Submarine Mines And Torpedoes As Applied to Harbour Defence
Submarine Mines And Torpedoes As Applied to Harbour Defence
J Townsend Bucknill
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The firing station must, of course, be kept dry l)y means of artificial heat. Insfructinns for Operator. Caution Bell Ringing. — G deflects. Pull K. Deflection should vanisli. If not, repeat. Caution Bell not Hinging. — G deflects ; pull H. A fuze should fire. If not, repeat. G should now cease to deflect. If not, pull K, and this will occur. Plug another fuze to firing bar. With mechanical retai'dation the pull cord and handle K ai-e omitted, and the instructions are still simpler, thus : Caut...ion Bell Hinging. — ^Do nothing, whether G deflects or not. Caution Bell not Ringing. — G deflects ; pull H ; fuze should fire. If not, repeat. G ceases to deflect ; plug another fuze to firing bar. The signalling battery employed should be capable of working con- tinuously on a somewhat leaky line. A single fluid gravity Daniell cell is probably the best suited for such conditions. To avoid any possibility of accidental explosions the resistance of each cell should be such that the current on short circuit through one of the fuzes employed does not exceed 0.
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