[time-nuts] GPS disciplined mechanical clocks
djl at montana.com
Thu Mar 5 07:04:36 UTC 2009
Actually, simply use a pendulum in a vacuum chamber, and pulse a LED shining
toward the pendulum in the plane of rotation. Eventually, radiation pressure
will synchronize it...
----- Original Message -----
From: "Jim Palfreyman" <jim77742 at gmail.com>
To: "Tom Van Baak" <tvb at leapsecond.com>; "Discussion of precise time and
frequency measurement" <time-nuts at febo.com>
Sent: Wednesday, March 04, 2009 11:22 PM
Subject: Re: [time-nuts] GPS disciplined mechanical clocks
> So if I set my GPS locked 3325B to 1Hz (sine wave) and put that into my
> subwoofer and sat that next to my pendulum clock (with its ~1m long
> pendulum) it should keep perfect time.
> 2009/3/5 Tom Van Baak <tvb at leapsecond.com>
>> > mechanical, more of a hybrid, but I don't know how you'd discipline a
>> > mechanical clock with a system that had to drive in parallel with the
>> > mechanism, the two would fight each other.
>> Precision pendulum clocks, when mounted near each other,
>> have been known to eventually get into phase lock. So one
>> idea is to add a GPS 1PPS driven bass speaker or solenoid
>> or some sort of thumping contraption. Perhaps eventually the
>> pendulum clock would lock to the vibrations on the the wall.
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