Engineering reminiscences contributed to "Power" and "American machinist" (1908)
Porter, Charles T. (Charles Talbot), 1826-1910 · New York, J. Wiley · leaf 264
two heads, one of which isscrewed into the box and the other into the weight. The forcerequired to move the weight h is thus applied to it through thespring. The operation of this instrument is as follows: The cross-headbeing at its mid-stroke, as represented, has acquired its full velocity.At this… … Joseph Nason EXPLANATION OF THIS ACTION 205
