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25.6 3.35 17 28800 4 42 2804-2 [8] Mecaline hand 25.6 3.35 17 28800 4 42 2824-2 [9] Mecaline automatic 25.6 4.6 25 28800 4 38 2826-2 [10] Mecaline automatic 25.6 6.2 25 28800 4 38 2836-2 [11] Mecaline automatic 25.6 5.05 25 28800 4 38 2892-A2 [12] Mecaline Specialities automatic 25.6 3.6 21 28800 4 42 2893-1 [13] Mecaline Specialities automatic ...
A mechanical movement contains all the moving parts of a watch or clock except the hands, and in the case of pendulum clocks, the pendulum and driving weights. The movement is made of the following components: [2] Power source Either a mainspring, or a weight suspended from a cord wrapped around a pulley.
Balance wheel in a 1950s alarm clock, the Apollo, by Lux Mfg. Co. showing the balance spring (1) and regulator (2) Modern balance wheel in a watch movement A balance wheel , or balance , is the timekeeping device used in mechanical watches and small clocks , analogous to the pendulum in a pendulum clock .
3. A large aspect of the design of watch and clock movements is the minimisation of friction. Involute gear teeth often mesh with 2 to 3 points of contact at once. Cycloidal gears can be made so there are only 1 to 2 points of contact. Since there is always some friction at these meshing points, cycloidal profiles are preferred in horology ...
The earliest known example of a clockwork set-up is the Antikythera mechanism.This device functioned as a geared analogue computer after its creation during the first-century BCE timeframe, being somewhat astrolabe-like, and had been designed for calculating astronomical positions and particularly listing eclipses.
The dial of the W Model read Movement by Sessions. In the early 1950s Sessions begin to produce timers for television. In 1956, Sessions was absorbed by a company interested mainly in their timing devices. In 1959, William K. Sessions, grandson of William E. Sessions left the Sessions Clock Company and formed the New England Clock Company. In ...
The movement was manufactured by Audemars Piguet. A repeater is a complication in a mechanical watch or clock that chimes the hours and often minutes at the press of a button. There are many types of repeater, from the simple repeater which merely strikes the number of hours, to the minute repeater which chimes the time down to the minute ...
The Lavet-type stepping motors used in analog quartz clock movements which themselves are driven by a magnetic field (generated by the coil) can be affected by external (nearby) magnetism sources, and this may impact the rotor sprocket output. As a result, the mechanical output of analog quartz clock movements may temporarily stop, advance or ...