Charles Wheatstone was an interesting character. Obviously an extremely intelligent person, but it's a little unclear how many things he directly invented and h

Charles Wheatstone was an interesting character. Obviously an extremely intelligent person, but it's a little unclear how many things he directly invented and how many were from his employees. The wide variety of his inventions is quite interesting, and the three I can think of off the top of my head; telegraph machines, railway points, the English concertina; are pretty diverse! My knowledge is more in the concertina area of that, where I believe that Louis Lachenal is actually the source of a lot of the developments at Wheatstone before he left and set up a competing company (Lachenal). Sources are hard/impossible to come by on the internet for that, as most of the people who are experts in this are rather old by this point. I suspect that CW was a bit of a serial inventor whose attention wasn't held for long :) FWIW I have a 1930 Wheatstone Maccann Duet concertina that I play regularly, and it is rather beautifully made. EDIT: I was sure he was involved in the invention of railway point systems but I now can't find any references, annoyingly.