The pattern maker's assistant : embracing lathe work, branch work, core work, sweep work, and practical gear construction : the preparation and use of tools : together with a large collection of useful and valuable tables (1878)
Rose, Joshua · New York : D. Van Nostrand · leaf 99
PATTEEN MAIiEE'S ASSISTANT. 98 For a pattern to be molded liorizontally, Fig. 93 sliows the best style in which it can be made. Its diameters are … turned parallel j the required draft is given by making the rim of the flange a little thinner than at the hub, and by making the end faces cf the hub and the core prints slightly rounding. If the hub is very small — as, say, a lialf inch or less, and the flange does not much exceed it — the…
Patternmaking
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Halinitro-pyrobolia : Beschreibu[n]g einer newen Büchsenmeisterey, nemlichen, gründlicher Bericht wie der Salpeter, Schwefel, Kohlen vnnd das Pulfer zu praepariren, zu probieren, auch langwirrig gut zu behalten : das Fewrwerck zur Kurtzweil vnd Ernst zu laboriren, dann wie der Pöler, das grobe Geschütz vnd der Petardo zu gobernirn ... (1627)](https://img.insideoutlibrary.com/img/200/ia-halinitropyrobol00furt-191-1.webp)
