An improved process for initiating explosives with maximum effciency

摘要

393,422. Detonators. LIGNOZA SPOLKA AKCYJNA, Katowice, BARCIKOWSKI, J. and KIELCZEWISKI, J., Stary Bierun, both in Poland. June 21, 1932, No. 17586. [Class 9 (i).] A primary detonating charge 1, for example of fulminate of mercury, is made up of two superposed portions 2, 3, the lower portion which comes into contact with the secondary charge 9, which may be trotyl or tetryl, being wider than the upper portion. This arrangement reduces the amount of primary charge required and may even enable the secondary charge to be dispensed with. The secondary charge may first be inserted in its casing 8, then the primary charge, and finally its covering cap 7 ; or, if the casing 8 is open at the bottom, the cap 7 may first be inserted from the bottom, then the primary charge followed by the secondary charge, after which the bottom of the casing is sealed. The primary charge may be loaded into the cap 7 before its insertion in the casing 8, and the cap may have a watertight coating 10 of rubber or cellophane.