A welsh coal miner's safety lamp
Numéro d’image : 11903951
| A Welsh coal miner's safety lamp. The safety lamp evolved from a need to prevent the numerous fatal mining accidents of the late eighteenth century that were caused by explosions of methane/air mixtures ignited by the flames of miners' candles. Sir Humphrey Davy's original design was a simple oil burner enclosed in wire gauze cylinder. The heat of the flame was effectively contained by conduction through the wires of the gauze,whose temperature never rose to the ignition point of the methane/air mixture. A later modification (shown here) possessed a thick glass window around the flame and a brass shroud surrounding the upper gauze to protect it from damage | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Johnson, Ben |
| Taille de l’image : | 3437 px × 3496 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
Prix pour cette image À partir de 45 €
Produit vendu
(Calendrier, Carte postale, Carte de vœux, Impression sur textile, Packaging etc)
À partir de 45 €
Usage commercial
(Affichage, Annonce presse, Annonce TV, Carte, Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 45 €
Éditorial
(Digital, Journal, Livre, Livre pratique, Magazine, Télévision etc)
À partir de 60 €
Usage non-commercial
(Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 120 €