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Page "Timeline of diving technology" ¶ 127
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Siebe and Gorman
The British used the Davis apparatus ( invented in 1910 by Robert Henry Davis and mass-produced by Siebe Gorman ) for submarine escape, but they adapted it to equip their frogmen during World War II.
In 1948 the Cousteau-Gagnan patent was also licensed to Siebe Gorman of England, when Siebe Gorman was directed by Robert Henry Davis.
Siebe Gorman was allowed to sell in Commonwealth countries, but had difficulty in meeting the demand and the U. S. patent prevented others from making the product.
The harnesses of many diving rebreathers made by Siebe Gorman included a large back-sheet of strong reinforced rubber.
With equipment on loan from Siebe Gorman, he and Penelope (" Mossy ") Powell penetrated into the cave, reaching " Chamber 7 " using standard diving dress.
* 1903: Siebe Gorman starts to make a submarine escape set in England ; in the years afterwards it was improved, and later was called the Davis Escape Set or Davis Submerged Escape Apparatus.
** Siebe Gorman and / or Heinke start making Cousteau-type aqualungs in England.
Siebe Gorman made those first patented aqualungs at Chessington from 1948 to 1960, popularly known as tadpole sets.
But in Britain Siebe Gorman and Heinke kept aqualungs expensive, and restrictions on exporting currency stopped people from importing them.
In the early 1950s, diving regulators made by Siebe Gorman cost £ 15, which was an average week's salary.
( Siebe Gorman gave its drysuit the tradename " Frogman ".
In the late 1940s and early 1950s, La Spirotechnique started exporting the Aqua-Lung and leasing its patent to foreigner companies ( like the British Siebe Gorman ).
* An early make of Siebe Gorman Aqua-Lung with a twin-hose regulator and two air cylinders.
Siebe Gorman either had no idea about sport diving then, or else was against sport diving, and expected Aqua-Lungs to be used for light commercial diving.
Presumably, lawyers for Cousteau or L ' Air Liquide could have slowed or stopped this genericization by taking prompt action, but this seems not to have been done in Britain, where Siebe Gorman held the British rights to both the trade name and the patent.
In Britain Siebe Gorman ( who held the rights to the tradename " Aqualung ") made no serious attempt to control use of the word, and " aqualung " remained a common public generic word for that sort of apparatus-including in the British Sub-Aqua Club's official publications – for many years.
The French-made Pêche-Sport Suit and the UK-made Siebe Gorman Swimsuit were both made out of sponge rubber.
Siebe Gorman Savox in a coalmining museum
Before open-circuit SCBA's were developed, most industrial breathing sets were rebreathers, such as the Siebe Gorman Proto, Siebe Gorman Savox, or Siebe Gorman Salvus.

Siebe and Royal
The older Royal Navy Clearance Diver's and United Kingdom | British Special Boat Service | SBS frogman's full-face mask with a big front window and a mouthpiece inside made by Siebe Gorman

Siebe and Navy
While Siebe Gorman became the standard from which all helmets developed, the U. S. Navy Mk V helmet of 1915, has become the iconic helmet.
* 1960's: Siebe Gorman started making scuba gear aimed at the public market ( sometimes using the tradenames Essgee and Essjee ), although they had made it earlier for work divers and the Navy.
Unlike Siebe Gorman, who had only one series of serial numbers for their diving helmets, except for the last productions ( which were meant most probably for the Russian Navy ), Heinke used many series of serial numbers for them.

Siebe and aqualungs
* 1948: Siebe Gorman was making aqualungs of the type nicknamed ' Tadpoles '.
* 1954: Around now Siebe Gorman started making Cousteau-Gagnan-type aqualungs, and diving suits for commercial and sport diving.
Until the 1950s in Britain Siebe Gorman kept aqualungs expensive, and many British sport divers had to use home-made breathing sets and ex-armed forces or ex-industry rebreathers, and some became expert at home-making scuba diving demand regulators from industrial parts such as Calor Gas regulators.

Siebe and be
* 1907: The Siebe Gorman Proto industrial rebreather starts to be made.

Siebe and used
The earliest of these breathing sets may have been modified Davis Submerged Escape Apparatus ; their fullface masks were the type intended for the Siebe Gorman Salvus, but in later operations different designs were used, leading to a fullface mask with one big face window, at first oval and later rectangular ( mostly flat, but the sides curved back to allow better vision sideways ).
This special corps used an early scuba set which did not make bubbles, called A. R. O ( from Auto Respiratore ad Ossigeno ), an evolution of the Dräger oxygen self-contained breathing apparatus designed for the mining industry and of the Davis Submerged Escape Apparatus made by Siebe, Gorman & Co and by Bergomi, designed for escaping from sunken submarines.
The frogmen in the real war operation mostly used Sladen suits and an early type of Siebe Gorman rebreather.
For much of the time, up until the 1960s he used a Siebe Gorman Mark IV Amphibian oxygen rebreather to train divers with in oxygen diving, until in the 1960s he sold it to one of his diving trainees.
* Frogman was a tradename used by Siebe Gorman for a brand of diver's drysuit in the 1960s and perhaps earlier
For many years Clearance Divers used the Siebe Gorman CDBA rebreather.

Siebe and with
BTR plc was a British industrial conglomerate, which merged with Siebe in 1999 to form BTR Siebe plc, later renamed Invensys.
In 1999 BTR merged with Siebe to form BTR Siebe plc, which was renamed Invensys plc.
Siebe Gorman's trade catalog describing this set showed two sorts of diver wearing this set, both with weighted boots, and with no mention of free-swimming.
Computer-generated imagery | CGI image of human torpedo: British Mk 1 " chariot " ridden by two frogmen with Siebe Gorman CDBA | UBA rebreather s
2 workmen with Siebe Gorman Salvus rebreathers set off to clean up a building after fumigation.
* 1878: Henry Fleuss with help from Siebe Gorman designed a practical oxygen rebreather: see Rebreather # History of rebreathers.
* 2001: Parvis Moradifor sells the assets ; he also sells the name Siebe Gorman to a Malaysian concern, who with a factory in Malaysia, still make breathing apparatus and parts for civilian and military use, including an industrial breathing set and a gasmask ; their name is " The Siebe Gorman Company ( Malaysia )".
Heinke Ltd in London also made diving gear and had connections with Siebe Gorman.
In 1935, Balcombe made enquiries with Siebe Gorman, the leading diving engineers of the time.
After that he bought a Cressi-Sub sport diving oxygen rebreather from Italy, but after a year its breathing bag perished, and he replaced it with a Siebe Gorman British naval type breathing bag, which is still as good as new now ( as of 2005 ).
The two sought the assistance of Robert Henry Davis of Siebe Gorman, the inventor of the Davis Escape Set, and with Haldane's and Davis ' resources a prototype suit was constructed.
* 1950: After this date the firm's fortunes declined, as with Siebe Gorman.

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