Hood, Grant · Kansas City, Mo. : Kansas City Jeweler and Optician · leaf 188
into detail as much as with thelever escapement, but will explain more particularly thepoints that will be helpful in repairing any that come our way. The cylinder or horizontal escapement, as it is oftencalled, is a dead beat escapement, i. e., it has no recoil inunlocking. A tooth of the escape… … /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…
Clocks and watches
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-402-279.webp)
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