CA1073770A - Stove - Google Patents

Abstract

STOVE
STOVE

Abstract A stove for domestic use within a home for both cooking and heating purposes having a firebox the upper limit of which is defined by top wall structure enhancing firebox circulation and fuel combustion by reason of multi-levels additionally providing low and high temperature cooking surfaces. A door is provided about its perimeter with an irregular edge for interengagement with like means extending about the front wall of the stove to provide an efficient seal against smoke escape. Additionally, said door defines draft openings with positionable draft control means. An exhaust opening is disposed in the firebox so as to promote a circulatory flow within same.

Description

~073770 Specification The present invention is embodied within a stove ~or use within the home and one capable of adequately heating a moderate-ly sized home as well as providing different temperature cooXing ~ ,~
surfaces.
The stove is of welded steel plate construction utilizingangle members at its corners the lower portion of which consti-tute leg members. Different level cooking sur~aces are disposed so as to be subjected to different firebox temperatures to pro-vide low and hi~h temperature cooking surfacesO An exhaust con-duit is inwardly disposed to promote circulation of combustion products providing a ba~fle affect preventing undue heat loss and hot spots. A novel door structure serves to seal the firebox while dxaft con~rols provided in the door permit precise adjust- ;
~, ment of air into the stove for desired control of combustion.
~` Important objectives of the present invention include the ~ provision o~: a stove having a firebox the upper limits of `!; which are defined by a top wall structure with members being unlike distances from the ~ire to provide cooking surfaces of 20 different temperatures; a stove wherein the firebox is of a ~' shape imparting a circulatory flow to the products of combustion .
; to reduce the amount of residual ash while enhancing even heat transfer to the stove surfaces a stove having an outlet opening protruding into an elevated portion of the firebox so as to con- -~; stitute a baf~le preventing undue escape of heat and hot spots on ;~ '``
the stove and exhaust conduit; a stove having a door with irregu-lar marginal areas adapted fox sealed engagement with a ~ront ~ wall member defining a door opening to prevent smoke escape; a u~ stove having a door with precisely adjustable dra~t controls enabling ~ine regulation of draft air; a stove wherein a weighted :~, ~ handle serves to hold the door in sealed contact with the stove '''` -1- ~ ' .
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: fxont wall by reason of a cam action lock.
In the accompanying drawings:
~: Figure 1 is a perspective view of ~he present stov~, Figure 2 is a side elevational view of the stove with a wall fragment removedp Figure 3 is a front elevational view, Figure 4 is a sectional view of door and wall ~ragments taken along line 4-4 of Figure 3 showing door seal details, Figure S is an enlarged frontal view of that portion of the dosr defining a ven-t opening~ and ~ Figure 6 is a side elevational view of a draft contro~
;~ With continuing reference to the accompanying drawings :`
wherein applied reference numerals indicate parts similarly ~`
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. identified in the ~ollowing specification~ the reference numeral 10 indicates generally a top wall structure for the present .
tove. Supporting structure 10 is a front wall 11 sidewalls 12 ' and 13, and rear wall 14. Rear legs a~ at 18 and front leg~ as j at 19 are of angle stock with the walls being steel plates welded :~
~,. to the angle flangesO
¦~ 20 Top structure 10 is of multiple levels, non-uniorm in height from a bottom wall 15 which may qupport a grate if so desiredG In place on the bottom wall and extending upward for a portion o-E the side and rear walls is ~irebricX lining at 16 ~:~
held in place by bxackets 17.
Top structure 10 includes a orward lower wall component at ~: 20 while an upper wall component at 21 is adjacent the xear end ~-; wall of the ~tove. DesirablyO thou~h not restrictively, both com- ~
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ponents are approximately o~ llke surface area. An intermediate, ... inclined wall structure component at 22 completes the top wall ~i 30 structure. From an inspection o~ Figure 2 it will be ~een ~hat ., :~ a circulatory flow occurs in an upper area 23 of the fire~ox with

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combustion current~ generally ~ollowing the irxegular bottom surfaces of the top structure 10 a~ shown by applied arrows. En-hancing such circulation is an exhaust condui* 24 protrudlng in-wardly appr~ximately three inches into the firebox interiox as seen in Figure 3~ Said conduit may be in either sidewall or in the rear wall 14 and importantly is spaced a distance below the top wall structure 10 Accordingly, a circulatory flow i8 promul-gated which minimi~es ash residual while urther assuring the :- absence o~ hot spots on the stove exterior or on the exposed por-tion of exhaust conduit 24.
A stove door is indicated at 25 hinged by means of door and ~: front wall mounted hinge members 26. Preferably door 25 is of cast iron construction formed with an irregular perimeter extend-ing about its inner marginal portion as typically shown in Figure 4. The door perimeter has seal means at 27 and 28 which close into interposed engagement with seal means 29 and 30 pro~ecting ;~ -.~ outwardly from about a door opening 31. One practical embodiment of such a door seal is achieved by welding channel ~tock so as to ~ :
provide outwardly projecting channel flanges for intervening en~ ~
20 gagement with the irregular door perimeter. ~;;
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.~ A handle mechanism at 32 is journalled within a boss 33 ;^:
formed on the door with the handle protxuding horizontally through ~` the boss whereat an internal right angular extension 34 parallels ~` exposed portion 32 with the internal extension being engageable, :` upon door closure, with a cam surface 35 on the backside of the front wall to exert an inwardly directed force on said handle ex- -~
. ~ tension and hence the door. The handle, weighted at 36, exerts a gravitational force on ~nternal extension 34 to cause the door to be biased closed in a secure, sealed manner.
With attention to Figure 5, a door ~ragment is shown defin ing a draft openiny 37 having a spider 38 suppoxting a threaded ~,.
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boss at 39 therein. In Figure 6 I ~how a circular draft control 40 having a threaded shaft 41 engageable wi~h said box:~: for axial positioning of control 40 towards and away from opening 37. A
skirt 42 on the draft control closes openings 37 when seated against the door. Advancement or retraction of control 40 is in a precise manner with fine, incremental adju~tment possible.
The plate steel (approximately one-fourth inch thickness) construction of the stove serves to provide a durable stove capable of serving as a heat sink for long periods providing efficient heat for a home. Upper wall component~21, by reason of the circulatory flow, is the hotter of the two top wall compon-ents.

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Claims (3)

The embodiments of the invention in which an exclu-sive property or privilege is claimed are defined as follows:

1. A stove for domestic purposes, comprising in combination, (a) a flat bottom member, (b) four wall members comprising vertically-disposed front, rear and a pair of side walls, (c) a stepped-shaped top member comprising a pair of horizontally-disposed panels situated at different levels with an inclined connecting segment there-between, said top member, said wall members and said bottom members forming a firebox enclosure with the higher of said top panels being located to the rear thereof, (d) an opening, with an associated door, provided in said front wall member, (e) draft control means situated in said front wall member for regulating the amount of outside air entering into said firebox enclosure, and (f) a conduit for exhausting products of combustion extending through a wall member other than the front wall and protruding horizontally into the interior volume of said firebox enclosure, the inlet opening of said conduit being vertically disposed and situated to the rear of said enclo-sure proximate but beneath the higher top panel in the region between said inclined segment and said rear wall, with said conduit protruding to a substantial depth into the interior of said fire-box enclosure effective to serve as a baffle both to prevent localized hot spots on the stove and exhaust conduit exterior and also to promote and guide circulatory flow of combustion currents from front to rear of said firebox enclosure and up into the region around said conduit protrusion and adjoining said upper top panel.

2. A stove according to Claim 1 wherein said stove bottom member is of uniform height extending from front to rear of said firebox enclosure and said respective top panel portions are at substantially different temperatures during normal stove operation.

3. A stove according to Claim 1 wherein said front wall member additionally includes flange means mounted thereon about the perimeter of said door opening, said door associated with said opening being hingedly mounted to said front wall and having flange means about its respective perimeter for inter-posed engagement with said wall-mounted flange means to provide a secure smoke seal around said opening when said door is in a closed position.