US Patent: 5,560X
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| Pumps for Ships
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Patentee:
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| Manuel Francis (exact or similar names) - Boston, Suffolk County, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jul. 07, 1829 |
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Joel Havens
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Description: |
| "The patentee begins by telling us, my invention consists in the application of a windlass, and a train of multiplying wheels and pinions, so constructed as to work a pump by the power of a weight applied to the windlass, or barrel. Need we tell any thing more about the invention? Certainly not to one who has passed the "poms assinorum" (the point at which many learners fail, especially a theory or formula that is difficult to grasp.) in mechanics., There are three wheels, working in three pinions, each increasing the motion about threefold. The last pinion carries the pitman, or shackle-bar, which is to work the pump. A ratchet wheel and click is attached to the barrel upon which the rope sustaining the weight is to be wound. A balance wheel proportioned to the moving power, is attached to the arbor of the crank.
The hope to obtain an increase of the effective power of a machine, whilst the motive power remains unchanged, results from a total ignorance of what is meant by the quantity of motion, and this ignorance is the parent of most of the absurd propositions which are made in mechanics. In the example before us, besides this error, there would be a loss of about one-third of the power applied from the friction of wheels and gudgeons, and the rigidity of cords." (From the Journal of the Franklin Institute, Oct. 1829, pg. 251.)
Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only. |
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