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:[email protected]] On Behalf > Of Hal Murray > Sent: Saturday, January 10, 2015 15:09 > To: Discussion of precise time and frequency measurement > Cc: [email protected] > Subject: Re: [time-nuts] Mechanical 1PPS Oscillator Disciplining > > > [email protected] 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. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
