Canadian Jewellers Association · Toronto : Maclean-Hunter Pub. Co · leaf 286
about ,,, etc.These figures are only approximately correct, but are asnear as will be got by measurement of the parts. All things( onsidered, a roller slightly too large is preferable to the reverse,as a deficiency of motion is better than too large vibrations,which from the effects of riding, and… … Fig to mainspring, if too large stiffen it, either by changing the springor by altering the stop works to give a different amount of keyingup. The workman will now perceive the necessityof care in selecting a roller jewel, and the effect ol having one-loo large or too small, as well as how to meet…
Jewelry · Jewelry trade
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
