The mariners' handbook; a convenient reference book for navigators, yachtsmen, and seamen of all classes (1906)
International Correspondence Schools, Roden, Ernest Konrad, 1866-, International Correspondence Schools. Pocketbook · Scranton, Pa. : International Textbook Co. · leaf 235
eless powderare very slow of ignition, a considerable quantity of blackpowder is used in the base of the charge. This is calledthe ignition charge. All primers are vent-sealing; that is,they are made of metal thin enough to be expanded againstthe walls of the recess that contains them, and thus… … Fig. 5 cartridge cases of fixed ammunition. The striking of thehammer on the primer explodes the fulminate of mercuryimmediately under it, and the flame from this ignites theblack powder in the magazine. The ordinary form of electric primer for fixed ammunitionis shown in Fig. 6. The electric…
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