Five hundred and seven mechanical movements (1903)
Brown, Henry T. [from old catalog] · New York, Brown & Seward · leaf 81
311 ¥mm^m\ … Mechanical Movements. 77 306. Three-legged pendulum escapement.The pallets are formed in an opening in aplate attached to the pendulum, and thethree teeth of the escape-wheel operate onthe upper and lower pallets alternately.One tooth is shown in operation on theupper pallet. 307. A modification of…
Mechanical movements
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