US Patent: 343,218
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| Fusible Plug
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Patentee:
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| William H. Bailey (exact or similar names) - Salford, Lancaster County, England |
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Patent Dates:
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| Applied: |
Apr. 12, 1886 |
| Granted: |
Jun. 08, 1886 |
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Patent Pictures:
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Joel Havens
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Description: |
| Abstract:
My invention relates to the plugs of fusible metal which are placed in the skins of boilers to or in the fire-boxes, so as to melt and allow the steam to escape when a dangerous heat is reached, my object being to insure the more complete and certain fusing of the metal of which the plug is composed: To effect this, I cover entirely and completely the fusible metal plug with a disk or cap of copper, brass, or other hard metal instead of, as at present, placing a small disk of hard metal in the center of the lug only and leaving the rest of the fusible metal exposed to the chemical action of the water, causing the formation of the scale.
Claim:
The combination of a safety-valve tube with a fusible metal disk closing the end thereof, an annular cap which holds said disk in place, and a protecting-plate which fits within said cap and over said fusible disk, and is attached to the latter, but free to be expelled by the steam when the fusible metal melts. |
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