In 2007, I wrote a post here about the Aerophor, a device designed in the early 20th century to assist wind players with sustained passages. While controlled reservoirs of air have long played a part in creating a sustained tone for certain wind cap and free reed instruments, the foot pedal-operated Aerophor appears to have been a unique machine as it was intended for standard orchestral winds.
I was able to find little further information about this until, recently, Mr Jacob Polak, of Amsterdam, visited this site and communicated that the inventor of the Aerophor was, in fact, his grandfather, Bernard Samuels, of the Netherlands, for a time conductor at the Royal Opera in Schwerin. (Following other web sources, I had misspelled the inventor's name and misidentified him as Belgian rather than Dutch.) Mr Polak was kind enough to send some fascinating documentation about the Aerophor which he has permitted me to share here (click on individual images below to enlarge.) Based on the description contained in the text the last image below, the Aerophor was a more subtle and sophisticated device than I had previously imagined, consisting not only of a bellows and tube, but a reservoir of water and an electric light bulb, insuring that the air supplied was appropriately warm and damp. Lacking an actual specimen of the Aerophor, perhaps this documentation will be sufficient encourage a recreation of this useful auxiliary instrument!
[Image sources: 1st picture: unknown; 2nd picture: "How the Aerophor Aids Players of Brass and Wood Winds", The Music Trades, April 4, 1914, p. 41; 3rd picture and details: "Der Tonbinde-Apparat 'Aerophor'", Allgemeine Deutsche Musiker-Zeitung, 8. Februar 1913; final picture: "Artificial breath for wind instruments", Technical World Magazine, August 1914, p. 906. Again, many thanks to Mr Polak for his research.]