US Patent: 331,093
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| Boiler Tube Scraper
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Patentee:
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| Azel B. Smith (exact or similar names) - Lowell, Middlesex County, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 15, 1885 |
| Granted: |
Nov. 24, 1885 |
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Patent Pictures:
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Joel Havens
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Description: |
| Abstract:
My invention relates to that class of tube-scrapers where there are several scraping-edges held in contact with the periphery of the tube by springs, the whole device being fastened upon the end of a long rod, so that it may be thrust through the entire length of the boiler-tube, carrying the dust and soot before it.
Claim:
In a boiler-tube scraper, the combination of the pair of radially-grooved heads with pairs of scraping-sections supported by the said heads, a central spindle provided with apertures at right angles to its axis, and spiral springs supported in the said apertures, each of the said springs acting upon a pair of the said scraping-sections to force them in opposite directions. |
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