GB103121A - - Google Patents

Abstract

103,121. Wuthrich, E. Dec 31, 1915, [Convention date]. Watch movements.-The going-barrel 3 is larger than usual, and the second wheel 4 is not in the centre of the plate, but has a cannon-arbor holding the arbor 25 of a supplementary wheel 24 which drives the hands. The fourth wheel gears with a centre wheel 7, the arbor of which passes through the pipe of the central minute-wheel and carries the seconds-hand. Driving-mechanism, mainspring.-The barrel 3 is not supported by a bridge, but turns on a pipe 31<1>, which is fixed on the plate 5 and forms the bearing for the barrel arbor 1. According to Fig. 4, the mainspring 2 is attached to a thickened part of the barrel arbor; according to Fig. 6, it is attached to a socket 35 which is integral with the barrel cover 33. In the first case, the barrel arbor is kept in place by a winding-wheel 30 on the dial side of the plate ; in the second case, it is retained only by a nut 34. This nut may be replaced by a pivoted key 38, Fig. 7, allowing the arbor, cover, mainspring, and barrel to be removed without disturbing the mechanism on the dial side. Keyless mechanism.-The barrel arbor 1, Fig. 4, carries a wheel 30 which is in train with the wheel on the winding-stem 17 above the sliding clutch and crown-wheel 16, Fig. 3. The barrel cover 33, Figs. 5 and 6, is toothed, and a single intermediate wheel 36 connects it with the wheel on the winding-stem. A click 26 engaging the intermediate wheel prevents reversal. The lever 15, Fig, 3, which shifts the sliding clutch on the winding-stem carries a wheel 19 to gear with a pinion 21, which passes through the plate and carries a wheel engaging the wheel 9.