Canadian Jewellers Association · Toronto : Maclean-Hunter Pub. Co · leaf 524
impulse wheel. Insection (498) we found that an escape wheel, although correctfor the wheel and roller action, might not be suitable for thewheel and pallet action, designed for the escapement. Theimpulse wheel may be larger or smaller than the old one was.In the former case, the finger will prove… … the length of the finger, and increase that in the same ratio.Set thedividers tothat distance, and with one point one mark thecurve u. Now lay off the angle of the small lilt, one half on eachside of line de, by the lines ew, ew, 1 Fig. 31,) and draw line </</ to the crossing of ew and the…
Jewelry · Jewelry trade
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
