Improvements in or relating to the Flues of Boiler Furnaces.
Year: 1894

page_text: Date of Application, 9th Mar., 1894
Complete Specification Left, 8th Dec., 1894-Accepted, 2nd Feb., 1895
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Flues of Boiler Furnaces.
I, JOHN HENRY EASTWOOD, of 124, South Parade, Cleckheaton, in the
County of York, Boiler Setter, do hereby declare the nature of this invention to
be as follows:-
This invention relates to improvements in or appertaining to the flues of
Lancashire and Cornish boilers and other similar large boiler flues and its object is
to enable the flues to be made of ample size to afford ready admission for inspection
and repairs and at the same time keep the heated gases passing through the flues
close against the plates to be heated.
For this purpose I partition off a portion of the flue or flues by means of one or
more transverse partitions hinged to the sides of the flue or otherwise made
movable to give ready access thereto. These partitions are so arranged that they
practically close the bottom or side of the flue furthest away from the boiler thus
leaving a passage of reduced size adjacent to the boiler and consequently the
heated gases passing through the flue are kept close to the plates of the boiler.
The said partitions may be made of iron or other suitable material. Instead of
fixing the partitions at right angles to the flue they may be more or less inclined
thereto.
In the case of circular or internal flues surrounded by heating surface I may
employ partitions in the form of discs supported approximately concentric with the
flue by two or more radial projections bearing against the plates. These partitions
may be made of fire-brick or fire-clay if the heat is excessive.
Dated this 8th day of March 1894.
DRACUP & NOWELL,
Bradford, Agents.
Improvements in or relating to the Flues of Boiler Furnaces.
I, JOHN HENRY EASTWOOD, of 124, South Parade, Cleckheaton, in the
County of York, Boiler Maker, 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 improvements in or appertaining to the flues of
Lancashire and Cornish boilers and other similar large boiler flues, and its object is
to enable the flues to be made of ample size to afford ready admission for inspection
and repairs and at the same time keep the heated gases passing through the flues
close against the plates to be heated.
I
For this purpose partition off a portion of the flue or flues by means of one or
more transverse partitions hinged to the sides of the flue or otherwise made
movable to give ready access thereto. These partitions are so arranged that they
practically close the bottom or side of the flue furthest away from the boiler thus
leaving a passage of reduced size adjacent to the boiler and consequently. the
heated gases passing through the flues are kept close to the plates of the boiler.
The said partitions may be made of iron or other suitable material. Instead of
fixing the partitions at right angles to the flue they may be more or less inclined
thereto.
:

page_text: In the case of circular or internal flues surrounded by heating surface I may
employ partitions in the form of discs supported approximately concentric with the
flue by two or more radial projections bearing against the plates. These partitions
may be made of fire-brick or fire-clay if the heat is excessive.
Reference is to be had to the accompanying sheet of drawings forming a part of
this Specification in which similar letters of reference indicate corresponding parts
in each of the figures.
Figure 1, represents a cross section on the line a, b Figures 2 and 4 of a
Lancashire boiler and its flues with my improvements applied thereto.
Figure 2, represents a longitudinal section of the same with the boiler partly
in full.
Figure 3, represents a front elevation with one side in section on the line y,
Figures 2 and 4.
Figure 4, represents a plan view with the flue shown in section on one side.
Recesses or pockets A are formed in the outer walls A" of the side flues B. and
the partitions or doors C are hinged in these recesses. The partitions C may be
formed of cast iron frames C2 filled in with fire-brick panels C³. The frames C²
are hinged by the pin D at the bottom pivoted in the foot plate D2 and by the rod
or pivot D3 at the top (which may be cast in the frame C2) passing through the top
of the flue. To enable the partitions to be adjusted or opened and closed from
the outside bevel wheels E may be fixed on the top of the pivots D3 and these
wheels may be arranged to engage the bevel wheels E' secured on the shafts E³
mounted in suitable bearings along the top outside each of the flues. A hand
wheel F is fixed on the end of each of the shafts E3 by which they may be turned
to bring the partitions C into the position shown in the drawings, or to turn them
back into the recesses A so as to give free access to the flues for cleaning or other
purposes.
Recesses or pockets A³ are formed in the bottom of the flues B2 in which recesses
partitions C are pivoted, in a similar manner to C, by pivots D and D. The
pivots D project into the passage or opening G formed in the brick-work parallel
to the flue, and bevel wheels E are fixed on their ends arranged to engage the
bevel wheels E' secured on the longitudinal shaft E' mounted in suitable bearings
in such passage.
The shaft E extends into the usual pit or opening H at the front
of the boiler and a hand wheel F2 is fixed on the end by which it may be turned to
move the partitions C₁.
The combustion chamber or internal flues B³ B³ may be fitted with concentric
discs C Figures 1 and 2. These discs may consist of quadrantal pieces of fire-
brick having horns or radial projections C at each end to bear against the sides of the
chamber and support the discs in position. A central opening C7 (Figure 1) may
be made through the discs when they are fitted close to Galloway tubes to allow
the gases to play on said tubes.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is :
1. A boiler flue having one or more hinged or movable partitious adapted to
partly close the flue and direct the heated gases against the walls of the boiler,
substantially as herein shown and described.
2. An internal boiler flue having one or more concentric discs adapted to partly
close the flue and direct the heated gases against the sides of the flue, substantially
as herein shown and described.
Dated this 6th day of December 1894.
DRACUP & NOWELL,
Bradford, Agents.