. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ^ 2o /s /e Fig. 3. 26 RAILWAY AND LOCOMOTIVE ENGINEERING January, 1921 to the axis as shown in Fig. 3, and markit 0 or 36. Then turn the hub through 10° andmake a similar mark which should bemarked 1. Then turn 10° consecutivelyand make a similar line for each settingwhich should be marked 2, 3, 4, etc., untila complete revolution has been made. When this has been done the hub isready for the laying out of the worm. To do this, first take the diagram of thepitch for the first turn of the worm
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ^ 2o /s /e Fig. 3. 26 RAILWAY AND LOCOMOTIVE ENGINEERING January, 1921 to the axis as shown in Fig. 3, and markit 0 or 36. Then turn the hub through 10° andmake a similar mark which should bemarked 1. Then turn 10° consecutivelyand make a similar line for each settingwhich should be marked 2, 3, 4, etc., untila complete revolution has been made. When this has been done the hub isready for the laying out of the worm. To do this, first take the diagram of thepitch for the first turn of the worm, wherethe pitch increases from 10 in. to 10^in., and set the dividers to the length of theline marked 10°, using the distance fromthe base to the upper or patternmakers line, and lay off this distance on the line 1from the line A, as indicated on Fig. 3at 1. Then set the dividers to the lengthof the corresponding vertical line 20° andlay it off on the line 2, and so continueuntil the length of the line at 360° has beenmarked on 0 or 36. One complete turnof the worm will then have been laid take the di
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Keywords: ., bookcentury1900, bookdecade1900, bookidrailwaylocom, bookyear1901
