Flame Safety Lamp

In the early days, miners used candles, flaming torches and oil lanterns to light their way. As mines got deeper, this type of lighting presented enormous dangers due to the presence of methane gas which is potentially explosive in high concentrations when exposed to a naked flame. Underground explosions were common but the impetus to find a solution to the problem came from the Felling Pit Disaster of 1812, in which ninety-two men and boys were killed.

Fig 1: Pre Flame Safety Lamp days a ‘Penitent’, dressed in damp clothes, exploded the firedamp with a candle on the end of a long stick.

The principle of the flame safety lamp was presented by Sir Humphrey Davy in 1815. Although ‘Davy Lamp’ is the common term used by most people to describe the device, the design was based on the pioneering work of George Stephenson and Dr William Reid Clanny. However, Davy, an established figure within the Royal Society was awarded a £2,000 prize for the invention. It was only later in 1816 that Stephenson’s contribution was officially acknowledged by the Royal Society. In 1816, Clanny published a paper ‘Practical Observations on Safety Lamps’. He also made improvements to the design including the addition of the distinctive bonnet. The Davy lamp was adopted nationwide with the exception of the North East where George Stephenson’s design was more commonly used, the so called ‘Geordie Lamp’.

Fig 2: Anthony Kirby, an Eastwood Coal mining Historian, (middle) shows an original Davy Lamp to Mark Dennison (BBC Radio Nottingham) at the Bestwood Winding Engine House – March 2014. Photo Credit: MuBu Miner.

Davy appreciated the value of his lamp but refused to patent his design, turning down a fortune and stating – ‘My sole object was to serve the cause of humanity’. Early safety lamps were quite fragile: The gauze in the Davy lamp rusted, while the glass in Stephenson’s design was easily broken. Later, Robert Gray (who first wrote to Davy concerning the problem of methane gas), Dr Mathieu-Louis Mueseler (Belgium) and Jean Baptiste Marsaut (France) independently resolved these problems by using multiple gauze cylinders.

Fig 3: Deputy, Stuart Wadsworth, testing for mine-gas at Annesley-Bentinck Colliery in 1995. Photo Credit – MuBu Miner collection.

The modern Garforth lamp was developed by the Mines Research Establishment from a design described by Sir William Garforth in 1883 to provide safe lighting in coal-mines as well as providing an effective tool for the detection, observation and measurement of methane gas or ‘firedamp’. The device allows air samples to be taken from areas of the mine and blown into the lamp by means of an aspirator bulb. Changes in the colour of the flame reveal the composition of the gas. For example; a large area of blue flame observed above the test flame indicates the presence of methane gas.

Fig 4: Main components of the miners Flame Safety Lamp. Photo Credit – MuBu Miner collection.

Fig 5: The gauzes inside the bonnet is a very important part of a Flame Safety Lamp. Photo Credit – MuBu Miner

Fig 7: 1982 NCB Flames Shapes document. Photo Credit – MuBu Miner collection.

Fig 8: Flame shapes for testing with a Flame Safety Lamp to show percentages of Firedamp (methane) . Photo Credit – MuBu Miner collection.

Short video from the National Coalmining Museum for England showing the component parts of a miners Flame Safety Lamp and how it works. (6 mins).

Fig 8: Deputy’s Gas Testing Certificate, 1969. Source – MuBu Miner collection.

Fig 9: Lamp Cabin attendant inspecting a Flame Safety Lamp in the 1950’s. Source – Coal Authority.

During the London 2012 Games, the Olympic Torch was transported across the country by means of what was essentially a miner’s flame safety lamp. In November 2013, an unlit flame safety lamp accompanied Russian Cosmonauts on a spacewalk, ahead of the Sochi 2014 Winter Olympic Games.

The Flame Safety Lamp is an important part of our coalmining heritage and feature in most East Midlands based coalmining heritage centres and museums including the Pleasley Pit digital trail https://mytrail.co.uk/trail05-07-lamp-room/

Fig 10: Lamp Cabin attendant mannequin at Snibston Heritage Trust, Coalville, Leicestershire. Photo Credit – MuBu Miner

Fig 11: Flame Safety Lamp collection belonging to the South Derbyshire Mining Heritage Group. Photo Credit – MuBu Miner

Fig 12: Flame Safety Lamp mining memorial at Bilsthorpe, Nottinghamshire. Photo Credit – MuBu Miner

Fig 13: KS3 Year 9 pupils learn about the miners Flame Safety Lamp at Selston Arts and Community College, Nottinghamshire, in 2008. Photo Credit – MuBu Miner

Fig 14: GR6 Flame Safety Lamp of the late Eric Amos (1933-2006), Colliery Overman at Bentinck and Annesley Collieries. Photo Credit – MuBu Miner collection.