Improvements in Smoke-consuming Furnaces.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Smoke-consuming Furnaces.
I, DAVID CLEGG, of 3226 Sansom Street, in the City of Philadelphia, State of
Pennsylvania, one of the United States of America, Salesman, do hereby declare the
nature of the said Invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement:-
The object of my Invention is to construct devices for attachment to locomotives by
which the smoke and cinders are carried from the stack into the ash-pit and there
consumed.
In the accompanying drawings, Fig. 1, is a longitudinal section of sufficient of a
locomotive to illustrate my Invention; Fig. 2. is a transverse section through the
smoke-stack on the line, 1-2, Fig. 1; Fig. 3. is a transverse section on the line
3-4 Fig. 1; Figs. 4 and 5. are sections of the smoke stack on the line, 5-6,
Fig. 2. showing the draft regulator in different positions; Fig. 6. is a perspective
view of the upper portion of the stack; Fig. 7. is a section of the stack on the line,
7—8, Fig. 1; and Fig. 8 is a view of a modified form of stack.
A, is the boiler of the locomotive, B, the combustion chamber, C, the ash pit, 'and,
b, the grate. D, is the smoke-box, having the usual exhaust nozzles from the
cylinders, and, E, is the stack.
The stack in the present instance is of the peculiar form shown in Figs. 1, and,-2,
and is provided with three passage ways, e, e¹, e². The central passage way; e, com-
municates with the smoke-box, D, at the bottom and communicates with the down
flues, e, e, at the top. A hood, F, is placed over the upper ends of the flues, and has
dividing plates, ff, which pass down each of the flues, so that the smoke and cinders
from the combustion chamber pass up the central flue and are guided down the outer
flues, el, e, by the hood, F.
The side flues communicate with a longitudinal flue, E¹, through passages, E³, one
at each side of the smoke-box. The passage, E', extends to and communicates with
the ash-pit, as shown in Fig. I, so that any smoke or cinders that pass through the
passages e, el, and E, are directed into the ash-pit, the larger cinders falling to the
bottom of the ash-pit, while the smoke and lighter cinders pass through the fuel on
the grate, b, and are consumed.
In order to create sufficient draft to carry the cinders and smoke into the ash-pit, I
provide a funnel-shaped head, G, situated at the upper end of the smoke-stack. This
head has a flaring mouth, g, and is preferably provided with a screen, g¹². On the
upper portion of the head is an opening, h, provided with a valve, H, hinged at, h¹.
This valve has an arm, h, which is connected, through the medium of rods, i, and a
bell-crank lever, i, with a hand lever, I, in the cab of the engine, so that when the
locomotive is standing-as, for instance, at a station-the engineer can raise the valve, H,
and permit the smoke to pass out of the stack. As soon as the engine pulls out
from the station the engineer reverses the lever, I, thus closing the valve, H, so that
air passes through the head, G, and into the side passages, e¹, e², thus causing a
forced draft and forcing the cinders and smoke into the ash-pit.
To increase the draft where circumstances require, I cut an opening, a, in the
front of each side passage, e¹, e², and insert in the opening pivoted slats, a', con-
nected after the manner of a window blind, one of the slats having an arm, a²,
linked to a lever, a³, which in turn is connected to the rod, i, so that when the valve, H,
is closed, as shown in Fig. 4, the slats cause the air to pass downward into the side
Blues, e, e, and thus add to the force of the draft in carrying the cinders and smoke
to the ashpit; but when the valve is raised to the position shown in Fig. 5, the slats
are reversed and the air is permitted to pass upwards into the side flues, e¹, e³, thus
iding in carrying the smoke out through the top of the stack. These slats can be
Price fid l

page_text: worked independently of the valve, H, if desired, so that they can be closed when it is
required to cut off the air through the openings, a.
In the modifications shown in Fig. 8, instead of the down passages being at the
sides of the central passage, e, said down passages are in front and rear of the central
passage, and in this case only the front down passage is provided with slats.
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. The combination of the combustion chamber and ash pit, with the smoke stack
open at its upper end, and having communicating up and down flues with a deflecting
hood, and a valved inlet opening in the down flue, substantially as hereinbefore
described.
•
2. The combination of the smoke stack provided with up and down flues, the deflect-
ing hood, the head having an air inlet opening communicating with the down flues,
and a valved opening in the upper portion of said head, and mechanism for operating
the valve from the cab of the engine, substantially as hereinbefore described.
3. The combination of the smoke stack having up and down flues, with openings
in said flues, and slats in each of said openings for directing air into the stack and
creating a draft in the down flues for carrying the smoke to the ash pit, substantially
as herein before described.
4. The combination of the stack having up and down flues, openings in said
down flues, with pivoted slats in said openings, said slats being controlled from
'the cab of the engine so as to regulate the draft, substantially as herein before
⚫ described.
5. The combination of the smoke stack, the up and down flues therein, a valved
opening in the top of said stack, and openings in the down flues, with pivoted
slats therein, a rod connected to the slats and to the valve rod, said rod being
"connected to a lever in the cab, so that on the operation of said lever the slats
and valve will be operated simultaneously, substantially as hereinbefore described.
Dated this 23rd day of November 1889.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicant.