For all those out there who don't have your own BPO 36 master clock, here is a youtube video that shows the detail of the Hipp toggle in action. The Hipp is the key to these clocks excellent time keeping.
http://www.youtube.com/watch?v=lmx5iy4qwhI Yes I know, the sound track IS horrible! But you can hear most of the ticks... Not my video, I hasten to add.. For more info on the Hipp toggle, just google and all will be revealed. DaveB, NZ ----- Original Message ----- From: "Neville Michie" <namic...@gmail.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Thursday, March 05, 2009 4:05 PM Subject: Re: [time-nuts] GPS antenna installation problem > Another, maybe the original tape, was called 100 Miles per Hour Tape > and was sold years after fabric > covered aircraft wings went out of style as it was so universally > useful. > As the name suggests it was rated for repair of aircraft fabric to > be > used up to speeds of 100 MPH. > cheers, Neville Michie > > PS. I have a type 36 post office clock running and it has a > synchronising relay that forces the phase > of the 30 second output pulses to the nearest 2 seconds, by rotating > the count wheel which has a cardioid cam. > At a fixed time every day this relay was energised from the central > site to correct any phase creep in the > clocks in the regional post offices. I have occasionally thought of > linking it to a GPS time source. > cheers, NM _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.