Improvements in Flexible Suction Pipes for Fire Extinguishing and Pumping
Year: 1895

page_text: Date of Application, 29th Apr, 1895
Complete Specification Left, 29th Jan, 1896-Accepted, 14th Mar,
1896
PROVISIONAL SPECIFICATION
Improvements in Flexible Suction Pipes for Fire Extinguishing and
Pumping Apparatus
JAMES CADOUX HUDSON 75 Upper Ground Street Blackfriars Road London
Engineer do hereby declare the nature of this invention to be as follows
-
My improvements refer to flexible suction pipes for use with steam fire engines
and other pumps, and consists in making a flexible pipe formed to resist the external
pressure of the atmosphere when a partial vacuum exists within the pipe, and to
resist a considerable internal pressure, also to have a smooth internal bore and
possess considerable flexibility
1 form the
pipe
with an internal spiral of galvanized iron or steel or other metal,
triangular, half-round, or oblong section, the flat side section forming the bore, and
when half round spiral is used say half inch wide by a quarter thick, the coils would
be about half inch apart, on the outside of this coil, sheet rubber is formed with
certain thicknesses of canvas, two, three, four or other plies in thickness, and again
on the outside of this another sheet of rubber, or rubber and protection canvas
When placing on these layers of rubber and canvas the rubber towards the inside
of bore of pipe is worked down level with the inside bore of spital and gives the
pipe externally a corrugated form and as the plies of canvas and rubber are laid on
they follow this shape and when they are completed I lay on a coil of metal wire
gripping this pipe in the recesses of this external corrugation The pipe will then
resist external or internal pressure, it bas a smooth bore and is very flexible and
the outer metal coil keeps the rubber or covering firmly in position with reference
to the internal coil and prevents any creeping movement between one and the other
I can make the internal bore of the spiral somewhat larger than the shank of
coupling, and carry the spiral towards the end of pipe and over where the shank
will be placed, and line the inside of spiral with rubber at that part where it is
above the shank, and by tying in with copper wire or other means the pipe and the
spiral are fimly secured to the shank of coupling Other material than india-
rubber and canvas may be used for the outer covering
Dated this 29th day of April 1895
JAMES CADOUX HUDSON
COMPLETE SPECIFICATION
Improvements in Flexible Suction Pipes for Fire Extinguishing and
Pumping Apparatus
JAMES CADOUX HUDSON 75 Upper Ground Street Blackfriars Road London,
Engineer 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 improvements refer to flexible suction pipes for use with steam fire engines
and other pumps and consists in making a flexible pipe formed to resist the
external pressure of the atmosphere when a partial vacuum exists within the pipe-

page_text: My invention is represented by the accompanying drawings-the same letters
and references indicate the same parts in all the figures
Fig 1 is an elevation partly in section of one form of my improved flexible pipe
Figs 2 and 3 are sections of a piece of a pipe with other forms of spiral
Referring to Fig 1 (A) is a piece of a length of pipe with male coupling (B)
and female coupling (C) attached (D) is an internal spiral of half round
galvanized iron or steel or other suitable metal the flat side of spiral (D) facing to
and forming part of the bore of the pipe On the outer side of the spiral (D) 18
formed a rubber sheet or covering (E) and over this the plies of canvas (F) (F¹) (Í³)
which may be two, three, four or more in number, and on the outside of these
another sheet of rubber or rubber and protection canvas (E³) The rubber
covering (E) and the plies of canvas (F) (F¹) (F) are worked inwards when being
placed over the spiral (D) in such a manner that the inside of rubber covering (E)
is level with the flat side of spiral (D) and the bore of the pipe By this means
corrugated recesses (G) are formed on the exterior of the pipe (A)
When the laving on of the rubber (E) and ples of canvas (F) (F¹) (F2) and
outer covering (E) over the spiral (D) has been completed, I bind tightly over all
a coil of metal wire (H) gripping the pipe in the recesses (G) of the external
cori ugated sui face and al-o holding the rubber covering (E) and plies of
canvas (F) (F) (F2) and outer covering (E3) firmly in the proper position with
reference to the internal spiral (D) The rubber fixed between the spaces of the
spiral forms a smooth bore to the pipe and prevents the spiral from creeping, and
the outer corrugation gives considerable flexibil ty, moreover this section of spiral
wire allows the spiral to be made in one length throughout without joint, thus
ensuring uniformity in construction
The internal bore of spiral (D) may be larger than the shank (1) of the
coupling (C) and the sp ral (D) continued towards the end of pipe and over the
shank (I) of coupling (C), and at this place the spiral (D) has a rubber lining (J)

page_text: and by tying in with copper wire (K) or by other means the pipe (A) and
spiral (D) are firmly secured to shank (I) of coupling (C)
The section of the pipe and spiral may be as shewn at Fig 2 in which case the
piral is of a flat section, or of a triangular section as shewn at Fig 3, and
materials other than rubber or canvas may be used for the outer covering An
outer covering of canvas or other material (L) may be used as shewn at Fig 1 as a
further protection
Having now particularly described and ascertained the nature of my said inven-
tion and in what mannei the same is to be performed I declare that what I
claim is
The improved form of flexible pipe formed with internal spiral of triangular,
half round, or oblong section, and in covering same with rubber and canvas, and
working the covering inwards to fill up interstices between spiral so as to form a
smooth bore to pipe, and with external corragation, and with or without external
wire binding for the purposes and in the manner illustrated and described
Dated this 29th day of January 1896
JAMES CADOUX HUDSON