I believe it's just Trade {RIDGID} Mark showing that RIDGID is the trade mark...?pjones wrote:Does anyone know what the "Trade" stands for on some RIGID wrenches.
-Jason
I believe it's just Trade {RIDGID} Mark showing that RIDGID is the trade mark...?pjones wrote:Does anyone know what the "Trade" stands for on some RIGID wrenches.
I thought they were all marked like that 'Trade RIDGID Mark', then I found this one in the basement. I guess I bought it some time ago and forgot. An 8" so I had put it in the regular tool box.pjones wrote:I have always preferentially chosen RIGID wrenches marked in this manner
While some of the dynamic jaws have codes that seem to be dates, we don't have a foolproof definitive methodology for dating them to a specific year of production. Your pipe wrench is definitely WWII or earlier, though. It would be considered wartime. Postwar RIDGID pipe wrenches have an adjusting nut with a recess in the middle of the knurling and a rounded off end on the dynamic jaw.
No. The interlocked "DG" was part of the RIDGID logo since a least 1927, and you have the shape of the end on the dynamic jaw backwards. Square is wartime or earlier; rounded off is postwar.
There was no swash on a RIDGID pipe wrench housing before the 1940 patent (2,192,702). See my chart at the post of page 2.
Long discussion on replaceable jaw inserts on the Fed Specs thread here.lt.luke wrote:The military required replaceable jaws, so look for a rivet to attach the lower jaw.
I wouldn't call that a swash plate, or at least not anything that could be confused with a later swash plate. But that's semantics. Luke's point was that the shape changed. My point is that the first instance of the plate that is still on the wrenches in its modern incarnation appeared in 1940. You can reach your own conclusions if you want.
Nothing to do with belief. Of course they can be identified by era. That was the point of me tracking down all the patents and posting them in one concise chart showing their evolution, patent era to patent era.henry501 wrote:...while I also agree that there is (as yet) no way to specifically month or year date a particular Rigid pipe wrench I do believe we can date them to an era based upon the illustrations in the various patent applications.
It's only the 1940 patent and era that really matters for this site.henry501 wrote:To that end I guess it's now incumbent on me to back that up with photos from my rigid pipe wrench collection with cross references to the patent filing illustrations.
What additional research? Did I miss it somewhere?henry501 wrote: my additional research and collection would never exist if it weren't for the ground work laid out by Greg and others on this thread.
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