File:Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892) (14767120091).jpg

Identifier: modernmechanisme00benj (find matches)
Title: Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics
Year: 1892 (1890s)
Authors: Benjamin, Park, 1849-1922
Subjects: Mechanical engineering
Publisher: New York, D. Appleton
Contributing Library: Mugar Memorial Library, Boston University
Digitizing Sponsor: Boston University

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h pure gum-rubber packing. This arrangement relieves the shock on the piston, and alsopermits removal of the piston for repairs without disturbing the stamp. The piston is made of steel and fitted with bronze packing-rings, and is easy of access forpacking and repairing when necessary. The water is fed in through the two nozzles shown onthe top of the mortar, and from the circular chamber is thrown against the stamp-stem from€very side, preventing it from being cut and worn by the sand. The ore-feed, or spout, isplaced on top of the mortar, and is covered over to prevent any pieces of ore from falling ORE-CRUSHING MACHINES. 580 pacitv of the 15 x 30 in. stamp averages ^^out UOtons hne cr fe, ^ ^^ ^^^^Tamarack crushing T)er 24 hours. A stamp of this ^ifjeif s^O tons in rnnum^ at 90 to Sm Se Superior crush 225 to- per 24 hour from 3-m.^s^^^^^^^ ^^ ,^ 92 strokes ner minute ; fi-o^^i^^fnlreate percentage of slimes than careful crushing byAlthough the steam stamp makes a gieatei peicemag
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Fig. 8.—Steam stamp. rolK by its rapid and eoor.ous =lf-y jt TI;-,:.? t^Ho^^f ^XmaS^SSeamSr^aiySS t rlaS ;f,;os:%r!belJacon/a Mining^Co . at Anaconda. for amalgamation and lisi. atwn. The ™=^™° p.rftes, but stamps are never used^lVSSfUSre^;VoX:lxJe;tr^^^^^^^ .S re.crusMng n.iddliugs, unless tt ts OKE-CRUSHING MACHINES. 581 necessary to crush all the ore to the condition of meal or pulp. When ore is to be crushedto the size of fine sand only, even the best stamp-batteries are objectionable, because theyreduce by far the greatest proportion of the ore—frequently over 90 per cent.—to a muchfiner condition than is required. Some important improvements have been made in thewearing parts of stamps, particularly shoes, dies, and guides. Fraser & Chalmers stamp-shoes are cast of two kinds of iron at the same operation, by apatent process. The body of the shoe is made of white-iron of the hardest quality, while theneck, or stem, forming the upper part of the shoe, is made of iro

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