- Mar 18, 2014
It's a way to connect a stem and bowl with a metal spring widget. Dunhill messed with the idea for a couple years, then abandoned it.What exactly is a 'vernon tenon' please?
Remove hot, maybe; more durable, no. Since the contact area of the prongs is very small, the wear rate is absurdly high. It's why the design was reversed to snap into the stem instead of the shank toward the end of its run---ebonite is considerably more durable than wet wood. The later prongs-into-the-stem version was indeed an improvement, but also much more difficult (and therefore time consuming) to make.It appears to me to be an attempt at a more durable tenon that could be removed hot.
Actually, there can't be any slop at all. That was another problem. A bit of tobacco or etc. caught between the stem face and the shank face and the prongs wouldn't lock. I imagine no small number of lit bowls simply dropped off back in the day.Also the design has some slop in it and might actually be easier to manufacture once jigs were made than hand fitting and finishing a normal mortise and tenon.
10-4 on those things. A properly designed and placed metal ring in the shank would be tough to pull off profitably, though. It couldn't be made of aluminum for galling reasons, and brass, carbon steel, or aluminum would all corrode pretty readily. (Stainless steel would work, but is very difficult to fabricate.) There would also be a cascade of issues resulting from the criticality of seating depth during manufacture, wood-to-metal bonding, etc.Do note that the patent application shows the possibility of using a metal ring embedded in the the shank as a mating surface for the prongs which should reduce wear. Vernon Dunhill (Alfred's second son) was credited with the design.