[time-nuts] 1903 Railroad self-Winding / Self-setting Clock
paulswedb at gmail.com
Sat Nov 1 11:36:40 EDT 2014
Bill I responded to Mike there seems to be a number of threads running on
So in fact you do have the telegraph coil in the clock. Makes sense to me.
Thats why the 100 V they needed to drive 10-20 ma through the coil over
distance and had to account for line loss.
The boook you mention. Online?
On Sat, Nov 1, 2014 at 8:00 AM, Bill Riches <bill.riches at verizon.net> wrote:
> I have the wall mounted version. I believe that the hour adjust solenoid
> took 100 volts or so. I will check my manual on the clock. At a minute
> before the top of the hour until a minute after the hour all traffic would
> stop on the WU lines and at the top of the hour a 100 v dc pulse came over
> the lines to reset the time. I believe it was in the 30s when WU decided
> they did not want to be in the time business and discontinued the service
> and said everyone could keep their clocks. I can imagine the next day
> clocks going home with office workers. WU charged a buck a month for the
> clock, service, and batteries. Many large offices had hundreds of these
> The book "American Clocks -Volume 2" by Tran Duyly has everything you ever
> wanted to know about self winding clocks.
> Bill, WA2DVU
> Cape May
> This email is free from viruses and malware because avast! Antivirus
> protection is active.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> and follow the instructions there.
More information about the time-nuts