US1627867A - Stump burner - Google Patents

Description

1,627,867 M 1927 H. L. REYNOLDS STUMP BURNER Filed Aug. 22, 1922 M WW 20 50 Egg: 2.

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wfww Patented May 10, 1927.

UNITED STATES HENRY L. REYNOLDS, or SEATTLE, WASHINGTON.

STUMP BURNER.

Application filed August 22, 1922; Serial 1V0. 583,485.

The object of my invention is to produce a stump burner operable under the same principles of combustion as that employed in the stump burner shown in the patent to Clark Smith, No. 1,065,738, issued June 24, 191?), but of a simpler and improved type of construction and particularly in providing means for supplying fuel for'ignition purposes after starting operations.

My invention consists of an improved and simplified type of construction which reduces the weight and first cost of the apparatus, contributes to the ease ofhandling the same and facilitates the operation of the device particularly in reducing the trouble and attention incurred ingetting' the fire properly started in the stump.

My invention consists of the novel parts and combinations of parts which will be hereinafter described and particularly pointed. outin the claim.

The accompanying drawingsillustrate constructions embodying my improvements in a practical form. These drawings show preferred form of construction.

Figure 1 is a longitudinal section of a burner as applied to a stump to start opera tions.

Figure 2 is an outer end elevation and, Figure 3 a plan view of the burner.

The central idea of stump burners operating on the principles of combustion used by me is the enclosure of a section of the face of the stump, building a fire against this enclosed face and supplying the air for combustion solely through a blast pipe the discharge end of which is at the face of the stump within the enclosed area, whereby, the face of the stump will be ignited and by advancing the discharge end of the blast pipe as the stum burns away, a hole may be burned into the heart'of the stump thus using the outer walls of the stump to enclose the fire and retain the heat.

The burner base is in the form of a casing having an open end or face adapted to be placed against a face of a stump to enclose a limited area thereof. It has means for attaching a smoke stack thereto,-for inserting a blast pipe and for feedlng fuel thereto when and if this be necessary.

The casing 1 may be of arched or lnverted U-shape or of substantially any other cross sectional shape which provides a satisfactory furnace or fire chamber 10. Thls chamber may, but need not, be closed upon 1ts bottom side. I prefer to leave the bottom side open as the burner will rest upon the ground and the ground will close the lower side.

The casing has a flange 11, or other equivalent means whereby connection may be made with a smoke stack 2. A damper in the stack may be used to control the draft.

At its face 13 opposite to that which is placed next to the stump, an opening 14 is left which is at least of suflicien't size to admit the air blast pipe 7. This entire end may be left open and its closure secured by the use of a separate plate 4, which plate has a not-ch in its lower" edge sufficient to receive the air blast pipe.

Towards the end which is placed against the face of the stump, means are provided for introducing fuel as needed: when igniting the stump. When wood is relied upon as the fire kindling fuel, this takes the form of opening 12, registering with which is placed a short section of pipe 5 to serve as a fuel feedinghopper and also to maintain a passage through the covering earth through which to introduce the additional fuel supply. A cap will close this when fuel is not being inserted. As this extends upwardly the fuel will feed down by grav- 35 ity. This places the fuel at the face of the stump where needed.

To strengthen the casting flanges 15 and 16 may be used.

marginal The fuel used may be any convenient and suitable combustible. Charcoal makes an excellent fire kindling material when available. Dry wood cut to suitable size is very satisfactory. The supply of such fuel is not necessary after the ignition of the stump face.

The principle of operation of this device is the ignition of the face of the stump by using other fuel burnt within a closed chamber, inducing a draft by using a smoke stack ing fuel and also the manipulation of the 119 air blast pipe.

In operating such a device the point of accordance with the principles of char-pitting. The free exposure of the cavity in the stump to outside air should be avoided by providing an external covering when the fire breaks through the walls. Tight joints are to be secured by the use of earth or wet clay. In stump burners of this type where no means are provided for convenient replenishing of the fuel needed to thoroughly establish the fire in the stump, it has been necessary to make the furnace chamber quite large to thereby provide sufficient room to hold enough fuel to last long enough to get the stump well on fire, which size adds to its weight, both because of its increased size and because increase in size necessitated increase in thickness to secure needed strength.

It has been found by experience that to insure proper ignition of the stump, even if the furnace chamber be made quite large, it is necessary to supply other fuel than that which may be placed therein on starting. It is also desirable to keep the enclosed area of the stump face as small as possible, thus keeping the diameter of the outer end of the hole burnt in the stump as small as possible. To keep this area small and supply enough fuel to ignite the stump it is necessary to provide means for replenishing the fuel. This burner is believed to be the first which has satisfactorily met these conditions.

WVhat I claim as my invention is:

A stump burner comprising a furnace casing having one end open to be placed against the face of the stump to be burned and an opening at the opposite end for the accommodation with the first named opening of an air blast pipe, an air blastpipe adapted to pass through both said openings and movable lengthwise to maintain its discharge face close to the burning face of the stump, said furnace casing having'an opening in its top for a stack connection and a. separate fuel feed opening between the stack connection and the end of the casing which is placed against the stump, a draft stack and a feeding hopper for solid fuel adapted to be connected with their respective openings in the casing to thereby insure an efiective ignition of the body of the stump.

Signed at Seattle, King County, Washington, this 16th day of August 1922.

HENRY L. REYNOLDS.

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