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The Sheet metal worker's instructor : for zinc, sheet iron, copper, and tin plate workers, and others, containing a selection of geometrical problems, also practical and simple rules for describing the various patterns required in the different branches of the above trades (1906)

Warn, Reuben Henry · Philadelphia : Henry Carey Baird & Co. · leaf 247

An illustration from The Sheet metal worker's instructor : for zinc, sheet iron, copper, and tin plate workers, and others, containing a selection of geometrical problems, also practical and simple rules for describing the various patterns required in the different branches of the above trades, 1906, leaf 247
174 The result is the angle with the sloping side^ as c E makes with the centre line c D. In the example there are two parts in the radius b EBt^l six in the length of side, which gives the Fig. 54. G … angle,E C D, of 60°. From C, with a chord of 60°, describe the arc e f and set off 60° from the same scale of chords from E to D ; draw c D and

Sheet-metal work

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

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