Improvements in Boiler Flues and Fire Boxes.
Year: 1896

page_text: Date of Application, 15th July, 1896
Complete Specification Left, 15th Apr., 1997-Accepted, 15th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Boiler Flues and Fire Boxes.
I, WILLIAM DEIGHTON, of Stourton House, Wakefield Road, Leeds, Manufacturer,
lo hereby declare the nature of this invention to be as follows:-
Various forms of corrugated flues or fire boxes have heretofore been proposed, such
for example as a uniform corrugation in which the outward corrugations are of the
same size and shape as the inward ones. Modifications of this form have also been
proposed in which the outward corrugations have a flat or curvel crown and are
connected by long sweeping curves or by a straight terminating in a curve or flat,
and it is to the later form that this invention more particularly relates.
According to this invention it is proposed to form a slight outward corrugation or
corrugations or bends at or about the centre of the inner main corrugation such
supplementary corrugations having much less height than the main corrugations and
tending to strengthen the flue or box against collapse and to break up any deposit of
sediment.
1000
PHILIP M. JUSTICE,
55 and 56 Chancery Lane, London, Chartered Patent Agent,
For the Applicant.
I, WILLIAM DEIGHTON, of Stourton House, Wakefield Road Leeds, Manufacturer,
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:-
Various forms of corrugated flues or fire boxes have heretofore been proposed, such
for example as a uniform corrugation in which the outward corrugations are of the
same size and shape as the inward ones. Modifications of this form have also been
proposed in which the outward corrugations have a flat or curved crown and are
connected by long sweeping curves or by a straight portion terminating in a curve or
flat, and it is to the latter form that this invention more particularly relates.
According to this invention it is proposed to form a slight outward corrugation or
corrugations or bends at or about the centre of the inner main corrugation such
supplementary corrugations having much less height than the main corrugations and
tending to strengthen the flue or box against collapse and to break up any deposit of
sediment.
In order that the present invention may be clearly understood reference is made
to the accompanying drawings in which Fig. 1 shows in section a part of a flue or fire
box the top of the main outward corrugations A of which are flat the metal between
taking an inwardly curved sweep as indicated at B and a slight outwardly curved

page_text: sweep as shown at C so as to form the supplementary corrugations. In Fig. 2 the
top of the main outward corrugations A are shown as being rounded while in Fig. 3
the part B between the main outward corrugation A and the supplementary
corrugation C is shown as being practically flat. It will be evident that instead
of being rounded the supplementary corrugation may be made flat at the top if
desired.
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 boiler flue or fire box the main corrugations of which are separated by one or
more supplementary corrugations of lesser height than the main corrugations
substantially as described.
PHILIP M. JUSTICE,
55 and 56 Chancery Lane, London, Chartered Patent Agent,
For the Applicant.