American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 202
rly placed(Fig. 1b). In this case, the diameter of theplate may be multiplied by 0.485, for attain-ing the diameter of the barrel. 26. The height of the barrel in a three-quarter plate movement ought to be the sumof the height of the pillars and the thicknessof the pillar plate, after subtracting… … 27. It will be easily understood that a watch, the escapement and depths of which I are imperfect, and made in a careless way, ! will require a powerful main-spring, while in ! a carefully made watch, the judicious utilizing 194 AMERICAN HOROLOGICAL JOURNAL. of space in the barrel will allow of…
Clocks and watches
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