US970347A - Furnace-door. - Google Patents

Description

G. ONEILL.

. FURNAGE DOOR. APPLIOATION FILED oom?. 1909.

Patented Sept. 13, 1910.

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STATES 'PATIENT OFFICE.

GEORGE ONEILL, OF MONCTON, NEW BRUNSWICK, CANADA.

FURNACE-DOOR.

To all whom it may concern:

Be it known that I, GEORGE GNniLL, of Moncton, in the Province of New Brunswick, Canada, have invented certain new and useful Improvements in Furnace- Doors, of which the following is a specification.

My invention relates to improvements in furnace doors of the type adapted to admit air to the interior of the iire box to promote combustion and eliminate smoke, and the objects of my invention are to provide means insuring proper heating of the air before it is discharged into the tire box and further to generally simplify the construction of the door; and it consists essentially of a. door formed with an outer and inner liner section having central openings and a plurality of spaced bailie plates between the sections, the said baille plates conducting the air alternately from the center to the outside. These and other features of the invention are more fully set forth and described in the accompanying specifications and drawings.

In the drawings, Figure 1 is a front View of the door. Fig. 2 is a rear view. Fig. 3 is a transverse horizontal section. Fig. 4t is a perspective View of the iirst baille plate. Fig. 5 is a perspective view of the second baile plate. Fig. 6 is a sectional detail on the line 2--2, Fig. 1.

In the drawings like figures of reference indicate corresponding parts in each figure.

Referring to the drawings, A represents the outer section of the door which will be substantially the same shape as the ordinary door at present used, that illustrated being the door for a locomotive boiler and being provided with suitable lugs 10 and 12 for hinging purposes, and a central latchin'g member 13. To admit air, the door is provided with a suitable number of perforations 14 which will vary in size and number with the amount of air desired to be introduced, and this will depend on the size of the furnace.

B represents the inner liner member, which is hollow and rovided with a central aperture 15 throug which the air discharges on to the iire. To increase the heating surface of this member and also to direct the air toward the discharge opening, the outer surface is provided with a plurality of radial corrugations 16.

Between the inner and outer members are a plurality of spaced baille plates C and D Specification of Letters Patent.

Application filed October 7, 1909.

Patented Sept. 13, 1910.

serial No. 521,593.

formed with openings adapted to conduct the air alternately from the center to the outside. The first baille plate, in the embodiment illustrated, is provided with a central opening 17 and is formed with lugs 18 adapted to space it from the outer member A. The second plate D is formed with recesses 19 around the edges and is spaced from the iirst baille plate by means of integral dellecting plates E20 which serve the double function of spacing the baille plates and guiding the air current directly from the center apertures to the outside recesses, which leave opening between the edge of the baille plate and wall of the inner member. Bolts 21 are employed to hold the baille plates and inner and outer members together, the said bolts extending into lugs 9.2 on the inner member. To acconnnodate these lugs, the baille plates are provided with notches 23 and Q4, and in order to prevent the air passing through these notches, the deflecting plates are so arranged that they will deflect the current away from said notches.

In operation, the door is preferably used in conjunction with steam injecting means such as described in my application of even date herewith Serial No. 521,847, the air being drawn through the door by the natural draft of the boiler and being comniingled with the steam, the carbon particles and unconsumed products of combustion effecting a `secondary combustion in the fire box, thereby saving fuel and eliminating smoke.

Owing to the circuitous path which the air is forced to take in passing through the door, it is eii'ectually heated and thus, more readily enters into combustion with the carbon particles. It will be observed that the recesses 19 are spaced at equal intervals around the baille plate D insuring that the air will be uniformly distributed to lthe diil'erent sides, whereby each part of the door will give substantial an equal amount of heat to the air. It is also to be noted that the baille plates 20, in addition to performing the function of deilecting the air from the lugs, guide the air directly from the outside to the center opening and prevent dead air remaining in the corners.

As many changes could be made in the above construction and many apparently, widely diii'erent embodiments of my inven tion, within the scope of the claims, could be made without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specifications and drawings, shall be interpreted as illus` trative and not in a limiting sense.

What I claim as my invention is:

1. A furnace door having a hollow lining member provided with a central opening, said member being formed with radial corrugations around the opening adapted to direct the air toward the opening and at the same time to increase the air heating surface.

2. An air admitting furnace door coinprising an outer member, an inner member having a central aperture, a baflie plate having a central opening and being spaced from the outer member, and a second baffle plate spaced from the first baflie plate and provided with a plurality of recesses around the periphery spaced at equal intervals and forming openings between the edge of the baflie plate and the wall of the inner member, said openings being opposite imperforated portions on the first mentioned bafiie plate, whereby the air will be forced to travel alternately from the center to the outside.y

3. An air admitting furnace door' com prising an outer member', an inner lining member having lugs thereon, bolts extending through the outer member to thelugs, a plurality of baffle plates in the lining member, one at least of which has delecting plates extending around the lugs, said inner and outer members being provided with suitable openings for the inlet and outlet of air.

el. A11 air admitting furnace door comprising an outer member, an inner hollow lining member, a plurality of baffle plates in the lining member having apertures alternately at the center and the outside. one of said baffle plates at least, being lprovided with deiecting plates projecting upwardly from the surface thereof and being adapted to guide the air directly from the center to the outside apertures.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

GEORGE ONEILL. Vitnesses M. J. HENDRICK, J. J. SWUMF.

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