Hand book of calculations for engineers and firemen : Relating to the steam engine, the steam boiler, pumps, shafting, etc. . 266 Hand Book of Calculations, GOVERNORS. Many advantages are found to attend the use of high-speedgovernors. They are more sensitive to alterations in speed, theparts may be made lighter and move with less friction. Inorder, however, to prevent the balls from flying out too far, inconsequence of the increased speed of rotation, a weight, orelse a spring is so arranged as to act on the ball arms in such amanner as to develope a radial force in the contrary directionto t
Hand book of calculations for engineers and firemen : Relating to the steam engine, the steam boiler, pumps, shafting, etc. . 266 Hand Book of Calculations, GOVERNORS. Many advantages are found to attend the use of high-speedgovernors. They are more sensitive to alterations in speed, theparts may be made lighter and move with less friction. Inorder, however, to prevent the balls from flying out too far, inconsequence of the increased speed of rotation, a weight, orelse a spring is so arranged as to act on the ball arms in such amanner as to develope a radial force in the contrary directionto the line of action of the centrifugal force. Fig. 126 shows a loaded high-speed gover-. /l\ D nor. Each ball is attachedto two sets of links. Theweight is arranged to slideon the central spindle, andtb presses directly upon thelower pair of ball links. The forms of governorsare so numerous that it hasbeen impossible here to domore than explain the prin-ciples upon which they act. Fig. 126. Locomotive engines arenever fitted with governors,but in marine engines they are very necessary, as racing mayensue whenever the propeller is partially out of water, or when-ever the propeller or crank shaft may give way. On account ofthe motion on board ship, the forms of governors used on landengines could not be employed for marine purposes. Marinegovernors are of two principal sorts, viz. those that are actuatedby variations in the water pressure at the stern of the ship, andthose which depend for their motion on variations in the velocityof the engine. The former class only provide for cases due tothe incomplete immersion of the propeller, but the latter willguard against every co
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