Improvements in or relating to Fuel Economisers for Heating Feed Water for Boilers.
Year: 1898

page_text: Date of Application, 9th Feb.. 1898
Complete Specification Left, 4th Apr., 1898-Accepted, 16th July, 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to Fuel Economisers for Heating Feed
Water for Boilers.
We, JAMES TAYLOR STATON PIMBLEY and WILLIAM PIMBLEY, both of the Firm
of Pimbley Brothers, of Albert Works, Moses-Gate, near Bolton, in the County
of Lancaster, Engineers and Fuel Economiser Makers, do hereby declare the
nature of our said invention to be as follows:
This invention refers to improvements in or relating to fuel economisers for
heating feed water for boilers and consists in constructing a force circulating
high-pressure fuel economiser of steel, wrought-iron, or other suitable metallic
materials. The vertical metal pipes are provided with tapered and screwed
ends which fit into top and bottom metallic boxes, and are secured in position by
means of caps screwed on the outer ends of the same, thereby dispensing with
internal bolts and the like. Near the top and bottom ends of each metal tube
is provided a side hole or opening for water to pass through into the metallic
boxes. The tubes are connected at the bottom ends by means of short pipes or
bottom boxes each prepared to receive the ends of two pipes and so on throughout
the entire range to produce thorough circulation. The method of circulation is
as follows:- Water is supplied to the top metallic box from whence it passes
through a side hole or opening, then down a tube and out through a side hole
or opening into a short connecting pipe from whence it passes through an open-
ing or hole on the opposite side at the bottom end of the next tube and up the
same and cut through a side hole or opening near the top end, then through
an aperture in the top metallic box which connects with the hole or opening in
the next pipe or tube, when the operation is repeated in like manner throughout
the entire range of pipes forming the economiser, from whence it passes on to the
boiler or boilers. The outside of the vertical metal pipes or tubes are fitted with
scrapers somewhat similar to those now in use, and are operated up and down
by means of a quadrant actuating a pinion fitted on a shaft mounted in bearings
on the framework which carries the scraper chain pulleys. On this shaft is fitted
a bevel wheel gearing with a bevel wheel mounted on the chain pulley centre
shaft, thus producing the rising and falling operations of the scrapers on the
vertical pipes forming the economiser. In adapting our invention to marine
boilers we dispose in the smoke box one or more rows of vertical metal pipes,
provided with the requisite valves for regulating the operations of the same.
The cavity or chamber containing the aforesaid pipes is provided with a damper
or dampers for regulating the operations of the same. The pipes may be pro-
vided with scrapers operated automatically or otherwise as desired or required;
being driven from any convenient source.
Dated the 8th February 1898
"

page_text: Improvements in or relating to Fuel Economisers for Heating Feed
Water for Boilers.
We, JAMES TAYLOR STATON PIMBLEY and WILLIAM PIMBLEY, both of the Firm
of Pimbley Brothers, of Albert Works, Moses-Gate, near Bolton, in the County
of Lancaster, Engineers and Fuel Economiser Makers, do hereby declare the
nature of our said 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 refers to improvements in or relating to fuel economisers for
heating feed water for boilers and consists in constructing a force circulating
high-pressure fuel economiser of steel, wrought-iron, or other suitable metallic
materials. The vertical metal pipes are provided with tapered and screwed
ends which fit into top and bottom metallic boxes, and are secured in position by
means of caps screwed on the outer ends of the same, thereby dispensing with
internal bolts and the like. Near the top and bottom ends of each metal tube
is provided a side hole or opening for water to pass through into the metallic
boxes. The tubes are connected at the bottom ends by means of short pipes or
bottom boxes each prepared to receive the ends of two pipes and so on throughout
the entire range to produce thorough circulation. The method of circulation is
as follows: Water is supplied to the top metallic box from whence it passes
through a side hole or opening, then down a tube and out through a side hole
or opening into a short connecting pipe from whence it passes through an open-
ing or hole on the opposite side at the bottom end of the next tube and up the
same and out through a side hole or opening near the top end, then through
an aperture in the top metallic box which connects with the hole or opening in
the next pipe or tube, when the operation is repeated in like manner throughout
the entire range of pipes forming the economiser, from whence it passes on to the
boiler or boilers. The outside of the vertical metal pipes or tubes are fitted with
scrapers somewhat similar to those now in use, and are operated up and down
by means of a quadrant actuating a pinion fitted on a shaft mounted in bearings
on the framework which carries the scraper chain pulleys. On this shaft is fitted
a bevel wheel gearing with a bevel wheel mounted on the chain pulley centre
shaft, thus producing the rising and falling operations of the scrapers on the
vertical pipes forming the economiser. In adapting our invention to marine
boilers we dispose in the smoke box one or more rows of vertical metal pipes.
provided with the requisite valves for regulating the operations of the same.
The cavity or chamber containing the aforesaid pipes is provided with a damper
or dampers for regulating the operations of the same. The pipes may be pro-
vided with scrapers operated automatically or otherwise as desired or required;
being driven from any convenient source.
DESCRIPTION OF DRAWINGS.
Fig. 1 Sheet 1 is a longitudinal elevation of our improvements in or relating
to fuel economisers for heating feed water for boilers. Fig. 2 an end view of
Fig. 1. Fig. 3-Sheet 2-a part elevation of connecting pipes on the opposite
side to that shown in Fig. 1.-Fig. 4 an enlarged sectional view of bottom end of
pipes and metallic boxes.-Fig. 5 an enlarged sectional view of top end of
pipes and metallic boxes.-Fig. 6 an enlarged plan of one set of scrapers and
carrying frame.-Fig. 7 an enlarged end view of scrapers and carrying frame.
Fig. 8 Sheet 3-front elevation of our invention fixed in the smoke-box of a
marine boiler, and Fig. 9 a sectional side view through line A' B¹ in Fig. 8.
In all the figures the same letters are employed to indicate corresponding parts.

page_text: A are vertical metal pipes or tubes; B top metallic boxes; C bottom metallic
boxes; D scrapers; E inlet pipe; G outlet pipe; H stop valve; I escape or
relief valve; J drain tap, and K driving pulley.
The vertical pipes A may be composed of steel, wrought iron, or other suitable
metallic materials, and are provided with tapered ends L which fit into the top
and bottom metallic boxes B and C, being secured in position by means of the
internally threaded metallic caps M screwed on the outer ends of the said pipes A,
thereby dispensing with internal bolts and the like. The vertical pipes A are
provided near their top and bottom ends with the side holes or openings N
and N for water to pass through into the metallic boxes B and C. The vertical
metal pipes or tubes A are connected at their bottom ends by means of the short
pipes or bottom boxes C, each being prepared to receive the ends of two pipes
as shown in the drawings, and so on throughout the entire range to produce
thorough circulation. Water to be heated is forced by a pump or other means
under pressure into the pipe E from whence it passes through the side hole or
opening N in the tapered top end, from whence it passes down the tube or pipe A,
then through the bottom side hole or opening N¹, through the passage in the
bottom metallic box C, then up the pipe or tube A. and so on alternately from
pipe to pipe as indicated by the arrows » -until the entire section or
range of pipes have been traversed in the first section, from whence the water
passes through the connecting pipe P to the pipes A in the second section wherein
the cycle of operation is repeated and then the heated water passes out through
the stop valve H and on to the feed pipe of the boiler or boilers. For the purpose
of blowing through without interfering with the action of the boiler we provide
the drain tap J and pipe J¹; the latter leading to a sewer or other convenient
place. If desired the sections may be duplicated as often as necessary.
For the purpose of cleaning and removing soot and other non-conducting sub-
stance from the outside of the pipes A and to maintain the efficiency of the
economiser, each pipe A is provided with the metallic scrapers D provided with
the arms or projections R which fit between the arms S on the scraper frame T,
the latter being constructed in halves and bolted together as shown in Figs. 6
and 7. To each scraper frame T is connected the rod U by means of the key U1;
the upper end of each rod U being attached to the chain W by means of the
pin Y. The chain W extends upwards to the outside of the economiser and
passes over the chain pulley Z and down to the rod U of the next set of scrapers,
thus connecting two sets of scrapers together, by which, when one set of scrapers
is ascending the other is descending and vice-versa. The chain pulleys Z are
keyed on the shafts or centres a mounted in the fixings or bearings 6 secured
by the bolts c to the cross fixings d. The latter are supported from the top
metallic boxes B by the standards f. The standards or uprights f are provided
with the bearings 9 in which is mounted the shaft h carrying the worms j. The
worms gear with the worm wheels k on the shaft or centre a carrying the chain
pulleys Z. On one end of the shaft h is fixed the spur driving wheel m. The
spur driving wheel m and shaft h are driven in alternate directions to produce
the up and down motions of the scrapers D by means of the spur pinions p and q.
The spur pinions p and q are mounted on the pivoted arm or levert by the pins
or centres u. The pivoted arm or lever t is loosely mounted on the shaft or
centre S in the bearing and fixing or hanger w; the latter being carried from
the top cross fixings d. The shaft or centres is fitted with the worm y gearing
into the worm wheel z, the latter being loosely. mounted on the pin or centre a
secured to the fixing b³ by the nut c³. The fixing 6 is attached to the upright
or standard f in any convenient manner. The upper side of the worm wheel z
is provided with the cam m² which operates the pin or centre n³ attached to the
end E2 of the pivoted arm or lever t. The shaft S is rotated by the strap pulley K
driven from any convenient source. The economiser pipes are fixed and built
round or enclosed by brickwork and provided with flues and dampers in the usual
manner.

page_text: In adapting our invention to marine boilers 'the pipes 'A are placed in the
smoke-box M and are supported by the bearer No' as shown in Figs. 8 and 9;
and are provided with the scrapers D attached to the carrying frame T, the
latter being operated up and down by the screwed rods U. The screwed rods U
are mounted in the threaded boss y of each worm wheel y7%; the latter being
loosely mounted in the bearings 7 in the fixing d. The screwed rods U are
secured to the frame T carrying the scrapers D by which they are prevented from
turning or rotating, thereby ensuring of their up and down movements when the
worm wheels y are actuated by the worms y on the shafts. The shaft s is
actuated by the spur gear consisting of the wheels m, p, and 9, the lever t and
cam m² as before described, the whole being driven by the pulley K with a belt
from any convenient source, or by any other suitable or desired driving gear.
The inlet pipe E is provided with the valve H to allow of the passage of water
to the economiser in which case the valve H2 is closed. When water has passed
through the economiser pipes A it flows out through the pipe G to the feed
valve G into the boiler. When the economiser is not required, or in case of
repairs the valve H is closed and the valve H2 is open, thereby allowing water
to be fed direct into the boiler through the feed valve X6. The cavity or cham-
ber D is provided with one or more dampers Z' for regulating the heat to the
economiser.
In carrying out our improvements in or relating to fuel economisers for heating
feed water for steam boilers we would have it understood that we do not confine
ourselves to the precise details and configuration of the parts shown and described
as the same may be varied or modified without departing from the principle of
our invention to suit the various positions and conditions under which the same
may be employed.
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 general arrangements, constructions, and combination of parts compos-
ing our improvements in or relating to fuel economisers for heating feed water
for steam boilers, consisting of the pipes A suspended from the top metallic
boxes B, and the connecting bottom pipes C, being held in position by the inter-
nal threaded caps M, the whole. being connected, applied, and operating sub-
stantially as described and as illustrated in the annexed drawings.
2. In combination with fuel economisers the construction of the scrapers D
and carrying frame T together with the gearing for operating the same up and
down automatically and intermittently, substantially as described and as illus-
trated in the drawings.
F
3. In combination with scraper gearing for fuel economisers the use and con-
struction of the reversing apparatus. consisting of the spur wheel m and the
pinions p and q mounted on the pivoted lever t, the latter being operated by
the cam m² actuating the levert to place the pinions p and q in and out of gear
in successive order to automatically. effect the up and down motions of the
scrapers D, rods U, and the chains W through the. intervening gearing, the
whole being applied and operating substantially as described and illustrated.
4. The general arrangement, construction, and combination of parts compos-
ing our improvements, in or relating to economisers for heating feed water for
marine boilers, consisting of the pipes A suspended from the beam or bearing No,
and provided top and bottom with the connecting pipes B and C, being held in
position by the internal threaded caps M, the whole being connected, applied,
and operating substantially as described and as illustrated in the annexed
drawings.
5. In combination with fuel economisers for marine boilers the construc-
tion of the scrapers D, together with the gearing for operating the same up and.

page_text: down automatically and intermittently, substantially as described and as illus-
trated.
6. In combination with scrapers for fuel economisers for marine boilers the
use of the apparatus for operating the same, substantially as described and as
illustrated in the annexed drawings.
EDMUND CHADWICK,
Agent.