Improvements
Year: 1897

page_text: I, ROBERT NEILSON, of 1, Caledonia Place, Paisley, Renfrewshire, Engineer, 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. The tubes in the lower drums are prefer-
ably 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 re-
newing tubes. The top and bottom drums are connected by a series of short
curved tubes expanded into these drums and a number of which will 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 to tubes through it, instead of requiring to remove the
main door.
Dated the 9th day of December 1907
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating to Water Tube Boilers.
I, ROBERT NEILSON, of 1, Caledonia Place, Paisley, Renfrewshire, Engineer, 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 in writing, reference being made to the accompanying sheet of illus-
trative drawings :-
This invention has reference to improvements in and relating to water tube
boilers.
And in order that my said invention may be properly understood I have here-
unto appended a sheet of explanatory drawings in which Figure 1 is a front
elevation partly in section and Figure 2 is a side sectional elevation of a water
tube boiler constructed in accordance with my improvements.
Referring to these drawings, according to my improvements I use three drums,
an upper steam generating drum A, and two parallel lower drums consisting of
drum shaped chambers B connected by tubes B¹. The tubes B' in the lower
drums are preferably set at an angle and are expanded into tube plates B in the
[Price 8d.1

page_text: chambers B at their ends, and portable doors are fitted on both chambers at D
for easy access for removing and renewing tubes. The top drum A and the
bottom drums B are connected Ly a series of short tubes E which may be straight
or curved expanded into these drums and a number of these tubes may be stay
tubes; or the drums may be connected together by rivetted steel tubes two or
more in number as desired.
In the larger class of boilers the door of the back or lower drum B is preferably
rivetted on permanently and a manhole C is fitted therein to permit of access to
the interior for the purpose of expanding the tube ends in the tube plate, the
tubes being entered from the front or higher end. The usual mud drum may be
fitted below the lower chambers.
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
1 claim is:
First. In water tube boilers the construction or general arrangement and com-
bination of the parts all substantially as herein described and illustrated by the
accompanying drawings.
Second. In water tube boilers the combination with an upper steam drum of
parallel lower drums consisting of groups of inclined water tubes connected to end
drums or chambers and connecting tubes to steam drum all substantially as herein
described and illustrated by the accompanying drawings.
Third. In water tube boilers of the class described the fitting of the lower water
chambers or drums with manhole doors all substantially as herein described and
illustrated by Figure 2 of the accompanying drawings.
Buted the 9th September
1090.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.