Who invented the Lewis pin for lifting granite pieces?

I worked with an old stonemason who told me the single pin Lewis (not the three pin) was invented by a collegue, an Englishman (whose name will come back to me in the middle of the night) whilst working in Australia. I guess it would have been in the 1920s. As he was not a national he was not able to patent it in Aus and so got nothing from it.

Chris Pellett - Albourne Stone