Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 654
s (see Pig. 269) by which one or more nozzles canbe cut out when the load is light. This renders it possibleto use steam at boiler pressure, no matter how small thevolume required for the load. This is a matter of greatimportance, especially where the load varies considerably,as, for instance,… … Fig. 272 642 Steam Engineering the number of nozzles in action may be reduced by closingthe shut-off valves until the required volume of steam isadmitted to the wheel. This adds to the economy of themachine. After passing through the nozzles, the steam,as elsewhere explained, is now completely…
