Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . d forming part of the headof the cartridge. Per-cussion-cap Hold- er. A s] uitsmans device forliuldiug (_a])s in such way as tobe ivadily attached to the nip-ple of the iiiece. The caps arearranged in a groove and fedtoward the opening by a spring. One is alwayspresented at the point of discharge in convenientposition to be slipped over the ni] pie, and then wit
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . d forming part of the headof the cartridge. Per-cussion-cap Hold- er. A s] uitsmans device forliuldiug (_a])s in such way as tobe ivadily attached to the nip-ple of the iiiece. The caps arearranged in a groove and fedtoward the opening by a spring. One is alwayspresented at the point of discharge in convenientposition to be slipped over the ni] pie, and then with-drawn fruin the case by a jiull. The next in seiiesimmediately assumes the place at the opening. Per-cussion-cap Triniming-ma-chine\ Fortrimming the edges of cap-bodies after they havebeen formed by the dies. The caps are placed in perforations in a plate and passed be-neath a rotating cutter-disk to trim the edge Fig 3636 showsa machine of this character, in which b is a bearing for shaft r,which carries the cutter i. c is a pulley round which the driv-ing-belt , and / is a gage or lever to raise and depress thecutter-shaft, so that it may operate on the caps as they arebrought beneath the cutter. Fig. Per-cussion-fuse. (Ordnance.)A fuse in a projectile set in action byconcussion when the projectile .?strikesthe object. Percussion-Fuse. In the example, A represents a shell. Aplunger h held by a spring / ami detent o, which engages in anotch at its rear end, is released by withdrawal of the detentoccasioned by the shock of impact, and strikes a nipple g onwhich is a percussion-cap. Per-cussion-grinder. A niachine for crushingquartz or other hard material by a combined rub-bing and pounding process. PERCUSSION-LOCK. 1666 PERFECTING-PRESS.
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Keywords: ., bookcentury1800, booksubjectin, booksubjectmechanicalengineering
