Blackett's Aerophor

:''Distinguish from aerophor (or aerophore) (a device to assist musicians playing

wind instruments A wind instrument is a musical instrument that contains some type of resonator (usually a tube) in which a column of air is set into vibration by the player blowing into (or over) a mouthpiece set at or near the end of the resonator. The pitc ...

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http://renewablemusic.blogspot.ca/2007/01/long-winded.html], and from aerophone.'' {{Unreferenced, date=December 2009 Aa aerophore1

The Blackett's Aerophor is a nitrox semi-closed-circuit

rebreather A rebreather is a breathing apparatus that absorbs the carbon dioxide of a user's breathing, exhaled breath to permit the rebreathing (recycling) of the substantially unused oxygen content, and unused inert content when present, of each breath. ...

with liquid gas storage made in England from 1910 onwards for use in

mine rescue Mine rescue or mines rescue is the specialised job of rescuing miners and others who have become trapped or injured in underground mines because of mining accidents, roof falls or floods and disasters such as explosions. Background Mining ...

and other industrial uses. It was used until the 1950s. "Aerophor" is from

Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...

αεροφορος = "air-carrier". Its breathing bag was on the chest, of rubber, in a strong leather case. The other parts were in a backpack. It had two corrugated breathing tubes coming out of the

backpack A backpack—also called knapsack, schoolbag, rucksack, rucksac, pack, sackpack, booksack, bookbag or backsack—is, in its simplest frameless form, a fabric sack carried on one's back and secured with two straps that go over the shoulders ...

. Its duration on a fill was 2 hours. It had: * A heat-insulated tank containing 5½ pounds of liquid

nitrox Nitrox refers to any breathing gas, gas mixture composed (excepting trace gases) of nitrogen and oxygen. This includes atmospheric air, which is approximately 78% nitrogen, 21% oxygen, and 1% other gases, primarily argon. In the usual applicatio ...

containing at least 50% of

oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as ...

, which had to be filled immediately before use. * At the bottom of the backpack, a large canister filled with 2 pounds of what one description called "potash" and another description "soda". Colonel Wiliam Cuthbert Blackett introduced this Aerophor in the

Durham Durham most commonly refers to: *Durham, England, a cathedral city and the county town of County Durham *County Durham, an English county * Durham County, North Carolina, a county in North Carolina, United States *Durham, North Carolina, a city in N ...

area in 1910, and it was later improved by Messrs G.L.Brown and F.P.Mills. All or some of them were made by Guest and Chrimes Ltd. of

Rotherham Rotherham () is a large minster and market town in South Yorkshire, England. The town takes its name from the River Rother which then merges with the River Don. The River Don then flows through the town centre. It is the main settlement of ...

. Rebreathers Industrial breathing sets