Editing Clock (section)

===Hairspring===
In 1675, Huygens and [[Robert Hooke]] invented the [[spiral balance|spiral balance spring]], or the hairspring, designed to control the oscillating speed of the [[balance wheel]]. This crucial advance finally made accurate pocket watches possible. The great English clockmaker [[Thomas Tompion]], was one of the first to use this mechanism successfully in his [[pocket watch]]es, and he adopted the minute hand which, after a variety of designs were trialled, eventually stabilised into the modern-day configuration.<ref>{{cite web|title=History Of Clocks|url=http://www.historyworld.net/wrldhis/PlainTextHistories.asp?groupid=2324&HistoryID=ac08&gtrack=pthc|access-date=December 6, 2013|archive-date=December 10, 2013|archive-url=https://web.archive.org/web/20131210183625/http://www.historyworld.net/wrldhis/PlainTextHistories.asp?groupid=2324&HistoryID=ac08&gtrack=pthc|url-status=live}}</ref> The rack and snail striking mechanism for [[striking clock]]s, was introduced during the 17th century and had distinct advantages over the 'countwheel' (or 'locking plate') mechanism. During the 20th century there was a common misconception that [[Edward Barlow (priest)|Edward Barlow]] invented ''[[rack and snail]]'' striking. In fact, his invention was connected with a repeating mechanism employing the rack and snail.<ref>Horological Journal, September 2011, pp. 408–412.</ref> The [[repeater (horology)|repeating clock]], that chimes the number of hours (or even minutes) on demand was invented by either Quare or Barlow in 1676. [[George Graham (clockmaker)|George Graham]] invented the [[Escapement#Deadbeat escapement|deadbeat escapement]] for clocks in 1720.