Who in the electrical industry works or maintains master, slave clock systems.

Ok I admit it's part of a hobby of mine but interesting to know if new systems are being installed now these days, or is everything going the way of cheap quarz clocks showing all different times in public buildings.

I maintained the old WEPB English clock systems ½ second pendulum master clock with about 30 'slaves' in the Henderson POCO depot. output was 24 volts dc for about 2 seconds with polarity change every minute to provide the pulse to the 'slaves'.

There were some very intersting systems on the older pendulum clocks like the Hipp Toggle on the FAVAG masterclocks which provided a direct drive to the pendulum.
Also the outputs to the 'slaves' was via contacts, relays or mercury switches.

The newer masterclocks are obviously electronic and pick up a timereference from a time transmitter like Frankfürt DCF in Germany or via accurate quarz crytals.

It would be very interesting to see through ECN what still going on in this specialized field of electric timekeeping.

Looking forward to your replies

Thanks Raymond alias RODALCO


The product of rotation, excitation and flux produces electricty.