Exhibition Label Text: Auto firedamp detector and alarm, 1964-1980s.
Withe the increased use of electrical power at the coalface it became
necessary to introduce peanent methods of detection firedamp
because of the increased risk of explosions.
The red lamp on this alarm flashed every 15 seconds under normal conditions
ato show iw was working. The light would flash every second and an alarm
would sound when dangerous levels of firedamp gas were detected.
Brass and tin lamp, makers plate on front, hanging handle, red filter at base.
H 32.0 Diameter 10.0 cm
Condition checked: Good, 12/6/12 EH
Digital image on Keeper’s computer – S:/Keeper/MyPictures/Exhibitions/DisplayNewVisitorCentre. Taken Nov. 2003.
Probably “Spiralarm” Methane Indicator Lamp, J.H. Naylor of England; identical to photograph in Hayden Nilos Conflow Ltd calendar of Miners Lamp Collectors Series No.1 March 1982 last one.