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 43
Fig. 169. Cerrect Lift.—The drawings (Fig. 15) A, B and C in-dicate the average relative positions of a tooth as it passes overthe impulse face of the receiving pallet. The drawings (Fig. 16) … D, E and F show the average relative positions of a tooth as ittravels over the discharging pallets impulse face. 39 170. Incorrect Lift.—Not infrequently we encounter liftingactions of an irregular nature, such, for instance, as illustratedin Fig. 17. This drawing shows that the pallet acts on the…
Clocks and watches
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