Henry Albert Fleuss (13 June 1851 – 6 January 1933) was a pioneering diving engineer, and Master Diver for Siebe, Gorman & Co. of London. Fleuss was born in

Marlborough, Wiltshire Marlborough ( , ) is a market town and civil parish in the English county of Wiltshire on the Old Bath Road, the old main road from London to Bath. The town is on the River Kennet, 24 miles (39 km) north of Salisbury and 10 miles (16& ...

in 1851. In 1878 he was granted a patent which improved

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. ...

s. His apparatus consisted of a rubber mask connected to a breathing bag, with (estimated) 50-60% O₂ supplied from a copper tank and CO₂ scrubbed by rope yarn soaked in a solution of caustic potash, the system giving a duration of about three hours. Fleuss tested his device in 1879 by spending an hour submerged in a water tank, then one week later by diving to a depth of 5.5m in open water, upon which occasion he was slightly injured when his assistants abruptly pulled him to the surface. Fleuss's apparatus was first used under operational conditions in November 1880 by Alexander Lambert, lead diver of the

Severn Tunnel The Severn Tunnel ( cy, Twnnel Hafren) is a railway tunnel in the United Kingdom, linking South Gloucestershire in the west of England to Monmouthshire in south Wales under the estuary of the River Severn. It was constructed by the Great Western ...

construction project. Trained by Fleuss, he was able to close a submerged sluice door in the tunnel which had defeated the best efforts of hard hat divers due to the danger of their air supply hoses becoming fouled on submerged debris, and the strong water currents in the workings. The same apparatus was later used several times to rescue mine workers in flooded workings. Some time before the

First World War World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

, the Fleuss-Davis independent breathing set for hardhat divers appeared. This device consisted of two tanks, one each for compressed air and

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 ...

. The gases were mixed in a manifold between the two tanks and the diver's mouthpiece. The manufacturer claimed success of this unit to depths of 66 feet. Fleuss also invented the Fleuss vacuum pump, which was a double action Guericke type pump which delivers an almost constant suction. It uses a cylinder divided in halves: as one half of the cylinder is filled with air, the other half is evacuating air to the atmosphere by one stroke of the pump. The next stroke reverses this action, producing the constant flow. He died 6 January 1933 at Thorndon Cross,

Okehampton Okehampton ( ) is a town and civil parish in West Devon in the English county of Devon. It is situated at the northern edge of Dartmoor, and had a population of 5,922 at the 2011 census. Two electoral wards are based in the town (east and west) ...

, aged 81.

References

External links

Building the Severn Tunnel
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Turks and Caicos Islands The Turks and Caicos Islands (abbreviated TCI; and ) are a British Overseas Territory consisting of the larger Caicos Islands and smaller Turks Islands, two groups of tropical islands in the Lucayan Archipelago of the Atlantic Ocean and n ...

postage stamp with an image of
Fleuss Oxygen Rebreathing Apparatus, 1878
Diving engineers British inventors People from Marlborough, Wiltshire 1851 births 1933 deaths {{UK-engineer-stub