American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 262
s asthe chuck is drawn in, because the angle of theinner surface of the female cone remains con-stant, while the angle of the male changes withevery change in the aperture of the jaws. In Fig. 3, the relations of the two cone sur-faces are as diverse as in the previous figure,but in the opposite… … at the moment the jaws close, they coincide ;and if the condition of the chuck permitted afarther inward retreat the relation of the twoangles would then commence to assume theform represented at Fig. 2. There can be no doubt but that the proper re-lation between the male and female is as shownby…
Clocks and watches
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