That's a great link! The timeline format is wonderful.
Have you noticed that 1750 was a huge leap for the clarinet in regards to composers?
The Mannheim School may have been the catalyst. Have a look at the Wikipedia page here: https://en.wikipedia.org/wiki/Mannheim_school
The focus of the school was geared toward woodwinds so this does make sense.
Yes, and from 1830-1845 the most significant advances were made in such a short period of time--advances that survive with only minor modification even today. It's interesting to see how inventions stir inventions.
The first Industrial Revolution ran from 1760 to 1820 or 1840.
In 1806, a fellow by the name of Claude Laurent invented the post/rod/key system that we all know for his flutes.
http://thesax.info/makesandmodelslist/2013/12/01/claude-laurent-crystal-flutes/ Prior to this, woodturners would need to turn a bump in the instrument (as you can see above), and then carve out a channel to run the key and its axle through.
Steel finally became good enough (consistent enough) and able to be manufactured in sufficient quantities in the early part of the nineteenth century, with the first practical locomotive invented in 1811 ("Salamanca" on the Middleton Railway).
Rotary valves appeared on brass instruments in 1814.
It's worth noting that piano wire as we know it was invented in 1834.
Boehm's 1835 flute took Laurent's invention one step further, placing the long axles all on the same side of the keys so that they opened and closed in the same manner and gave us what we know now as the Boehm system.
Piston valves as we know them on brass instruments appeared in 1838.