Engineering reminiscences contributed to "Power" and "American machinist" (1908)
Porter, Charles T. (Charles Talbot), 1826-1910 · New York, J. Wiley · leaf 253
as passing the dead center will also be observed. After this trial I made a careful comparison of the diagramstaken under the different loads with the friction diagrams, andfound the uniform results to be that the friction diagrams sub-tracted from the diagrams taken under the load left in each 196… … Diagram from Allen Engine, Fair of American Institute, 1870,cutting off at I stroke. From this I concluded that in these engines the use of thefriction brake is unnecessary; the friction is sensibly the sameunder all loads, and the friction diagram only needs to be sub- THE FAIR OF THE AMERICAN…
