US1322423A - Stove and other heater - Google Patents

Description

G. FURUHOLMEN.

STOVE AND OTHER HEATER.

APPLlcATluN man :upv 6, 1915'.

Patented Nov. 18, 1919.

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G. FURUHOLMEN. STOVE AND OTHER HEATER.

APPLICATION FILED JULY 6, I9I5.

Patented Nov. 18, 1919.

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G. FURUHOLMEN.

` sIovE AND OTHER HEATER.

APPLICATION FlLED JULY 6. I9\5.

Patented Nov. 18, 1919.

3 SHEETS-SHEET 3 STOVE AND OTHERl-IEATER.:

Specification of Letters Patent.

lPatented N ov. 18, 1919.

Applicationy filedJuly 6, 1915. Seri-a1 No. 38,114.

To all 207mm t may concern:

Be it known that I, GEORGE FURUHOLMEN, a subject ofthe King-.of Norway, residingat Minneapolis, in the county of Hennepin and State of Minnesota, have invented new. and useful Improvements in Stoves and other Heaters, of which the following is a specification.

My invention relates to vimprovements in stoves or other heaters and its object is to provide a highlyeflicient heating device. n

More specifically is my object to provide a stove having an improved fuel feeding device adapted under various conditions to automatically supply proper quantities of fuel to the fire box and to promote economical combustion.

1t is also my object to provide in a stove of this kind a lire box having an oscillating wall at the intake side thereof adapted to advancey fuel step by step across the grate, so that said fuel maybe subjectedy to heat for a considerable period at the margin of the lire to distil gas and coke the fuel, preparatory to later consumption.

A further object is to provide in a stove of this class, a'baifle plate with an inletopening at its lower edge, said baflie plate being arranged to direct the gases, from the coking fuel, mixed with air into the flames of the burning fuel.

A further object is to provide in astove having a fuel hopper and {ire-box, means for supplying the fire-box with fuel'y from the hopper, said means 'being arranged so that the stream of fuel is broken, c to prevent backiiring from said fire-box to said hopper.

A still further object isto provide in a stove of this kind, means .for disintegrating the coke at the margin of the fire.

My invention also includes various novel features of construction, which are hereinafter particularly described and pointed out in the claims.

Iny the drawings, Figure l is a longitudinal sectional view illustrating av stove equipped with devices embodying my invention; Fig, 2 is a sectional view taken on thel line 2*2 of Fig. 1; Fig. 3 is an end elevation 0f aA stove and shows part of my improved feeding device and the operating mechanism einployed; Fig. l is a perspective view in detail of the oscillating lire-box wall; Fig,V 5 isa perspective view in detail of` thc feeding bucket; Fig. 6 is a detail sectional view showing the tiltable grate and adjustable ire wall adjacent thereto; Fig. 7 is a perspective view in detail of a portion of the tiltafble grate; and Fig. 8 is a plan view of a portion of the stationary grate.

Referring-to the accompanying drawings, IV have illustrated an ordinary stove having sides 10, top 11, and flue 12, provided with mechanism embodying my invention., which comprises essentiallyT a fire boX A supplied with an oscillating wall 13 adapted to advance fuel across the grates, a fuel hopper B and a fuel feeding bucket C designed to receive fuel from said hopper and deliver the same into said fire box.

` he lire-box A consists of a. stationary gratell, a tiltable grate 15, an adjustable lire wall 16, the oscillating wall 13 and sides 17'. The stationary grate 14 includes aseries of grate bars 11a removably supported upon rods 14b mounted aty their ends on the sides 17; Thetiltab'le grate 15 extends transverse-ly across the fire-box and spans the space between thevstationary grate 14 and fire-wall 16. Said tiltable grate consists of a plurality of parallel bars 15a with spaces between the forward portions thereofand said bars arey detachably secured to an oscillatory shaft 18fwhich is journaled at its ends inthe sides 17. The heavier portion Qf the barsela overhang the side of the shaft 18 adjacent to the stationary grate and saidshaft isturned by the weight of said bars to a position in which the arm 19 on the lshaft'engages the stop 20 at the side of the fire-box to retain Ythe grate in normal position. A curved depending projection 15b isformedffat the forwardend of each bar to block the space between said bar and the stationary grate 141, when said tiltable grate is lifted. At the rear of each bar acrushing face 15e and ash retaining lug 15d are formed. The lug 15C1 supports the refuse when the grate 15 is in normal position and the crushing face 15c breaks up the material between the grate 15 and the concave surface 16"el of the fire wall 1G as said grate is tilted upward. The arrangement of the crushing surfaces 152 and 16L is `such that the lower part ofthe opening between them is enlarged as the forward'endof the grate 15 is raised to facilitate the eXit of wastematerial through saidopening. The fire wall 16 hangs on a pivot and is secured in desired position with respectcto the grate 15, by adjusting the set screw 21, which is threaded in the lower margin of said wall and abuts against the side 10 of the stove.

The oscillating feeding wall 13 consists of a plate 13a formed with ears 13b at the ends thereof, said ears being pivotally attached to the sides 17 of the fire-box by pintles *13c` secured in said ears. A lug 22 projecting from the lower side of said plate is pivotally connected by a link 23 with an arm 24 on a rock shaft 25 revoluble, at its ends, in the sides of the stove. The shaft 25 is supplied with an arm 26, and a rod 27, having a handle 2S thereon, is attached to said arm 2G to oscillate the same and rock said shaft (see Figs. 2 and 3). Rotation of the shaft 25 in one direction swings the wall 13 toward the opposite side of the fire-box A as indicated in dotted lines in Fig. 1, thus pushing the fuel across the grate, and rotation of said shaft in the opposite direction returns said wall to normal position as indicated in solid lines in Fig. 1.

A depending baille plate 29 between the sides 17 of the lire-box extends transversely across the middle of said fire-box and said baille plate is supplied with an air conduit 30 opening at its lower edge to mix fresh -air with the gases liberated from the coking fuel in the fire-box.

Sloping downward from the rear of the baille plate are a number of rigid disintegrating lugs 31 adapted to break up coked portions of fuel as it is advanced toward the grates of the lire-box by the oscillating wall 13.

The hopper B is assembled in the stove and has a horizontal opening at its lower edge beneath the lire-box A.

The bucket C for carrying fuel from the hopper to. the lire-box consists of. curved ends 32, a bottom 33 and a curved side wall 34 which extends a considerable distance beyond the bottom of the bucket. Said curved wall is secured at its lower end to a pair of arms 35 which are fixed to and turned by the rock-shaft. The curvature of the wall 34 corresponds with an arc struck from the axis of the rock-shaft 25 and said wall iits in sliding contact with the inner edge of the bottom 35 of the hopper B. When said bucket is depressed, the upper edge of the curved wall 34 rests beneath the bottom 35 of the hopper and permits the loading of said bucket with fuel from the hopper and when the bucket is raised said wall blocks the mouth of the hopper. A stationary curved wall 36, fixed to the sides of the stove and conforming in curvature with an arc struck from the axis of the shaft 25, closes the inner side of the bucket C at all times except when said bucket reaches its elevated position as shown in dotted lines in F ig. 1. The upper edge of this stationary curved wall 36 rets adjacent to the upper edge of the oscillating wall 13 of the iire box A when said wall 13 is swung forward as illustrated in Fig. 1. To aid in iilling the bucket with fuel from the hopper, I provide a convey'er tray 37 slidable upon the bottom 35of the hopper. This tray is connected at opposite sides thereof with links 38 each of which is attached at one end to a pin 39 passing through a slot 40 in one side of the hopper B, the other end of said link being pivotally secured to one of the arms 35 on the rock-shaft 25. These links cause the tray 37 to reciprocate, thus delivering fuel from the mouth of the hopper. A guard plate 41 is arranged at the back of the hopper to direct the fuel toward the mouth of said hopper and to prevent the escape of fuel through the slots therein. As the bucket C is elevated, the conveyer tray is shifted backward, preparatory to the delivery of a new charge of fuel from the hopper, and the oscillating wall 13 is swung forward to advance the fuel across the grates 14 and 15 and make room for the fresh supply of fuel 1n the rising bucket. Upon reaching its elevated position, the contents of the bucket, or so much thereof as is not held back by the fuel already on the grate, is discharged over the upper edge of the oscillating wall 13 andA falls into the fire-box. When the fire-box is full, the fuel remaining in the bucket returns with the bucket on its downward stroke; the conveyer tray is shifted forward to replenish the bucket with fuel from the hopper and the oscillating wall 13 is swung' back to normal position at the end of the lire-box.

I provide meachanism whereby the grate 15 is tilted by the movement of the rockshaft 25. An arm 42, secured to one end of the shaft 18, (see Fig. 3) rests in the path of a dog 43 which is pivoted on the end of a lever 44 on the rock-shaft 25 and is adapted to turn in one direction only. Said dog strikes the end of the arm 42 as the rockshaft 25 is turned. When said shaft is moved to raise the bucket C, the dog 43 is tilted by engagement with said arm 42, which it passes, but on the return stroke said dog carries the arm 42 with it and tilts the grate 15 until said arm is released from the dog 43, when said grate falls by gravity to its original position.

lt will be noted that the baffle plate 29 divides the lire-box into a coking and a combustion chamber, the former being between said baille plate and the oscillating wall 13 and the latter between said plate and adjustable wall 16. In the coking compartment gases are distilled from the fuel and said gases pass beneath the baille plate 29 where they are mixed with fresh air as they enter the combustion chamber. The grates in the combustion chamber slope upward from beneath the baille plate and this arrangement causes the surface of the bed of coals to slope upward toward the flue, thereby bringing the surface of the glowing coals lin close Contact with the gases as they pass upward toward the fine, to insure the ignition of said gases.

In use, the rod 27 is pulled outward to turn the shaft 25 and carry the bucket C from the hopper B and empty its contents, or so much thereof as can pass into the firebox. This manipulation of the rod 27 causes the oscillating wall 13 to swing forward and push the fuel in the fire box a slight distance across'the grates 1+i and l5 and also results in shifting the conveyer tray 37 toward the rear of the hopper B. The swinging of the wall 13 to niove the fuel farther into the fire box causes the same to pass between the disintegrating lugs Si,

whereby caked portions of the fuel are broken up. Said rod is then pushed back to return the bucket C and the oscillating wall 13 to their original positions and also to move the conveyer tray 37 forwardand renew the supply of fuel in the bucket. This movement of the rod 27 causes the further tilting of the grate l5 thereby discharging a quantity of ashes from the grates. Said rod 27 is reciprocated intermittently as desired and may be operated by hand or by any7 suitable source of power.

1What I claim as new and desire to protect by Letters Patent is:

l. In a stove, a frebox, a hopper having a mouth beneath the firebox, a bucket, means for reciprocating said bucket between said mouth and irebox in an arc of substantially 45o, said bucket being open at its top for the receipt of fuel and open at the side for the discharge of fuel, means for blocking the mouth of the hopper at all times except when the bucket is fully depressed, means for closing the opening at the side of the bucket at all times except when the bucket is fully elevated, whereby said bucket is adapted, when tilted to an angle of 45 at the upper end of its stroke, to dump such portion of its contents as will ill the firebox and retain the balance during its return stroke.

2. In a stove, a re box having a movable wall arranged to push the fuel across the bottom thereof, means for feeding fuel into said fire box adjacent to said movable wall and rigid lugs, depending from the top. of said fire box, between which said fuel is passed, said lugs being adapted to disintegrate said passing fuel.

3. In a stove, a fire box having an oscillating wall adapt-ed to move fuel across the bottom thereof, a hopper, a traveling bucket arranged to move back and forth between said hopper and fire box to carry fuel from the hopper and discharge it over said wall into the fire box and means for simultaneously moving the bucket and oscillating wall, whereby a quantity of-fuel is fed into the fire box, when said wall reaches the end of its stroke in advancing fuel across said fire box.

4. In a stove, a rebox, a hopper having a mouth beneath the irebox, a bucket designed to travel up and down between said mouth and firebox and formed with an opening at its top for the receipt of fuel and an opening at one side thereof for the discharge of fuel, means for blocking the mouth of the hopper at all times except when the bucket is fully depressed, means for closing the opening at the side of the bucket at all times except when the bucket is fully elevated, means in the firebox adapted to shove fuel across the bottom thereof, the movements of said fuel advancing means and bucket being so coordinated that the fuel from said bucket is emptied into the irebox as said fuel advancing means is actuated. Y

In a stove, a firebox, a fuel hopper having a discharge opening in one side thereof, a revoluble shaft beneath said firebox, means actuated by said shaft to push fuel across the bottoni of said irebox, a stationary curved wall and a vertically oscillatory curved wail. spaced from said stationary wall, a bottom rigidly secured to said oscillatory wall and in slidable contact with said stationary wall, and arms connecting said oscillatory wall to said shaft, said oscillatory wall and bottom being adapted to receive and deliver fuel from said discharge opening to said rebox simultane ously with the actuation of said fuel advancing means.

6. In a stove, a firebox, a hopper having a mouth beneath the firebox, a bucket designed to travel up and down between said mouth and firebox and formed with an opening at its top for the receipt of fuel and an opening at one side thereof for the discharge of fuel, means for blocking the mouth of the hopper at all times except when the bucket is fully depressed, means for closing the opening at the side of the bucket at all times except when the bucket is fully elevated, an oscillatory wall in the irebox adapted to shove fuel across the bottom thereof, the movements of said wall and bucket being so cordinated that the fuel from said bucket is emptied over the wall as said wall reaches the end of its working stroke.

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

GEORGE FURUIIOLMEN.

lVtnesses F. C. CAswnLL, .Toi-1N E. STRYKER, Jr.

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