| US Patent: 11,492 
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| Stone-dressing machine | 
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| Patentee: |  |
 | Charles T. Porter (exact or similar names) - New York, NY |  
 
| USPTO Classifications: |  | 125/6 |  
 
 
 
 
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| Patent Dates: |  
| Granted: | Aug. 08, 1854 |  USPTO (New site tip)
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                        Jeff Joslin
 Vintage Machinery entry for Charles. T. Porter; Porter-Allen Engine Co.
 
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| Description: |  | Improvements to Elbridge G. Hastings' patent 10,636. Charles T. Porter was a lawyer who was hired by Hastings, and Hastings ended up giving Porter a half-interest in patent 10,636 as payment for services. Porter, who had no prior training or experience as a mechanic, realized that Hastings' design had some good ideas but was not yet practical. Porter learned mechanics and technical drawing on the fly and then made improvements to Hastings' design; this patent is the result. Porter then discovered that their stone-dressing machine was producing a rippled surface due to the poor speed regulation of the steam engine driving the machine; Porter went on to design a new steam-engine governor, patent 20,894. Porter would become the most important designer in the emerging field of high-speed steam engines. |  |