The clutch assembly of the breech operating mechanism which has the large-sized compressed spring for the closed circuit

摘要

(57) Abstract The closed circuit spring (18) the cam (107) on the cam shaft (115) the breech operating mechanism which cooperates (1) the clutch assembly. The closed circuit spring (18) the cam shaft (gives the torque of front direction to 115. The spring clutch assembly (220) is arranged on the cam shaft, (115) turns the cam shaft (115) to front direction, but revolution of the cam shaft of opposite direction is obstructed.