File:A general description of the methods and processes involved in the manufacture of brass goods (1907) (14597002720).jpg

Identifier: generaldescripti00gree (find matches)
Title: A general description of the methods and processes involved in the manufacture of brass goods
Year: 1907 (1900s)
Authors: Greenman, Edwin Gardner
Subjects: Brass industry and trade Brass industry and trade Brass industry and trade Theses
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Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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be turned after the lower screw isput in. The assem.bling is now completed by putting on the Dwasher and the lower screw. After assembling they are sent tothe test where they are tested on air pressure at about fiftypounds. A nuiber of cocks are screwed on a header and it is thenlet down into a tub of water until the keys are immersed. If noair bubbles appear they are passed on to the buffers who polishthe T handle first and then buff the entire outside ready forstock. Those V^e.t leak on the air test are sent back to be re-ground. Gasoline is a little more difficult to hold than aireven but a little grease pat on the key will m.ake the cock per-fectly tight even for gasoline. A slight coating of lead on theoutside of the keys is also effective in keeping the keys tightin difficult places. Packed key and stoD cocks are tested onwater the same as globe valves. -47- Lei^GK- Mai. Iron F\c^. 3cr: LocHnut/Toe/. £>f=i£i3S> Top Outlet ^ell LocKnuta — F\od £>r<a^ Outlet /SeZZ
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BrAao Po p Va L_vE -48- Pop Valvo and Injector Departnents. The work so far described in different departments is of acharacter t^>at can bo done by boys or inexperienced Inborers, forif necessary the subforeman can set un the nac^^ine and the operatormerely inserts a piece and performs one operation after anotherv/ithout the use of any judgment, but pop valve o^nd injector workrequires men of som.e experience, at least in the f inishing of thev/orking parts and in assem.bling. Some of the work is pieceworkbut the more difficult parts are not. Special tools and gaugesare provided for pop valves so as to m.ake all the pieces as nearlyexactly alike as possible but a certain amount of fitting is oftennecessary to get the valve to work properly, A good many popvalve trimmings are m.ade of rod brass and others are made in cyl-inders eight to twelve inches long and the pieces cut off theproper length. Regulating rings for instance, see cut page 47,are made thus. The disc is one of the pi

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