A handle, if used, is joined to the lever by means of a brass plate 3/4
inch wide and a couple of inches long. A hole is bored in the centre
somewhat smaller than the knob to which the rubber was fastened, and joined
up to one long edge by a couple of saw cuts. Two holes for good-sized
screws must also be drilled and countersunk, and a socket for the knob must
be scooped out of the lever. After making screw holes in the proper
positions, pass the shank of the knob through the slot in the plate, and
screw the plate on the lever. This method holds the handle firmly while
allowing it to move freely.
The lever tapers from 1-1/2 inches at the pivot to 5/8 inch at the balance
end. The hole for the pivot--5/16-inch steel bar--should be long enough to
admit a piece of tubing fitting the bar, to diminish friction, and an
important point, be drilled near the handle edge of the lever, so as to
leave plenty of wood to take the strain. The last remark also applies to
the hole for the balance pin at Q.
The balance support, B, and the pivot piece, C, are 2-1/2 and 2-7/16
inches high respectively.
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