US1297247A - Furnace-front. - Google Patents

Description

L'REID.

FURNACE FRONT. APPLICATION FILED mac. I6, 1918.

1,297,247; Patented Mar. 11,1919.

3 suing-slain l- J. REID.

FURNACE FRONT.

APPLlCATlON HLED mac. :6, 191B.

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kgnfay J. REID.

FURNACE FRONT.

APPHCATION FILED DEC.15 191s.

Patented Mar. 11, 1919.

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UNITED STATES TUKTENT OFFICE.

JOHN-REID, on NEW YORK, N. Y.

FURNACE-FRONT.

Specification of Letters Patent.

Application filed December 16, 1918. Serial No. 266,958.

To all whom it may concern:

Be it known that I, JOHN REID, a. subject of the King of Great Britain, and residing at 30 Church street, in the city ofNew York, in the State of New York, in the United States of America, have invented a new and useful Improvement in Furnace- Fronts, of which the following is a specification.

The invention relates to improvements in furnace fronts as described in the present specification and illustrated in the accompanying drawings that form part of the same. I

The invention consists essentially of the novel construction and arrangement, whereby the main parts of the structure are formed of two pieces, the front portion being adaptable to diiferent back portions.

The objects of the invention are to simplify the foundry operations in casting-the pieces and insure accessibility of all-surfaces in molds, so that they can be graphited for more perfect finish; to eliminate cores incasting and thereby obviate the expense of replacing bad castings incidental to working with cores; to effect a better distribution of metal during the process of casting the front, than is possible with the front in one piece and thereby save in the price of mate rial and in the cost of labor; to increase the facility for repairs and replacements after use or before installation where damages occur; to aid in the assembling and installation of a furnace front by forming the front portion as a standard part ready to receive the machinery and various pieces connected with the completion of the front and thus put it in readiness for bolting on the back portion, which is made to fit the furnace mouth; and generally to provide for marine and stationary plants a furnace front, in

which the part more likely to damage from great heat may be replaced or repaired at any time and leave the other part carrying allthe machinery and pieces practically.

untouched and so facilitate construction and consequent production, installation and standardization,

In the drawings, Figure 1 is an elevation of the outer part of the furnace front from the inside showing its applicability to the attachment of valves and gear to facilitate assembling. v w

part

Patented Mar. 11, 1919.

Fig. 6 is a side elevation of the assembled v parts.

Fig. 7 is an enlarged fragmentary view showing the details of a joint.

Fig. 8 is an enlarged fragmentary view showing the details of a joint at right angles to the portion shown in Fig. 7.

Fig. 9 is a vertical sectional view showing another form of the invention.

Like numerals of reference indicate corresponding parts in each figure.

This invention is primarily intended as an advance in the art of marine engineering, though the construction is also applicable in stationary plants, however for marine work the advantages-are very much in evidence and it will readily be understood that to carr a stock of complete spare fronts on shipboard is not practical, while to carry spare back plates is quite feasible and the installation of the; same reasonably simple and to cast a heavy plate with comparatively light parts projecting. therefrom is an easy matter compared with casting two heavy plates joined by lighter parts, and furtherthe standardization of the whole front in its various pieces is readily carried out by havingseparated bodies or structures for the inner and outer parts. The developments in standardizing have in my inventions relating to furnace fronts, been systematically advanced, as is evidenced by my several applications 'now pending and filed under passage'and forming the bottom wall of the.

air chamber 5, the upper and side walls of said air chamber being formed by the cover.

6 extending theifull distance between the front and back plates and resting on and secured to the ledge 7, outside of the upward flange 8 from said shelf projections at, said cover having ports 9 as customary. In fact it may be said that the removable cover 6 in itself is not novel, but is used in carrying out the purpose and completing the structure in this invention.

The fuel passage wall 2 is formed at its inner end in the center of the face thereof with a packing recess 10 to receive a gasket 11, putty, asbestos cement or other sultable packing.

The alining snugs 12 are cast with the front plate and fuel passage walls and project from the end of the fuel passage wall as many or as few as required and in as many places as desired, but here shown as three places, at the top and at each side, just below the shelves 4:.

These snugs 12 are rigid and strong and are used for lining up and fitting.

The outer portion 13 of the ash pit flare extends inwardl 1 at the lower end of the plate 1 substantially direct and has similar alining snugs it on the outer side here shown as four in number though as many or as few as required may be used.

The inner face of the ash pit flare front section is formed to receive the gasket 15 in the recess 16 or putty, asbestos cement or other suitable oint packing.

T he valves 17 are mounted in the outer part of the front, that is to say, behind the front plate 1 and extend beyond the flare and fuel passage sections, so as to reach into the back part.

All the accompanying valve mechanism, valve handles, doors, hinges and other neces sary pieces are attached and remain permanently with the outer half of the front, con sequently to complete the furnace front only the back half has to be attached.

The back plate 18 is formed with fuel and ash pit openings corresponding to the front plate, and is made on the furnace side to fit the particular furnace mouth or type of furnace mouth, though it may be made plain and attached by an adapter ring fully set forth and explained in a copending application hereinbefore referred to.

From the face of the back plate 18 opposing the front plate 1 the fuel passage wall 19 extends to meet the front section of said wall from the front plate 1 and in the inner end face of said wall 19, the recess 20 is formed to receive the packing 11. Furthermore the ribs 21 terminate short of the end of said wall 19 opposite to the snugs 12 and in fitting and lining up come into contact with said snugs and prevent the rubbing of the end faces of the fuel passage wall sections 2 and 19.

The rear section 22 of the ash pit flare is inclined from adjacent to the edge of Leaves? lower portion of the back plate 18 to the end face of the front section of the said ash pit flare and has a corresponding recess 23 receiving the packing 15, and also has the ribs 21 meeting the alining snugs 1a, which prevents the rubbing of the end faces of said ash pit flare sections.

The shapes of the front and rear castings produce in the ash pit flare a downward slope for the inner portion starting from the split and this will prove quite effective in operation.

In Fig. 9 the walls 25 and 26 representing the connecting parts are shown as extending from the front to the rear plate, which is made separate, but the preferable arrange ment is to have the split midwaybetween the plates, so that each plate carries itscom plement of connecting walls.

In assembling these parts, the outer part and the inner part are brought together, so that the inner end faces of the fuel passage walls, ash pit flare or any other connecting projections nearly meet, but are separated by the packing therebetween and kept from actual contact bythe alining snugs.

The bolts securing the front and rear halves together are then tightly screwed'to place and the front is then complete to be installed in the furnace mouth-either by the back plate or with an adapter-ring secured to said back plate as hereinbefore explained.

It has been already said that the outer part carries all the removable pieces with it and it will readily be understood that these pieces, where required, extend into the back half and complete the particular part theyare made for with said back half and its features.

It will be seen that the salient features of this invention follow along the lines of my progress in the direction of standardization, referred to in the earlier part of this description, and therefore without departing from the spirit of the invention, many changes may be made in the construction and shall be considered as within the protection of the patent, so long as they remain within the scope of the claims for novelty following.

\Vl at I claim is 1. A furnace front comprising a front plate having integral walls extending rearwardly therefrom forming sections of the fuel passage and ash pit, a back plate approximately the same size as the said front plate and parallel therewith and having in te ral walls extending forwardly therefromto the aforesaid integral walls and forming therewith the fuel passage and ash pit passage, packing introduced between the oppos- Same size and parallel one with the other, securing the parts together and acover plate each having Walls extending therefrom the forming the top and side walls of the air Walls of one plate connecting with those of chamber and rigidly secured to said bottom. 10 the other late to complete the fuel passage Signed at the city of Montreal, Quebec,

5 and ash p1t passage and to provide a sup- Canada, this 2nd day of December, 1918.

porting bottom for an air chamber, packing between the end surfaces of said Walls, bolts JOHN REID.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. c."

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