. Automotive industries . ocket,due to the gradual lengthening which occurs, because ofthe slight wear in the joints. Where the design of thechain is such that gravity tends to draw both fans ofthe chain away from the crankshaft sprockets and thecontact is less than 130 deg., the chain is apt to jump andthrow the engine out of time. Shoes on the case are pro-vided in some installations to cause noise when the chainbecomes loose enough to be apt to jump. This warnsthe operator and makes him adjust the chain and takeup the slack before it can jump from the sprocket. The layout of sprocket center
. Automotive industries . ocket,due to the gradual lengthening which occurs, because ofthe slight wear in the joints. Where the design of thechain is such that gravity tends to draw both fans ofthe chain away from the crankshaft sprockets and thecontact is less than 130 deg., the chain is apt to jump andthrow the engine out of time. Shoes on the case are pro-vided in some installations to cause noise when the chainbecomes loose enough to be apt to jump. This warnsthe operator and makes him adjust the chain and takeup the slack before it can jump from the sprocket. The layout of sprocket centers is, of course, of primaryimportance in designing a chain drive. In designing tri-angular layouts on new engines, it is highly desirable thata chain specialist be consulted before a center distance isadopted, and engineers should consult with the chainmakers and allow their engineering departments to assiston the original layout, in order to secure the best results. Installations of the Link Belt chain show some particu-. larly interesting features of front end drive practice. Oneof the features in connection with some of the Link Beltinstallations is the highly successful use of the automaticidler as employed on the Mercer and Brewster cars. Thefeature of the automatic idler for taking up wear inchains as used on the engine is not new, but heretoforehas proven unsuccessful because there was a certain pointin the speed of an engine where the automatic idler had atendency to vibrate excessively, causing considerable automatic idler, as arranged by the Link Belt Co., isclaimed to absolutely be free from vibration at any speeds. The Link Belt Company has recently placed on the mar-ket a new type of front end drive chain, which has takenabout 10 yr. to develop. This chain is known as the unitchain, because in it the liner type of bushings used in allprevious types of Link Belt silent chains have been elimi-nated. This has also eliminated two points of wear at eacharticul
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
