Improvements relating to Draught Regulators în Locomotive and other Furnaces.
Year: 1888

page_text: Improvements relating to Draught Regulators în Locomotive and
other Furnaces.
We COLOMAN LASZGALLNER, Engineer in Chief of the Imperial Hungarian Rail-
ways and ADOLF NÖHRING Tenhnical Engineer both of Budapest in the Empire of
Austria Hungary 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 :-
This invention relates to locomotive and other furnaces and its object is a regulator
of the draught, whereby when the furnace door is opened, the flue or chimney may
be automatically closed partially or wholly so that the injurious effect of sudden
inrush of cold air against the boiler tubes etc. on opening the door may be avoided
and also some economy in fuel attained.
To this end a butterfly or like valve or valves is provided in the chimney and is
connected by suitable rods and levers to the furnace door so that the valve is closed by
the opening of the furnace door and opened by the closing of the latter.
The accompanying drawings illustrate a mode of performing the invention.
Fig. 1 is an end elevation of the furnace door and face plate and a cross section of
the smoke stack.
Fig. 2 is a half end elevation of the face plate and furnace door showing parts
broken away in Fig. 1.
Fig. 3 is a plan view of a part of the rod and lever mechanism.
Fig. 4 is a horizontal section, and
Fig. 5. is a side elevation of the smoke stack.
To the pintle a of the furnace door, which is rigid therewith is attached a crank
arm 6 extending in such direction as to make an angle of about 45° to the furnace
door. On brackets e d Fig. 2 is journalled the rod f carrying near its lower end a
crank arm g equal in size to the crank b with which it is connected by the rod c so
as to lie parallel with said crank b. The shaft f carries at its upper end a rectangular
frame v connected laterally thereto. In the frame v slides a block carrying a wrist
pin, a screw spindle v¹ having a crank handle traverses the block and frame so that

page_text: the block may be moved to and held at a suitable distance from the shaft whereby
the arc of the movement of the wrist pin thereon about the axis of the shaft is
increased or diminished.
The wrist pin is connected by the rod k with a crank arm on the shaft
(Fig. 5).
On the stack (Fig. 4) are two butterfly valves tu of a shape corresponding together
to the interior of the stack and the blast or exhaust therein.
The said valves are connected respectively to the shafts lo traversing the stack and
carrying the sectors n m geared with each other.
When the furnace door is opened the rods and levers bcgfv krock the sectors mn
and so close the valves t u in proportion as the door is opened.
The shutting of the door opens the valves tu.
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
In locomotive and other furnaces,
1. The combination with a furnace door of a valve or valves in the smoke stack
and suitable mechanism whereby the valves are opened by closing the door and closed
by opening the door for the purpose set forth.
2. The combination of a furnace door and valves t u with mechanism substantially
as illustrated and described connecting said door and valves for the purpose set
forth.
Dated this 3rd day of May 1000.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.
Agents to Applicants.