Improvements in Steam and Water Drums, and in their Application to Water-tube Steam Boilers.
Year: 1888

page_text: Date of Application, 31st Aug., 1888
Complete Specification Left, 30th May, 1889-Accepted, 13th July, 1889
Improvements in Steam and Water Drums, and in their Application
to Water-tube Steam Boilers.
I, JOHNSON MILLS of Keppel Road Chorlton-cum-Hardy in the County of
Lancaster Engineer do hereby declare the nature of this invention to be as follows:-
The improvements which are the subject of this invention relate to the formation of
parts of the shell, and also the end plates of steam and water drums, in water-tube
steam boilers: The object of this invention is to construct said steam and water drums
in a manner that the pockets to which are connected the several nests of tubes of
which water-tube steam boilers are composed, may be formed of part, or may
otherwise constitute a part of the drum shell, and also of the end plate. In
constructing a steam and water drum according to this invention I form a pocket of
wrought iron, mild steel, or other suitable material which I place in a position near
the front end of said steain and water drum, and arranged so as to form a strengthening
ring or rings for the drum, with the pocket extending therefrom on the underside: I
form these pockets either of a plate or plates, or of rings which are dished out or
pressed, or otherwise constructed to the required shape and rivetted to shell of drum,
and constructed and attached so as to form part of said shell by being rivetted thereto :
I attach to said pocket the front headers of tubes by means of ferrules or short
connecting tubes which may be placed either inclined or horizontally and thus permit
the nipples to be readily examined from the outside of front end of boiler: I construct
a pocket in combination with the end plate at the rear end of drum by bending or
shaping said plate to the required form: I connect to this pocket the back headers of
tubes by means of short circulating tubes or nipples which can be examined at the
outside or rear end of boiler by removing the cap opposito each tube: By those
means increased strength in the upper steam and water drum is obtained, and additional
facilities for examination and repairs.
COMPLETE SPECIFICATION (AMENDED).
Improvements in Steam and Water Drums, and in their Application
to Water Tube Steam Boilers.
I, JOHNSON MILLS of Keppel Road Chorlton-cum-Hardy in the County of
Lancaster Engineer 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 :-
-
The improvements which are the subject of this invention relate to the formation
of parts of the shell and also the end plates of steam and water drums in water tube
steam boilers.
The object of this invention is to construct said steam and water drums in a manner
that the pockets to which are connected the several nests of tubes of which water tube
steam boilers are composed may be formed of part or may otherwise constitute a part
of the drum shell and also of the end plates.
In order more clearly to describe this my invention I have annexed hereunto two

page_text: :
sheets of drawings in the soveral views therein shown similar letters refer to similar
parts On sheet 1, Fig. 1, is a side view of the front end of a steam and water drum
constructed according to this invention: Fig. 2 is a transverse section of same on the
line A. A. Fig. 1. Fig. 3 is a view-drawn transversely through transverse section
on the line C. C. Fig. 1 showing formation of drum ring in combination with
pocket Fig. 4 is a side view and Fig. 5 a vertical section on the line D. D. Fig. 3
of the combined drum ring band pocket b¹. In constructing a steam and water drum
according to this invention I form angular rings b and c in pairs and either of mild
steel or other suitable material: I make these angular or flanged rings of the same
diameter internally as the external diameter of the shell of the steam and water drum a
in order that said rings may fit thereon and be rivetted or otherwise secured to the
steam and water drum so as to form strengthening rings at the joint the joint where
the two portions of the shell of the said drum are united. At the underside of the
rings band C.
I form pockets and c¹ either from plates which may be welded to suid
rings, and which may be dished out or pressed, or by other suitable means constructed
to the required shape. I rivet or otherwise join together the flanges 2 and c² and by
these means the combined rings b and c and pockets and el form part of the shell of
the steam and water drum a. I attach to the pocket the front headers of the inclined
water tubes e by means of ferrules or short connecting tubes d ordinarily known us
nipples which enter holes d¹ in the pocket b and may be placed either inclined, or
horizontally as shown on the drawing, and thus this construction permitting the
nipples to be readily examined from the outside of the front end of the boiler. Fig. 6
is a modification of my invention and represents partly in sectional elevation and
partly in side view of the front end of a steam and water drum in which the ring is
a solid disc or plate shown constructed in combination with a pocket b₁ so as to form
for rivetting to a ring c and a pocket c' as above described the disc b forming the front
end plate of the drum a. On sheet 2 of the drawings Fig. 7 is a side view of the rear
end of a steam and water drum constructed according to this invention. Fig. 8 is an
outside end view of the same. Fig. 9 is transverse an inside end view of the combined
end plate and pocket drawn through taken on the line E E. Fig. 7. Fig. 10 is a side
view of Fig. 9 and Fig. 11 a vertical section on the line F. F. I construct a
pocket in combination with the end plate h at the rear end of the steam and water
drum a by shaping and bending a plate of mild steel or other suitable material to the
required form, and either rivetting or welding the joints: the end plate may either
be dished or may be flat as shown on the drawing. I connect the back headers or of
the tubes e to the pocket by means of short circulating tubes or nipples which can
be examined at the outside or rear end of the boiler by removing the cap k one of
which is placed opposite each tube or nipple: By these means increased strength in
the upper steam and water drum a is obtained and additional facilities for examination
and repairs are obtained. The pockets and c¹ in combination with the drum rings b
and cand the pocket h¹ in combination with the end plate h may when required be
ormed at any other suitable angle relatively with said drum rings b and c and end
plate h other than us that shown on the drawing.
h
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
1st. In a water tube steam boiler the combination of a pocket for connecting the
several nests of tubes of which water tube steam boilers are composed, and the bands
which connect the joints or form strengthening rings of steam and water drum by the
formation of said bands or rings and pockets so as to constitute a part of steam and
water drum by constructing them substantially in the manner as herein before described
with reference to Figs. 1 to 5.
2nd. In a water tube steam boiler the combination of the end plates of steam and
water drum with a pocket for connecting the front headers of tubes so that said pocket
may constitute a part of steam and water drum, by constructing it substantially in the
manner as herein before described with reference to Fig. 6.

page_text: 3rd. In a water tube steam boiler the combination of the end plates of steam and
water drum with a pocket for connecting the back headers of tubes so that said pocket
may constitute a part of steam and water drum by constructing it substantially in the
manner as herein before described with reference to Sheet 2 of the Drawings annexed.
Dated this 20th day of Nov 1889
THOS. PRESCOTT,
Agent for Applicant.

page_text: Date of Application, 31st Aug., 1888
Complete Specification Left, 30th May, 1889-Accepted, 13th July, 1889
PROVISIONAL SPECIFICATION.
Improvements in Steam and Water Drums, and in their Application
to Water-tube Steam Boilers.
I, JOHNSON MILLS of Keppel Road Chorlton-cum-Hardy in the County of
Lancaster Engineer do hereby declare the nature of this invention to be as follows:-
The improvements which are the subject of this invention relate to the formation of
parts of the shell, and also the end plates of steam and water drums, in water-tubo
steam boilers: The object of this invention is to construct said steam and water drums
in a manner that the pockets to which are connected the several nests of tubes of
which water-tube steam boilers are composed, may be formed of part, or may
otherwise constitute a part of the drum shell, and also of the end plate. In
constructing a steam and water drum according to this invention 1 form a pocket of
wrought iron, mild steel, or other suitable material which I place in a position near
the front end of said steam and water drum, and arranged so as to form a strengthening
ring or rings for the drum, with the pocket extending therefrom on the underside:
form these pockets either of a plate or plates, or of rings which are dished out or
pressed, or otherwise constructed to the required shape and rivetted to shell of drum,
and constructed and attached so as to form part of said shell by being rivetted thereto :
I attach to said pocket the front headers of tubes by means of ferrules or short
connecting tubes which may be placed either inclined or horizontally and thus permit
the nipples to be readily examined from the outside of front end of boiler: I construct
a pocket in combination with the end plate at the rear end of drum by bending or
shaping said plate to the required form: I connect to this pocket the back headers of
tubes by means of short circulating tubes or nipples which can be examined at the
outside or rear end of boiler by removing the cap opposite each tube :
means increased strength in the upper steam and water drum is obtained, and additional
facilities for examination and repairs.
Dated this 30th day of August 1888
By these
THOMAS PRESCOTT,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam and Water Drums, and in their Application
to Water Tube Steam Boilers.
I, JOHNSON MILLS of Keppel Road Chorlton-cum-Hardy in the County of
Lancaster Engineer 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 :-
The improvements which are the subject of this invention relate to the formation
of parts of the shell and also the end plates of steam and water drums in water tube
steam boilers.
The object of this invention is to construct said steam and water drums in a manner
that the pockets to which are connected the several nests of tubes of which water tube
steam boilers are composed may be formed of part or may otherwise constitute a part
of the drum shell and also of the end plates.
In order more clearly to describe this my invention I havo annexed horeunto two
sheets of drawings in the several views therein shown similar letters refer to similar
parts: On sheet 1, Fig. 1, is side view of front end of steam and water drum
constructed according to this invention: Fig. 2 is a transverse section of same on
line A. A. Fig. 3 is a view drawn transversely through the line C. C. showing
n 4

page_text: I
formation of drum ring 6 in combination with pocket 6: Fig. 4 is side view and
Fig. 5 vertical section on line D. D. of the combined drum ring b and pocket 6'. In
constructing a steam and water drum according to this invention I form angular
rings b and c in pairs and either of mild steel or other suitable material: I make these
angular or flanged rings of the same diameter internally as the external diameter of
steam and water drum a in order that said rings may fit thereon and be rivetted or
otherwise secured to steam and water drum so as to form strengthening rings at
the joint of the said drum: At the underside of rings b and c, I form pockets b₁ and c¹
either from plates which may be welded to said rings, and which may be dished out or
pressed, or by other suitable means constructed to the required shape. I rivet or
otherwise join together the flanges 62 and 2 and by these means the combined
rings b and c and pockets 6 and form part of shell of steam and water drum a.
attach to pocket 6 the front headers of tubes e by means of ferrules or short connecting
tubes d which may be placed either inclined, or horizontally as shown on drawing, and
thus permit the nipples to be readily examined from the outside of front end of boiler.
Fig. 6 is a modification of my invention and represents part sectional elevation and
part side view of front end of steam and water drum in which the ring is shown
constructed in combination with pocket & so as to form the front end plate of drum a:
On sheet 2 of drawings Fig. 7 is side view of rear end of steam and water drum
constructed according to this invention. Fig. 8 is an end view of the same.
is transverse view of combined end plate and pocket drawn through line E E. Fig. 10
is side view and Fig. 11 vertical section on line F. F. I construct a pocket ¹ in
combination with the end plate h at rear end of steam and water drum a by shaping
and bending a plate of mild steel or other suitable material to the required form, and
either rivetting or welding the joints the end plate h may either be dished or bo
flat as shown on drawing. I connect the back headers or tubes e to the pocket ¹ by
means of short circulating tubes or nipples which can be examined at the outside or
rear end of boiler by removing the cap opposite each tube: By these means
increased strength in the upper steam and water drum a is obtained and additional
facilities for examination and repairs. The pockets b' and c¹ in combination with drum
rings b and c and the pocket in combination with ond plate may when required
be formed at any other angle relatively with said drum rings b and c and end plate h
than as shown on drawing.
Fig. 9
may
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
1st. In a water tube steam boiler the combination of a pocket for connecting the
several nests of tubes of which water tube steam boilers are composed, and the bands
which connect the joints or form strengthening rings of steam and water drum by the
formation of said bands or rings and pockets so as to constitute a part of steam and
water drum substantially in the manner as herein before described.
2nd. In a water tube steam boiler the combination of the end plates of steam and
water drum with a pocket for connecting the front headers of tubes so that said pocket
may constitute a part of steam and water drum, substantially in the manner as hercin
before described.
3rd. In a water tube steam boiler the combination of the end plates of steam and
water drum with a pocket for connecting the back headers of tubes so that said pocket
may constitute a part of steam and water drum substantially in the manner as herein
before described.
THOS. PRESCOTT,
Agent for Applicant.