. Watch and clock escapements; . well. Pallet jewels had to bemade, and lapidists have usually poor ideas of close measure-ments. Present-day conditions, however, will, no doubt, enablethe workman to follow our instructions much more readily. MAKING THE BRIDGES. In case the reader makes the bridges C and E, as shown inFig. 27, he should locate small circles on them to indicate theposition of the screws for securing these bridges to the pillars whichsupport them, and also other small circles to indicate the position ofthe pivot holes d b for the escape wheel and pallet staff. In practiceit will
. Watch and clock escapements; . well. Pallet jewels had to bemade, and lapidists have usually poor ideas of close measure-ments. Present-day conditions, however, will, no doubt, enablethe workman to follow our instructions much more readily. MAKING THE BRIDGES. In case the reader makes the bridges C and E, as shown inFig. 27, he should locate small circles on them to indicate theposition of the screws for securing these bridges to the pillars whichsupport them, and also other small circles to indicate the position ofthe pivot 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 in the bridge F. These holes should beabout Iy in diameter. The same sized hole is also drilled in themain plate A at d. We now place a nicely-fitting steel pin in the The Detached Lever Escapement. 43. 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 will insure the escapewheel and pallet staff being perfectlyupright. The same course pursuedwith the plate C will insure the balancebeing upright. The pillars which sup-port the bridges are shaped as shownat Fig. 28, which shows a side view ofthe pillars which support the top plate or bridge C. The ends are turned to )£ indiameter and extend half through the plate, where theyare held by screws, the same as in American pillars (like H) can be riveted in the lowerr plate A, but we think most workmen will find it moresatisfactory to employ screws, as shown atFig. 29. The heads of such screws shouldbe about y& in diameter and nicely rounded, polish
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