US1150887A - Furnace. - Google Patents

Description

' B. RUGGLES.

FURNACE.

APPLICATIONFILED sPT.17,1910.

Patented Aug. 24, 1915.

2 SHEETSSHEET l- Arm/mm RUGGLES.

FURNACE.

APPLICATION FILED SEPT. 11. 19.10.

Patented Aug. 24:, 1915.

2 SHEETS-SHEET 2.

WI TIJESSES WILLIAM BARKER RUGGLES, 0F BAYONNE, NEW JERSEY.

FURNACE.

Specification of Letters Patent.

Patented Aug. 24, 1915.

Application filed September 17, 1910. Serial No. 582,448.

naces, of which the following is a full, clear,

and exact description, such as will enable others skilled in the art to which it appertains to make and'use the same.

This invention relates to furnaces, and with regard to its more specific features, to portable furnaces.

One object of the invention is the provision of a simple and eflicient furnace, which though generally useful, is peculiarly adapted to driers, and especially to driers of the portable type, in that it is of such substantial construction that it may be readily transferred from place to place without impairing its efficiency; is of comparatively light weight and small size but great heating capacity; and is one wherein intense heat may be developed without burning out the combustion chamber.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, forming part of this specification and wherem 1s illustrated one of the various possible embodiments of the invention, Figure l is a front end elevation of the furnace; Fig. 2 is a section on line 13-13, Fig. 1; Fig. 3 is a section on line OO, Fig. 2; Fig. 4 is a rear end elevation of the furnace.

Similar reference characters are employed to indicate similar parts throughout the several views.

The furnace 28 comprises a generally cylindrical metallic structure having a substantially plane front and back. Three curved angle iron arches 54, and 56, spaced apart, rest with their'ends upon the channel bars 57, supported in turn by legs 58 having lugs 59 which are adapted to rest on a suitable support, such as bars 1 forming a portion of a vehicle frame, the whole presenting a generally cylindricalskeleton structure or base. Conforming and secured to the outside of this arched framework is a metallic cover or casing 60. Also conforming and secured to the arches is an inside metallic casing or body portion 61.

The cover 60 has, at the top of the furnace, a longitudinal opening 62 extending the full length of the furnace, the margin of the opening in the cover being braced by angle irons secured thereto. Bolts connect these angle irons across the opening, bracing and holding the parts.

On the inside of the body portion 61 at a suitable height are secured angle irons 63 adapted to support the fire brick lining 64, which conforms to the arch form of the furnace and extends inwardly at the base of the front of the furnace are curved angle irons 67 serving to support and secure the curved plate 68 which forms the bottom of the ash pit and the furnace, and is in effect a continuation of'the body portion 61. At its longitudinal central portion the wall of the ash pit is braced by a conforming metallic strip 69, secured thereto and to the central arched angle bars.

The inside metallic lining 61, in connec-- tion with the casing 60, constitutes a jacket for the combustion chamber of the furnace, and openings or passageways 70 are provided on each side of the furnace connect ing the jacket with the ash pit, and, through the grate openings, with the combustion chamber.

The front is preferably formed in three pieces 71, 72 and 73 secured together by the angle bar straps 74,75 and 76 and to the front arched angle bar. Suitable openings and doors are provided for the combustion chamber and ash pit. In the present instance each door casing is formed of two castings 77 and 78, between which the edges of the front plates are fastened. The casting 78 is partially arched and extends into the furn'ace a sufiicient'distance to support the fire brick lining at this point, a transverse angle iron supporting the fire brick lining between the door and the periphery of the furnace. The brick lining at the rear of the combustion chamber is supported by transversely secured angle irons 7 9 and the grate bearers located at that point. Besides securing the front plates and doors in position, the straps 7 4, 7 5 and 7 6 serve to stiffen the entire structure, it being noted that the straps 76 are almost directly beneath the edges of the opening 62.

The back plate of the furnace is provided with an opening 80 surrounded by a flange 81, and a collar 82 secures the furnace smoke flue 27 to the flange. The discharge opening 80 and the flue are lined withvfire brick, and the flue extends at an angle to the back of the furnace to accommodate the inclination of the drier drum (not shown) to which the furnace may be connected. It will also be noted that the axis of the curved or cylindrical walls of the furnace being horizontally disposed, the elements are located in a most advantageous position for resisting "ertical strains suchas would be occasioned by the weight of the elements themeselves especially when supported at separate points as by means of the legs disposed as described. The inner casing of the furnace comprising the plate 68, provides an inner endless wall which is endless transversely, that is, in a direction around the axis referred to and which is continuous around the furnace save for the passageways provided between the adjacent edges of the plates 61 and 68. The

outer casing, or wall, 60 extends over more than the semi-circumference of the inner cylinder, or casing, thus not only providing a large amount of heating surface as referred to above, but also thus being in position to more efiiciently resist vertical strains tending to separate the casings. Secured at the top of the furnace is a framework 33 composed of angle irons which may be utilized to support auxiliary parts of a drier, such as a fan, a conveyer, etc.

By the above construction the air for combustion enters the furnace via the opening in the top, passing around the combustion chamber to a point beneath the grate, thence into the ash pit and through the openings in the grate to the combustion chamber. The air is therefore heated by the walls of the combustion chamber, and thus less heat in the combustion chamber is necessary to raise the temperature of the air, the otherwise wasted heat units being made available not only in the furnace but in the drier into which the products of combustion may subsequently enter. Furthermore, the heating of the air in the jacket cools the Walls of the combustion chamber, enabling a much thinner lining of fire brick to be used, and reducing the size and weight of the furnace considerably, besides lessening expense for materials. It will be observed that the air acket extends below, or beyond the combustion chamber in order to obtain all the tion could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown inv the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention, which, as a matter of language, might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secure by Letters Patent is I 1. In an apparatus of the character described, in combination, inner and outer' curved metallic walls spaced apart and disposed so that the axes of curvature are substantiallyhorizontal, the inner wall being endless in the direction around the axes, and

a grate disposed to provide a combustion chamber and an ash pit within the inclosure formed by said inner wall, said endless wall comprising a passageway connecting the space below the grate with the space between said inner and outer walls, one of said walls having an opening for the entry of air to the space between said walls.

2. In an apparatus of the character described, in combination, front and back walls, curved supporting irons carried by said front and back walls, inner and outer curved metallic walls spaced apart and disposed so that the axes of curvature are substantially horizontal, the inner wall being endless in the directionaround the axes and comprising a portion secured to said irons, and a grate disposed to provide a combustion chamber and an ash pit within the inclosure formed by said inner wall, said end: less wall comprising a passageway connecting the space below the grate with the space between said inner and outer walls, and one of said walls having an opening for the entry of air to the space between said walls.

3. In an apparatus of the character described, inner and outer curved metallic walls spaced apart and disposed so that the axes of curvature are substantially horizontal, the inner wall being endless in the direction around the axes, longitudinally disposed supporting irons secured to the inner wall, and projecting into the space surrounded by said wall at a line below the semi-diameter of the space surrounded by said inner wall, a curved refractory lining and grate bearers resting on said irons, and a grate resting on said bearers, thereby providing a combustion chamber and an ash pit within the inclosure formed by said inner wall, said endless wall comprising a passageway connecting thespace below the grate with the space between said inner and outer Walls, one of said walls having an opening for the entry of air to the space between said walls.

4:. In combination, in a furnace, a casing comprising inner and outer curved metallic walls spaced apart and disposed so that the axes of curvature are substantially horizontal, the inner wall being endless around the axes, longitudinally disposed angle irons secured to the inner wall and projecting into the space surrounded by said wall, said irons having transverse slots, lugs opposite said slots, a refractory lining for the combustion chamber resting on said irons, grate bearers resting on said lugs, a grate supported by said bearers, and a passageway below said irons connecting the space between the inner and outer walls with the space below the grate, said casing having an opening for the entry of air to the space between said walls.

5. In combination, in afurnace, a casing comprising an inner transversely endless cylindrical metallic wall, a grate providing a combustion chamber and an ash pit within the space inclosed by said wall, an outer cylindrical metallic wall spaced apart from said wall and forming with the inner wall an air jacket around the combustion chamber, a refractory lining for the combustion chamber, a plurality of metallic plates forming a front wall, a door casing intersecting the front wall and comprising separate members, the edges of said plates being secured between said members, oppositely disposed passageways connecting the space below the grate with the air jacket, said jacket having an opening intermediate said passageways for the entry of air.

6. In combination, in a furnace, horizontally disposed supporting irons spaced apart, vertically disposed curved irons connected to each of said horizontal irons and spaced horizontally'from each other, curved metallic plates providing a transversely endless wall secured to the inner faces of said curved irons and bridging the space therebetween forming a combustion chamber, and curved metallic plates secured to the outer faces of said irons bridging the space therebetween, one end of said latter plates terminating at the horizontal irons, and the opposite ends spaced apart, the endlesswall comprising openings communicating with the ash pit.

7. A furnace comprising, in combination,

a cylindrical body portion divided into a combustion chamber and an ash pit, a cover having an air inlet opening spaced from the body portion to form an air acket adjacent the combustion chamber, and extending beyond the combustion chamber, a passageway leading from the space between the body and cover to the ash pit, and means abutting the ends of the air jacket to support the furnace.

8. A furnace of the character described, comprising, in combination, vertically disposed curved angle iron bars, a metallic body portion conforming to the curvature of said bars and secured thereto, angle irons extending through the furnace and secured to the body portion, and having slots, lugs opposite said slots, grate bearers adapted to rest on said lugs, and a grate on said bearers.

In testimony whereof I affix my signature, in presence of two witnesses.

WILLIAM BARKER RUGGLES.

Witnesses LAURA E. SMITH, JAMES K. Townns.

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