US555761A - Chimney-cowl - Google Patents

Description

(No Model.) 5

- J. M. DE LANOY.

CHIMNEY GOWL. I No. 555,761. Patented Mar; 3, 1896.

m M u lmmrm NlTED STATES PATENT OFFICE.

JOHN M. DE LANOY, OF TARRYTOVN, NEWV YORK.

CHIMNEY-COWL.

SPECIFICATION forming part of Letters Patent No. 555,761, dated March 3, 1896. I Application filed June 20, 1895. Serial No. 553,458. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN M. DE LANOY, of Tarrytown, in the county of Westchester and State of New York, have invented a new and Improved Chimney-Cowl, of which the following is a full, clear, and exact description.

This invention relates to certain improvements in chimney coWls or caps, such as are employed to facilitate the draft through a chimney; and the object of the invention is to provide a device of this character of a simple and inexpensive construction, which shall be adapted not only to facilitate the draft through the chimney, but which shall also serve to prevent the wind from blowing down the chimney so as to interfere with the draft therethrough, the device being so constructed and arranged that should a vertical air-current strike the same either from above or below the draft through the chimney will be facilitated.

Theinvention consists in a chimney cowl or cap having a base portion adapted to be set on a chimney, and having a draft-pipe extending upward therefrom and provided with a coned hood arranged over its upper end, and having a reversely-coned hood secured below its upper end, with its lower edge spaced away from said pipeand its upper edge opposite the lower edge of the upper hood or cone, and an annular casing inclosing said hoods.

The invention also contemplates certain novel features of construction and combinations and arrangements of the parts of the improved chimney cap or cowl, whereby certain important advantages are attained, and the device is made simpler and better adapted for use than other similar devices heretofore employed, all as will be hereinafter fully set forth.

The novel features of the invention will be carefully defined in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation showing my llllproved chimney cowl or cap in its preferred form, and Fig. 2 is a vertical section taken axially through the same to show the construction of the device. Fig. 3 is a plan view of the device,and Fig. 4 is a perspective fragmentary detail view showing the means for securin g the upper cone or hood to the draftpipe.

As shown in the views, the chimney cowl or cap is constructed with a conical base portion or shell 1 of sheet metal adapted to be secured on the chimney-top, from the upper end of which shell leads a vertical draft-pipe 2 of a length adapted when the cowl or cap is in place on the chimney to give the desired increase in the draft therethrough. At its upper end the draftpipe 2 is provided with an annular series of circular apertures 3, and in its upper edge said pipe is provided, as seen in Figs. 2 and 4:, with a series of parallel slots 4, so as to form between said slots tongues or projections the extremities of which are bent outward at right angles to the sides of said draft-pipe 2, as clearly indicated at 5 in the drawings.

On the upper end of the draft-pipe 2 is secured a conical shell or hood 6 of sheet metal, bent to form and of a diameter somewhat greater than the diameter of said draft-pipe 2, whereby the edge of said hood projects down beyond and surrounds the upper end of the draft-pipe, as seen in Fig. 2, and said hood or shell 6is secured in place on the draftpipe 2 by means of rivets or equivalent fastenin g devices set through the bent ends 5 of the tongues at the upper end of said draftpipe.

A flat cap-plate 7 of circular form is arranged over the upper end of the draft-pipe 2, between the hood or shell and said draftpipe, in order to prevent the formation of eddy-currents in the central conical portion of said hood, whereby the free escape of the smoke from the draft-pipe would be interfered with, and in order to hold the said cap plate 7 in place the same is provided with bent edge portions 13 adapted to be held between the underside of the hood 6 and the bent ends 5 of the tongues on the draft-pipe by means of the rivets passing through said parts. The lower hood or shell, 10, is also of conical form, being made from sheet metal and having both ends open, its lower end being of somewhat larger diameter than the draft-pipe 2 which it encircles, and being supported on said draft-pipe by means of angular braces 9 or the like, held in place by rivets, and the upper edge of said shell or hood 10 is of substantially equal diameter to the lower edge of the upper hood, 6, and is spaced away therefrom, as clearly seen in the drawlngs.

The two shells 6 and 10 are surrounded by a hood of annular form, comprising an upper straight portion, 13, and a lower coned portion, 12, said hood being of greater diameter than said shells, so as to leave an air-channel between the parts, and being held in place by means of angular braces or brackets 11 secured to the lower shell, 10.

In operation when the device is in place on the chimney in case an air-current should strike-the cap or cowl from either side said air-current will be deflected by the encircling hood, so as to be prevented from blowing down the chimney, and will act to draw the smoke escaping by way of the apertures 3 and 4 in the draft-pipe along with it, so as to increase the draft in the chimney. Should a descending air-current strike the cowl from above, it will be deflected by the upper shell or cone, 6, and caused to pass through the annular space between the upper and lower shells, 6 and 10, and the encircling hood, so as to also act to facilitate and increase the draft through the chimney, and should an ascending air-current strike the device from below this will be deflected by the lower shell, 10, so as to act to suck or draw the smoke from the draft-pipe in a similar manner.

The construction of the device as above set forth is extremely simple, inexpensive and durable and affords an effective means for curing smoky chimneys, being adapted, no matter in what direction the wind is blowing, to draw the smoke out of the draft-pipe. Moreover, the cap 7 prevents the formation of eddy-currents in the draft-pipe, and also acts to prevent the collection of soot, &c., therein, since the smoke is discharged through the apertures immediately on reaching the upper end of the draft-pipe.

It will be evident from the above description that some change and modification may be made in the construction and arrangement of the improved chimney cowl or cap without material departure from the principles of the invention, and for this reason I do not wish to be understood as limiting myself to the precise form of the device herein shown and described.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a chimney-cap, the combination of a draft-pipe, two shells secured at the upper end thereof, said shells being reversely coned and being arranged with their larger ends adjacent, the upper shell being secured directly to the upper end of the draft-pipe and the lower shell having its lower end open and arranged around and of a larger diameter than the draft-pipe, and an annular hood arranged to encircle said shells and of larger diameter than the same, substantially as set forth.

2. In a chimney-cap, the combination with a draft-pipe having perforations at its upper end, of a conical shell or hood secured to the upper end of the pipe and closing said end, an inverted conical shell secured to the pipe below the perforations thereof, the lower end of the said inverted conical shell being of greater diameter than the draft-pipe and an annular hood of larger diameter than the shells and surrounding the same, substantially as described. I

3. In a chimney-cap, the combination of a draft-pipe having perforations at its upper end, an upper conical shell secured over the upper end of the draft-pipe above the perforations therein, with its lower end extending below the upper end thereof, a lower conical shell having its ends open, and having its larger open end uppermost and spaced away from and of equal diameter to the lower edge of the upper shell, and its lower edge of larger diameter than the draft-pipe and surround ing the same below the perforations therein, braces for securing the lower shell to the draft-pipe, an annular hood of larger diameter than and arranged to encircle said shells, and comprising a straight upper portion and a conical lower portion, and braces securing said hood to the lower shell, substantially as set forth.

JOHN M. DE LANOY.

lVitnesses:

CYRUS A. BIsHor, JOHN J. SINNoTT.

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