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Yes, I think that they are all much of a muchness and differ only
in the circuitry employed. This example has a medium size relay
as the interface between master and distribution outputs plus some
spark suppression components.
On 22/03/2021 09:34, John Hubert wrote:
That looks very similar to the Synchronome type.
Good morning all,
Following your request I attach an image of
a six circuit Gillet and Johnston distribution system
for your information. The jack plug stored at the top
of the unit can be removed and inserted in any of the
other circuits to display that circuit current on the
meter and the rheost adjusted to give the required
current in that circuit. To advance a particular
circuit the toggle switch is moved from normal to
advance and the push button next to the meter
depressed as required to bring the circuit to time.
On 22/03/2021 06:52, Simon
With GPO clocks, you have a GMT relay set
so that you can power several clock circuits in
With Synchronome, you have a distribution
board, which does the same thing. It just allows
expansion so that a really huge enterprise can run
hundreds of clocks. From memory, County Hall in
London was fitted out by Gillet & Johnston and
had 1200 clocks running in it.
I would have loved to see the distribution
system used there!
Simon GPO Clocks