Dunkerley, Stanley, 1870- · London, New York [etc.] Longmans, Green · leaf 191
g to the smooth portions are left, and thosebetween them slotted away. A turn of one-sixth or one-eighthof a revolution enables the block to be drawn out, and a carrier,hinged to the side of the gun, swings it clear of the bore. Mostbreech mechanisms are of the single-movement type, whereby one i8o… … Fis. 187. type is shown in Fig. 188. The breech block B is carried by thecarrier C, which turns about a fixed fulcrum, F, attached to thegun. A pin, A, projecting from the breech block, is surrounded by
Machinery, Kinematics of
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