Improvements in Fuel Economisers or Feed Water Heaters for Steam Generators.
Year: 1896

page_text: Date of Application, 10th Feb., 1896
Complete Specification Left, 9th Nov., 1896-Accepted, 6th Feb., 1897
PROVISIONAL STEJEICATION.
'KOVISIONAL SPECIFICATION.
Improvements in Fuel Economisers or Feed Water Heaters for
Steam Generators.
We, JOSEPH PIMBLEY, of Lark Street Works, Farnworth near Bolton, in the
County of Lancaster, Engineer, and WILLIAM ANDREW ROTHWELL, of Primrose
Mill, Walkden, in the said county, Manufacturer, do hereby declare the nature of
this invention to be as follows :-
Our invention relates to improvements in fuel economisers or feed water heaters
for steam generators, and particularly to marine and other boilers in which the
available space is limited.
Our improvements consist essentially in mounting a fuel economiser substantially
of the type described in the Specification to Letters Patent 4404 of 1894
granted to one of us, namely to me the said Joseph Pimbley, or other suitable
type of economiser in such a way that the economiser can be moved into or out of
the smoke chamber or flue of the steam generator to which it is applied without
disturbing or breaking the feed water connection or interfering with the working
of the boiler.
In carrying our improvements into effect we mount the economiser tubes in a
suitable frame capable of being raised and lowered or otherwise moved by screws
and gearing or the like into and out of the furnace flue or smoke chamber and we
connect the inlet to the economiser tubes by a sliding pipe and stuffing box to the
pump or other source of supply and the outlet from the tubes through a sliding
pipe and stuffing box to the boiler so that the economiser can be moved into or
out of the flue or smoke chamber for cleaning, inspection or repair without
disconnecting any part or stopping the working.
1000
H. B. BARLOW & GILLETT,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Fuel Economisers or Feed Water Heaters for
Steam Generators.
We, JOSEPH PIMBLEY, of Lark Street Works, Farnworth near Bolton, in the.
County of Lancaster, Engineer, and WILLIAM ANDREW ROTHWELL, of Primrose
Mill, Walkden, in the said county, Manufacturer, 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 :-
Our invention relates to improvements in fuel economisers or feed water heaters
for steam generators, and particularly to marine and other boilers in which the
available space is limited.

page_text: Our improvements consist essentially in mounting a fuel economiser substantially
of the type described in the Specification to Letters Patent 4404 of 1894 granted
to one of us, namely to me the said Joseph Pimbley, or other suitable type of
economiser in such a way that the economiser can be moved into or out of the
smoke chamber or flue of the steam generator to which it is applied without
disturbing or breaking the feed water connection or interfering with the working
of the boiler.
In carrying our improvements into effect we mount the economiser tubes in a
suitable frame capable of being raised and lowered or otherwise moved by screws
and gearing or the like into and out of the furnace flue or smoke chamber and we
connect the inlet to the economiser tubes by a sliding pipe and stuffing box to the
pump or other source of supply and the outlet from the tubes through a sliding
pipe and stuffing box to the boiler so that the economiser can be moved into or
out of the flue or smoke chamber for cleaning, inspection or repair without
disconnecting any part or stopping the working.
In the accompanying sheet of drawings-
Figure 1 is a front elevation of the smoke box of a marine boiler to which our
improvements are applied, and Fig. 2 is a plan of the same.
In these views, a desigates the smoke box, and. 6 the funnel of the marine
boiler.
The fuel economiser or feed water heater is substantially of the construction
specified in the aforesaid Patent 4404 of 1894 and consists of the circulating pipes
or tubes e supported in the top plate or frame d and the scrapers e actuated by the
cross beam f and crank disc g.
According to our invention the top plate d acts as a cover to close that part of
the smoke box a into which the economiser tubes c and the scrapers e are fitted.
The top plate d also acts as a movable frame capable of being raised and lowered
with the economiser tubes and scrapers and connections into and out of the smoke
box as required.
This raising and lowering may be effected by auy convenient arrangement of
gearing or lifting tackle. For example, we show four screws h supported and free
to turn at the lower end in brackets a¹ secured to the smoke box a and at the upper
end similarly supported in a suitable frame i which may be further supported on
pillars if required. Each of these screws. h has a worm wheel j fixed upon it
and the four worm wheels j are driven by two pairs of worm shafts k of which
the first is driven by a belt, not shown, and a pair of fast and loose pulleys o or
equivalent driving gear and a hand wheel m may also be fixed on this shaft; the
second shaft k is driven from the first by bevel gears kl, shaft l, and bevel gears /*
and k'.
The economiser is coupled to the feed water inlet by a telescopic arrangement of
sliding pipes n and to the outlet by a similar arrangement n'.
On each of the screws his fitted a nut in a bracket d' secured to the top plate d,
consequently when the driving belt is on the fast pulley o the worm shafts k and
the screws are rotated to wind up the economiser out of the smoke box a the
sliding pipe joints n n allowing the economiser to rise without breaking the
connections or interfering with the working of the boiler or feed. When raised
into its highest position sliding plates or doors, not shown, are moved under the
economiser to make up and close the top of the smoke box whilst the economiser is
being inspected, cleaned or repaired, and when this has been done these sliding
plates or doors are withdrawn and the economiser is lowered by winding back
the gearing by means of the hand wheel m or if preferred the shaft might be
driven by a crossed belt and fast pulley, not shown, in the opposite direction.
Again, the band wheel m might be employed to both raise and lower the economiser
if required.
We have only shown our improvements applied to a marine boiler but it will be
readily understood that they are equally applicable to other types of boilers where
the available space is limited.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The combination with the furnace flue or smoke box of a marine or other
boiler, of a fuel economiser or feed water heater supported in a movable frame
and connected by sliding pipe connections to the inlet and outlet, and means such
as screws and gearing for raising and lowering said frame, substantially as herein
set forth.
2. The general construction, combination and arrangement of parts embodying
our improvements substantially as herein set forth.
Dated this 7th day of November 1896.
H. B. BARLOW & GILLETT,
17 St. Ann's Square, Manchester, Agents for Applicants.