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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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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. |
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