US1374683A - Oil-burning-furnace front - Google Patents

Description

J. REID. on BURNING ru'RNA'cE FRONT.

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UNITED STATES JOHN REID, 0F NEW YORK, Nv. Y.

OIL-BURNING-FURNACE FRONT.

Specification of Letters Patent.

Application lei vApril 17,. 1920. Serial No. 374,770.

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Be it 'known that I, JOHN REID, a subject of the King of Great Britain, and residing at the city of New York, in the State of New York, in the United States of America,

have invented. a new and useful Oil-BurningfFurnace Front, of which the following is the specification.

The invention relates 'to an oil burning furnace front as described in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially in the novel construction and arrangement of parts -whereby the sweep of the stream. of air through the air pocket formed by the plates of the front is diverted in a flowing bend that effectually clears the corners and accelerates the delivery. v

The objects of the invention are to materially promote the combustion of the fuel by insuring a good mixture; to facilitate the delivery of the air from both forced draft and natural draft4 sources; to economize in the consumption of fuel and increase the steaming properties of furnaces, especially in marine installations; to assist materially in carrying out the proposals and generally improvethe constructions as set forth in the following applications for patents: Convertible furnace front Serial Number 299,361 filed May 23rd, 1919, Serial Number `323,177

filed September 11th, 1919, Serial Number 334,355 filed October 29th, 1919, Serial Number 315,904 filed August 7th, .1919, Serial Number 345,396 filed December 16th, 1919, Serial Number 291,362 filed A ril 19th, 1919, 'Serial Number 364,343 led March 8th, 1920, Serial Number 364,342 filed March 8th, 1920, and the following) patents: Number 1,321,555 dated Novem er 11th, 1919, Number 1,322,343 dated November 18th, 1919, andl Number 1,297,247 dated March 11th, 1919; and generally to p-rovide an efficient and serviceable' furnace front which may readily be converted to a coal burning furnace front withoutremoving the main parts from the furnace mouth.

In the drawings, Figure 1 is a front elevation of the backplate showing the-.inter-- .mediate walls in section. f

vFig. 2 is a vertical sectional view` showing same construction of front as illustrated in Fig. 1.

Fig. 3 isl a` front elevation of the back plate showmga slightly modified form.

Fig.- 4 1s a vertical sectionalvview of a modified form also showing the natural` draft effects.

Like numerals of reference indicate corresponding parts in the two groups of figures respectively.

In this invention, it, will'be shown herein that it is desirable in the many forms of furnace fronts already developed by me to successfully create efiicient draft effects. One of the most important aims throughout the development of the inventions has been and is at the present the passage of the air through they air pocket formed by the front and back plates and intermediate walls.

Inboth forced draft and natural draft, the tendency of the air in passage is to accumulate and form pockets of dead air,

Patented Apr. 12, 1921,.

to the combustion chamber in either oil or coal burning furnaces, and'it isI toavoid any such happening that this invention has been made by directing the flow, so that a natural bend will be imparted to the stream of air through the internal arrangements of the front; the pocket is thoroughly swept and the air deliveredinthe most propitious manner for the furthering of the combustion. f

Referring to the drawings, the back plate -1 is shown 'in Fig. 1. with the shield wall 2 projecting forwardly therefrom and having a central4 port 3 closed by the valve 4 and a closed by the valve 7.

The front plate 8 completes the air pocket 9 and-from this air pocket the flame opening 10 foran oil burning furnace, as this front primarily is intended for, leads to the fireflare wall 5 surrounding the lower portion of the front and forming the side port 6 boX. There is a corresponding opening 11 in the front plate as well as i a lower opening 12. f

The opening 11 is covered by the closure plate 13, which is here shown as having the upper part hinged in the form of a natural draft door 14.

The lower opening 12 isf'closed by the natural draft door 15.

The back p latel also has a lower -opening 16, which is closed by the plate 17 under normal conditions.

.The baflie wall 18 extends between the front and back plates at the upper ends of the openings 10 and 1 1 and is formed with the ports 19 through which in the forced draft arrangement, `a certain proportion .of the air reaches the flame area.

The oil pipe sleeve 20 is mounted in the closure plate 13 and extends inwardly part way across the distance between the front and. back plates .and at the end carries the burner 21.

The spider 22 is mounted on the oil pipe sleeve 20 at the burner end and carries at the end of its legs the air director 23.

This air director 23 is preferably in the form of a cone Shell 24 having the curved vanes 25 projecting outwardly therefrom forming the plurality of air passages along the outer side of the shell frequently termed spiralized passages, though as in 'former inventions of mine mentioned in the foregoing these vanes may be perfectly straight. In any event 'they project outwardly beyond the shell into proximity with "the llame opening 10. i i

The burner 21 is well within the cone shell 24 and therefore the spread of the flame'occpies a considerable area beyond the flame opening, which is the point where the air reaches it between the end of the cone shell ,and the edge of the flame opening. i

The delivery ofthe air is further improved by the slight construction of the opening through the brick work 26 at 27, which corresponds to the Venturi tube ef-v fectso well known in furnace construction;

The openings 28 through the spider are closed by the cap 29 which is 'adjustable along the sleeve 20 and operated by the rods 30 terminating in the vhandles 31.

This -feature of the invention is most im-,

portant for not only is the creation of a vacuum avoided but facilities are provided 'by this cap for eliminating the choking o if of the flame at the burner mouth and the feed of air through the cone shell to the flame, veach at its proper time.

In Figs. 3 and 4 slight changes in the construction only, .are sho-wn and in this form of the invention side valves are omitted and the shield wall 32 shown with the central port and valve 33 as in Fig. 1 and the flare wall also as in Fig. 1.

have the same opening as shown in'Figs. 1 and 2, but the closure plate 37 is shown with the natural draft door 38 open to permit air to pass through thefront plateV opening and also the natural draft door'39 open to permit air to pass through the lower opening.

-.The oil pipe sleeve 40 is mounted in the closure plate and extends inwardly for part `of thee istance to the back plate and at its inner end carries the burner 41. f .v

The back plate 35 and thefront plate 36 the edge of the flame opening and by this means the air director 42 is rigidly supported quite clear of the oil pipe sleeve.

The inner vanes 46 project from' the interior wall to the cone shell 43 and form passages therealong for the air, the vanes 46 being cut away atthe entrance of the shell-for` the cone cap 47 to move into and close said entrance, this cone cap being op` erated by handles 49.

The baffle wall 50 vis precisely the same as the baille wall 18, as described hereinbefore. It will be seen that in the operation of this` .invention that the usual course to take is to start the fire with natural draft and by opening the natural draft doors in the closure plate and at the bottom, a stream of air flows in which takes a bend that will the rods 48 terminating 1n the 'much facilitate the flow particularly as "shown by the arrow through the opening in the front plate.

The lower stream feeds much as usual until ,it comes to the air director, when the stream is 'bent to flow through the opening beyond the cone shell and the back plates.

Justwas soon as the flame gets a fair start the cap-at the entrance of the cone shell maybe opened, this naturally increases the flow of air to the flame, infact in the customary-Way of air streams, the heated air will naturally expand as it enters the cone which are secured to the back plate 35 at shell, which as explained flares outwardly and as it flows on, 1't joins the stream of air flowing in from the outer side and both reach the flame at the most satisfactory point for the betterment of the condition surrounding -the combustion ofthe fuel.

This particular construction is as beforel explained most effective in the direction of air but it also has material advantages in so farasgthe structural features are concerned merely because of conversion of a furnace. for coal burning purposes, for it will be readily understood 'it 1s an easy matter to remove the closure plate and'o1l pipe sleeve therewith and when the air direc-l tor is mounted on the sleeve take it and the air director-olf at one time 'and when the air d1rector is bolted to the back plate simly'remove the bolts and take it away. The

uilding up. of the front then is a matter of l deta1l and' 1t 1s not at lall necessary to remove the main parts for the air shield wall and flare Wall may remain just the same though the side Valves are omitted. These must be installed for coal burning purposes. Also it may be said that the plainest construction has been shown in the drawings in regard to the frame of the front simply because any one of the sectional forms may be used no matter in how many pieces or where joined for the results will be similar in regard to the direction of air with which this particular invention has more to do than with the actual building up of the main ed shall not be invalidated.

IVhat I claim is l. In an oil burning furnace front having front and back plates forming an air pocket, a closure for the front opening tosaid pocket, a burner supported from said closure and an air director in cone shell form' flaring toward the flame opening and having outer and inner vanes forming passages in the direction of the outlet to the llame situated at the extremity of said shell.

2. In an oil burning furnace front'having front and back plates forming an air pocket, a closure for the front opening to said pocket, 'a burner supported from said closure and an air director having outer vanes extending from the'inner open end of a shell body in the'direction of the edge of the flame opening and terminating in that vicinity and beyond said shell body and inner vanes forming short passages to the flame opening within the Shell body.

3. In an oil burning furnace front having front and back plates forming an air pocket, a closure for the front opening to said pocket, a burner supported from said closure and an air director having vanes from the outer side of a shell body extending to the flame opening and` rigidly secured by brackets to the'back plate at the edge of said llame opening.

4. vIn an oil burning furnace front having front and back plates forming an air pocket,

a closure for the front opening to said pocket, a burner supported from said closure and an air director formed on a cone shell body having its inlet and smaller end surrounding the burner support and its outlet and larger end surrounding the llame in the vicinity of the flame opening, a plurality of vanes projecting outwardly from the shell body and secured to the back plate and a closure for the cone inlet.

5. In an oil burning furnace front having front and back plates forming an air pocket, a closure for the front opening to said pocket, a burner supported from said closure and an air director formed of a cone shell body having its Vinlet end circling the burner support and rigid therewith and its outlet end in the vicinity of the edge of the flame opening, vanes extending from the outside of said body and therebeyond at the larger end and a closure for the cone inlet.

6. In an oil burning furnace front having front and back plates forming an air pocket,

a closure for the front opening. to said` pocket, a burner supported from said closure, an air director having an inlet into said shell and vanes in the outer side forming passages leading to the llame opening adjacent lto the edge thereof, and a spider rigidly mounted on the burner support and supporting said cone shell body at its smaller end and a cap in plate form closing the inlet to said. shell body and having operating rods and handles also secured thereto.

7 In an oil burning furnace front having front and back plates forming an air pocket, a closure for the front opening to 'said pocket, a burner supported from said olosure, an air director having 1its body flaring in the direction of the llame opening and an inlet end and vanes outside and inside, and a cone cap fitting into said inlet end and having rods and handles operable from the exterior of the front plate.

Signed at the city of New York, in 'the State of New York, in the United States of America, this 7 day ofvApril, 1920.

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