Playtner, H. R. [from old catalog] · Chicago, Hazlitt & Walker · leaf 41
ule applies to the flat-faced pin and it is impor-tant that the right quantity be ground off. We find that3/7 is approximately the amount which should be groundaway. Fig. 22 illustrates the fork standing against thebank. The ruby pin touches the side of the slot but hasnot as yet begun to act; ri… … the side n of the slot we construct the right angle 0 n t; fromn, we transmit y* the width of the pin, and plant the centerx on the line n t. We can have the center of the pin slightlybelow this line, but in no case above it; but if we put itbelow, the pin will be thinner and therefore more…
Clocks and watches
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