. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. of the dynamometric apparatus prestnts no difficulty. The form shown inFigs. 1088 to 1090, has been carefully considered. In this, the downward pull delivered at K by thelever operates vertically on the middle of a flat horizontal steel spring S S, which is supported atboth ends ; and the spring is bo proportioned that its maximum deflection shall be about 1^ in 518 DYNAMOMETEE. Different springs would be required for engines if of widely different power. Immediately over thespring will stand a light frame
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. of the dynamometric apparatus prestnts no difficulty. The form shown inFigs. 1088 to 1090, has been carefully considered. In this, the downward pull delivered at K by thelever operates vertically on the middle of a flat horizontal steel spring S S, which is supported atboth ends ; and the spring is bo proportioned that its maximum deflection shall be about 1^ in 518 DYNAMOMETEE. Different springs would be required for engines if of widely different power. Immediately over thespring will stand a light framework, carrying two independent types of recording gear, both ofwhich will, however, be actuated by the upper end of one and the same feeler or sliding verticalrod I, Fig. 1089, which will convey to them the vertical elastication of the middle point of the spring,on which point its foot rests. Under one type the feeler will govern the position of an integrating wheel J, Fig. 1089, workingon the face of a rotating disc. The rotation of the disc will be made proportionate to that of the. screw shaft, being communicated by a telescopic universal jointed spindle L, Fig. 1087, which takesits motion from the shaft by bevel gearing. When there is no stress on the lever, and no deflectionof the spring, the integrating wheel will be adjusted to touch the disc at its centre, and thus willreceive no rotation, and its count will be zero, whatever be the speed of rotation of the disc. Whenthe spring is strained by the lever, the departure of the integrating wheel from the disc centre willbe proportioned to the strain, and its rotation and its count will be the product of the strain and therotation speed of the disc, or, in other words, the product of the moment impressed by the screwshaft on the casing and the speed of the screw shaft; that is, the work done by the shaft. With another type, the duty of the feeler I, Fig. 1089, is to actuate the horizontal arm of a lightbell crank M, the vert
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
