Ladder gripping attachment patent,1913. Artwork showing a device invented by Edmond Dennis that allows two people to climb at opposite ends of a ladder suspended in mid-air.The shoe attachment grips to each rung of the ladder by means of a U-shaped hooks. This device was intended for use by circus stunt performers | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / US Patent And Trademark Office |
Taille de l’image : | 3682 px × 4795 px |
Model Release : | Non requis |
Restrictions : | - |