. Off-hand sketches : a companion for the tourist and traveller over the Philadelphia, Pottsville, and Reading railroad . eavy and improvedmachinery. Wire as thick as an ordinary ram-rod is crimped by thisprocess, which merely consists of a heavy hammer, suspended inframe-work, which is made to fall upon the wire, placed undpr it,upon a surface allowing it to receive the particular bend desired, afterwhich it is woven into frames of about three feet square. Theseframes are then placed over a large wooden cylinder, and rounded,when two or more sections are pointed and riveted together, whichcom
. Off-hand sketches : a companion for the tourist and traveller over the Philadelphia, Pottsville, and Reading railroad . eavy and improvedmachinery. Wire as thick as an ordinary ram-rod is crimped by thisprocess, which merely consists of a heavy hammer, suspended inframe-work, which is made to fall upon the wire, placed undpr it,upon a surface allowing it to receive the particular bend desired, afterwhich it is woven into frames of about three feet square. Theseframes are then placed over a large wooden cylinder, and rounded,when two or more sections are pointed and riveted together, whichcompletes their circular form. The screen, thus complete, is removed ANTHRACITE COAL FORMATION. 191 from the bench, and joined with another of the same dimensions, bufcof larger or smaller net-work. These screens are remarkably dura-ble, and are not the least feature which has tended to bring coalBreakers into universal use. This process for crimping thick iron wire has introduced severalnew and important objects of manufacture, such as iron wire portablebedsteads, fences and ornamental railings, chairs, sofas, & FIG. 00.—IROX Walker & Son, at the corner of Sixth and Market streets, Philadel-phia, have a very extensive establishment exclusively devoted to theproduction of these articles, which, at no distant day, will supersedemost of the same articles now made of wood. After the coal leaves the screen and falls into its appropriateshutes, railroad cars are hauled immediately along side the openings,which, being raised up like the wickets in a mill dam, the coal fallsout into the car, and when a sufficient quantity is obtained, the shuteis closed, and then the coal leaves forever the scenes of its past his-tory, and is borne off to its future destiny. The size of chain generally used for hoisting coal is three-fourthsand seven-eighths of an inch; formerly smaller chains were used,and, in fact, smaller engines and lighter machinery ; but long expe-rience and heavy bil
Size: 2159px × 1157px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, bookidoffhandsketc, bookyear1854
