5 Apr
2001
5 Apr
'01
9:53 a.m.
At 07:11 PM 4/4/01 -0400, you wrote:
Pendulums could be sync'd by starting their swing at the
same time by a pulse on a control line (which would release
a catch that had held the pendulum at top-swing), and they
could be re-sync'd and their swing regenerated with a well-timed
pulse to an electromagnet at the apogee of the swing-path.
No doubt a great deal of early computing and fax technology
could borrow from clock technology.
- John
P.S. My youngest son is named Seth Thomas. :-)
> First fax
machine was over 100 years ago with synchronized
> pendulums.
How do you synchronize to a remote pendulum?
I'm stepping into memories now, including college physics,
But, as I recall and understand, the pendulums would basically
oscillate at the same frequency since they were of the same length.
All that would be required is to send a synch pulse at the end
of a scan (rough analog to TV VIR) to align the next full scan.
The remainder body of the pendulum swing would be kept
in tune using only the ballistic physics of the thing.