Chalumeau
The chalumeau is the oldest form of the clarinet. It is the first true single reed instrument. The plural for chalumeau is chalumeaux.
Chalumeau Media
Clarinette, registre du chalumeau.
Chalumeau by Klenig (early 1700s), M141 Scenkonstmuseet, Stockholm. NB: There is no reed on this instrument.
Fingering chart from Museum musicum theoreticalo practicum, 1732.