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 517
he engine were as follows: bore ofcylinder, 32 in.; stroke, 5 ft. At the time Fig. 188 wastaken the engine was making 62 E. P. M. and the boilerpressure was only 50 pounds. A 30 spring was used.Although the load on the engine was very light at the time, 504 Steam Engineering yet the diagram served… … Fig. 1S9 made of it, as will be seen by referring to Fig. 189. Thereducing motion was a pantograph, and as it is very easyto vary the travel of the paper drum with this motion,diagrams of different lengths were taken until the one which
