Improvements in Steam Superheating Apparatus for Steam Generators.
Year: 1896

page_text: Date of Application, 10th Feb., 1896
Complete Specification Left, 9th Nov., 1896-Accepted, 6th Feb. 1897
IONAL SPEC
ION.
Improvements in Steam Superheating Apparatus 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 steam superheating apparatus for steam
generators and particularly to marine and other boilers in which the available
space is limited.
Our improvements consist essentially in mounting a steam superheating apparatus
preferably constructed substantially like the feed water heater described in the
Specification to Letters Patent 4404 of 1894 granted to one of us, namely, to me
the said Joseph Pimbley, in such a way that the superheater 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 steam connection or interfering with the
working of the boiler.
In carrying our improvements into effect we mount the superheater 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 outlet from the boiler by a sliding pipe and stuffing box to the
superheater tubes and the outlet from the superheater tubes by a similar sliding
connection to the cylinder so that the superheater 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.
Dated this 8th day of February 1996
H. B. BARLOW & GILLETT,
Agents for Applicants.
COMPLETE SPECIFICATION.
Improvements in Steam Superheating Apparatus 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 steam superheating apparatus for steam
generators and particularly to inarine and other boilers in which the available space
is limited.
Our improvements consist essentially in mounting a steam superheating apparatus

page_text: preferably constructed substantially like the feed water heater described in the
Specification to Letters Patent 4404 of 1894 granted to one of us, namely, to me
the said Joseph Pimbley, in such a way that the superheater 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 steam connection or interfering with the
working of the boiler.
In carrying our improvements into effect we mount the superheater 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 outlet from the boiler by a sliding pipe and stuffing box to the
superheater tubes and the outlet from the superheater tubes by a similar sliding
connection to the cylinder so that the superheater 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 designates the smoke box and b the funnel of the marine
boiler.
The steam superheater is preferably constructed like the feed water heater
specified in the aforesaid Patent 4404 of 1894 and consists of the circulating pipes
or tubes c supported in the top plate or frame d and the scrapers e actuated by the
cross beam 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 superheater 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 superheater tubes and scrapers and connections into and out of the smoke
box as required.
This raising and lowering may be effected by any 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 aud 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; fixed upon it and the
four worm wheels ; 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 is driven from the first by bevel gears, shaft l, and bevel gears 1
and .
The superheater is coupled to the steam outlet from the boiler by a telescopic
arrangement of sliding pipes n aud the outlet from the superheater tubes to the
cylinder by a similar arrangement n¹.
On each of the screws h is 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 superheater out of the smoke box a the
sliding pipe joints n n allowing the superheater to rise without breaking the
connections or interfering with the working. When raised into its highest position
sliding plates or doors, not shown, are moved under the superheater to make up
and close the top of the smoke box whilst the superheater is being inspected,
cleaned, or repaired, and when this has been done these sliding plates or doors are
withdrawn and the superheater is lowered by winding back the gearing by means
of the hand wheel m or if preferred the shaft k might be driven by a crossed
belt and fast pulley, not shown, in the opposite direction. Again, the hand
wheel m might be employed to both raise and lower the superheater 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 steam
generators where the available space is limited.

page_text: 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 combination with the furnace flue or smoke box of a marine boiler or
other steam generator, of a steam superheating apparatus supported in a movable-
frame and connected by sliding pipe connections at 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.