[Electric engineering.] . u ^Mt^M^LL^J[\~\ \ of drawn copper, is made in halves A, B, which are con-nected by two springs c, one on each side of the the handle is pulled out, the half A leaves the clip E. Fig. 5. and thus stretches the springs. When the bottom bladeflies out, it leaves clip E very quickly, owing to the actionof the springs, thus drawing out the arc and breaking italmost instantaneously. The main switch on the board 17 ELECTRIC LIGHTING. shown in Fig. GO is very similar in principle. When theblade is pulled out, a follower maintains contact until theblade has been pu
[Electric engineering.] . u ^Mt^M^LL^J[\~\ \ of drawn copper, is made in halves A, B, which are con-nected by two springs c, one on each side of the the handle is pulled out, the half A leaves the clip E. Fig. 5. and thus stretches the springs. When the bottom bladeflies out, it leaves clip E very quickly, owing to the actionof the springs, thus drawing out the arc and breaking italmost instantaneously. The main switch on the board 17 ELECTRIC LIGHTING. shown in Fig. GO is very similar in principle. When theblade is pulled out, a follower maintains contact until theblade has been pulled back a considerable distance, when itflies back and thus breaks the arc. When knife switchesare used on high-tension boards, it is a common practice toseparate the blades by marble barriers, as shown in Fig. 60,in order to prevent the arc jumping from one blade to theother. 4. Fig. 6 shows the same style switch as Fig. 4, butit is mounted so as to be capable of handling higher pres-sures. The switch is constructedso as to give a long, quick break,and is mounted on insulators 1,2, S, 4- These are made of hardrubber or similar material andare grooved so as to make theleakage path from the switch partsto t
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Keywords: ., bookcentury1900, bookdecade1900, bookidelectricengi, bookyear1902
