That style is used to align round stock for welding. Exhaust pipe usually. Or at least thats what we used them for.
Kevin
Slow or fast, I'm just glad you chimed in backing up rsanter and my initial observation.man i type slow
I guess I need to get out of the front office and out back to the welding shop more often!As anyone involved in welding/body repair will know...
I don't know, B., but I can tell you that the Directory of American Tool and Machinery Patents (DATAMP) doesn't list any jaw variations after the one (1953) I listed above.I remember there used to be a leaflet included in the Vise Grips carton that gave a brief history as to how the Vise Grip was invented and listed all the variations available. Do they still do this?
Bhriain,Any info on finishes/plating used on Vise Grips?
Have you encountered the British "Mole-Grips" similar to the 'Genuine One'?
You mean like these?As anyone involved in welding/body repair will know, Petersen also produced two other types of welding pliers - one had very wide plain flat jaws (looked like 2 pieces of 1/8" flat stock), other type was like a 'C' clamp, came in different sizes, from 6" to approx 18" (with corresponding throat depths).
They also produced one with a length of chain fixed to one jaw and the other end could be hooked onto the other jaw after wrapping it around the item/s to be clamped, before squeezing the handles to tighten. This type could be used for clamping large/odd sized items for welding as well as a conventional chain wrench.
B.


Would you please post some photos of the tool itself, Brian?I dug out my NOS pair of Vise Grip model 9R welding clamps for a photo opp.
Would you please post some photos of the tool itself, Brian?
As I noted above, mine is marked "No. 9" and "PAT PEND". I don't know if that refers to the jaws or something else. As you may have noticed, mine does not have the locking release mechanism. That patent - 2,514,130 (not owned by Petersen, incidentally, and licensed to several mfgrs, link to USPTO record here), was granted July 4, 1950, helping to date mine to the 1940's.
As No. 9R, I'm speculating yours are later. And I'm curious to see how yours are marked, whether they have the lock-release, and if there is a patent on them.
Is there a leaflet in the box giving the history of Petersen MFG and showing the range of pliers available?
B.
Would you please post some photos of the tool itself, Brian?
As I noted above, mine is marked "No. 9" and "PAT PEND". I don't know if that refers to the jaws or something else. As you may have noticed, mine does not have the locking release mechanism. That patent - 2,514,130 (not owned by Petersen, incidentally, and licensed to several mfgrs, link to USPTO record here), was granted July 4, 1950, helping to date mine to the 1940's.
As No. 9R, I'm speculating yours are later. And I'm curious to see how yours are marked, whether they have the lock-release, and if there is a patent on them.
^^ this a a Vise-Grip Pinch-Off Tool No. RR.