US Patent: 494,244
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| Pyrometer
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Patentee:
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| Edward Brown (exact or similar names) - Philadelphia, PA |
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Patent Dates:
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| Applied: |
May 26, 1891 |
| Granted: |
Mar. 28, 1893 |
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Jeff Joslin
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Description: |
| "Brown's Quick-acing Pyrometer" is featured in a 1908 catalog from the American Steam Gauge & Valve Mfg. Co. "This pyrometer is is designed to indicate a temperature over red heat such as is used in annealing ovens for malleable iron, or ovens for glass bending, where our hot-blast or stationary pyrometers would not be durable many weeks. This new pyrometer is inserted through the wall into the oven and will indicate the temperature up to white heat in fifteen or twenty seconds. It is then immediately withdrawn, and as soon as cold, which will take about twenty minutes, it may be used again." It cost $70 for a version measuring to 2000 degrees, or $75 for a version measuring to 3000 degrees. |
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