American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 133
y short, its in-terior being cut away so as to bring the pres-sure upon the chucks at the very outer end, asnear as possible to the article to be held, asshown at cZ, Fig. 1. This gives great firmness tothe grasp of the chuck, and tends to preventany untruth in the grasp. The chuck pin, f,Fig. 1,… … very short, and have a bearing at the rear orinner end, e, Fig. 1, which insures their beingin line with the centre of the spindle. Infavor of the short chucks this advantage isclaimed—that the long chuck is easily sprungout of truth, and especially is this the case if apiece is held by the extreme…
Clocks and watches
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