Practical Clock Repairing by Donald De Carle

Author:Donald De Carle
Language: eng
Format: epub
Publisher: Crowood

Fig. 230. Dimensions of the escape pinion.

Fig. 231. Details of the escape wheel.

Fig. 232. Escape wheel collet.

Fig. 233. The escape wheel and pinion completed.

Fig. 234. Dimensions of the back cock.

The pallet cock—or more correctly the back cock—is filed up from a casting, but if it is not possible to obtain a casting it must be cut from a solid block. If a casting is obtainable, as many of the flat surfaces as possible—such as the two feet of the cock and the suspension block—are hammered on a steel stake, held in the vice. Brass castings are inclined to be porous, and hammering makes the metal more homogeneous and hard. Whether the cock is made from a casting or a block, it is filed to the dimensions and shape as shown in Fig. 234.

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