FIG 9
The quadrant ([Fig. 9]) is of brass, and will have to be finished up with a file and emery, and the holes A B B drilled through. The shaft ought to be turned up in the lathe as well as the fly-wheel and coupler, with a slight groove sunk in where the plummer blocks support it, so as to take the thrust.
FIG 10
The reversing quadrant with the lever attached I have shown at [Fig. 10]. It is best cut out of brass. The notches are cut with a small file after the two pieces have been brazed together with a small piece an eighth of an inch thick between either end. It is then screwed on to the slide-valve case.
FIG 11
The lever is drilled at A, B, and C with small holes, and can be made of flat steel wire; A is for a pin to work into a joint or hinge on bed-plate. B is attached to the hole A ([Fig. 9]) by a small length of brass rod, so as to work easily. Cut with a slot at each end and then drill like [Fig. 11].
The small spring D ([Fig. 10]) is to keep the ratchet down in place, and is best made from a watch-spring, and the handle F is turned out of some brass wire.
The different-size drills you will require can be easily made from various steel knitting-needles warmed, filed up to shape, and then tempered to a light-straw colour.