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Re: Speaking of time service

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On 09/10/20 19:09, hancock4@bbs.cpcn.com wrote:
> Here is an ad by the Self-Winding Clock Co which
> made the clocks served by the Western Union time system.
>
> https://archive.org/details/Nations-Business-1946-12/page/n101/mode/1up
>
> Don't know when WU got out of the clock business.  But
> for many years their offices featured one of their clocks.
>
> Don't know if the once common IBM clock systems were
> interconnected with the WU time service (which would've
> made sense for accuracy).

The IBM clocks, with a Graham escapement, were quite accurate
to start. There were several models, but the standard model
was rated at 15 seconds / month, electrically wound spring,
and a more accurate weight driven model at 10 secs / month.
I rebuilt one of the standard models and got it rated to better
than 20 seconds in 3 months. Bit more effort may have done
even better. Not bad for a purely mechanical design...

Chris



>
> https://en.wikipedia.org/wiki/Self_Winding_Clock_Company
>

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Speaking of time service hancock4@bbs.cpcn.com - 2020-09-10 11:09 -0700
  Re: Speaking of time service Chris <xxx.syseng.yyy@gfsys.co.uk> - 2020-09-10 19:24 +0100
    Re: Speaking of time service hancock4@bbs.cpcn.com - 2020-09-10 11:52 -0700
      Re: Speaking of time service JimP <chucktheouch@gmail.com> - 2020-09-10 15:05 -0500
        Re: Speaking of time service Chris <xxx.syseng.yyy@gfsys.co.uk> - 2020-09-10 23:29 +0100
          Re: Speaking of time service gareth evans <headstone255@yahoo.com> - 2020-09-11 19:18 +0100
          Re: Speaking of time service hancock4@bbs.cpcn.com - 2020-09-11 11:42 -0700
            Re: Speaking of time service JimP <chucktheouch@gmail.com> - 2020-09-11 15:24 -0500
        Re: Speaking of time service Peter Flass <peter_flass@yahoo.com> - 2020-09-10 16:12 -0700
          Re: Speaking of time service J. Clarke <jclarke.873638@gmail.com> - 2020-09-10 19:40 -0400
            Re: Speaking of time service JimP <chucktheouch@gmail.com> - 2020-09-11 09:14 -0500
          Re: Speaking of time service JimP <chucktheouch@gmail.com> - 2020-09-11 09:10 -0500
        Re: Speaking of time service hancock4@bbs.cpcn.com - 2020-09-11 11:45 -0700
        Re: Speaking of time service usenet@only.tnx (Questor) - 2020-09-11 19:10 +0000
          Re: Speaking of time service JimP <chucktheouch@gmail.com> - 2020-09-11 15:26 -0500
            Re: Speaking of time service Peter Flass <peter_flass@yahoo.com> - 2020-09-11 16:21 -0700
            Re: Speaking of time service maus <maus@dmaus.org> - 2020-09-12 12:36 +0000
      Re: Speaking of time service Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-09-10 23:34 +0000

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