13 Oct
2007
13 Oct
'07
6:28 a.m.
On Sat, 13 Oct 2007 01:04:58 -0400 (EDT), Bryan Pope wrote:
And thusly were the wise words spake by dwight elvey
>
>
> The only other thing I consider even more important was the quartz
> crystal used for timing, as an achievement. I'm not sure who to
> credit for that one.
Speaking of the quartz crystal, when did the first
one(s)
(approximately) come out?
Cheers,
Bryan
Walter Guyton Cady developed the first Quartz resonator in 1921 for use in early sonar
while at Wesleyan
University in Middletown CT.
George W Pierce patented quartz crystal oscillators in 1923.
The first quartz clock developed by Warren Marrison a telecommunications engineer in 1927
while
searching for a reliable frequency standards at Bell Telephone Laboratories.
later ....
The other Bob