Tool used to screw bolts

Datec 1950

Object number00037623

NameTool

MediumMetal

DimensionsOverall: 80 x 11 x 5 x 10 mm, 0.02 kg

ClassificationsTools and equipment

Credit LineANMM Collection Gift from Bob Lynch

Terms

DescriptionA tube shaped tool used to screw bolts and owned by diver Bob Lynch who constructed his own recreational diving equipment.HistoryThe 1960s aqualung was probably made in Melbourne and was used until 1972 . The USF A (Underwater Skin-divers and Fisherman' s Association) would meet at Wynns Auditorium in Sydney in the late 1940s. Bob's home made shoulder gun for spear fishing was replaced by a commercially manufactured bazooka with a pistol grip purchased through Mick Simmons. He made the rest of his equipment using an Austrian oxy welding high pressure reducing valve. Air hoses were adapted from WWII gas masks and Bob made his own rings from stainless steel or brass. Air cylinders were from WWII aircraft and contained 40 cubic ft of air. Mouth pieces were adapted from WWII gas masks. The demand valve was worn on the chest. Air was difficult to obtain and Bob either obtained it from Wally Gibbons in North Sydney or from medical air cylinders . Bob Lynch lived in Auburn when he began his diving at Clovelly. He usually dived on his own and was more interested in fishing rather than group dives. When he dived he wore swimming trunks, three crew neck jumpers covered by a seal skin (a wrap on garment of rubberised fabric).The jumpers were altered to make one jumper that would cover the body to create a polo neck jumper with an extra long body. It sometimes took six jumpers to make a good diving jumper. Bob also used a Dick Charles safety belt. It was made of plastic laced at the back with straps that went over the shoulders. On the side was a container with a spark lit bulb which inflated the belt if activated. It was an early form of life belt. Bob experimented with the Danny Wells helmet, a diving helmet customised for each diver. A plaster model of the diver's head and face was made and covered in tube dough with uncured rubber strips. This was then boiled in a kerosene tin to cure the rubber. It was trimmed and glass added to form a customised mask. It never went into commercial production as face masks became available in the 1950s. Bob described an early diving helmet at Clovelly being made of kerosene tins.SignificanceThis tool part is part of a collection belonging to Bob Lynch and represents recreational diving gear from the 1950s and 1960s, spanning both home made technology in the post war period to early commercial gear. It shows how early divers had to make their own equipment until diving gear was readily available in the 1960s .