Year: 1898

page_text: I, WILLIAM PENMAN, of the Firm of Penman and Company, Boilermakers,
Caledonian Iron Works, Strathclyde Street, in the County of the City of Glasgow
do hereby declare the nature of my invention to be as follows:-
This invention has reference to improvements in and relating to water tube
boilers.
According to my improvements I use three drums, an upper steam generating
drum, and two parallel lower drums with dished out ends. The tubes in the lower
drums are preferably set at an angle and expanded into tube plates in chambers at
their ends, and portable doors are fitted on both chambers for easy access of removing
and renewing tubes. The top and bottom drums are connected by a series of short
preferably curved tubes expanded into these drums and a number of which may
be stay tubes. or these drums may be joined together by rivetted steel tubes as
desired.
In the larger class of boilers the back end of lower drums may have a manhole
door, so as to get access through it to expand the tubes instead of requiring to
remove the main door.
The tubes would be put in from front of boiler, and in the event of any of the
tubes giving way they can easily be replaced, or in the event of any section giving
out the tubes in that section can be stopped by means of an inside valve arrange-
ment such as a lift valve covering all the top ends of tubes in upper drum and
operated from outside of drum thus allowing the other section of the boiler to
remain at work while repairs are being executed in the defective section.
A tube
if not required to be replaced can be plugged or stopped after the usual marine style.
There will also be two outside circulating or stiffening larger tubes on each section.
With this arrangement the boiler can be repaired without removing the casing or
the brick work. The connecting tubes, if desired, can be expanded in place by any
A mud drum will be fixed at
handy man or without the need of skilled labour.
the lower end of the back chamber connecting both sections.
The boiler can be shipped in pieces and so will be easy for transport.
In the event of being confined for space one of the lower drums only need be
fitted up and used, and still the arrangement of the boiler would be similar.
Dated the 1st day of March 1898.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.

page_text: I, WILLIAM PENMAN, of the Firm of Penman and Company, Boilermakers,
Caledonian Iron Works, Strathclyde Street, in the County of the City of Glasgow,
do hereby declare the nature of my invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement, that is to say:-
This invention has reference to improvements in and relating to water tube
boilers.
And in order that my said invention and the manner of carrying same into
practice may be properly understood I havo hereunto appended 2 sheets of
explanatory drawings in which Figure 1 is a longitudinal section partly broken
away of a water tube boiler as fitted with my improvements, while Figures 2 and 3
represent transverse sections of same as looking at the left and right hand ends
respectively.
Referring to these drawings:
According to my improvements I use three drums, an upper steam generating
drum A, and two parallel lower drums each consisting of two end chambers BB
and CC connected by the tubes X, which are expanded into tube plates such as B¹
in the chambers, and portable doors such as B2 are fitted in the chambers for
easy access of removing and renewing tubes. The top and bottom drums are
connected by a series of short preferably curved tubes D expanded into these
drums, and a number of which may be stay tubes, or these drums may be joined
together by rivetted steel tubes as desired.
In the larger class of boilers the back end of lower drums BC may have a
manhole door, so as to get access through it to expand the tubes instead of requiring
to remove the main door.
The tubes may be put in from front of boiler, and in the event of any of the
tubes giving way they can easily be replaced, or in the event of any section giving
out the tubes in that section can be stopped by means of an inside valve arrange-
ment such as a lift valve E in a seat chamber E3 covering all the top ends of tubes D
in upper drum A and operated by a spindle E¹ and hand wheel E2 from outside of
drum thus allowing the other section of the boiler to remain at work while repairs
are being executed in the defective section. A tube if not required to be replaced
can be plugged or stopped after the usual marine style. There are also two outside
circulating or stiffening larger tubes F on each section and each fitted with a
valve at F. With this arrangement the boiler can be repaired without removing
the casing or the brick work. The connecting tubes, if desired, can be expanded
in place by any handy man or without the need of skilled labour. A mud drum G
will be fixed at the lower end of the back chamber connecting both sections BC.
The boiler can be shipped in pieces and so will be easy for transport.
In the event of being confined for space one of the lower drums B or C only
need be fitted up and used, and still the arrangement of the boiler would be
similar.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
-
First. In water tube boilers the method of isolating any section, consisting in
fitting valves to shut off the circulating water from the tubes, substantially as
set forth

page_text: Second. In water tube boilers, the combination comprising steam and water
circulating drums, connecting tubes, and isolating valves, substantially as set
forth.
Dated the 1st day of December 1898
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.