20 Feb
2007
20 Feb
'07
1:33 p.m.
On 19 Feb 2007 at 22:32, Kevin Schoedel wrote:
Alaong with movements wtih electrically driven pendulums (pendula?),
electrically impulused pendulums, more conventional spring-driven clocks
with electric rewinding every frw minutes, etc.
Electric/electronic clocks are _another_ of my interests...
-tony
Before there were quartz crystal oscillators in
watches, Bulova developed
and sold watches with 360Hz tuning fork oscillators.
...and before that, there were electric watches that used a
conventional balance wheel as the timing reference.