The principles of pattern making, written specially for apprentices and students in technical schools (1900)
Horner, Joseph Gregory, 1847-1927 · London, New York, Pitman · leaf 112
n each case it is essential that the correctradius be obtained. In loam work the central bar isof a definite size,—2£, or 2£, and one-half of this isdeducted from the length A of the board, Fig. 76, sothat its working length is equal to the radius B, minusIf in the first case, or I5- in the second.… … Fig. 76. Striking Board for Loam. inaccuracy in the mould to the extent of from an \ to|. Besides this, there is such a thing as inaccuratecutting, and levelling of the board. For these reasons 7—(51 oy^ 98 PRINCIPLES OB1 PATTERN MAKING. the diameters of the mould itself are properly checkedby…
Patternmaking
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