Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 749
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 example, it is desired to open the valve… … 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 before. Theterminal expansion…
