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
Durham Miners Heritage Centre Durham Miners Heritage Centre The Durham Miners Heritage Centre was a museum, now closed, run by the Durham Miners Heritage Group at Neville's Cross, Durham, England. It had a display of coal mining memorabilia and an exhibition of art. One of the main reasons for the display was to educate the next generation of children about the mining past of County Durham and to give opportunities to research coal mining history, especially local school groups in the area and visitors to the city. The displays included mining pit lamps such as the famous Davy lamp, tools used in the mining