An Improved Furnace Flue or Tube for Marine or Land Boilers.
Year: 1892

page_text: Date of Application, 30th June, 1892
Complete Specification Left, 30th Mar., 1893-Accepted, 6th May, 1893
PROVISIONAL SPECIFICATION.
An Improved Furnace Flue or Tube for Marine or Land Boilers.
I LUKE DINNIS HOGGART, of 33 Catherine Street, Sheffield, in the County
of York, Boiler Maker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved furnace flue or tube for marine or land
boilers so constructed as to be of great strength without having any undue
thickness or deformed parts to render the heating surface unequal. Furnace
flues or tubes of this description will be very light and can be easily repaired
when required.
According to this invention, I make the furnace flue or tube constricted or
narrowed in the direction of its length, said constriction being made in the shape
of the arc of a circle of suitable radius and being equally disposed on and around
the circumference of the furnace flue or tube.
Dated this 30th day of June 1892.
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Furnace Flue or Tube for Marine or Land Boilers.
I LUKE DINNIS HOGGART of 23 Catherine Road, late of 33 Catherine Street,
Sheffield, in the County of York, Boiler Maker, 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 :-
This invention relates to an improved furnace flue or tube for marine or land
boilers so constructed as to be of great strength without having any undue thickness
or deformed parts to render the heating surface unequal. Furnace flues or tubes
of this description will be very light and can be easily repaired when required.
According to this invention, I make the furnace flue or tube constricted or
narrowed in the direction of its length, said constriction being made in the shape
of the arc of a circle of suitable radius, and being equally disposed on and around
the circumference of the furnace flue or tube.
In the accompanying drawings
Figure 1 is a longitudinal section and Figure 2 is a sectional end elevation of a
furnace flue or tube constructed in accordance with my invention.
Figures 3, 4 and 5 shew my invention adapted to suit different types of furnaces.
Figure 3 is a furnace flue or tube such as is generally used for land boilers;
Figure 4 is a gathered in or bottle neck flue; and
Figure 5 is a wing flue.
To manufacture furnace flues or tubes of the shape shewn in Figures 1 and 2 of
the accompanying drawings, sheet or plate metal may be bent into a tubular form
and welded, and the cylinder so made then heated and formed into the desired shape
by passing it between rollers, but I do not restrict myself to any particular method
of making flues or tubes of the shape shewn.

page_text: 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 :-
A furnace flue or tube constricted or narrowed in the direction of its length,
said constriction being in the shape of a circular curve and equally disposed on and
around the circumference of the Blue or tube, substantially as described and shewn
and for the purpose stated.
Dated this 30th day of March 1802
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.