US1943218A

US1943218A - Weed burner

Info

Publication number: US1943218A
Application number: US581449A
Authority: US
Inventors: Greger E Guttormson
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-12-16
Filing date: 1931-12-16
Publication date: 1934-01-09
Anticipated expiration: 1951-01-09

Description

1934- G. E. GUTTORMSON I 1,943,218

WEED BURNER Filed Dec. 16, 1931 4 Sheets-Sheet l m W a ATTORNEYS Jan. 9, E. GUTTORMSQN WEED BURNER Filed Dec. 16, 1931 4Sheets-Sheet 2 abi'uffoflmwanj INVENTOR ATTORNEYS Jan. 9, 1934.

G. E. GUTTORMSON WEED BURNER Filed Dec. 16, 1931 4 Sheets-Sheet 3 4 Q m w s \3 I I M Q N a K\ N fzfuttormfwz,

ATTORNEVS WEED BURNER Filed Dec. 16, 1931 4 Sheets-Sheet 4 -II II INVENTOR BY 4 5M ATTORNEYS Patented Jan. 9, 1934 warren STATES,

WEED BURNER Greger E. Guttormson, Fort Ransom, N. Dak.

Application December'1 6, 1931 Serial No. 581,449

4 Claims. (01. 126-2713) This invention relates to a weed burning machine and it consists in the novel features hereinafter described and claimed.

' An object of the invention is to provide a machine of the character stated designed to burn straw or similar material in an especially constructed fire box the flame of the ignited fuel beingdirected towards the ground by drafts of air created by a rotating fan located above the fire box of the machine. The machine is mounted upon wheels and is provided with a rack adapted to hold the straw.

An object of the invention is to provide'a machine of the character stated adapted to be efficiently used for burning and destroying noxious weeds along public highways, in fields and at other places and adapted to use a cheap and handy fuel material for burning the weeds.

In the accompanying drawings:--

Figure l is a side elevational view of the weed burner and associated vehicular apparatus.

Figure 2 is an enlarged central longitudinal vertical sectional view of the weed burner and adjacent portion of the platform.

- Figure 3 is a horizontal sectional view on the line 33 of Figure 2.

Figure 4 is a transverse sectional line 4-4 of Figure 5.

Figure is a horizontal sectional view on the line 5-5 of Figure 2.

Figure 6 is a detailed sectional view on the line 6-6 of Figure 2.

The weed burner includes a platform 1 mounted at one end upon supporting wheels 2 and having view on the a rack 3 mounted upon its forward end. The rear portion of the platform is supported upon a U-shaped axle 4 and ground engaging wheels 5 are journaled for rotation at the ends of the axle '4. A hexagonal extension 6 is provided upon the hub of one of the wheels 5 and sprocket wheels 7 and 8 are mounted upon the said extension. A counter shaft 9 is journaled for rotation above the sprocket wheels '7 and 8 and clutch members 10 and 11 provided with sprocket wheels are loosely journaled upon the said counter shaft. Chains l2 and 13 are trained around the sprocket wheels 7 and 8, respectively, and the sprocket wheels of the clutch members 10 and 11. Tension rollers 14 and 14' are journaled upon-brackets provided upon the frame of the machine and bear against the sides of the chains 12 and 13 and keep the said chains at proper tension. A double clutch member 15 is mounted upon the counter shaft 9 between the clutch members 10 and 11 and a lever mechanism 16 is provided for throwing either one of the clutch members 10 or 11 into engagement with the clutch 15.. Thus means are provided for imparting rotary movement to the counter shaft 9 at two rates of speed. A shaft 17 is journaled for rotation above the counter shaft 9 and carries a gear wheel 18 which meshes with a gear wheel "19 mounted upon the counter shaft. A worm wheel 20 is loosely mounted upon the shaft 17 and is provided with a clutch hub 21 which is engaged by a spring pressed clutch member 22 mounted upon the. shaft 17.

' A combustion chamber 23 is mounted upon the platform 1 at a point below the shaft 17 and is provided with an inlet chute 24 having a door '25 pivotally mounted therein for swinging movement. Under normal conditions the door 25 hangs vertically as shown in Figure 3 of the drawings. A fire box 26 is located below the combustion chamber 23 at a point immediately behind the chute 24. The lower ends of air pipes 27 enter the fire box 26 through the bottom thereof and in the vicinity of the ends thereof and the upper ends of the pipes 27 pass through the top of the combustion chamber 23. Grate bars 28 extend downwardly and rearwardly from the rear side of the fire box 26 and the bars 28 are provided at their rear ends with upstanding spaced fingers 29. Each alternate finger 29 is of a certain height and the intervening fingers are less. in height so that the said fingers will readily engage the straw which passes through the combustion chamber as hereinafter described. The rear ends of the grate bars 28 are supported upon a lip plate 30 whichiis attached at its ends to the frame of the platform and which is curved in plan. The rear side wall 31 of thecombu'stion chamber is downwardly and rearwardly sloped toward the lip plate 30 but the lower edgeof the said wall is spaced above the upper surface of the lip plate. A series of nozzles 32 pass through the top wall of the combustion chamber and the discharge ends of the nozzles 32 are directed downwardly and rearwardly towards the space between the lower edge of the wall 31 of the combustion chamber and the upper surface of the lip plate 30. A damper plate 33 is slidably mounted upon the upper surface of the top wall of the combustion chamber 23 and a rod 34 is'attached at its rear end to the said damper plate and may be used for moving the damper I plate over the upper ends of the nozzles 32 whereby the volume of air which passes through the said nozzles may be regulated. Stacks are mounted upon the top wall of the combustion chamber 23 and communicate at their lower ends with the interior thereof. A fan drum 36 is mounted upon the top wall of the combustion chamber 23 and is provided at its rear side with a series of openings 3'7. A ring 38 is mounted for turning movement on the drum 36 and is provided with openings 39 which may be brought into register with the openings 37 so that air may pass from the interior of the drum through the said openings over the rear part of the top of the combustion chamber 23. A shaft 40 enters the drum 36 through the top thereof and is surrounded by an opening 41 in the top of the drum. Fan blades 42 are housed in the drum and are carried at the lower end of the shaft 40. The upper portion of the shaft 40 is journaled in bearings 43 and 44 and the upper part of the frame of the machine is provided with a thrust screw 45 which bears upon the upper end of the shaft 40.

A worm 46 is mounted upon the shaft 40 and meshes with the worm wheel 20. A plate 47 is mounted upon the rear portion of the top of the drum 36 and a wall 48 extends downwardly and rearwardly from the plate 47 and is spaced from the rear wall 31 of the combustion chamber. A casting 49 is attached to the lower edge of the wall 48 and extension sections 50 are hingedly connected with the casting 49 and may swing rearwardly but are restrained from swinging in a forward direction when they have assumed end to end abutting positions as shown in Figure 6 of the drawings. The sections 50 are spaced beyond the lower rear edge of the lip 30 and yield rearwardly to prevent clogging at the mouth de fined by them and the lip plate. An oil cup 51 is provided for supplying a lubricant to the bearing at the upper end of the shaft 40.

It is apparent that rotary movement is transmitted from the shaft 17 to the shaft 40 through the worm wheel 20 and worm 46 and as the shaft 40 rotates the blades 42 are carried around the axis of the shaft and draw in a current of air through the openings 41 in the top of the drum. This current of air is forced down through the pipes 27 and into the fire which is in the fire box 26. Therefore when the straw is passed over the platform 1 from the rack 3 into the chute 24 and under the door 25 the straw is ignited by the fire from the fire box 26. At the same time the fan blades 42 force drafts of air through the nozzles 32 in a downward direction toward the lower ends of the grate bars and the lip 30. At, the same time drafts of air pass through the registering

openings

37 and 38 and pass down through the space between the rear wall 31 0f the combustion chamber and the wall 48 and as the burning straw passes through the spaces between the upstanding fingers 29 additional drafts of air are supplied thereto and as the straw is deposited upon the surface of the ground there is sufficient fire and heat in the blaze thereof to ignite and burn the weeds standing in the ground.

Having described the invention what is claimed 1. A weed burner comprising a wheel carried platform, a combustion member mounted upon the platform and having a receiving chute, a door hingedly mounted in said chute, a fire box located below the forward end of the combustion chamber, a grate constituting the bottom of the combustion chamber, said chamber having an opening at its lower rear end, a wall disposed in rear of said combustion chamber and spaced from the rear wall thereof to define a downwardly directed air passage across the opening in said combustion chamber, means for discharging air through said air passage and means at the top of said combustion chamber and in communication with the air discharging means for directing air downwardly in a diagonal direction from the top and through the opening in said combustion chamber.

2. A weed burner comprising a wheel carried platform, a combustion chamber located thereon and having a forwardly disposed intake for the passage of fuel from said platform, a fire box located below the forward end of the combustion chamber directly back of the intake, a downwardly inclined grate constituting the bottom of the combustion chamber back of the fire box and formed with terminal upwardly directed fingers, the combustion chamber having a discharge opening adjacent said fingers, an air duct back of said combustion chamber, downwardly and rearwardly inclined nipples at the top of said combustion chamber, and means for discharging air through said nipples into said combustion chamber and out through said opening, said means also discharging through said discharge duct across said opening.

3. A weed burner comprising a wheel carried platform, a combustion chamber located thereon and having a forwardly disposed intake for the passage of fuel from said platform, a fire box located below therforward end of the combustion chamber directly back of the intake, a downwardly inclined grate constituting the bottom of the combustion chamber back of the fire box and formed with terminal upwardly directed fingers, the combustion chamber having a discharge opening adjacent said fingers, an air duct back of said combustion chamber, downwardly and rearwardly inclined nipples at the top of said combustion chamber, and means for discharging air through said nipples into said combustion chamber and out through said opening, said means also discharging through said discharge duct across said opening, the combustion chamber being provided with a lip plate supporting the rear end of said grate and arranged at an acute angle with the upwardly directed fingers of said grate. 1

4. A weed burner comprising a wheel carried platform, a combustion chamber mounted on said platform and having a forward intake opening to receive fuel from said platform, a fire box disposed below said forward end of the combustion chamber and directly back of said intake,

a wall disposed back of said combustion chamber and spaced from the rear wall thereof to define an air duct, the combustion chamber having an opening at its lower rear end, a downwardly inclined grate constituting the bottom of saidcombustion chamber back of the fire box and formed with terminal upwardly directed fingers adjacent said opening, air nipples disposed in the top of the combustion chamber and directed downwardly toward the opening thereof, and means for discharging air through said nipples into the combustion chamber and for discharging air through the air duct defined by said wall, the combustion chamber having a lip plate defining the bottom edge of said opening and supporting said grate at its rear end and said rear wall having hingedly connected sections extending below the plane of said lip plate and limited to rearwardly yielding movement.

GREGER E. GUTTORMSON.