American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 135
ere is not the first process ofpolishing applied to effect the result. Thewhole point consists in the condition of thecutting edges of the tools used in cuttingaway the superfluous metal from the setting.There have been many devices for theshapes, and many more to render polishingpossible, but it… … We will suppose that we take a commonsteel graver, Stubbs, and on grindingoff the point at the angle 1, 2, 3, say 30°,being careful to leave the plane representedbetween A and B perfectly level, we may pro-ceed to finish the two edges, A and B, up toa point that shall be equal to the finish we…
Clocks and watches
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