Specification of Joseph Johnson and Joe Cliffe : furnaces.

  • Johnson, Joseph
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Joseph Johnson and Joe Cliffe : furnaces. Source: Wellcome Collection.

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    Johnson Cliffes Impts. in Furnaces, or in the Means of Consuming SmoJce. fire bridge by the pipe or channel/, which we prefer to construct of fire-clay, and attach to the under side of the boiler. This pipe or channel f communi¬ cates with the hollow annular space or arch g, g, which is furnished with holes or openings n, n, for the emission of the heated air among the combustible gases, 5 as already described in reference to Figures 6, 7, and 8. The atmospheric air may be admitted to the annular space or arch g by means of a pipe or channel e, e, along the bottom of the ash-pit; but we prefer the channel for the atmo¬ spheric air to be above the fire, when it can be conveniently so arranged. Having now described our improvements and the means of carrying the same ] 0 into effect, we would observe, in conclusion, that although we have described the best means with which we are at present acquainted for effecting the object of our improvements and adapting the same to three different constructions of boilers, yet we do not intend to confine ourselves to the precise arrangement or construction of parts herein shewn and described, as it will be evident to an 15 intelligent engineer that they may be varied without departing from the nature and object of our Invention. We would also observe, that in order that our improvements may be properly understood, we have found it necessary to show and describe various parts which have been heretofore known and in use for similar purposes. And we wish it to be understood that we do not mean or intend 20 to claim such parts as of our Invention ; but that what we consider to be new, and therefore wish to claim as the Invention secured to us by the herein-before * _ in part recited Letters Patent, is the heating of atmospheric air by introducing it into a chamber, pipe, or hollow arch situated either immediately over the dead plate or in any other convenient situation above the fire-place, or some 25 other part of the furnace where it may be exposed to a high temperature, and conducting such heated air to a perforated hollow arch or chamber near the fire-bridge, and allowing it to issue downwards from the under side of such arch or chamber and commingle with the gaseous products of the fuel, for the pur¬ pose of supplying them with a proper quantity of oxygen at a high temperature, 30 so that the combustible gases arising from the fuel may be properly consumed and the temperature thereof not materially reduced, as has been the case in most of the plans hitherto adopted for supplying air to the combustible gases. We claim particularly the employment of the perforated hollow arch above described, whether the same be used in combination with the above arrange¬ rs ments for heating the air or other plans that may be employed to effect the same purpose. And we also claim, in combination with the above, the use of a hollow fire¬ bridge placed behind the ordinary fire-bridge, and perforated-hollow arch or chamber, which hollow fire-bridge also receives a supply of heated air in the
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