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 69
Practice—Elgin Type.—Beginnersexperimenting with this test are advised to bank every escapementto drop; accuracy is thereby attained. Assuming we have anescapement before us, the routine of testing the extent of theguard freedom is as follows: A—The escapement being banked to drop, revolve the… … Fig. 24 lever away from its bank. This brings the guard-pin in contactwith the edge of the roller (Fig. 25). D—The extent the lever can be lifted off its bank representsthe freedom of the guard-pin from the edge of the roller. CorC^
Clocks and watches
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