MUNTZ, George Frederick. — An improved "manufacture of metal plates for sheathing the bottoms of ships or other such vessels." The invention consists in making the "plates for sheathing of an alloy of zinc and copper, in such proportions and of such qualities as, while it enables the manufacturer to roll the said compound metal into plates or sheets fit for the said sheathing at a red heat, and thus makes the said plates or sheets less difficult to work, and consequently cheaper to manufacture, renders the said sheathing less liable to oxydation, and consequenly more durable than the ordinary copper sheathing now in use, though at the same time it oxydates sufficiently to keep the bottom of the vessel clean." "I take that quality of copper known in the trade by the appellation of 'best selected copper,' and that quality of zinc known in England as 'foreign zinc,' and melt them together in the usual manner, in any proportions between fifty per cent. of copper to fifty per cent. of zinc, and sixty-three per cent. copper to thirty-seven per cent. of zinc, both of which extremes and all intermediate proportions will roll at a red heat," but "I prefer the allow to consist of about sixty per cent. of copper to forty per cent. of zinc."
[Printed, 3d. No Drawings. See Repertory of Arts, vol. 15 (third series), p. 325, and vol. 17 (new series), p. 116; London Journal (Newton's), vol. 3 (conjoined series), p. 212, vol. 19 (conjoined series), p 460, vol. 21 (conjoined series), p. 468, and vol. 24 (conjoined series), pp. 297 and 299; Mechanics' Magazine, vol. 39, p. 367, and vol. 40, p. 111; Record of Patent Inventions, vol. 1, p. 339; Carrington and Kirwan's Reports, vol. 3, p. 297; Dowling and Lowndes' Reports, vol. 1, pp. 24 and 737; and Jurist, vol. 7, p. 121.]
Patents for Inventions. Abridgments of the Specifications Relating to Ship Building, Repairing, Sheathing, Launcing, &c.
Patent Office, London, 1862.
Transcribed by Lars Bruzelius.
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