Year: 1887

page_text: Date of Application, 1st June, 1887
1 Complete.Left, 1st Mar., 1888
Complete Accepted, 6th Apr., 1888
RE
The object of my invention is to manufacture steam boilers in an improved manner,
whereby a large heating surface is provided, and circulation of the water, and acces-
sibility to all parts are provided for.
My improved steam boilers are of the externally fired, horizontal, compound multi-
tubular type.
The outer shell is cylindrical, the furnace being placed under the external shell, at
the front end. Near the back end of the outer shell I fit a mud pocket with a blow
off pipe at the bottom. This mud pocket forms a suitable support to the back end
of the boiler. The boiler is set in masonry, in which the external flue is formed. The
heated gases from the furnace pass along the under part and sides of the outer shell
and round each side of the mud pocket. They then pass upwards to a horizontal flue
leading from the back and nearly to the front end of the boiler. This return flue
has curved crown and bottom plates, with semi-cylindrical sides, and is fitted with
cross, vertical, diagonal, conical or other suitable water tubes, which promote the
circulation of the water, absorb heat, and act as stays to the flue. This horizontal flue
terininates near the front end in a chamber, from which the heat is carried to
the back end of the boiler by a number of small tubes, above and at the side of
the flue.
The large internal flue is connected with the back end of the boiler by means of an
external angle-iron ring; and sufficient space is provided between the bottom of the
flue and the external shell for cleaning out the boiler; a man hole being fitted at the
front end for that purpose. This arrangement also secures the presence of a large
body of water over the furnace, which prevents the water assuming a spheroidal state,
which is kown to exist in boilers with only a limited amount of water over the fire.

page_text: The ends of the boiler are stayed with gusset stays, and the top plate of the front
chamber is, strengthened with a strong bar of 1 iron, and (if necessary) further
supported by means of vertical stays connected to the crown of the shell. The sides
of the front chamber are secured with screwed stays properly rivetted at the ends, or
secured with back nuts at each end of the stay; and a suitable number of stay tubes
are fitted to secure the tube plates.
The boiler may be set horizontally, or on a slight incline, and suitable doors are
fitted for gaining access to the tubes and for other purposes.
GEO. DOWNING,
Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Construction of Steam Boilers.
I, THOMAS HIPKINS, of The Cottage, Heneage Street, Spitalfields, in the County
of Middlesex, Boiler maker, do hereby declare the nature of my said invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The object of my invention is to manufacture steam boilers in an improved manner,
whereby a large heating surface is provided and circulation of the water and acces
sibility to all parts are provided for.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings in which similar letters of
reference indicate corresponding parts.
Fig. 1 is a front elevation of my improved boiler, Fig. 2 is a longitudinal section,
and Fig. 3 a transverse section.
My improved steam boilers are of the externally fired, horizontal, compound multi-
tubular type.
The outer shell a is cylindrical b is the furnace, placed under the external shell,
near the front end, c is a mud pocket fitted with a blow-off pipe d at the bottom.
This mud pocket c forms a suitable support to the back end of the boiler.
An external
flue e e is formed in the masonry in which the boiler is set. The heated gases from
the furnace pass along the under part and sides of the outer shell and round each
side of the mud pocket. The heated gases then pass upwards, at the back of the
boiler, to the internal horizontal flue f, leading from the back end to the chamber gat
the front end of the boiler. This return flue has a curved crown h and semi-
cylindrical sides i. i. The flue f is fitted with cross, vertical, diagonal, conical, or
other suitable water tubes k. k which promote the circulation of the water, absorb
heat, and act as stays to the flue. From the chamber g the heated gases pass through
the tubes m m to the flue n leading to the chimney.
The space o between the bottom of the flue f and the external shell a, is convenient
for cleaning out the boiler; a man-hole being provided at the front end for that
purpose. This arrangement also secures the presence of a large body of water over
the furnace, which prevents the water assuming a spheroidal state, which sometimes
occurs in narrow spaces where there is but a limited quantity of water.
The ends of the boiler are stayed with gusset stays p p.
The plate is usually made sufficiently narrow to dispense with staying, but (when
necessary) it may be stayed by any of the usual means.
The side plates s of the front chamber are secured with screwed stays (not shewn
in the drawings) properly rivetted at the ends, or secured with back nuts at each end
of the stay.
Any suitable number of stay tubes m may also be fitted to stay the tube plates.
The boiler may be set horizontally or on a slight incline and suitable doors are
fitted for gaining access to the tubes, and for other purposes.

page_text: Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The manufacture and use of externally fired, horizontal, compound multitubular
steam boilers, substantially as hereinbefore described and shewn on the'drawings.
2. The general construction, combination and arrangement of the several and
respective parts together constituting my improvements in the construction of steam
boilers, substantially as herein before described and shewn on the drawings.
1
1000