Steam-hammer
Numéro d’image : 11639189
| llustration of a 19th century steam drop hammer shaping a forging. James Watt originally suggested the steam-hammer in 1784,but it was James Nasmyth (1808-1890) who developed it for practical use. A prolific designer of machine tools,he was asked in1839 to find a method of forging a large-diameter paddle-shaft for the steamship Great Britain and immediately devised his steam-hammer. Steam is injected into the overhead cylinder to raise the hammer which falls when the steam is allowed to escape. In a double-acting hammer,after the hammer has been raised,steam is injected above the cylinder piston to give a more powerful downward blow. The steam-hammer greatly increased the size of forging that was possible | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Terry, Sheila |
| Taille de l’image : | 4252 px × 4170 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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