. Rules and practice for adjusting watches . watches do, the proper point of attach-ment is on the left side of collet as shown at FFig. 10. 33. Results in Vertical Position Rates Due toChanging the Pinning Point. In either of the above instances the spring willdevelop upward as it leaves the collet. Thesepoints of attachment always produce a fast pendantup rate when compared to the opposite, or pendantdown rate, and all high grade watches are originallyfitted with springs conforming to this principle. If these points of attachment were changed to theopposite side of collet so that the spring
. Rules and practice for adjusting watches . watches do, the proper point of attach-ment is on the left side of collet as shown at FFig. 10. 33. Results in Vertical Position Rates Due toChanging the Pinning Point. In either of the above instances the spring willdevelop upward as it leaves the collet. Thesepoints of attachment always produce a fast pendantup rate when compared to the opposite, or pendantdown rate, and all high grade watches are originallyfitted with springs conforming to this principle. If these points of attachment were changed to theopposite side of collet so that the spring woulddevelop downward as shown at G Fig. 11, andH Fig. 12, the results would be reversed and thependant up rate would be slow in comparison to thependant down rate. This point of at-tachment in whichthe spring developsdownward from thecollet is generallyknown as the slowpoint among adjust-ers, and when aspring is pinned ateither the slow orfast point the pend-ant right and leftpositions generallycompare quite close-ly to each other in (46). Relative Pinning Points of the Hairspring timing, provided that the poise and other conditionsof the watch are correct. If the pinning point was changed to the inter-section of the collet and vertical line as shown in IFig. 13, the pendant up and down rates wouldcompare nearly equal to each other and the pendantright position would be slow compared to thependant left position. If it were pin-ned at the inter-section of the col-let and verticalline just oppositeto that shown inFig. 13, the pen-dant left positionwould be slowcompared to the*pendant right po-sition. The verticalpoints of attach-ment are seldom used, for the rea-son that the va-riation betweenthe pendant rightand left positionswould be verydifficult to controlwithin close lim-its, due to the ex-istence of the nat-ural error. Asthese positions,together with thependant up posi-tion are the mostimportant of the four vertical positions, they aregiven preference, and the natural erro
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