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SUMMARY:"Live" from the Trinity College Clock - Dr Hugh Hunt\, CUED
DTSTART:20200522T150000Z
DTEND:20200522T160000Z
UID:TALK142360@talks.cam.ac.uk
CONTACT:46601
DESCRIPTION:Hugh Hunt is the Keeper of the Clock at Trinity College.  It i
 s a remarkable mechanical instrument\, 110 years old and still capable of 
 keeping time to within one second per month - that's an accuracy better th
 an 1 ppm.  So what is the secret of it's accuracy?  The story will be told
  direct from the clock tower taking advantage of Zoom - one of the "lockdo
 wn" tools of the trade.  We will discuss the basics of timekeeping - the p
 endulum with temperature and barometric compensation - and the extraordina
 ry "double three-legged gravity escapement".  We'll also look at how the c
 lock is wound and regulated. And then there's all the instrumentation that
  now peppers the clock.  Six raspberry pi computers measure just about eve
 rything you might want to measure using lasers\, spirit levels\, microphon
 es ... it's really good fun.  And of course we'll reveal the secret of exa
 ctly when it is best to run "The Great Court Run" - that's all been measur
 ed with great accuracy too!\n
LOCATION:Online (Zoom) - https://us02web.zoom.us/j/81551153300?pwd=T3pWUjN
 6WjREcjVmeFk1VUJaRVR2QT09     Meeting ID: 815 5115 3300
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