Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 291
Fig. 213. The first spring governor using an initial tension of thesprings was patented by Chas. T. Porter in 1861. His claimwas for the idea of giving to the spring of a centrifugal gov-ernor an initial deflection of such amount that in every positionof the balls the radius of the circle described…
Mechanical engineering · Steam power plants
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