File:Factory and industrial management (1891) (14781179172).jpg

Identifier: factoryindustria35newy (find matches)
Title: Factory and industrial management
Year: 1891 (1890s)
Authors:
Subjects: Engineering Factory management Industrial efficiency
Publisher: New York (etc.) McGraw-Hill (etc.)
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
ed. The ef-fect of the arrangementis said to be to increasethe pressure on the pis-tons gradually and to diminish slipping of the wheels in start-ing and risk of undue strains on the motion gear. For four-cylinder compound engines it is usual to admit steam auto-matically to the low-pressure cylinders during the first revolution ofthe wheels. This is done by means of the small pipe, shown in Figure30, connecting the lowest part of the throttle valve chamber with thelow-pressure cylinder valve chests. In these latter a simple deviceon the valve stem prevents the passage of this steam into the receiverexcept when the valves have full travel, as is only the case whenstarting. The cylinders of the four-cylinder engine now built and buildingin such large numbers for Italian railways differ from the cylinders y k F^ <!* Z f ^ 9 ■ ^^ -l P FIG. 30. ZAEA THREE-PHASE THROTTLECOMBINED WITH BYE-PASS. Flat valve fcr direct steam admission to low-pressurcylinders. EUROPEAN LOCOMOTIVE WORK. 713
Text Appearing After Image:
FIG. 32. MlLLliNG MACHINE FOR LARGE CYLINDERS.FIG. 31. ROUGH-BORING CYLINDERS ON NILES BORER. employed anywhere else in the world. There are four cylinders, butthe valves are only two in number just as usual in the most ordinarytwo-cylinder engine. Relatively to the number of cylinders, the Ital-ian arrangement is therefore simpler than engines which require onevalve for every cylinder. Here, one valve suffices for two. The en-gine is, effectively, a double two-cylinder compound—the cylinders

Note About Images