US916474A

US916474A - Chimney-top.

Info

Publication number: US916474A
Application number: US46562108A
Authority: US
Inventors: Robert Edward Mulcahy
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-12-02
Filing date: 1908-12-02
Publication date: 1909-03-30
Anticipated expiration: 1926-03-30

Description

R. E. MULOAHY.

CHIMNEY TOP.

APPLICATION FILED use. 2. 190a Patented Mai 30, 1909. g/L'QZ?EETSHEET 1.

. INVE/WOR RQBERT EDWARD MuLcAHY.

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R. E. MULGAHY. CHIMNEY TOP.

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916,474. I Patented Mar. 30, 1909.

. IIVV RQBERT EDWARD MULCAHY,

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UNITED STATES PATENT ()FFICE.

ROBERT EDWARD iWIULGAI-IY, OF JERSEY CITY, NEW JERSEY.

CHIMNE Y-TOP.

To all whom it may concern:

Be it known that I, ROBERT EDWARD MUL- CAHY, a citizen of the United States of America, residing at Jersey City, in the county of Hudson, State of New Jersey, United States of America, have invented a new and useful Chimney-Top and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to chimney tops, or attachments for chimneys, whereby the entrance of rain may be prevented as well as the down-draft of smoke into the building.

According to the present improvements, the attachment has a hollow tubular body with a succession of deflectors arranged therein at difl'erent heights, and the body is provided, in its wall, with passages both above and below each deflector to the ox terior of the body. As the result of the use of such an attachment, any entering rain falls upon the upper surface of one or more of the deflectors and is led away by the passages aforesaid, smoke driven back by the outer air is deflected outwardly through said passages instead of returning to the flue, and air entering through said passages is turned upwardly and utilized to increase the outgoing draft at the upper end of the attachment, which is highly beneficial for ventilating and for carrying off smoke and gases.

Prior to my invention, chimney tops have been provided with a succession of defleetors the upper ends of which overlapped or nearly so a central horizontal axis of said chimney top, as shown in United States Patents Nos. 37,683, February 17, 1863, and 41,427, February 2, 1864, but said chimneytops had the passages in their walls only above the deflectors. It is a characteristic of my im rovement that there is a passage through t e wall of the chimney-top immediately below the deflector, as well as a passage through said wall immediately above said deflector.

A further characteristic of my present in vention. is found in the use of deflectors which are pivoted (as contrasted with those which are held in fixed position in the chimney-top) and are tilted by the wind or by a down=draf-t through the attachment.

In the accompanying drawings, Figure 1 is a side view showing.a chimney top embodying my present improvements; Fig. 2 is a vertical section thereof, on the line 2-2; Fig. 3 is a top view of one of the deflectors Specification of Letters Patent.

Application filed December 2, 1908.

Patented March 30, 1909.

Serial No. 465,621.

employed; Fig. 4 is a front View of the chimney top of Fig. 1; Fig. 5 1s a horizontal sectional View, from front to rear, also showing the top fitted to a chimney; and Fig. 6 is a section, at 66 of Fig. 1.

The improvements may be combined with a chimney in any suitable manner, being built therewith, or fitted thereinto, or, as especially shown in the drawings, fltted thereon as desired.

Referring to the particular embodiment of the invention shown in the drawings, A and A indicate opposite sides of a hollow tubular body, shown as being of one piece, and preferably made of terra cotta, earthemvare, or the like, molded to shape and baked. I preferably employ a square box-like body, open at its top and bottom, so as to have a continuous passage entirely therethrough; said box-like body may have a continuous flange X therearound, and which cooperates, with a reduced 01' thinned end Y to lit upon a chimney Z and register with the flue of the latter.

At its front A and rear A the body is provided with openings, and within said body there are a succession of deflectors B, B and B arranged at different heights. Preferably, as shown, the deflectors are lown wardly and outwardly inclined, and for the best results alternate deflectors incline in opposite directions. I have found it advantageous to use three deflectors, as shown, and to incline the intermediate deflector, B, in a direction opposite to that of the first and third deflectors, B and B of the series. As shown, I have also employed deflectors whose free upper ends slightly overlap, as shown at the dotted line 22 of Fig. l.

The said deflectors project through the openings referred to and for a considerable dis tance outside of the tubular body, and the deflectors thus provide passages C, C and C in the front and rear walls of the body immediately above the deflectors, and also passages D, D and D immediately below the deflectors. As stated, the deflectors project, for a considerable distance from the front and rear of the tubular body, and it will be obvious that aircurrents, blowing either toward the front or rear of the chimney top will strike the upper surfaces of the deflectors B and B or against the upper surface of the deflector B and be directed upwardly through the chimney. It will also be obvious that when smoke rises in the chimney top, it will strike against and be deflected downwardly by B and will pass outwardly through the passage D while some, perhaps the major part, of the smoke wifl be deflected upwardly by B to then strike the deflector B and be partly sent outwardly through passage D while the balance of the smoke will continue upwardly to be treated, in a similar manner, by the deflector B.

Examination of the drawings (Fig. 5, especially) will show that while air currents moving toward the front of the chimney top will prevent exit of smoke from the passage D yet such currents will be deflected upwardly by the upper surface of B to cause an increase of draft u wardly through the tubular body and to also drive smoke outwardly through the assage D it is plain that deflector B wil act, in like manner, upon air currents which move toward the rear of the chimney while, in such case, the deflector B will increase the draft upwardly through the chimney top. It will also be obvious that any wind or heavier air entering from the upper end of the chimney top, will strike against the upper surface or surfaces of the deflectors B and B and be thereby downwardly directed and the air or wind thus rushing from the assages C and C causes suction through t e passages D and D and draws the smoke therethrough, while smoke is also discharged through the passages C and D The deflectors may be combined in any desired manner (preferably reinovably, to permit easy and thorough cleaning of the tubular body and of the deflectors), and I have shown the deflectors B and B tiltably secured within the chimney top, while the deflector B is non-tiltably held in said top. In order to allow tilting of a deflector, it maybe rovided with axial projections G and G whidh are held in diagonally-disposed slots I-I, H while the upper end of the de flector rests within the fan-like recesses J upon the inner faces of the chimney top.

When a tiltable deflector is employed, it is especially useful upon the entrance of wind from the upper end of the tubular body. The extent of the tilting of a deflector may be noted in Fig. 5, which shows the deflector B in normal position, while deflector B is shown as fully tilted.

Hereinbefore, I have spoken of the action of air currents blowing to the front or to the back of the chimney top. It is highly desirable to prevent the entrance through passages D, D or D of air currents which blow against either side of the chimney top, and, to effect this, I have provided each deflector, at its opposite side edges, near its ends, with downwardly-projecting or depending portions E, E E preferably triangular in shape, which rest against or otherwise cooperate with the exterior of the chimney top, to support the deflectors and also to pro vide a barrier against air currents blowing against the sides of the chimney top.

I claim:

1. In a chimney top, a hollow tubular body and a succession of deflectors within said body and arranged at different heights, said deflectors being inclined in opposite directions outwardly and downwardly and with their upper ends normally overlapping, and said body provided with a passage above each deflector and with a passage immediately below each deflector.

2. In a chimney top, a hollow tubular body, an outwardly and downwardly inclined deflector tiltably supported within said body and a plurality of additional outwardly and downwardly inclined deflectors each at a level different from that firstnamed and having their up er ends normally overlapping, the tubular ody being provided with a passage above each deflector and with a passage immediately below each deflector.

8. In a chimney top, a hollow tubular body, a deflector tiltably supported within said body, constantly in an outwardly and downwardly inclined position, and the body provided with a passage above the deflector and with a passage immediately below said deflector, in combination with means for limiting the tilting movement of the deflector to maintain the same always outwardly and downwardly inclined, and to keep the passages above and below said deflector constantly open.

4. In a chimney top, a hollow tubular body, an outwardly and downwardly inclined deflector tiltably su ported within said body, and the tubular ody having recesses in its opposite side Walls to permit said deflector to move.

5. In a chimney top, a hollow tubular body, an outwardly and downwardly inclined deflector tiltably supported within said body and rovided with axial projections, said tubu ar body having slots for reception of said projection and with recesses in its opposite side walls to permit said deflector to move.

6. In a chimney top, a hollow tubular body and a succession of outwardly and downwardly inclined deflectors within said body and arranged therein at different heights, said body provided with a passage above each deflector and with a passage immediately below each deflector, each deflector projecting from one side of said body and at the exterior carrying flaps for preventing the entrance into the body of air currents moving toward the side edges of the deflectors.

7. In a chimney top, a hollow tubular 8. A deflector consisting of a plate of fireproof material carrying downwardly-projecting triangular pieces at the opposite side edges of said plate near one end thereof.

1n testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT EDWARD MULCAIIY.

body and a succession of outwardly and downwardly inclined. deflectors within said body and arranged therein at dii'lerent heights, said body provided with a passage above each deflector and with a passage immediately below each deflector, each deflector projecting from one side of said body, and means coacting with the deflector and with the side of the body to prevent the entrance into the latter of air currents moving toward the side edges of the deflectors.

Witnesses WVILLIAM P. VREELAND, BERNARD DRAOHMAN.