ATMOS Clock timing
Chris Willson
I recently bought an ATMOS clock, which I believe was built in the '70s (S/N
3000,000 range) and it's losing about 2 1/2 min a day.
Before I take it to someone who knows what he/she's doing, I'd like to
understand a little more about what's going on inside the clock.
I was wondering if any other ATMOS owners out there, whose clocks are
keeping better time than mine (a few secs a day is normal), could tell me:
1. the amplitude of the swing you are getting on the pendulum, as measured
in degrees of rotation.
2. the period of the swing, i.e. time for one complete cycle.
TIA
Chris
The Baron
Chris Willson <will...@ican.net> wrote in message
news:f47g6.246$uz1.37...@news1.tor.primus.ca...
Mike Murray
>Hello everyone:
>
>I recently bought an ATMOS clock, which I believe was built in the '70s (S/N
>300,000 range) and it's losing about 2 1/2 min a day.
2 1/2 minutes a is not adjustable via the adjustment lever.
>Before I take it to someone who knows what he/she's doing, I'd like to
>understand a little more about what's going on inside the clock.
>
>I was wondering if any other ATMOS owners out there, whose clocks are
>keeping better time than mine (a few secs a day is normal), could tell me:
>
>1. the amplitude of the swing you are getting on the pendulum, as measured
>in degrees of rotation.
The amplitude should be 360 degrees in one direction at the minimum.
Ideally, the amplitude should be 540 degrees in either direction.
>2. the period of the swing, i.e. time for one complete cycle.
It "ticks" once every 30 seconds.
Robert S. Lawrence
Geneva in October 1968. The cost was $125. It has been running
continuously since I removed it from its shipping box when I
arrived home from that trip to Switzerland. It has never been
lubricated or cleaned. There is a pendulum locking lever just above the
bob.
The pendulum has a one-minute period, moving the minute hand
one-half minute at the center of each swing. The amplitude of the swing
is about 410 degrees, peak to peak. There is a regulator
lever at the top of the pendulum suspension but I cannot see how
it works. The minimum practicable movement of that lever affects
the rate by about ten seconds per week. The rate is temperature
dependent so, in my house, the lever must be moved seasonally.
--
Robert S. Lawrence
204 Gold Run Road, Boulder, Colorado 80302
303 442-7534
303 444-7719 (fax)
Permanent e-mail address: lawr...@colorado.edu