holes d b for the escape wheel and pallet staff. In practiceit will be well to draw the line a a through the center of the mainplate A, as previously directed, and also establish the point d astherein directed. The pivot hole d for the escape wheel, and also the holes at e eand b, are now drilled… … hole a in the bridge F and let it extend into the hole d in themain plate. We clamp the bridge F to A so the hole b comescentral on the line a, and using the holes e e in F as guides, drill ormark the corresponding holes e e andb in the main plate for the pillars E Eand the pallet staff. This plan…
Clocks and watches
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