Specification of rear admiral Sir Henry Hart : apparatus for ventilating chimnies.

  • Hart, Henry, Sir.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of rear admiral Sir Henry Hart : apparatus for ventilating chimnies. Source: Wellcome Collection.

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    Hart's Improvements in Apparatus for Preventing SmoJcey Chimnies. » - NOW KNOW YE, that in compliance with the said proviso, I, the said Sir Henry Hart, do hereby declare that the nature of my said Invention, and the manner in which the same is to be performed, are fully described and ascertained in and by the following statement thereof, reference being had td the Drawing hereunto annexed, and to the figures and letters marked thereon, that is to say:— My Invention consists of employing a wheel, put in motion by the wind, so as to cause the air to be withdrawn from a chimney or flue, the wheel being caused to move into position by an arrow or vane. And in order that my Invention may be most fully understood and readily carried into effect, I will proceed to describe the means pursued by me. 5 10 Description of the Drawing. I ii Figure 1 shows an apparatus combined according to my Invention. Figure* 2 is a section thereof, a is a wheel, moving on an axis b, which is horizontal^ or as nearly so as may be ; part of the wheel rises above the chimney pot, so 15 that the wind in passing may act on the upper floats, and cause the wheel to rotate, and the wheel will be caused to come before the wind by the aid of the arrow c or other suitable vane, the upper part of the chimney pot turning on a vertical axis, as is well understood, d is a projecting guard, to prevent the wind being forced down the chimney. 20 Figure 3 shows another arrangement, somewhat differing from the preceding. Figure 4 shews a section of the same. In this arrangement there is , an opening at the side of the rotating portion of the pot, the upper part of the wheel being covered, the wind in this case acting on the under portion of the wheel, and driving it round, as indicated. In this arrangement, c is a top to prevent down 25 drafts when the chimney is in a low position, surrounded by higher buildings; but I have not had the upper plate e, when on chimnies, otherwise circum¬ stanced. Figure 5 shows another arrangement, also somewhat differing from the preceding. Figure 6 shows a section thereof. In this arrangement the wind acts on the upper part of die wheel, as indicated. It may be remarked, 30 that when there is no fire the working of the apparatus will tend to keep an upward draft in the chimney, and thus ventilate the apartment with which the chimney communicates. Having thus described the nature of my Invention, and the manner in which ; the same is to be performed,' I would have it understood that I do not confine 35 •f s shown, so long as the peculiar character of my Invention^ be retained: but what I claim is, the employment of a wheel put in motion • * ii *-