D The clutch is engaged by the bow spring beneath and released by the fork of R drawing down the clutch cone p wheel C to rotate idly on the seconds arbor S. To zero the seconds ha11d Y is pressed by the second button in the band of the case to lift E and release M to fall onto the zeroing earn on wheel C. When A is again pushed l i- lifted on to the ramp of R to disengage the clutch and tof the seconds hand but M remains locked on E. At the same moment zeroing le\'er Mis raised to rest on catch E. V\fl1en A is pushed by the button in 1 tl and of the case, 5 is turned one tootl1 to release le\ er l a1 d allol\T R to rise and engage the clutch carried on the ar r of the ~econds hand. s i11ustrateLi, le,rer Lis resting r.1n f c1utc11 le' er R to clisengage the clutch and tl ~ -011d_- hand. ri,1e tl1e seconliS rr1ed ( n th arb r of tl1e '' l1eel C, t ") sl1 I l1ttt l) ( \ ir1 (>11 lllt It II llll l'lllll.titllll)', I 1, r eel w t e left J:>y the >lope of t eraow the action enl ''g The diagrams below ,h '.th cams zero 1 ci hl. t 0 t the paw h )eft anu ra1>e the pntn h tchet tooth.the pillar wheel one toot so that it will J:>e P"' _.Further ' ~~: P~" 1,pnng ~~ at B to engage a ra h When rekase hed back t TI1c \\ork toutton in, the rainr trom the chronog he right, de>" n J, ,l\Ould ha\'c tlw priv1lebc oi m.1king my fir,t w.1tchca.,e under his guidance. i.111 work hop in Clerkenwl.'ll, agreed th,lt for a. of its manutacture from the raw m.11l'rial. mcnb of ,1 watch ,ind to karn thl' technique.equipped for work, tlw first w.111 h w,1 l.1id down on paper The following two )'l'. than fol111w pcbt l'>.amplc ,1nd pl'rH.'\'l'rt.' with the lathe 'I hw.ctt-d in the quality (lf work prodUl"l'd in thl' past on L>qu1prncnt that would tod.w be con.,idered l' 'trl.aw the ri.,e and fall of an induo try which hn,1lly l'ndt 1bility but it w.1s true tha! t~ad)ilf 111nph hed by the ex1w ril!110 t th1l for the mo:: t part, tlw purpo:: e W ir.d tr\' TM11't' C t truction and with th1.unild not -.uppnrt an antiquated :lu pr(l(. , t}!e nurd [d1h(1fl Preface, marke t for L'XPl'nsiv1. t a tem or transnutted 1n any ot the publishen> PREFACE TO THE THIH.D EDITIO. 1985 Rt:v c e )ork NY 1007-704 5 n hlli n"Wrvt"d No part of thia pqlllll.lll. JO f rst pubh htJ 1981 R pnn ed with dd1tionr.GEORGE DANIELS WATCHMAKING I ~dtti Philip \ ilson Publi hers Dan et 1981 li Steele JM, Stephenson FR, Morrison LV (1997) The accuracy of eclipse times measured by the Babylonians.Table of contents : WORKSHOP AND EQUIPMENT HAND TOOLS FINISHING STEEL AND BRASS TURNING WHEELS AND PINIONS MAKING SMALL COMPONENTS JEWELLING ESCAPEMENTS MAINSPRINGS AND ACCESSORIES MOVEMENT DESIGN THE BALANCE AND SPRING CASEMAKING ENGIME TURNED CASES AND DIALS Citation preview Steele JM, Stephenson FR (1998) Astronomical evidence for the accuracy of clocks in pre-Jesuit China. Matthes D, Sánchez-Barrios R (2017) Mechanical clocks and the advent of scientific astronomy. In: Grosholz E, Breger H (eds) The growth of mathematical knowledge. Mahoney MS (2000) Huygens and the pendulum: from device to mathematical relation. In: Bos HJM et al (eds) Studies on Christiaan Huygens.
Mahoney MS (1980) Christian Huygens: the measurement of time and of longitude at sea. Koyré A (1953) An Experiment in Measurement. University of Notre Dame Press, Notre Dame Giovanni Battista Riccioli and the science against Copernicus in the age of Galileo. Graney CM (2015) Setting aside all authority. The University of Chicago Press, ChicagoĮvans J (1998) The history and practice of ancient astronomy. Clocks and modern temporal orders (trans: Dunlap T). Springer, DordrechtĬohen IB (1940) Roemer and the first determination of the velocity of light (1676). Unveiling Galileo’s unorthodox path from a challenging problem to a new science.
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