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Home > All Images > 1985 > September > 27 Sep 1985

Images Dated 27th September 1985

Choose from 6 pictures in our Images Dated 27th September 1985 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Tinted SEM of movement of Timex watch Featured 27 Sep 1985 Print

Tinted SEM of movement of Timex watch

False colour scanning electron micrograph (SEM) of the movement of an inexpensive watch (made by Timex) showing a close-up of the minute wheel & pinion (bottom) meshing with the hour wheel (top). These comprise part of the motion work of the watch, the train of reduction gears that display the time. A central wheel, connected to the teeth of the barrel (which houses the mainspring) turns once per hour. The no. of leaves & teeth in the minute/hour wheel reduction gives a ratio of 12:1, ie 12 revolutions of the centre wheel will display 12 hours. Magnification: x 8 at 35mm size. Original is bw print h100/164