US Patent: 5,646X
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Drawing Water From Forebays and Discharging on Water Wheels
Manner of Drawing Water From Forebays, and Discharging It on Water-Wheels
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Patentees:
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| J. P. Espy (exact or similar names) - Philadelphia, PA |
| Andrew Young (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Sep. 11, 1829 |
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Joel Havens
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Description: |
| 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.
For an improvement in the manner of Drawing Water through Forebays, to be discharged on water wheels; James P. Espy and Andrew Young, Philadelphia, September 11.
Men of science are aware that experiments to ascertain the effect of tubes of different forms upon effluent water, have been performed by Venturi, and others, and that some very remarkable results were obtained. The tubes, or openings employed, are called adjutages. At page 280 of the present volume there will be found an investigation of this subject by Mr. Charles Potts; the facts are also noticed in all modern works which treat upon the subject of hydraulics.
The patentees state expressly that their improvement consists in applying Venturi's adjutages, and thereby increasing the quantity of water discharged through a given opening, under a given head, and thus increasing the power of the wheel.
We are not aware that the question has ever been decided whether a claim of this kind is good in law. Patentable objects are any useful art, machine, manufacture, or composition of matter, not known, or used before the application; or any improvement upon either of them; the main question therefore is, whether the application of a well known principle in the production of a well-known effect, can be arranged under either of the foregoing heads.
The advantage to be derived by the application of the adjutage in question is to the tenant, or purchaser, of a water right, who is allowed, by his agreement, to draw a given number of inches of water under a given head; by adopting an adjutage somewhat in the form of that given in fig. 7. p. 282, this quantity will be greatly increased.”
Journal of the Franklin Institute Vol. 9, Dec. 1829 pg. 408
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