- Laurence Libin
An improved melodeon patented in England by Richard Archibald Brooman as agent for Joseph Poole Pirsson. The player controlled the registration by finger pressure on the keys (see Double touch ). According to the patent claim (no.2,066, 27 Aug 1860), each key controls several reeds, producing progressive degrees of loudness. Each reed has its own pallet valve, so arranged that when the key is fully depressed all of its reeds will sound, if pressed less deeply only two will sound, and if depressed slightly only one will sound. If the reeds are tuned slightly out of unison, a vibrato will occur when two or more sound together. Pirsson was an American civil engineer presumably related to the New York piano builders Alexander T. and James Pirsson....