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 73
ed bygrooving, the ends being screwed to the sides. This 62 PRINCIPLES OF PATTERN MAKING. framing is dowelled upon a bottom board E. Thevalve facing F is nailed upon E, and the prints G Gfor the steam passage cores, and H for the exhaustcore are nailed upon F. The side facings or guidesJ J for the… … Fig. 47. Core Box foi Steam Passage. fit into the impressions made by the prints G G inFig. 46. The box is made in two pieces, dowelledtogether. The facings A A afford allowance for filingor machining out the ports for accurate cut off of thesteam. The piece B forms that end of the core whichjaas…
Patternmaking
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