Improvements in Coverings for Bollers.
Year: 1894

page_text: Date of Application, 1st May, 1894-Accepted, 30th June, 1894
COMPLETE SPECIFICATION.
Improvements in Coverings for Bollers.
I, WILLIAM ADOLPHUS SCOTT, Junior, Manufacturer, residing at No. 4615
Forbes Street, in the City of Pittsburg, County of Allegheny, State of Penn-
sylvania, and United States of America, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :—
The invention described herein relates to certain improvements in non-conducting
coverings for boilers, and has for its object a construction of covering or protecting
tile whereby they form when applied to the boiler, a continuous cover for the body
of the boiler, and whereby they may be firmly secured together and to suitable
supports forming parts of the structure of which the boiler, itself, forms a part.
In general terms the invention consists in the construction and combination,
substantially as hereinafter more fully described and claimed.
In the accompanying drawings forming a part of this Specification,
Fig. 1 is a view in side elevation of a locomotive having my improved boiler
covering applied thereto, the outlines of the locomotive being shown in dotted
lines; Fig. 2 is a top plan view of the same;
Figs. 3 and 4 are transverse sections of the boiler, the planes of section being
indicated by the lines x, x, and y, y, respectively;
Fig. 5 is a view in side elevation, on an enlarged scale, of a portion of the
boiler;
.
Fig. 6 is a sectional view on an enlarged scale, the plane of section being
indicated by the line, z, Fig. 3.
Fig. 7 is a sectional detail view, on an enlarged scale, showing the manner of
connecting adjacent ends of the covering blocks or tiles;
Fig. 8 is a top plan view of a portion of the boiler, a portion of the covering
being removed so as to show a portion of the harness employed for holding the
covering blocks in position;
Fig. 9 is a perspective view of one of the locking strips;
Figs. 10 and 11 are perspective views of two of the covering tiles.
In the practice of my invention the tiles 1 and 2, which are formed by
thoroughly burning or chunking fire clay, then moulding it to shape and again
burning, are preferably made in pairs as shown in Figs. 10 and 11, one member of
the pair being formed with a lip 4 extending along at least three sides of tile
adjacent to its inner face, as shown in Fig. 10, and the other member 2 being
provided with a similar lip 5, adjacent to its outer face, as shown in Figs. 6 and 11.
In applying these tiles or blocks to locomotive boilers, it is preferred to form the
tiles of such length as to extend about one quarter of the way around the boiler
shell, and to form one end of each tile with an angular portion 6, as shown in
Figs. 10 and 11, whereby it may be secured to a portion of the boiler structure as,
for example, the running board of a locomotive. Each of the tiles or blocks is
provided on its inner face with projections or ribs 7, near their ends for holding
the tiles a short distance away from the shell of the boiler and the recesses formed by
these projections are filled with asbestos, mineral wool, or other fibrous non-conducting
material, indestructible by heat, and which will serve as a cushion for the tile, as
shown in Figs. 3, 4, 6 and 7.
In applying these tiles or blocks to a locomotive boiler, a harness consisting of
longitudinal metal strips 8 and transverse tie strips 9 are laid in position on the
boiler, the longitudinal and transverse strips being held together by bolts 10, which

page_text: are adapted to pass through suitable holes in the tiles. As shown in Fig. 8, the
longitudinal strips 8 are suitably bent so as to pass around the steam-chest, sand
box or other projection on the shell of the boiler. Two pairs of longitudinal
strips, one for the upper and the other for the lower side of the boiler, are
employed, and the tie strips 9 connect the members of each pair, except where
the longitudinal strips pass around a projection on the boiler. At such points the
tie strips extend only to the base of such projections. As shown in Figs. 3, 4, 7
and 9, the tie strips are so bent as to form lugs 11 which project in behind the
ribs 7, on the tiles or blocks and thereby hold the same in position.
After the harness has been placed in position as described, the tiles having the
asbestos packing in their recesses, are placed in position, the augular portion 6 of
the tiles resting against the running board 12, and the opposite ends of the tiles
abutting against each other at the upper and lower sides of the boiler with their
lips 4 and 5 overlapping as shown in Figs. 3, and 7. It will be understood that
the ends of the tiles covering portions of the boiler in line with the steam chest or
other projection thereon are suitably shaped to fit closely around the base of such
projection. The tiles are secured to the running board or other projection by
bolts 13 passing through the running board and the angular portions 6 of the tiles
as shown in Fig. 4, and by the bolts 10 of the harness, passing up through holes in
the tiles.
It is preferred to enamel the outer surfaces of the tiles so as to render them
impervious to moisture and facilitate their cleaning.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :
1. In a covering for boilers, the combination of a harness formed of longitudinal
and transverse metal strips and a series of fire clay tiles secured to the harness,
substantially as set forth.
2. In a covering for boilers, the combination of a ledge or board running
longitudinal of the boiler and a series of fire clay tiles adapted to fit around the
boiler and provided with angular portions adapted to be secured to the ledge or
board, substantially as set forth.
3. A fire clay tile for covering boilers provided with lips extending along the
edges thereof and having recesses in its inner face, substantially as set forth.
4. A fire clay tile for covering boilers having its inner face shaped to conform
to or approximately to the shell to be covered and provided at one end with an
angular portion, whereby the tile may be secured to a suitable support arranged
longitudinal of the boiler, substantially as set forth.
5. In a covering for boilers, the combination of a series of tiles fitting around
the boiler and provided on their inner sides with ribs and tie strips provided with
lugs engaging said ribs, thereby preventing a separation of the ends of adjacent
tiles, substantially as set forth.
6. In a covering for boilers, the combination of a series of tiles having recesses
in their inner sides and secured together longitudinally and transversely and a
fibrous non-conducting material arranged in the recesses in the tiles and forming a
cushion therefor, substantially as set forth.
Dated this 4th day of April A D 1894