Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 299
28S HOROLOGICAL. … 1169. DOUBLE TRI-TOOTH PENDU-LUM ESCAPEMENT with fly regulator.The alternate teeth of the escapement lock onopposite sides of the pallet frame. The im-pulse is given by the small triangular arborstriking the curved pallets. 1170. BLOXAMS GRAVITY ESCAPE-MENT.—The pallets receive an impulse from…
Mechanical movements
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