The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . he oppositedirection, without showing signs of fracture. It will be seen thatthe wire is extremely strong and the moderate stress of from 35to 50 tons per square inch, which at most it is called upon to with-stand in a gun, is far less than what it could endure with perfectsafety. The wire after being manufactured is made up into hanks forstorage purposes; but when required for gun construction it isthoroughly cleaned and wound on a drum R about 3 ft. 6 in. indiameter, which is placed in one porti
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . he oppositedirection, without showing signs of fracture. It will be seen thatthe wire is extremely strong and the moderate stress of from 35to 50 tons per square inch, which at most it is called upon to with-stand in a gun, is far less than what it could endure with perfectsafety. The wire after being manufactured is made up into hanks forstorage purposes; but when required for gun construction it isthoroughly cleaned and wound on a drum R about 3 ft. 6 in. indiameter, which is placed in one portion of the machine in connexionwith a powerful band friction brake M. The wire is then led to thegun A placed between centres or on rollers parallel to the axisof the wire drum. By rotating the gun the wire is drawn off from thedrum against the resistance of the band brake, which is so designedthat, by adjusting the weight S suspended from the brake strap,any desired resistance can be given in order to produce the necessarytension in the wire as it is being wound on the gun. The stress on. Fig. 20.—Wire-winding Machine HISTORY AND CONSTRUCTION) ORDNANCE 197 the wire is indicated on a dial, and the headstock, containing thedrum of wire, is capable of being moved along the bed G by aleading screw H, driven by a belt through variable speed cones I;the belt is moved along the cones by forks J, traversed by screws K,which in their turn are actuated by chain belts from the handwheel L. The traversing speed is regulated to suit the speed ofwinding by moving the belt along the speed cones. The wire is rectangular in section, 025 in. wide and 0-o6 in. thick,and after it has been wound on to the gun it presents a very evensurface which requires little further preparation. The diameterover the wire is gauged and the jacket or other covering hoop iscarefully bored equal to this, if no shrinkage is to be allowed; or thedimension is diminished in accordance with the amount of shrinkag
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Keywords: ., bookcentury1900, bookdecade1910, bookidencyclopdiab, bookyear1910
