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 71
st be remembered and carried intoactual practice. 241. The Corner Test in Practice—Elgin Type.—To obtainaccurate information by the corner test requires that the escape-ment be banked to drop. The routine of testing the corner free-dom is as follows: A—Bank the escapement to drop and revolve the… … Fig. 27 from its bank. This causes the slot corner to come into contactwith the roller jewel, as shown in Fig. 27. D—The extent we are able to lift the lever away from itsbank shows the extent of the corner freedom. E—Make a test on the opposite slot corner. If conditions arecorrect the corner…
Clocks and watches
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