US Patent: 6,719X
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Car Wheel
Wheels for Railroad Carriages
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Patentee:
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| James Stimpson (exact or similar names) - Baltimore, MD |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Aug. 23, 1831 |
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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. Only the patent drawing is available. This patent is in the database for reference only.
“For an improvement in the construction of Wheels for Rail-road Carriages; James Stimpson, city of Baltimore, Maryland, August 23.
It is observed in the specification that the side of a wheel to which a the flanch is attached, is much the strongest, whilst the opposite side is the most subjected to those accidents which tend to break the wheel; the improvement proposed is to strengthen this side of the rim by a ring of additional metal in the casting; and the patentee says he has no doubt that fifteen pounds of metal, forming such a ring will give more additional strength to the wheel, so as more effectually to protect it from breaking, than one hundred pounds equally distributed throughout the whole of the rim.
The claim is to the application of the rim, ring, or felloes, inside of the tread, or rim, or inner periphery of the wheels, opposite to the flanch (flange)."
Journal of the Franklin Institute, Vol. 13, Feb. 1832 pg. 124.
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