Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 839
atly affect its regularity. In order to effect this, various kinds of escape-ments have been devised. The vertical escapement is the oldest escapement of all which, after having first been adopted inclocks, was applied in the construction of watches. Its nature is explained by Fig. 3754, (a… … WATCHMAKING. 829 evidently from its resemblance to a crown: this same wheel, when employed in the watch, the latter to be plac< 1 on its face or back,) obviously i tically to the plane of the hi . made with ; ment are termed vertical Watches are still manul thi< principle, which hi . man…
Mechanical engineering
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