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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 266

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 266
193 T'o find the template for a given Short Egg -end Spherical. Figure 68 is supposed to represent the egg-end, the plates for forming the same are to be over-lap jointed, the breadth of each plate to bear an equal portion of the whole circumference, saj \ part. Fig. 68. Fi«. 70. … Fig. 69. The method as laid down in the figures will be very easily understood from the following observa- tions. Suppose the greatest diameter of egg-end to equal 3 feet 111 inches, this divided by 2, gives 1 foot llf inches for radius. The circumference equals 12 feet 4:f inches, divided by 6…

Sheet-metal work

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

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