American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 55
othe jaws of the bench vice. The centres in onejaw can then be used to carry an arbor with abrass pulley on one end for the drill bow. Onthis arbor you can fasten, or slip on pinch tight,a metal grinding disk, or what is perhaps abetter arrangement, you can use the ordinaryscrew arbor, and fit to… … that the pressure shall keep the arbor in placeand yet allow the yoke centres and arbor freelateral motion as a whole. The pinion, orwhatever else to be operated upon, is placedbetween the other pair of centres in the tool,and the proper depth obtained by the adjustingscrew, and then the polisher…
Clocks and watches
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