Improvements in or connected with Miners Safety Lamps.
Номер патента: GB189704171A
Опубликовано: 11-12-1897
Автор(ы): William Ackroyd, William Best
Принадлежит: Individual
Опубликовано: 11-12-1897
Автор(ы): William Ackroyd, William Best
Принадлежит: Individual
Реферат: 4171. Ackroyd, W., and Best, W. Feb. 16. Miners' safety lamps.-A spring E normally holds the pricker C out of engagement with the slot A and the wick D, so that the wick cannot be accidently raised or lowered. The continued use of the wick, after it has become too short to descend well into the reservoir H, is prevented by the provision of a slot G, which, when it comes opposite the slot A, renders impossible the further raising of the wick by means of the pricker.
Improvement in elastic pitmen or connecting-rods
Номер патента: US172903A. Автор: . Владелец: . Дата публикации: 1876-02-01.