US Patent: 5,421X
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| Art of Building Chimneys, and Altering Those Already Build, in Such a Manner as to Prevent or Cure Their Smoking
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Patentee:
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| Almon H. Read (exact or similar names) - Montrose, Susquehanna County, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Apr. 03, 1829 |
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Joel Havens
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History of Susquehanna County-Almon H. Read Biography
Wikipedia entry for Almon Heath Read
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Description: |
| Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.
“Smoke is chiefly water in a state of vapour, mixed with carbureted hydrogen, rarefied nitrogen gas, and bituminous substances. The principal part of the water is furnished by the chemical combination of the hydrogen of the combustible body, with the oxygen of the atmospheric air of the room. Hence, the absolute necessity of taking into consideration the capacity of the room, in order to determine the size of the fire-place and flue. Again, the current through the fire-place and flue, is to be kept up, not only by the gases and vapour, above mentioned, but in part by the rarefaction of atmospheric air, let into the room by the occasional opening of the doors, &c., the whole of which is not decomposed by the process of combustion, but is continually escaping in a rarefied state, with the vapour and gases. Hence, in the second place, the necessity of ascertaining the capacity of the room, i. e. the quantity of cold air to be rarefied and expanded. I have discovered the due proportion between the capacity of the room and that of the fire-place and flue.
1st. The number of cubic feet contained in the room to be warmed, must be calculated.
2nd. The front opening of the fire-place must contain four-tenths the number of square inches that there are cubic feet in the room.
3d. The front opening of the fire-place must not be more than seven-tenths as high as it is wide.
4th. The horizontal section at the mantel (which I call the mouth) must contain two-tenths the number of square inches contained in the front opening, and must extend the whole width of the back.
5th. The throat must contain one-tenth the number of square inches contained in the front opening and must extend the whole width of the back.
6th. The throat must be, above the mouth, equal to one eighth the width of the front opening.
7th. The flue above the throat must be carried out, of the same capacity of the throat, varying the direction and shape as you please, but preserving the same number of square inches in every section thereof.
8th. The flue should be carried out separate from all other flues.
9th. The two last mentioned rules are to be observed in building new chimneys, but in altering old ones, generally, may be disregarded, without essential injury.
10th. If two fire-places of equal size are wanted in the same room, take one-half of the cubic feet as the capacity of the room, and in like proportion if three or more fire-places are required.
11th. The fire-place may be deep or shallow, the back may be perpendicular or otherwise, and the jambs may be at right, or any other, angle to the back, that suits the fancy.
What I claim as new and as my own discovery, in the above-described improved method of building chimneys, and for the use of which I ask an exclusive privilege, is, the application of the aforesaid principles to the building of chimneys, and also the first, second, third, fourth, fifth, sixth, seventh, and tenth rules or positions above mentioned.”
Journal of the Franklin Institute Vol. 4, Jul., 1829 pg. 58
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