α. 1800s Balls stamp, 1800s– Ball's stamp.
β. 1800s– Ball stamp.
单词 | ball stamp |
释义 | Ball stampn.α. 1800s Balls stamp, 1800s– Ball's stamp. β. 1800s– Ball stamp. Now historical. A stamp mill utilizing a steam hammer, formerly used in the United States for crushing ore. ΘΚΠ society > occupation and work > equipment > equipment for treating ores > [noun] > for crushing ore stamping-mill1552 bucker1653 buck1683 stamp-mill1752 Ball stamp1860 jaw-breaker1877 jaw-crusher1877 spaller1877 arrastre1881 trapiche1881 gravitation stamp1894 ball mill1895 gravity stamp1903 slugger1903 tube-mill1909 1860 Mining Mag. & Jrnl. Geol. 1 236 Two new heads of Ball's Stamps are now being erected, under the personal supervision of the inventor. 1873 O. D. Ashley Copper Mines Lake Superior 23 Mines extensively opened, and fully provided with all necessary surface improvements and machinery, including four heads of Balls Stamps. 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 105 Ball-Stamp, a stamp for crushing rock, operated directly by steam power. 1891 Jrnl. U.S. Assoc. Charcoal Iron Workers 9 50 The process includes crushing the ore by a Blake rock-breaker on the dump;..passing it under two Ball stamps, provided with screens of 5/16-inch mesh; [etc.]. 1909 Mining & Statistic Mag. 229 The work on Ball's stamps is progressing rapidly. 1991 L. Lankton Cradle to Grave iii. 56 By the 1870s, Ball stamps carried 12- to 15-inch pistons,..reciprocated a weight of 4,500 pounds, and delivered 90 blows per minute. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online December 2021). < n.1860 |
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