Improvements in Steam Generators.
Year: 1889

page_text: Date of Application, 8th Apr., 1889
Complete Specification Left, 1st Jan., 1890-Accepted, 15th Mar.,
1890
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
JAMES WATT BOULTON Engineer Ashton under Lyne Lancashire do hereby declaré
the nature of this invention to be as follows:-
1 fix in the upper end of the common cross tube as fixed in the flues of boilers, a tube
of suitable length to carry the hot water boiled in the cross tube to the surface before
coming in contact with the cold water. The tube may be made in one piece with
suitable provision for attaching to the flue, and the top may be fitted with a suitable
means to prevent priming.
I intend closing the end of the tube at the top, and having one or more openings at
the side in order that the water may be cast downwards and not into the steam space.
The above is an explanation of the means to prevent priming.
Duted this 4th dont : 1000
JAMES WATT BOULTON.
COMPLETE SPECIFICATION.
Improvements in Steam Generators.
JAMES WATT BOULTON Engineer Ashton under Lyne in the County of Lancaster
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 :-
My said Invention relates to an improved means for circulating water in boilers and
consists in extending the upper ends of the cross tubes which are sometimes fixed in
the furnaces of boilers, the water heated in the cross tubes is allowed to rise to the
surface by means of the extension tube before coming in contact with the colder
body of water which is between the top of the flue and the working level and as
the extension causes an upward current, and the lower ends of the tubes being also
extended downward allows the colder water from the lower part of the boiler to
take the place of the water evaporated in the cross tube thereby causing greater
circulation.
The extensions may be made of the same material as the cross tube or any suitable
material. In some cases to prevent priming I would fix a cap on the top of the
extension and have an opening at the side so that the water would be cast
downwards.
The extensions are provided with a flange or hugs for attaching to the flue when
they are made separate from the cross tube or where the tube is made in one piece I
would fix an angle iron joint on the flue or tube.
Where the tubes cross the flue horizontally as in a vertical boiler I would make the
extension of a U so that the side of the fire box or flue shall form the 4th side. In
the case of a vertical boiler I would put the extension on one side and turned upwards
and the other downwards.
It is understood that my extension tube is applicable to boilers with one or more
Alues or where two or more flues shall come into one and have their tubes vertically or
at an angle. And now to make my Invention more clearly understood we will refer
to drawing No. 1 which shews a half front elevation of a flued boiler. A is the
shell B the flue containing the cross tubes C. D. to which are fixed at the upper ends
the extensions EF F is shown in part section with opening at side to prevent
priming G. H. are the lower extensions.
Drawing No. 2 shews the application of the extensions to a boiler with the tubes
horizontally A is the shell B fire box C cross tube D also cross tube in section
Price fl

page_text: :
E is an extension turned downwards and feeds the cross tube C and is discharged thro
the extension F G is an extension shewn in dotted lines H fire hole door.
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
As means for obtaining an improved circulation of water in steam boilers by
means of extending the cross or heating tubes at one end or both to the or near to the
surface of the working level of water over the flue or flues and by extending the lower
ends to or nearly to the bottom of the boiler shell.
Dated this 31st day of December 1889.