Year: 1888

page_text: 1, JOHN HENRY SWARTZBAUGH, WILLIAM HYTER, and THOMAS LLOYD PARK,
Farmers, all of Tiffin, Seneca County, State of Ohio, 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:-
My invention has relation to certain new and useful improvements in the construction
of that class of spark-arresters which are usually located in the smoke-stack, and are
adapted to separate the sparks and cinders from the smoke and gases and convey them
to a suitable point of deposit, such as the ash-pan or smoke-box; and it consists in the
construction and arrangement of parts hereinafter described, and particularly pointed
out in the claims appended.
The invention will be fully understood from the following description when taken in
connection with the annexed drawings, in which―
Figure 1 represents a vertical sectional view of my improved spark-arrester
attached to a boiler of ordinary construction; Fig. 2, an enlarged sectional view of
the smoke-stack detached; and Fig. 3, a detail view of a supporting or re-enforcing
plate, which will be fully hereinafter described.
Referring to the drawings by letter, A designates the boiler, B the smoke-box or
chamber and C the smoke-stack, which in this instance consists of a short cylinder or
tube D, secured to and communicating with the smoke-box in the usual manner, and
having attached to its upper end an enlargement, E, which consists of a central
band, a, considerably larger in diameter than the tube D, having attached to or formed
integral with it the two contracted or conical portions b, the lower one of which is
secured to or formed integral with the short tube D, as shown. Extending into this
enlargement of the stack, through the upper end of the upper conical portion b, is the
outlet-tube F, which is bolted or riveted to an annular flange upon the upper edge of
the said upper contracted portion, and depends to a point about on a longitudinal line
with the center of the large band a. To the lower end of this tube is secured a short
tubular extension, G, which is made adjustable to adapt the invention to boilers of
different drafts, as will more fully hereinafter appear. Supported in the interior of
the enlargement by means of angle-irons c is a funnel, H, which has formed upon or
secured to its upper edge a band or short cylinder, I, which surrounds and extends
up a short distance above the lower edge of the outlet-pipe. To the lower or

page_text: discharge end of the funnel is secured a spark-conveying pipe, J. which is bent and
passed through an aperture in the short tube D, and is then carried down so as to
discharge the sparks and cinders into the smoke box or ash-pan, as shown, respec-
tively, in full and dotted lines in Fig. 1. Bolted to the interior of the tube D, over
the aperture through which the spark-conveyer passes, is a re-enforcing or supporting
plate, L, perforated for the passage of the conveyer. The object in thus securing
this plate is to assist in supporting the conveyer-tube and form a packing to prevent
the passage of smoke from the stack, also to strengthen the stack at the point where
it is weakened by the aperture.
The object in attaching the adjustable extension G, to the lower end of the outlet-
pipe is to provide means for adapting the invention for boilers or locomotives of
different drafts, the extension being lowered for a boiler of a strong draft, and
vice versa.
In operation the sparks and cinders are carried up around the funnel in the stack
by the draft, and impinge against the interior of the upper contracted portion of the
enlargement and are thereby deflected inwardly toward the outlet-pipe, whence they
drop down into the mouth of the funnel and are conveyed away by the pipe attached
thereto, as shown by the arrows in Fig. 2, the smoke and gases passing down a
short distance into the funnel, and from thence out through the oulet or discharge
pipe.
It will be observed that by means of the contracted upper portion of the enlarged
stack, and the regulating device attached to the lower end of the discharge-pipe and
projecting into the collecting-funnel, I obtain a thoroughly effective spark and cinder
arrester, which may be readily adjusted to suit boilers of different drafts, and one
which will not retard the draft sufficiently to impair the efficiency of the boiler.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :—
1. The combination of the boiler, the stack provided with an enlargement
consisting of the central large band, a, and the two oppositely-contracted portions b,
the funnel supported with mouth upward in the said enlargement and provided with
a conveyer-pipe at its lower end, and an extension, I, at its upper edge, the outlet-
pipe suspended concentrically within the said enlargement and extending into the
extension on the funnel a short distance, and the adjustable extension G, attached tö
the lower end of the outlet-pipe, all arranged substantially as and for the purpose
described.
2. In a spark-arrester and conveyer, the combination of the boiler, the stack
connected thereto and provided with an enlargement, C, consisting of the two
oppositely-contracted portions b, connected by a short central band, a, the funnel H,
supported with its mouth upward within the enlargement, and provided with a short
tubular extension, 1, on its upper edge, the bent conveyer-tube connected to the
lower discharge end of the funnel and passing out through the side of the stack,
the plate L, bolted to the stack, where it is perforated and provided with an aperture
for the passage of the conveyer-tube, the outlet-pipe suspended within the enlarge-
ment, as described, and the extension G, adjustably attached to the lower end of the
outlet-pipe, all arranged substantially as described.
Dated this 17th day of March 1888.