Kleinlein, Walter John, 1876- [from old catalog] · [Boston, Hooper printing co.] · leaf 61
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… … 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…
Clocks and watches
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