The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . med with thefront part conical and the rear cylindrical, to facilitate its entranceinto the gun, and also its exit; this form, moreover, is taken ad-vantage of by cutting the interruptions in the screwed surfacealternately on the coned part and on the cylindrical part, so thatthere is a screwed surface all round the circumference of the breechscrew. By this means the stress is taken all round the circumference,both of the breech screw and in the gun, instead of in portionsalternately, as with othe
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . med with thefront part conical and the rear cylindrical, to facilitate its entranceinto the gun, and also its exit; this form, moreover, is taken ad-vantage of by cutting the interruptions in the screwed surfacealternately on the coned part and on the cylindrical part, so thatthere is a screwed surface all round the circumference of the breechscrew. By this means the stress is taken all round the circumference,both of the breech screw and in the gun, instead of in portionsalternately, as with other forms. The Bofors breech screw is a modification. The surface is formedof a truncated ogive instead of a cylinder and cone, and the threadedportions are not alternate. In the older types of mechanism for heavy guns the breechwas opened in from three to four different operations which involvedconsiderable loss of time. Fig. 40 shows the general type for o-2-in.,10-in. and 12-in. guns. To open the breech the cam lever Cwas folded up so that it engaged the pin B in connexion with the.
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Keywords: ., bookcentury1900, bookdecade1910, bookidencyclopdiab, bookyear1910
