The design-study of a 10 , high-duty, stationary gas engine . ^/o. e. DESIGIT OF A 10 GAS EIIGISE. 58, the lovirer arm of the bell crarik operates theexhaust-valve, roeker arm, and a similar rol-ler on the upper arm of the hell crank opera-tes the inlet-valve, roeker arm. As 7:as originally planned, the overheadcamrshaft type of valve hear was finally de-cided upon and designed to meet the peculiarrequirements of this engine. The spur gearsdrivin-r the jack shaft were made 5 inches and10 inches in pitch diameter, respectively,with a diametral vitch of 6 and width of faceof 1-1/8 inche
The design-study of a 10 , high-duty, stationary gas engine . ^/o. e. DESIGIT OF A 10 GAS EIIGISE. 58, the lovirer arm of the bell crarik operates theexhaust-valve, roeker arm, and a similar rol-ler on the upper arm of the hell crank opera-tes the inlet-valve, roeker arm. As 7:as originally planned, the overheadcamrshaft type of valve hear was finally de-cided upon and designed to meet the peculiarrequirements of this engine. The spur gearsdrivin-r the jack shaft were made 5 inches and10 inches in pitch diameter, respectively,with a diametral vitch of 6 and width of faceof 1-1/8 inches. They were at first placed in-side of the bearing as shown in sketch. Fig,7 ; but because of their inaccessibility and the trouble in providing a proper and suffi-cient bearing for the jack shaft, it was deci-ded to place these gears between the bearingof the crank shaft and the flwheel. Thejack shaft was placed at a distance below thecenter-line of the cylinder such that the hor-izontal center!ine of the lay shaft coincided DESi:?.IJ OP A 10 ?AS SUGIKE. 40, with the horizontal center-line of the cylin-der. The spiral gears were made 4 inches pitchdiameter with a 1- inch face. The bevel gearswere made 4 inches pitch diameter, 8 diametralpitch, with a 1-inch face. In designing the rocker arms and brackets,considerable difficulty was encountered in se-curing the proper location of parts. Properlength of Yalve stem for the springs was firstsecured; and then the rocker arms were drawnin at right angles to the valve stems. Thelift of the valves, the size of rollers on therocker arms, the diameter of the cam shaft andthe size of the cams were all determining fac-tors in the location of the cam shaft. A single-piece bracket was used for thecam-shaft and rocker-arm bearings. Althoughthis casting is complicated and requires con-siderable machine work, it was thought advis-able to make it in one piece to secure rigidityand to maintain alignment and proper valve-timing.
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookiddesignstudyof10h00ploc
