Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 749
d to 30 or 40° past center instead of 20° as shown.A point to keep in mind is that it is impossible to changethe time a valve opens without changing the closing timecorrespondingly earlier or later, unless a new cam of dif-ferent design is used. This is indicated by A and B, Fig.303. If, for… … Tnlet Valve closes Fig. 804 If an engine is known to be properly timed and is to betaken apart it will save much trouble later, to see that thegears are marked as shown at C, Fig. 303, before takingthe machine to pieces. The gears can then be readilyreassembled and the timing will be just as…
