyor to receive a round of ammunition and a second position aligned with a respective firing chamber. One receptacle slot is in its first position when the other is in its second position. The discharge slots also have a first position aligned with a firing chamber and a second position aligned with an outlet in the housing. One discharge slot is in its first position when the other is in its second position. An ejector cam (84) is also rotatably mounted about an axis aligned with the axis of rotation of the sprocket (48). The ejector cam is fitted within a central hollow of the sprocket. A drive gear (78,80,126,128,116,118) connected to the spocket oscillates the sprocket between its first and second positions and a second drive gear (100,102,90,112,114,116,118) oscillates the ejector cam (84) so that it laterally passes through the first and second discharge slots when in their respective second positions. The ejector cam ejects any cartridges from the discharge slot as it passes therethrough. |
