On 2015-10-15 08:32, Tom Van Baak wrote:
Nick Sayer writes:
The WU standard time service goes back further than the turn of the 20th
century. It started in 1870.
Also, for a screen full of irresistible SWCC photos, try this:
https://www.google.com/search?tbm=isch&q=self-winding+clock+company
My understanding (perhaps incorrect) was that the sync pulse was once daily
and, as you said,
would cause the hands to “snap” to 12. The trailing edge of the pulse was
synchronized and would
release the clock to operate normally.
That they had something as accurate and widespread as it was so early is
astonishing.
Oh, Padawan, that's just the tip of the iceberg when it comes to the deep and
fascinating history of precise timekeeping.
Recently restored (after a building fire where some were lost) to working
19 Art Nouveau master/slave clocks from 1910:
http://www.gsaarchives.net/2013/04/mackintosh-clocks-feature-on-bbc-news/
more pictures in linked articles from BBC
--
Take care. Thanks, Brian Inglis
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