Fire escape patent,1882. Artwork of a fire escape friction device invented by Oscar F. Davis. The device allowed a person to control the speed of descent down a rope | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / US Patent And Trademark Office |
Taille de l’image : | 2427 px × 3640 px |
Model Release : | Non requis |
Restrictions : | - |