The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . ith the pinion Eand draws the breech screw out of the gun into the carrier ring C,which finally swings on the axis pin and clears the breech open-ing. While the opening is being performed the firing lock L isoperated by the cam groove A*; this puts the firing mechanism,either electric or percussion, to safety by withdrawing the firingneedle, extracts the fired tube and leaves the primer chamber openfor a fresh primer. All these operations are performed in the reverseorder on closing. With both the
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . ith the pinion Eand draws the breech screw out of the gun into the carrier ring C,which finally swings on the axis pin and clears the breech open-ing. While the opening is being performed the firing lock L isoperated by the cam groove A*; this puts the firing mechanism,either electric or percussion, to safety by withdrawing the firingneedle, extracts the fired tube and leaves the primer chamber openfor a fresh primer. All these operations are performed in the reverseorder on closing. With both these types of mechanism the de Bange system ofobturation, with the pad only slightly coned, is used. With smaller guns the mechanism is simpler, as less power is required for opening the breech. Thus, with the 6-in. gun MarkIV., introduced about 1885 (fig. 42) the breech is opened in threeseparate operations—(a) the cam lever, which also locks the breech,is raised into the vertical position and pulled over to the left; thisdisengages the screw threads; (6) the cam lever is folded down so.
Size: 1950px × 1282px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidencyclopdiab, bookyear1910
