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Tachymeter scale on a Citizen watch bezel. A tachymeter (pronounced / t æ ˈ k ɪ m ə t ər /) is a scale sometimes inscribed around the rim of an analog watch with a chronograph.It can be used to conveniently compute the frequency in inverse-hours of an event of a known second-defined period, such as speed (distance over hours) based on travel time (distance over speed), or measure distance ...
Glycine was the first to feature a 24-hour rotating bezel in 1953 with the Airman No.1 pilot watch. The design became widely known when Rolex designed the Rolex GMT Master for Pan-Am pilots in 1954. A 24-hour watch with a compass card dial can be used to determine direction when set to local noon and used in conjunction with the Sun.
It is also possible for quartz clocks and watches to have their quartz crystal oscillate at a higher frequency than 32 768 (= 2 15) Hz (high frequency quartz movements [4]) and/or generate digital pulses more than once per second, to drive a stepping motor powered second hand at a higher power of 2 than once every second, [5] but the electric ...
In watch movements the wheels and other moving parts are mounted between two plates, which are held a small distance apart with pillars to make a rigid framework for the movement. One of these plates, the front plate just behind the face, is always circular, or the same shape and dimensions as the movement.
As the bezel only rotates counterclockwise, the dive time can only become "longer" in case of accidental bezel movement, averting the danger of spending too much time underwater. Perpetual rotor in the self-winding wristwatch mechanism, allowing the watch to run continuously, as every slight movement of the wrist winds the movement.
The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.
The term chronograph comes from the Greek χρονογράφος (khronográphos 'time recording'), from χρόνος (khrónos 'time') and γράφω (gráphō 'to write'). '). Early versions of the chronograph are the only ones that actually used any "writing": marking the dial with a small pen attached to the index so that the length of the pen mark would indicate how much time had
Bezel (jewellery), the rim which encompasses and fastens a jewel, watch crystal, lens or other object; Bezel, the sloping facets of the crown of a cut gem after gem cutting; Screen bezel, a space or frame around a display device, such as on a television or mobile device
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3180 Kingsdale Center, Columbus, OH · Directions · (614) 459-6494