American School (Chicago, Ill.), Nelson, H. William (Hector William), b. 1869 · Chicago : The School · leaf 27
f lift when the harness is raised, and a loss in depression. To overcome these losses it is common to tighten the connections; but no matter how much they are tightened, there is never as good a shed as when the bowl and stud are in good condi- tion. rieasurements of 5hed. Before constructing a cam… … Fig. 59. Measurement of Shed. Length of treadle from pin A to point of connection of harness strap B, is 24 inches. Pin A to treadle bowl C, 1 5 inches ; required lift of the harness so as to give that space in the harness at D, 4 inches. Eule : To find length of stroke, multiply the distance…
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