Mining Safety Lamps: a Light in Dark Places

ERRATA: -George Stephenson's surname is pronounced "Steve-enson", not "Stef-enson" -I accidentally say "Air Raid Protection" instead of "Air Raid Precautions" Developed in the early 19th century to reduce the risk of explosions in coal mines, Safety Lamps are a surprisingly long-lived safety technology, used for over 200 years in applications as diverse as testing air in sewers and other confined spaces, marking ruptured gas mains, and even as primitive automotive block heaters. 0:00 Introduction 1:06 Mining “Damps” 2:05 Early Mitigation Efforts 4:13 The 1812 Felling Disaster 4:34 William Reid Clanny 5:28 The Davy Lamp 7:11 George Stephenson’s Geordie Lamp 8:42 The Davy-Stephenson Feud 10:34 Davy & Geordie Lamps - Design Flaws 12:35 Improved Clanny Lamp 13:10 Meuseler Lamp 13:23 Marsaut Lamp 14:17 Cambrian Lamp: Design and Function 15:48 Koehler 209 Lamp: Design and Function 16:23 Early Safety Violations 17:52 Locking Mechanisms 18:28 Auto-Extinguishing Mechanisms 19:26 Internal Ignition Mechanisms 20:20 Electric Lights and Schedule A/B 21:11 Air Testing / Alternative Lamps 23:29 Outro SOURCES https://web.archive.org/web/201108190... https://web.archive.org/web/200308260... https://zenodo.org/records/1432328 https://www.protectorlamp.com/A-brief... https://www.protectorlamp.com/protect... https://www.rigb.org/explore-science/... https://museumcrush.org/a-visual-hist... https://collection.sciencemuseumgroup... https://americanhistory.si.edu/collec... https://www.welshminerslamps.com/lamp... https://mineralogicalrecord.com/wp-co... https://www.woodlibrarymuseum.org/mus... https://collection.sciencemuseumgroup... https://americanhistory.si.edu/collec... https://mineralogicalrecord.com/wp-co... https://www.researchgate.net/publicat...