US1113113A - Furnace. - Google Patents

Description

J. R. FORTUNE.

FURNACE.

APPLICATION FILED DEC. 5. 1911.

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Patented Oct. 6, 1914.

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FURNACE.

APPLICATION FILED D130. 5.

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JOHN FORTUNE, 013 DETROIT, -MICHIGAN.

FURNACE.

Specification of Letters Patent.

Application filed December 5, 1911. Serial No. 664=,O66.

To all whom it may concern:

Be it known that 1, JOHN R. FoR'rUNii,--a citizen of the United States of America, ieshjling at Detroit, in the county of Wayne and State oi llrlichigan, have invented certain new and useful Improvements in Furnaces, oi which the following is a specification, reference being had therein to the ac-. coinpanyiog drawings.

in the operation of automatic smoke 'conshining furnaces in which an arch plate is employed to support the arches over the lire chamber and through which arch plate air is supplied from the space betweeu the arches to combustion, it is found that the air which is admitted to the air space between the arche at their forward end. tends to flow in streams through the space instead of be ingeveuly distributed over the shrfaco of the arch to cool the same and further that the air is unevenly supplied to the fire chamber throughout the length of the arch plate I for the reason that upon increased resist.

" ktlM'Q to the how of air through one portion of the arch plate l'ue tothe banking of the fuel opposite that portion, the air will all Flow to other portions of the plate and enter theretlu'oug'b.

The object of this invention is to' provide means for causing an even distribution or. the air over the surface of the inner arch to evenly cool the same and prevent unequal expansion and consequent breaking down of the arch, and further to so conduct the air to the arch plate that the air will be evenly supplied to the fire chamber throughout the length 01 the arch.

To this end the invention consists in the matters hereinafter set forth and more particularly pointed out in the claims, references being had to the accompanying draw rings. in whirh--- Figure 1 a front end elevation of a fur nace embodyingthe invention with portions broken away and in section to show the conslructiou; Fig. 2 is a perspective view of the smue with portions broken away to show the mnistructiou: Fig. 3 is a per pective detail of portion of one of. the arch plates and m'ijaceut portion. of the arches supportml tln-u'cbyr, Fig. 4 is an enlarged transverse rel-tics! section through an air inlet box; is a hmg iludinal vertical section through the same: and Fig. (5 is a perspective detail of the air hm; with its top and slice .Slum'n separated therefrom.

extrclue rear end otthe arch. comprises parallel side plates 12 built into In the 'clrawings, a furnace of the usual gcxieral construction is shown having a front plate '1, and side magazines 2 extending rearwardly therefrom, the inner side of each magazine being formed by an arch plate 3 for supporting an inner arch s and an outer arch 5 which arches spring across the fire chamber 6 from one to the other of the arch plates and are spaced apart to form transverse air passages 7 between the transverse ribs or walls 8 which extend across the space between the arches and divide the same into a series of transverse air passages 7. Each of these air passages 7 communicates with the fire chamber through the arch plates which are each formed with passages 9 opening at their lower ends below the inner arch and through openings 10 into said passages at-their up or ends.

A ii is admitted to the space between the arches atthe longitudinal center line of the outerarch by an air box 11 which is built into the outer arch 5 and extends longitudinally thereof from the front plate 1 to the This air box the arch and spacedap'art by transverse partitio'ns 13 which are detachably held in place by tic-belts 14. These bolts pass through the plates 12, one at either side of each pr0- jection and the partition is provided with :1. lug 15 extending laterally therefrom over one of the bolts tosupport the partition in place and when the nuts on the outerends of the tie-bolts are turned up and the side plates drawn toward each other thereby the partitions are firmly clamped in place by said plates. These partitions are so located that each is positioned directly o er one of the transverse ribs or Walls Swvhich divide the air space between the arches and thus air entering through the corresponding series of openings 16 in a cover plate 17 secured upon the top of the air box, is directed into the severalpassages 7 and conducted laterally in each directionirom .the air box to the arch. plates. The-to .plate 17 is grooved at its under side to orm a way 18 for a slide or danilfiir 19 adapted to be moved longitudinally of the air box. This slide is made up or'two parallel angle bars 20 connected by a series of plates 2'! which are of a SllillClEnl. width to close the openings 16 when the slide is moved longitudb nnlly. 'lhese plates 21 are spaced sachet distance apart that the. openings between Patented 0ct. 6,1914l.

these holes in the cover plate will be fully opened leaving a free passage for the air therethrough. The slide is moved by the operator by means of a handle bar 22 secured to its forward end and extending through an opening in the front plate 1 of the furnace.

By dividing the space between the inner and outer arches into a series of transverse air passages and connecting theserair passages at the center of the outer arch with the atmosphere, air is conducted into the space and evenly distributed over the surface of the inner arch to prevent unequal expansion thereof, and at the same time air is directed by these passages to the arch plates throughout their length so that air will be evenly supplied to the fire chamber along the entire length of each arch plate. By providing the damper or slide to control the inlets of the several passages the amount of air can be accurately regulated and the partial closing of the damper will control the flow of air to the fire chamber through out the length of the arch plates as said damper controls all of the passages. In the ordinary construction where the air is admitted to the space between the arches and is permitted to flow to any part of the arch plate throughout its length, the regulation of the air is difficult as when the air is partially shut oif it will flow in the direction of the least resistance or where there is the greatest draft, that is, to that part of the arch plate where the air passages therethrough are free and open and toward the rear end of the arch plate where the draft is greatest.

Having thus fully described my invention what I claim is 1. In a furnace constructionninner and outer arches providin transverse air heating passages, and a longitudinal air inlet box forming the key of the outer arch and common to all of said passages intermediate the ends thereof.

2. In a furnace construction, an inner arch, an outer sectional arch, said arches providing transverse air heating passages, a longitudinal air inlet box forming the key ing open ends, an alr box mounted between the sections of the outer arch and constituting a key therefor, and partitions in said be providing air passages normally in coml'l'lUl'llCiLtlOIl with the series of air passages.

4:- In a furnace having a tire chamber, the combination with arch plates at the sides of the tire chamber formed with seats and air passages, of arches over the fire chamber seated upon said seats and having a series of transverse air passages between them com- Inunicating with the passages in the arch plates, a member in the outer arch at the longitudinal center thereof forminr!- a series of inlets for the said passages between the arches, and a slide damper-for said member to control the flow of air therethrough.

5. In a furnace having a fire chamber, the combination with arch plates at the side of the fire chamber formed with seats and air passages, of an inner arch seated upon said seats, an outer arch seated upon said seats with a space between it and the inner arch, transverse walls between the arches d1- vidlng said space into a series of air passages having the ends thereof communicating with the passages in the arch plates, an air box in the longitudinal center of the outer arch and having the bottom thereof in communication with the transverse air passages and provided with transverse partitions above the transverse walls forming the air passages,atop on the boxhaving opein ings, and a slide damper on the box to close said openings.

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

JOHN R. ronruun.

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