US Patent: 200,119
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| Improvement in Safety-Valves
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Patentee:
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| Henry G. Ashton (exact or similar names) - Somerville, MA |
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Patent Dates:
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| Applied: |
Dec. 04, 1877 |
| Granted: |
Feb. 12, 1878 |
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Joel Havens
"Vintage Machinery" entry for Ashton Valve Co.
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Description: |
| This patent covers the "Ashton Pop-Valve". An 1890 lawsuit, Ashton Valve Co. v. Coale Muffler & Safety Valve Co., involved this patent as well as patent 299,503. From the Patent Office report this patent is "for an improvement in safety valves, consisting substantially of an ordinary spring valve with a pop-valve chamber added, in combination with a valve-seat, an inclosed spring chamber, and an inclosed discharge chamber. In his specifications he states that his combination was very important 'in all cases where the steam is prevented in any way from escaping freely from the hood or casing, as is often the case.' In another place he states that he provides holes or vents in the spring chamber for the escape of such steams as may enter it, but these vents are not mentioned in the claims, which cover merely the above combination, 'arranged to operate as described.' Held, that the patent did not cover the use of the vent holes. 50 Fed. Rep. 100, affirmed." |
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