Hood, Grant · Kansas City, Mo. : Kansas City Jeweler and Optician · leaf 189
/c: Fig. I. consequently it is very brittle and easily broken as the shellis only tempered to a straw color; it is on account of theirhardness that they are so easily broken. To better illustrate the shape of the acting part of thecylinder, reference is made to Fig. 1. A represents the cen- 181… … 182 THE CYLINDER ESCAPEMENT. ter of the pivots on which it rotates. B the receiving lipand C the let off lip of the cylinder. The drawing is a crosssection, and is a trifle more than half of a circle, as shownby the dotted line it embraces an angle of about 196°. Theshell is very thin, and we find…
Clocks and watches
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