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- Improvement in Hot-Air Engines, S. H. Roper, Specification Forming Part of Letters Patent No. 55,428, June 5, 1866 - Massachusetts machinist Sylvester Roper patented improvements to a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. This patent covers one of those improvements. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.
- June 05, 1866
- Collections - Artifact
Improvement in Hot-Air Engines, S. H. Roper, Specification Forming Part of Letters Patent No. 55,428, June 5, 1866
Massachusetts machinist Sylvester Roper patented improvements to a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. This patent covers one of those improvements. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.
- Improvement in Hot-Air Engines, S. H. Roper, Specification Forming Part of Letters Patent No. 34,723, March 18, 1862 - Massachusetts machinist Sylvester Roper patented improvements to a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. This patent covers one of those improvements. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.
- March 18, 1862
- Collections - Artifact
Improvement in Hot-Air Engines, S. H. Roper, Specification Forming Part of Letters Patent No. 34,723, March 18, 1862
Massachusetts machinist Sylvester Roper patented improvements to a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. This patent covers one of those improvements. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.
- Improvement in Hot-Air Engines, S. H. Roper, Specification Forming Part of Letters Patent No. 34,333, February 4, 1862 - Massachusetts machinist Sylvester Roper patented improvements to a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. This patent covers one of those improvements. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.
- February 04, 1862
- Collections - Artifact
Improvement in Hot-Air Engines, S. H. Roper, Specification Forming Part of Letters Patent No. 34,333, February 4, 1862
Massachusetts machinist Sylvester Roper patented improvements to a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. This patent covers one of those improvements. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.
- Improvement in Hot-Air Engines, S. H. Roper, Specification Forming Part of Letters Patent No. 38,866, June 9, 1863 - Massachusetts machinist Sylvester Roper patented improvements to a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. This patent covers one of those improvements. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.
- June 09, 1863
- Collections - Artifact
Improvement in Hot-Air Engines, S. H. Roper, Specification Forming Part of Letters Patent No. 38,866, June 9, 1863
Massachusetts machinist Sylvester Roper patented improvements to a hot air engine that produced motion by harnessing the expansion and contraction of warming and cooling air. This patent covers one of those improvements. Roper also built at least seven steam-powered carriages and two steam-powered motorcycles years before automobiles -- as we know them -- appeared.