US1470736A

US1470736A - Fire-box arch and arch brick

Info

Publication number: US1470736A
Application number: US468846A
Authority: US
Inventors: Raleigh J Himmelright
Original assignee: AMERICAN ARCH CO
Current assignee: AMERICAN ARCH CO
Priority date: 1921-05-12
Filing date: 1921-05-12
Publication date: 1923-10-16
Anticipated expiration: 1940-10-16

Description

R. J. HlMMELRlGHT FIRE BOX ARCH AND ARCH BRICK Oct. 16, 1923.

2 Sheets-Sheet 1 Filed May 12, 1921 Illlllllllllll J. HIMMELRIGHT- FIRE BOX ARCH AND ARCH'BRIGK Oct. 16 1923.

' File d May 12, 1921 2 Sheets-Sheet 2 Patented Get. 16, W23.

RALEIGH .T. HELRIGHT, OF ENGLEWOOD, NEW YORK, ASSIGNGR T0 AMERICAN ARCH". COMPANY, A CORPORATION OF DELAWARE.

FIRE-BOX AIR-CH AND ARCH BRICK.

Application filed ma 12, 1921.

T 0 all whom it may concern:

Be it known that I, RALEIGH J. HIMMEL- RIGHT, a citizen of the United States, residing at Englewood, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Fire- Box Arches and Arch Bricks, of which the following is a specification.

This invention relates to fire box arches oil the type which has become known in the art as sectional, that is of the type which are composed or built up of a plurality of individual bricks suitably supported adjacent one another to form in combination the arch or bafiie. It is especially usein] in and has been particularly designed for a locomotive fire box which is equipped with circulation tubes upon which the bricks of the arch are supported. In arches of this type which are so supported it is customary to place a series of bricks at each side of the fire box which rest at their inner ends upon the outermost tubes and at their outer ends lean against the side sheets and my inv ntion directly relates to an improved form oi brick for use in such portions of an arch.

Bricks of the character to which my invention particularly relates are known in the art as side bricks and in this application they will be referred to by such name.

It is the primary object of my invention to provide a side brick for tube supported fire box arches which will have a firm and secure seat on the tube and one which will maintain the relation between the brick and the tube longitudinally of the tube fixed while at the same time permitting variations in the relation of the brick with respect to the side sheet against which it is leaning. It is also an object of my invention to provide a side brick which will accommodate itself to variations in the size of the tube upon which it rests and one which will have a stable bearing upon the tube regardless of slight inaccuracies which occur in manufacture. In applying side bricks it is highly essential that they have at all times this firm and secure seat'on the tube because if they do not the result will be an unstable arrangement with the danger of having bricks drop into the fire bed.

Another object of my invention is to provide a side brick which will more readily accommodate itself to fire boxes in which the Serial N0. 468,843.

side sheets run at a slight angle with respect to the tubes, in other words in fire boxes which are known as taper fire boxes.

The foregoing together with any other objects which are incident to my invention or which may appear hereinafter, I obtain by means of a construction which is illustrated in the accompanying drawings, wherein Fig. 1 is a plan view of my improved brick; Fig. 2 is a'side elevation; Fig. 3 is a plan view of the undersurface of the brick; Fig. 4 is an end elevation of the tube end of the brick; Fig. 5 is a section on the line 5--5 of Fig. 2; Fig. 6 is a transverse section through a locomotive fire box and its arch illustrating the manner in which my improved brick is applied; Fig. 7 is a section on the line 7-7 of 3; Fig. 8 is a partial longitudinal section through the forward end of a locomotive fire box having a side sheet which is disposed at an angle with respect to the adjacent tube and which illustrates an arch having side bricks of the type formerly in use; Fig. 9 is a section similar to that of Fig. 8 illustrating side bricks of my improved construction; Fig. 10 is a fragmentary section through a locomotive fire box looking directly down upon a portion of an arch in .which the side bricks are of the type heretofore in use; and Fig. 11 is a section similar to that of Fig. 10 illustrating side bricks of my improved construction. Figs. 10 and 11 illustrate fire boxes in which the side sheets are dispesed approximately parallel with the tubes, and Fig. 12 is an end View of the side sheet end of the brick.

In the accompanying drawings I have designated my improved side brick by means of the reference character S and it will be noted that at the tube engaging and I have provided spaced lugs 1 which are formed in a peculiar manner to be described to provide socket-like recesses embracing the tube. These sockets or recesses do not contact with the tube throughout their entire surface as has heretofore been customary in constructing arch bricks, but instead they are so formed as to provide two points of contact on the tube spaced circum erentially thereof. By referring to Fig. 7 it will be seen that the surface of each recess is composed of two

arcuate planes

2 and 3 struck preferably with the same radius 4, but from difierent cone ters respectively and 6, the center 5 for the upper are 2 being located at a point somewhat below the center of the tube indicated in dotted lines at 7 and the center 6 for the 5 lower arc 3 being located at a point somewhat above the center of the tube. The two arcuate surfaces intersect at some point near the base of the tube embracing socket which point I have indicated by the reference character 8. It will be readily apparent that such a structure will make the bricks accommodable within reasonable limits to tubes of different sizes. The circumference of the tube at no time touches the base 8 of the re cess on the line where the two arcuate surfaces intersect and the tube is therefore embraced between the two surfaces which provide line contacts or bearings on the tube at points spaced circumferentially thereof. The construction provides a very firm seat and stable application especially in view of the fact that the arrangement is such as to provide spaced bearings upon the tube, one at each side of the tube engaging end. There is a recess 9 between the lug structures 1 just described.

The outer end of the brick which rests against the side sheet is provided with a downwardly and inwardly inclined curved surface 10 which extends transversely of the brick from one side to the other and immediately adjacent the upper edge thereof.

' This surface, at approximately its middle point merges into what may be termed a taper or wedge shaped rib 11 also extending downwardly and inwardly, but at an angle which is somewhat more sharp than the angle of the surface 10 as clearly illustrated in the figures. By forming this end of the brick in the manner just described there is provided a single point of support, by means of which it is possible for the brick to assume various angular relations with respect to the side sheet in a direction longitudinally of the tube as well as transversely of the tube without changing the relation between the brick and the tube in a direction longitudinally of the tube. Such variations arise from a number of causes chief of which are differences in the distances between a tube and a side sheet at different points along the length of the tube and irregularities orinaccuracies in the brick itself which creep in during manufacture and which will sults sought, however, have been in many cases defeated by the side formations of the former bricks in installations where a plurality of side bricks are arranged in a row with their adjacent side faces touching one another. I, therefore, propose to improve the side bricks already known not only in the manner already set forth, but also in an additional manner now to be described.

I construct my side brick with the sides 12 tapering inwardly from the tube engaging end to the side sheet engaging end as very clearl shown in Figure 1, 3, 9 and 1-1. The side bricks illustrate in Figures 8 and 10 illustrate for purposes of comparison the structure at present employed. It will be noted that the side bricks S in these two figures are the same width at the tube end as at the side sheet engaging end, there fore, when a plurality of them are arranged in a row with the sides contacting, the very purpose of the rounded ends is often defeated by the fact that the bricks are jammed up against one another so that no possible adjustment or accommodation with respect to the side sheet is possible. In manufacture it is often impossible during the processes of molding and baking to maintain a true right angle between either one or both of the parallel sides and the tube engaging end. If, however, the bricks are relieved at the sides by tapering or otherwise forming them as herein proposed so that there will be spaces 13 between adjacent bricks in a row it is possible for the bricks to accommodate themselves to any variations above enumerated while at the same time maintaining a firm and stable seat on the tube without altering the relation between the brick and the tube in a direction longitudinally thereof. A brick which is formed to permit such accommodation and adjustment might well be termed, a brick which is relieved at the sides and the spaces between bricks might well be called brick accommo dating spaces.

The under face of the brick is provided with pockets 14 for the purpose of breaking up and thoroughly mixing the products of combustion in a manner well known in the art.

In Figs. 8 and 10 I have somewhat exaggeratedly illustrated in dotted lines the positions which might be assumed by the side bricks S due to any, or to a combination of the undesirable possibilities hereinbefore brought out. If one of a series of side bricks S of the type heretofore used should for any reason not seat accurately on the tube it would have a tendency to throw all the others of the series out of position but where my improved side bricks are used, as in Figs. 9 and 11, this would not occur. In other words, where my improved side bricks are used each one of a series is perfectly free to adjust itself individually to its proper position on the tube without interference from those at each side thereof. In this way a stable application of all side bricks is assure-d.

I claim:

1. A brick for tube-equipped locomotive fire box arches which is adapted to be supported betweenatube andaside of the box, having one end formed with a tube engaging face and the other end having a side sheet engaging face, arranged to provide a single point of support whereby to permit angular variations between the brick and the side without changing the angular relation of the brick to the tube at the tube engaging end in the direction longitudinally of the tube, said brick being narrower at the end which engages the side of the fire box than at the end 20 which engages the tube.

2. A brick for tube-equipped locomotive fire box arches which is adapted to be supbrick being cut away at its sides from a point adjacent .the tube engaging end to the end which engages the side of the fire box. 3. A brick for sectional arches in tubeequipped fire boxes which is adapted to be supported between a tube and a side of the box with one end resting on the tube andthe other end leaningagainst the side having a side sheet engaging face arranged to provide a single point of support whereby to permit-the brick to assume various angular relations with respect to the side in directions both longitudinally and transversely of the tube and said brick being cut away at its sides whereby, when a number are arranged in a row adjacent to one another, proper functioning of the said surface is ensured for the purpose of maintaining a fixed angular relation between the brick and the tube in a direction longitudinally of the tube.

4. A brick for fire box arches adapted to be supported between a tubular member within the'fire box and a side of the 'box, having a, member engaging face at one end providing spaced bearings each of which has two. member contacting surfaces arranged to seat thereon at points spaced circumferentially thereof, said brick having at its other end a side sheet engaging face arranged to provide a single point of sup port whereby to permit of various angular relations-between brick and side or between side and member without changing the angular relation between the brick and the member in a direction longitudinally of the member, and said brick being made smaller from the member engaging end to the end which engages the side of the box whereby, when a number of bricks are arranged in a row adjacent to one another, there are provided therebetween brick accommodatmg spaces as it were.

5. A brick for tube-equipped locomotive firebox arches which is adapted to be supported between a tube and a side of the box, having one end formed with a tube enga ing face and the other end having a si e sheet engaging face arranged to provide a single point of support whereby to permit angular variations between the brick and the side without changing the angular relation of the brick to the tube at the tube engaging end in the direction longitudinally of the tube, said brick being narrower at the end which is supported from the side of btgie box than at the end which engages the tll In testimony whereof I have hereunto signed my name.

RALEIGH J. HIMMELRIGHT.