[time-nuts] Mechanical 1PPS Oscillator Disciplining

[DaveH]

Science Madness has a PDF of the book - Projects for the Amateur Scientist
by SciAm columnist C.L. Stong.

The pendulum is on page 290

http://www.sciencemadness.org/library/books/projects_for_the_amateur_scienti
st.pdf

 
Dave

> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf 
> Of Hal Murray
> Sent: Saturday, January 10, 2015 15:09
> To: Discussion of precise time and frequency measurement
> Cc: hmurray at megapathdsl.net
> Subject: Re: [time-nuts] Mechanical 1PPS Oscillator Disciplining
> 
> 
> holrum at hotmail.com said:
> > Basically the solenoid nudged the pendulum
> 
> There was an article in Scientific American many years ago.  
> They used a 
> magnet mounted on the end of a stick attached to the pendulum 
> arm.  The arc 
> of the magnet swung through a hole in the middle of a 
> solenoid coil.  A pulse 
> on the coil at the right time provided the nudge with no 
> physical contact.
>  
> 
> -- 
> These are my opinions.  I hate spam.
> 
> 
> 
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