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Economy 7 Time Clocks 40/50 years ago...

AncientMariner
To help resolve a query in the Ask The Community Forum, why did the time clock for Economy 7 and similar supplies with two meters and  a full load time clock switch (no contactor), tick?

Were they an auto-rewind clockwork time clock so as to keep in time during/following a power cut?

Clive

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    Hello Ancient Mariner. I installed many of these in my days as an Electricity Board (remember them?) Contracting Dept. electrician. The two prime makes were Venner and Horstmann. Both of these had an 8-day clockwork spring reserve for the clock; this was hand-wound by key on installation. Once wound up, they all had a nice tick. I have only recently dumped my Horstmann key (it was common to both makes)! Regards, Colin.
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    Hello Ancient Mariner. I installed many of these in my days as an Electricity Board (remember them?) Contracting Dept. electrician. The two prime makes were Venner and Horstmann. Both of these had an 8-day clockwork spring reserve for the clock; this was hand-wound by key on installation. Once wound up, they all had a nice tick. I have only recently dumped my Horstmann key (it was common to both makes)! Regards, Colin.
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