American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 287
isthereby produced. The amount of recoil isdetermined by the different positions thepoints E and J may occupy. These pointscan only be determined by some obtusetrigonometrical calculations, which we deemto be inexpedient to introduce here. In themeantime it may be an incentive to some ofour young… … or the pin-wheel escapement, as it wasoriginally made. The wheel had 60 pins seton its sides, 30 on each side, and the pallet-arms were placed a short distance apart, andthe wheel worked between them. I and Lare the acting faces of the pallets, which area true circle, the centre of which is F. The…
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-309-202.webp)
