Improved Multitubular Vertical Boiler for Steam Lighters and Winches.
Year: 1889

page_text: Date of Application, 17th Oct., 1889
Complete Specification Left, 8th July, 1890-Accepted, 23rd Aug., 1890
PROVISIONAL SPECIFICATION..
Improved Multitubular Vertical Boiler for Steam Lighters and
Winches.
ROBERT MILLER, 26 & 28, Arthur Street, Greenock in the County of Renfrew
Engineer and Boiler:naker do hereby declare the nature of this invention to be as.
follows:-
:-
The boiler is of the ordinary vertical type with semicircular or flat top and stayed.
It has the outer shell and inner shell or firebox with water space between. The
firebox to extend two thirds of the height of the boiler.
The improvement consists chiefly in placing inside of the firebox a large semicircular
cross pipe, with flat bevelled top flanged at both ends and riveted to the firebox,.
with tubes from the top of said pipe up to the crown of firebox.
The flame is outside of the aforesaid cross pipe and passes upwards, and around,
and through between the vertical tubes, and is carried up through the boiler with
an uptake or pipe, the water being inside the said cross pipe and vertical tubes.
It is an improvement on the ordinary vertical boiler with cross pipes used for
steam lighters and winches at sea :—
1st. By giving twice the amount of heating surface.
2nd. By giving easy access for cleaning and keeping free from scale.
3rd. By the internal arrangements it requires no smoke box or doors, as in some
of the multitubular boilers now in use.
171
11000
COMPLETE SPECIFICATION.
Improved Multitubular Vertical Boiler for Steam Lighters and
Winches.
ROBERT MILLER, 26 & 28 Arthur Street, Greenock, in the County of Renfrew,
Engineer and Boilermaker 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 boiler is of the ordinary vertical type with semicircular or flat top A, and
stayed. With outer shell and iuner shell or firebox B with water space between.
The firebox to extend two thirds of the height of the boiler.
The Improvement consists chiefly, in placing inside of firebox a large semicircular
cross pipe C with flat bevelled top D, flanged at both ends and rivetted to firebox B,
with tubes E from the top of said pipe up to the crown of firebox.
The flame is outside of the aforesaid cross pipe and passes upwards and around
and through between the vertical tubes, and is carried up through the boiler with an
uptake or pipe F, the water being inside the said cross pipe and vertical tubes.
It is an improvement on the ordinary vertical boiler with cross pipes used for
yachts, steam lighiers and winches at sea."
1st. By giving twice the amount of heating surface.
2nd. As the flame passes the water spaces at right angles it is more effective.
3rd. As the furnace bars are nearly at the bottom of the boiler, steam can be
raised in a very much shorter time, and the circulation is better, also there is no
unequal strain on the hottom of the boiler.
4th. As the flame is not contracted and is ascending all the time, there is

page_text: perfect combustion and a very much better draught than in the ordinary marine
boiler.
5th. By giving easy access for cleaning and keeping the boiler free from scale.
6th. By the internal arrangements it requires no smoke box or doors, as in some
of the multitubular boilers now in use.
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,
That it is an improvement on the ordinary vertical boiler with cross pipes used for
yachts, steam lighters and winches at sea :-
1st. By giving twice the amount of heating surface.
2nd. As the flame passes the water spaces at right angles it is more effective.
3rd. As the furnace bars are nearly at the bottom of the boiler steam can be raised
in a very much shorter time, and the circulation is better, also there is no unequal
strain on the bottom of the boiler.
4th. As the flame is not contracted and is ascending all the time, there is
perfect combustion and a very much better draught than in the ordinary marine
boiler.
5th. By giving easy access for cleaning and keeping the boiler free from scale.
6th. By the internal arrangements it requires no smoke box or doors, as in some
of the multitubular boilers now in use.
ROBERT MILLER.