US1366365A - Attachment for oil-stoves - Google Patents

Description

T J. R. DONNELLY.

ATTACHMENT FOR OIL STOVES. APPLICATION FILED AUG-18, 1919.

3 365. Patented Jan. 25, 1921.

v UNITED STATES PATENT OFFICE.

JOHN B. DONNELLY, O1 FAIRFIELD, MAINE, ASSIGNOB OI ONE-HALF TO DANIEL 1B. DONNELLY, 0F FAIRFIELD, MAINE.

ATTACHMENT FOR QIL-STOVES.

Specification of Letters Patent.

Application filed August 18, 1919. Serial m. 318,109.

To all whom it may concern: 4

Be it known that I, JOHN R. DONNELLY, a-citizen of the United States, residing at Fairfield, in the county-of Somerset and State of Maine, have invented certain new the ordmary commercial oil stove are sepa;

rated by a considerable space, which allows free access of the outside air and which has a very considerable cooling effect upon the heated.

The diameter oft e opening at the top of the chimney is very much less than the diameter of the grate and the heat arising from the chimney is concentrated more or less within a limited space and is not properly distributed over the bottom of the vessel or other article to be heated.

The object of my invention is, first, to prevent the free access of the outside air to j the space beneath the vessel and, secondly,

to eiiect the even distribution of the heated air and gases arisin from the chimney of the stove, whereby t e heating efiect of the stove is greatly accentuated.

In carrying out my invention, I interpose between the grate and the top of the chimney an annu ar shield which is preferably made with an upwardly flaring formation, the outer diameter of said shield being substantially that of the grate or stove opening and the inner diameter being slightly greater than that ofthe chimney opening.

This construction is made more efiective by uniting with it a flanged or flaring guard surrounding the top of the chimney and separated from the shield by an annular' vent or air opening.

This attachment is peferably formed to fit the ordinary commercial blue flame stove and results in the increased efficiency of such stoves.

I have illustrated in the accompanying slightly larger than the openin drawing an attachment constructed accordmg to my 1m ention, applied to the ordi-- nary Perfection oil stove, so called.

In the drawing:

Figure 1 is a section on the line 1-1 of 2, and

1g. 2 is a plan of the device.

2 represents the flat top of the oil stove contaming the opening 3, 4 is the chimney havlng the contracted openin 5, and 6 is the ate upon which is placed the article to be eated.

These parts are all common to the commercial oil stove and formnopart of my invention. The shield 7 is preferably an annular castin the outer diameter being substantially t at of the grate so that it rests upon the edge of the stove opening 3 and the upper portion is hollowed out so that the grate 6 rests on it in the same relative position as it rests on the stove opening.

The inner diameter of the shield 7 is I 5 in the top of the c imney and the shie d is made with an upwardly flarin form which is slightly curved, or cup s aped, leaving a fiat, slightly tapering space beneath the grate.

The chimney is protected from currents of air by a cylindrical uard 8 havin' at its up er edge an outwar ly extending ange 9.

he guard 8 fits closely around the upper end of the chimney, extendin somewhat above the same and it is suspen ed from 'the shield 7 by hangers 10, which are preferably formed integral with the casting 7 and secured by suitable bolts 11 to the inner surface of the guard 8.

The effect of this attachment is to spread and evenly distribute the column of heated air and gases which rise through the opening 5- and also to protect the bott'om'of the grate and any vessel or article placed thereon to be heated, from the inrush of cold air which would otherwise mingle with the ascending column of heated air and gas.

The upper end of the chimney is also protected from the efiect of lateral drafts of air Patented Jan. 25, 1921.

which would otherwise have a disturbing upward flow of hot is checked or smothered, this annular space furnishes a vent by which the excess gases flow .ofi' around the sides of theburner and reheves any back pressure within the chimney.

An attachment constructed as above described has the efi'ect of making the oil stove far more efficient than when used without it,

by concentrating the heat, distributing the same, and by preventing the cooling efiect of the exterior a1r.

I claim:

1. An oil stove having a chimney, a grate above said chimney, an upwardly spreading annular shield interposed between the grate and chimney adjacent to the grate and an annular guard surroundingthe to of the chimney, its u per edge ing 0 greater diameter than t e lower ed e of said shield and spaced from said shiel to form an annular upwardly and outwardly extending venting space.

2. An oil stove having a chimney, a grate above said chimney, an upwardly spreading annular shield interposed between the grate and chimney adjacent to the grate and an annular guard suspended from said grate surrounding the to of the chimney, its upper edge being 0 greater diameter than the lower ed of said shield and spaced from said sh1eld to form an annular upgrate fitting in said shield, a chimney, an

annular chimney guard suspended from said shield and fitting over the upper end of said chimney, leaving an upwardly and outwardly flaring venting space between said guard and shleld.

5. An oil stove having a grate opening, an upwardly flaring annular shield fitting 1n said opening, a grate above said shield, a

chimney, a chimney guard having an annu larfiange suspended from said shield and fitting over the rig-per end of said chimney leaving an upwar venting space between said shield and gua In testimony whereof I have vaiiixedmy signature, 1n presence of two witnesses.

JOHN R. DONNELLY. Witnesses:

W. S. SIMPsoN, L. F. N

y and outwardly flarin

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