Denton, Greater Manchester and then abandoned. After hatting, the most important industry in Denton was the manufacture of lead-acid batteries by Oldham Batteries (Oldham & Son Ltd). In 1865, Joseph Oldham established a millwright general engineering shop and by 1887 this company was manufacturing machinery for the hat-making industry. Another important industry in the area was coal mining and shortly after 1887 the company began making machinery and equipment for this industry, which included miners' portable lamps. Up to this time, miners had always used the safety lamp devised in 1815 by Sir Humphry Davy (1778–1829) but this new battery-powered Davy lamp eventually
History of Newcastle upon Tyne Tyneside, or more accurately Newcastle. Another theory, however, is that the name 'Geordie' came from the inventor of the Geordie lamp, George Stephenson. It was a type of safety lamp used in mining, but was not invented until 1815. Apparently the term 'German Geordie' was in common use during the 18th century. In 1771 a flood swept away much of the bridge at Newcastle. The bridge had been built in 1250 and repaired after a flood in 1339. The bridge supported various houses and three towers and an old chapel. A blue stone was placed in the middle of the