US8167A - Ventilatoe - Google Patents

Description

` UNITED sTATEs PATENT oEEioE.

T. C'. HATCH, OF'SOUTI-I BRAINTREE, MASSACHUSETTS. e

VENTILATOR. i

Specicaton ofLetters Patent No. 8,167, dated June 17, 1851.

. such parts as I claim and desire to have secured to me by Letters Patent. y.

My new ventilator is so arranged, that from whatever quarter vthe wind blows,none can blow down the chimney or whatever otheroriice the ventilator may be attached to, but on the contrary the draft is increased, while, at the same time,` it eifectually prevents all rain etc. from entering.

My improved i ventilator is constructed with two series or sets of slats arranged one within the other, thespaces left between the outer slats bein occupied `by those of the inner set, andtie edges of the outer slatsV extending a little over those of the inner ones, leaving a space or opening sidewise be'- tween the two. These several slats are bent or curved into aconical orglobular form, both sets approaching a small circle over the center of the flue. The wind, asit impinges upon the oblique and curved slats, is thrown olf in all directions, thus tending to draw off thestill air from the flue and producing a partial vacuum between the slats, and, by the curved form of these slatsthe wind is thrown olf in an upward as well as sidewise direction, thus drawing off the air from the Hue in the most natural manner, namely, upward.

`My improvements are represented in the accompanying plate of drawings. e

Figure 1 is a plan or top view of my improved ventilator." Fig. 2 is a vertical section taken in the plane of the line B, Fig. l.

a a a 0L` in the drawings represents `the chimney on which the ventilator is placed. i

b, etc., are the outer slats running from near the edge of the chimney to the small circle or plate cion the top of the ventilator, these slats being curved as shown in the drawings.

d, d, etc., are the inner slats, shown in Fig. y

2 and by dotted lines in Fig. 1, running to thesame circle o and being curved in the `same manner as the outer slats; but they do not run so near to the outer edge of the chimney as the slats b, and consequently leave the aperture or spaces f, f, etc., between theinner` and outer slats. The inner slats d, d, etc., are so placed as to occupy the spaces left between the several outer slats,

and, as the edges of the exterior slats lap or project over those of the inner slats, no wind can be blown into the flue or orifice, the only openings being in an oblique or sidewise direction. i

It will be seen that the globular form or curve given to theslats, tends to diffuse the air in all directions and particularly upward, thereby having a greater tendency to produce a vacuum and consequently to increase the draft, than if they were arranged in an upright or any otherposition.

Having thus described my improvements in ventilators, I shall state my claim as follows.- M

What I claim as my invention and desire to have secured to me by Letters Patent is,

A ventilator, as herein above described, composedof two series or sets of curved slats, arranged one within theother, and

runningfrom the edge of the flue or other orifice to a small circle or plate over the center of the same, the whole forming a `conical or globe shaped ventilator. the spaces between the several outer slats, being protected by the innerslats, leaving spaces or apertures` between the two sets of slats,

` the only openings to said apertures being in an oblique or sidewise direction, all as here in above described and set forth.

e THATCHER o. HATCH. Witnesses: i `J. F. DEARBORN,

`SHUEART Gr. EDMoNDs.

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