Improvements in Making Bends in Pipes or Flues.
Year: 1891

page_text: Date of Application, 16th Sept., 1891
Complete Specification Left, 16th June, 1892-Accepted, 16th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in Making Bends in Pipes or Flues.
I WILLIAM HILL of. 24A Silchester Road Notting Hill in the County, of
Middlesex Tinplate Worker do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to provide a very simple and cheap and yet
efficient method of making bends in all such pipes or flues as are made of
sheet metal.
To carry out this object the pipe or flue may be made in the usual manner or
otherwise of one or two or more sheets of metal and before. this sheet or these
sheets are rolled up to form the pipe in the place where the bend is to be made I
stamp out or otherwise create in the sheet or sheets certain corrugations in such
wise that when the pipe is formed and the bend therein is made these corrugations
are on each side of the inner part or surface of the bend and it is in consequence of
these corrugations being so and in such positions created that the bend can be
One two or more
made. The corrugations are formed in this manner.
corrugations of any desired shape and size are formed transversely to the line of
the pipe or flue and one or more similar or other corrugations are formed
longitudinally with the line of the pipe or flue and I consider that for many
purposes it is most convenient to arrange these corrugations in the shape of an H.
The longitudinal joint or joints of this pipe or flue can then be made in the usual
or other manner.
1001
COMPLETE SPECIFICATION.
Improvements in Making Bends in Pipes or Flues.
I WILLIAM HILL of 24A Silchester Road Notting Hill in the County of
Middlesex Tinplate Worker 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 object of this my invention is to provide a very simple and cheap and yet
extremely convenient and efficient method of making bends in all such pipes or flues
as are made of sheet metal.
In order the more clearly to explain this my invention and in what manner the
same is to be performed I refer to the accompanying drawing wherein I have
shewn an elevation of the bend of a sheet metal pipe or flue as constructed after
and in accordance with this my method and these my improvements.
The pipe or flue A may be made in any usual manner or otherwise of one or two
or more sheets of metal and before this sheet is or these sheets are rolled or bent
up or over as is customary in order to produce and form the pipe or flue in the
place or part thereof where the bend is to be made I stamp out or otherwise
create in any convenient manner and in and by any ordinary press or other
suitable apparatus in the sheet or sheets of metal certain corrugations in such
wise and in such positions that when the pipe or flue is produced and formed and
the bend therein is made these corrugations are on each side of the inner part
or surface of the bend as is shewn in the accompanying drawing close to and it
may be adjoining the lateral meeting edges of the plate or plates and it is solely
and exclusively in consequence of these corrugations being so and in such positions

page_text: created that it is possible that the bend can be made after and in accordance with
this my invention.
The corrugations are formed as deep or as high and as long and as broad as may
be desired or as may be necessary and suitable in each particular case having
regard to the diameter of the pipe or flue and to the angle that is to be described
by the proposed bend it being very obvious that the larger the diameter of the
pipe or flue and the sharper or more acute the angle that is to be described by
the proposed bend the greater in each and all of the aforesaid dimensions must be
the corrugations and these corrugations are arranged in the manner now to be
described. One or two or more suitable corrugations B formed as aforesaid are
arranged transversely to the line of the pipe or flue A and one or more suitable
corrugations D also formed as aforesaid are arranged longitudinally with the line
of the pipe or flue A and I would state that I consider that for many and
perhaps even for most purposes and on most occasions it is best and most con-
venient and effective to arrange the corrugations in the shape of an H as is
shewn in the accompanying drawing although at the same time I would have it
clearly understood as is indeed sufficiently evident that I do in no wise limit.
myself thereto for the corrugations may be created in such number and may be so
arranged in manner aforesaid as will best conduce in each particular case to the
desired end and object of making the required bend in the pipe or flue. The
corrugations are preferably raised on the outer side of the pipe or flue as is shewn
in the accompanying drawing so that the passage inside the pipe or flue and the
area of the same will not in any wise be interfered with.
When the corrugations have been so created as hereinbefore described and
the sheet or sheets has or have been rolled or bent up or over as aforesaid in
order to produce and form the pipe or flue the longitudinal joint or joints of this
pipe or flue can be made and finished off in any convenient and usual or other
manner as is customary at the present time or otherwise and the pipe or flue with
the required bend therein is ready for 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
The improvements in making bends in pipes or flues substantially as hereinbefore
described and shewn in the accompanying drawing.