strength and form, two treadle and the parallel sides of the neck prevent any levers are alternately depressed to rock a shaft car- rotation in the side plates. rying asegment rack meshing with a pinion on a short If it went no further than this, the chain shaft which also carries a large gear… … tudinal channel, is movable a strip of steel marked off cut out ss inch deep at A, so that turning all the pins in inches for the greater portion of its length, the inner in a 52 inch chain would reduce its length a little over end portion only being marked for the fractions of an three inches. To…
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