Bicycling

I also pointed out my net was down and I was using a Smart Phone, which is hard to double check facts while typing (unlike a lap top where you can switch between two screens easily). Thus I do have a passable excuse for my error.,

As to Wentworth himself, Wentworth was a well known British inventor in the mid 1800s. He is bst known for setting up the first standard method of making interchangeable nuts and bolts. Till Wentworth, every maker of nuts and bolts had their own standards (and could vary from one lot of nuts and bolts to the next thus little if any interchangeability even within a lot of nuts and bolts).

https://en.wikipedia.org/wiki/Joseph_Whitworth

I should have looked it up and catch myself, I should have known it was Dunlap, another British inventor not Wentworth. Please note Dunlap's own value was replaced within three years by the "Woods Value" (Which permitted deflation). Given Dunlap invented the original Dunlap Value, and the Woods Value is an improvement on that Value, the Woods Valve is sometimes referred to as the "Dunlap Value".

https://en.wikipedia.org/wiki/Dunlop_valve

Woods Valve
A type of valve very rarely seen in the U.S., which has a bottom similar to a Schrader and necks down to about the size of a Presta is the Woods valve, also known as the "Dunlop" valve. Woods valves were formerly popular in the British Isles and Asia. You can pump them up with a Presta pump.



http://www.sheldonbrown.com/gloss_w.html#woods