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When hand setting a clock, manually moving the hour or seconds hand rather than the minute hand to set the time can be damaging, as can be counterclockwise hand turning. [8] Moving the minute hand ahead on a clock by several hours when setting the time can also lead to clockwork damage.
'12:14' in both analog and digital representations. In the analog clock, the minute hand is on "14" minutes, and the hour hand is moving from "12" to "1" – this indicates a time of 12:14. A ship's radio room wall clock during the age of wireless telegraphy showing '10:09' and 36 seconds'. The green and red shaded areas denote 3 minute periods ...
A method to solve such problems is to consider the rate of change of the angle in degrees per minute. The hour hand of a normal 12-hour analogue clock turns 360° in 12 hours (720 minutes) or 0.5° per minute. The minute hand rotates through 360° in 60 minutes or 6° per minute. [1]
The anchor increased the accuracy of clocks so much that around 1680–1690 the use of the minute hand, formerly the exception in clocks, became the rule. [10] The anchor escapement replaced the verge in pendulum clocks within about fifty years, although French clockmakers continued to use verges until about 1800.
The first longcase clocks, like all clocks prior to the anchor escapement, had only one hand; an hour hand. The increased accuracy made possible by the anchor motivated the addition of the minute hand to clock faces in the next few decades. Between 1680 and 1800, the average price of a grandfather clock in England remained steady at £1 10s.
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