. Bulletin - United States National Museum. Science. r. .* z DILI !x2HTi Ifil&JS MffilTiTJB H7!ll. IIWHItl'ORATIIlAl' II. i-jki, In llu abwKll lV Uipm â¢! .1 ..Ipmrriivirirll .laiiH'«Huililiii»Ma> â H' â â >..,/* / ..///.-. /.;//.-,⢠Mm fl /HlH-it., />. ..,/. |«M<urilh, l|..' < ~|u i|i-nri,;nif/i)r///n'' I Figure 7.âPatrick Lyon's Diligent, 1820, as rebuilt by John Agnew in 1836. Lyon's engines employed vertical plunger pumps, located close to the central pivot of the levers. Lithograph published in 1852; pho
. Bulletin - United States National Museum. Science. r. .* z DILI !x2HTi Ifil&JS MffilTiTJB H7!ll. IIWHItl'ORATIIlAl' II. i-jki, In llu abwKll lV Uipm â¢! .1 ..Ipmrriivirirll .laiiH'«Huililiii»Ma> â H' â â >..,/* / ..///.-. /.;//.-,⢠Mm fl /HlH-it., />. ..,/. |«M<urilh, l|..' < ~|u i|i-nri,;nif/i)r///n'' I Figure 7.âPatrick Lyon's Diligent, 1820, as rebuilt by John Agnew in 1836. Lyon's engines employed vertical plunger pumps, located close to the central pivot of the levers. Lithograph published in 1852; photo courtesy of The H. V. Smith Museum of the Home Insurance Company, New York. the gates with common hand nippers. A long series of experiments were tried to get a fusible metal hard enough to stand the wear of dragging the hose over the stone pavements, and yet not too hard and brittle to rivet well. The first cast rivets were very badly proportioned, the heads being 9/16 inch diameter and 1/16 inch thick; the shanks of the rivets a di- ameter equal to No. 6 Birmingham wire gauge [less than 1/4 inch], the washers the same diameter and thickness as the rivet heads. As to the length of time that these cast rivets, and washers were used I am uncertain. My elder brother and myself of evenings and holidays cast and clipped from the gates many hundred-weight of them. Next in order came copper rivets and washers. These rivets were headed by hand. No. 8 copper wire was cut into lengths by a machine turned by hand crank, then headed in half dies closed by a lever pressing together spring jaws that carried the dies. This lever was operated by a foot treadle (the old English wrought nail header) and the head was struck by two regulated blows of a four-pound flat-faced hand hammer. The sheet copper for washers was cut into strips of a width that would admit of four or six washers being cut from them; this was fed by hand under two punches, a small one to punch the center riv
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
