Eureka Regulating a Eureka

[Neville Michie]

Hi,
Can anyone tell me the sensitivity of the regulator on a Eureka clock?
The eight legged star wheel has 4 divisions on the scale for each leg,
how much does moving it one leg change the rate?
I thought that this information might be in one of the sources
on Eurekas but I have not been able to find it.
I am just getting a derelict Eureka to run again after having to
make a replacement train for it after it was destroyed by someone
trying to quartz it.
Cheers from
Neville Michie
in Sydney.

 

[Tinker Dwight]

I can't help much on the marks.
I just wanted to say, if people wanted to a quartz
in a clock like this, why don't they just sell it and
buy something to tell time. The left overs, they can
put in the bank to buy batteries.
Tinker Dwight

 

[Snapper]

Hi Neville,
Good to see you repairing the damage done to a relatively rare clock.
I my experience, (admittedly on only one Eureka) the rating star has a somewhat "loose" effect on the going rate. I can adjust the star on my clock say one turn in one direction, and that will affect the rate to a variable extent which seems dependent on temperature. Where I live in the UK, the ambient temperature can vary from -10 to +25 Centigrade degrees over a twelve month period, and although the room in which the clock is situated does not vary anywhere near that amount, it is enough for me to run out of adjustment on the star wheel. If the temperature is relatively stable, I can get the clock running to within a few minutes per day.
It doesn't bother me, but rather adds to the quirkiness of the clock.

 

[Tinker Dwight]

If it is varying by that much a day, it is in need
of some form of servicing. Being a constant
amount each day is just adjusting but if it varies
that much something is not working well.
Tinker Dwight