IMPROVEMENTS IN THE ARRANGEMENT AND CONSTRUCTION OF STATIONARY STEAM BOILERS
Year: 1884

page_text: I THOMAS CALVERLEY of Grimshawe Street Boiler Works Burnley, in the
County of Lancaster, do hereby declare the nature of my said Invention for
IMPROVEMENTS IN THE ARRANGEMENT AND CONSTRUCTION OF STATIONARY STEAM
BOILERS, to be as follows:-
My invention relates to stationary boilers. It is found in practice that in a two
flued boiler, the water above the flues become heated so as to generate steam, whilst
the water below is at a temperature comparatively cold; resulting in an unequel
expension or contraction of the top and bottom plates of the boiler. To remedy
this defect, I place an additional flue longitudinally through the boiler, and from
end to end thereof, in such a manner as to displace the greater bulk of water below.
I also provide two mud or man holes, one on each side of the additional flue for
cleaning and repairing purposes.
The flues may be constructed in the ordinary mannar, and each provided with a
fire box.
By the application of this additional flue, steam will be generated more rapidly;
fuel economized, and perfect circulation and even temperature of water ensured
above and below the flues.
Dated thi A
T
THOMAS RICHMOND,
Agent for the Applicant.

page_text: I, THOMAS CALVERLEY of Grimshawe Street Boiler Works, Burnley in the
County of Lancaster, do hereby declare the nature of my invention for
"IMPROVEMENTS IN THE CONSTRUCTION AND ARRANGEMENT OF STATIONARY STEAM
BOILERS," and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
One serious
My invention relates more particularly to stationary steam boilers.
defect in the double flued boiler is, the existance of a large body of water below
the flues. The heated gases, or products of combustion passing along and acting,
principally upon the upper plates of the flues, causes the water above to be heated
to such a degree as to generate steam, whilst the water below is at a temperature
comparatively cold; resulting in an unequal expansion and contraction of the top
and bottom plates of the boiler. To displace the greater portion of water below
the flues, I introduce an additional flue, longitudinally through the boiler. I also
provide a mud or manhole on each side of this additional flue, for cleaning and
repairing purposes.
And in order that my invention may be properly understood and readily carried
into effect, I will proceed to describe the accompanying sheet of drawings, reference
being had to the figures and letters marked thereon. Fig. 1, is a front elevation,
Fig 2, an elevation reverse to Fig 1. and Fig 3 a longitudinal section of a steam
boiler, in which views are represented the additional flue, and the mud or man
holes constructed in accordance with my invention.
The flues A. B and C, as will be seen by referring to figures 1. 2 and 3 extend
longitudinally through the boiler, and communicate with the chamber D. The
lower flue C. is provided for the displacement of the greater portion of the water
below the flues A and B, and whilst ensuring a better circulation and even
temperature of water, also presents a considerable increase of heating surface
inside the boiler. The heated gases, or products of combustion arising in the
flues A. B and C, are caused to pass downwards in the chamber D and along the
underside of the boiler in the passage E, from whence they enter, through openings
near the fireing end of the boiler into the ordinary side flues, and backwards to the
main flue F to the chimney. The mud or man holes G and H on each side of the
flue C as seen in Fig 1, are provided for cleaning and repairing purposes. By
the application of the flue C, steam will be raised more rapidly, fuel economized,
and an equal expansion and contraction of the top and bottom plates of the boiler
effected.
Having now described and ascertained the nature of my said invention, and in
what manner the same is to be performed, I desire it to be understood, that I claim
as secured to me under the above in part recited Letters Patent,
The additional flue C and the mud or man holes G and H arranged in the
manner and for purposes described and set forth.
Dated this 16th day of September 1884.
THOMAS CALVERLEY.