In reply to Jed Rothwell's message of Wed, 30 Mar 2011 14:03:05 -0400: Hi,
I wasn't talking about clocks with synchronous motors, but rather electronic clocks that use the line frequency directly &/or for synchronization, and I think there are still quite a few of those. ><[email protected]> wrote: > > >> It says nowadays there is no compelling >> >technical reason to unify the power system at one frequency. >> >> ...except that clocks which work for one part of country won't work in the >> rest. >> > >They haven't made electric clocks like that for 30 years! They all have >quartz crystal timers in them. I have a 20-year-old bedroom clock with a >battery backup for the timer. > >Automobile clocks used to run off the battery directly. Before quartz timers >came along they were notoriously unreliable. They would be off by a hour or >more after a few months. > >I guess back the 1970s they must have had different electric clocks for east >and west Japan. I never noticed. Then and now, I seldom knew what time it >is. I used a wind-up pocket watch which I often forgot to wind. I now use a >battery-powered pocket watch, since I do not like to be reminded of how >quickly time passes. > >- Jed Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html
