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May 1, 2011 02:15 am PDT

Horology considered hazardous: the "German Time Bomb" clock with its deadly mainspring

Robotech sez, "You wouldn't expect gears and springs to constitute a literal safety hazard, but my antique clock repairman father pointed out this PDF file about an antique anniversary clock whose idiosyncratic construction means that its mainspring can potentially unwind catastrophically, destroying the clock and injuring bystanders. This destructive potential has earned it the nickname 'the German Time Bomb.' The article advises clockmakers wear heavy protective clothing if they should ever need to repair one." If you are considering working on the movement, either to service or repair it, you need to be aware that this clock was not nicknamed 'The German Time Bomb' as a term of endearment but because it can and does cause injury without any warning, and it can do so at any time, ticking or not. If you are not an experienced clock repairer, do not attempt to work on it. Put it in a strong carton, cover it with an old towel, seal the box and mark the box appropriately. Store it away from children. The Sigfried Haller 'Time Bomb' Anniversary Clock (PDF) (Thanks, Robotech!)...


Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/TCeMmryAcRs/horology-considered.html

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