[time-nuts] Grandfather clock sync'd to 1PPS (from time-nuts Digest, Vol 200, Issue 4)

[Hal Murray]

jfitzgerald at alum.wpi.edu said:
> You guys have me thinking about another "non cheating" technique.    I am now
> imagining a small gear motor/screw arrangement that raises or lowers a mass
> on the pendulum to trim out small variations in swing frequency.    

How are you planning to get power to the motor?

How much would a thin wire running down the pendulum shaft screw up the 
timing?  How long would it last?  I'm picturing thin/flexible wire with a 
generous loop from the fixed clock frame to the pendulum.

I assume people make wire for use cases like that.  Is there a buzzword to 
search for?

Plan B would be to use a photo cell.  You also need control as well as power.  
Maybe 2 photo cells, one for power and the other for data with a filter to 
block the wavelength used for power.



-- 
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