During the 19th century American inventors sought patents on self-propelled road machines. This steam-driven mechanical contraption was conceived by Zadoc Dederick and Isaac Grass from Newark, New Jersey, who said, the pivots, cranks and connecting rods will produce an alternately-stepping motion. They were awarded a patent in 1868. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Source |
Bildgröße: | 4200 px × 2801 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |