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>The reason I am emailing is that I have an old mechanical decompression meter >(circa 1960's I think?) and would appreciate any information that anyone out >there in the techdiving world might have on this piece of equipment. I don't >intend to use it but it would be interesting to know how it was intended to >work. > >The unit is rectangular (about the size of 2 cigarette packets), made from >stainless steel with a round gauge on the front. The rubber wrist/arm strap as >with the rest of the unit looks in excellent condition. There are a number of >patent numbers on the unit for USA, Italy, Germany, Switzerland, France, Spain >and U.K. The words "Made in Italy" are written on the gauge face along with many >other numbers and graduations. A brand name "SOS" with a small lightening bolt >above the "O" also appears here. > >Before I go tracing back through patent numbers etc, can anyone help me. I >couldn't find anything on the net about a company called "SOS". I'm italian diver and my english is no good. I hope you understand me SOS company is expired only some years ago. Your object was produced on license SOS by Allemano F. & Figli s.r.l. Via Digione 15, Torino phone 011/751650 or 751659 or 740486 fax 011/7714003 telex 22114-I-224 SOS had produced an object called in italian "decompressimetero" in two versions. The first version had more succes and many italian scuba dived with it. It was the only way for scuba to not use tables. My father had one, he gift it only one year ago to one friend who had broken his previous decompressimetro. The friend actually dive with it without problem to 60/70 m (meter not feet!) and sometime 80/90m. Some other old scuba continue to use it. By your description you have the second version, i've seen it only in photo. I think (i'm not sure) that was produces from early 70'. Your version was produced almost to 1988 (computer aladin was already born!). The principle of work in the first version was a membrane of note permeability that simulate the behavior of only one human tissue. Maybe your version have more membranes and so simulate more tissue. Tell me if you didn't understand or you want more information. Marco -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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