Shaft governors, centrifugal and inertia; simple methods for the adjustment of all classes of shaft governors . case, for reasons tobe made clear presently, but it can be diminished inall cases. C. The weight leverage is the distance from the centersof the pivots of the levers to the point where the wholeeffective weight of the levers and attached weights isassumed to be concentrated and which comes aboutcentral over the lever stops. D. The initial spring tension, is, as nearly as can bedetermined theoretically, the maximum tension thatcan be applied without racing, the Spring leverage,{B) bei
Shaft governors, centrifugal and inertia; simple methods for the adjustment of all classes of shaft governors . case, for reasons tobe made clear presently, but it can be diminished inall cases. C. The weight leverage is the distance from the centersof the pivots of the levers to the point where the wholeeffective weight of the levers and attached weights isassumed to be concentrated and which comes aboutcentral over the lever stops. D. The initial spring tension, is, as nearly as can bedetermined theoretically, the maximum tension thatcan be applied without racing, the Spring leverage,{B) being as given and the auxiliary springs applied 46 SHAFT GOVERNORS and properly adjusted. It is more than could becarried in the absence of the auxiliaries, unless withvery careful adjustment, and other conditions favor-able. (See 71 and 129.) E. The effective weight of a lever is the weight of anunweighted lever with spring clip in position to whichis added one-half of the weight of a link (B, Fig. 12).The weight is found by resting the lever on the scalesat the distance from the pivot given as the limit of. FIG. 13 the weight leverage (C) while the pivot is supportedindependently of the scales. (See Fig. 13.) F. The assumed diameter of the orbit of the weightsis an orbit somewhere within the range of movementof the levers, so chosen that its diameter will not con-tain inconvenient fractions of a foot, as it is assumedsolely for purposes of calculation. The diameter as-sumed is immaterial provided the next item (G) iscorrectly deduced from it. G. The resultant spring tension is the initial tension(D) augumented by the additional tension that wouldbe imposed on the spring by moving the levers out- THE BUCKEYE ENGINE GOVERNOR 47 ward till their centers of force reached the assumedorbit. (Neither this nor the initial tension can begiven exactly for all cases, as the latter depends some-what upon the position of the actual center of force,which varies in distance from the center of
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