Pendulum Clocks and Their Errors . In the present model the electro-magnet, through a kind of remontoir,works a short lever E whose axis is parallel to, and some distance verticallyabove, the axis of suspension. This lever can assume either of the twopositions (E) or (E), and takes these positions very rapidly when the currentpasses. At each end of the lever very fine spiral springs, Fi, F2, descend andare connected below to the cross arm on the pendulum. The forces acting on the pendulum are shown in fig. 10 by the thickenedline. Here E and E are the distances of the pendulum from the vertica
Pendulum Clocks and Their Errors . In the present model the electro-magnet, through a kind of remontoir,works a short lever E whose axis is parallel to, and some distance verticallyabove, the axis of suspension. This lever can assume either of the twopositions (E) or (E), and takes these positions very rapidly when the currentpasses. At each end of the lever very fine spiral springs, Fi, F2, descend andare connected below to the cross arm on the pendulum. The forces acting on the pendulum are shown in fig. 10 by the thickenedline. Here E and E are the distances of the pendulum from the vertical at whichthe electric contacts are made. F and F are the changes of zero due to 1911.] Pendulum Clocks and their Errors, 519 change of the mean force exerted by the springs when the lever shifts fromone position to the other. B. In fig. 11 let Ox 0 ^^^ ^o> i -Po then Letthen FPiF =Hence Fia. rPi = %, FTi = FT2 = a2, PoFPi = <^i, P1FP2 OE = OE = A and OF = OF = e, 2e^/{a^—IiP)/a and <X2 = ai + 2eh/a2 = aQ-^Aeh/a, = <^ 2j- a. TV a^—e, = a^-^IelijaQ
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Keywords: ., bookaut, bookcentury1900, bookdecade1910, bookidphiltrans05341850
