Need to duplicate an old flat spring
 

On Monday, August 5, 2013 7:01:58 AM UTC-5, Lloyd E. Sponenburgh wrote:
DD fired this volley in

:



How accurate does the speed regulation have to be?



Is there an adjustment mechanism?



It looks to be a call-sign sender, maybe for portable hamfesting, or

maybe a 'code' sender for a crypto pack, with canned messages. Kind of

like our old 'Cack wheels' in 'Nam. You have a "sheet of the day"

indicating a response numbers cross-reference. When you get a particular

message that requires a particular response number, you look up the

cross-referenced number of the day, which you then select on the stack of

codes, and send back multiple times without any human errors.



The one he showed (not exactly like his)does appear to have a speed

adjustment, by moving the friction disk up and down on the bottom sleeve

of the centrifugal weights part. But it looks to be a very critical and

difficult adjustment... no vernier is apparent.



Since automatic receiving equipment for certain CW codes was prevalent by

the 1930s (ticker tape machines), it makes sense that the rate adjustment

is pretty critical. The KSR and ASR teletypes followed shortly, and were

in common use through the late 1970s.



Lloyd





Lloyd

It looks like it’s a Morse Code practice device like the one shown in operation he
http://www.youtube.com/watch?v=byEDYuRIH5E
Maybe made before W1AW broadcast its practice sessions.