Practical lessons on the lever escapement, its tests, errors, their detection and correction (1916)
Wilkinson, T. J. (Thomas Jessop), b. 1864 · Philadelphia, Penna., Technical publishing company · leaf 10
les by the line of the escape wheel. 29. Straight-Line Escapement.—A straight-line escapementis one wherein we find the pallets, lever and balance all plantedin a straight line. ESCAPE WHEEL 30. Club Tooth Wheel.—This term describes the shape ofan escape wheel tooth as used in American watches. 31.… … 33. Pitch of Tooths Locking Face.—The angle found on theback of each tooth. (See Fig. 1, B to C.) 6 34. Tooths Impulse Face.—See Lift on Tooth. 35. Heel of Tooth.—In the illustration Fig. 1 the point A isthe heel. 36. Toe of Tooth.—The point B (Fig. 1) is the toe of thetooth. LOCK 37. Locking.—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-84-59.webp)
