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Metal-plate work : its patterns and their geometry, also, notes on metals, and rules in mensuration for the use of tin, iron, and zinc plate workers, coppersmiths, boiler-makers, and others (1887)

Millis, C. T. (Charles Thomas) · London ; New York : E. & F.N. Spon · leaf 39

An illustration from Metal-plate work : its patterns and their geometry, also, notes on metals, and rules in mensuration for the use of tin, iron, and zinc plate workers, coppersmiths, boiler-makers, and others, 1887, leaf 39
28 METAL-PLATE WORK. CHAPTER IV. , Patterns for Eound Articles op Equal Taper or Inclination op Slant. (Class I. Subdivision a.) (8.) If a cone has its inclined or slanting surface painted, say, white, and be rolled while wet on a plane so that every portion of the surface in succession touches the… … will be the pattern for the cone. As the cone rolls (the figure represents the cone as rolling), the portion of it touching the plane at any instant is a slant of the cone (see § 7). (9.) Examining the figure formed by the wet paint, we find it to be a sector of a circle, that is, the figure…

Plating · Metallurgy

Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.

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