Improvements in Connecting or Coupling the Flanged Ends of Metallic Pipes or Tubes, which Improvements are applicable to the Securing of Closing Covers or Ends on Flanged Pipes or Tubes and other Flanged Articles.
Year: 1899

page_text: Date of Application, 3rd May, 1899
Complete Specification Left, 18th Jan., 1900-Accepted, 17th Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in Connecting or Coupling the Flanged Ends of Metallic
Pipes or Tubes, which Improvements are applicable to the Securing
of Closing Covers or Ends on Flanged Pipes or Tubes and other
Flanged Articles.
I, WILLIAM HENRY DUGARD, of Vulcan Mills, Bridge Street West, Birming-
ham, in the County of Warwick, Metal, Tube and Wire Manufacturer, do hereby
declare the nature of this invention to be as follows:-
My invention consists of the improvements hereinafter described in connecting
or coupling the flanged ends of metallic pipes or tubes, which improvements are
applicable to the securing of closing covers or ends on flanged pipes or tubes and
other flanged articles, such for example as metallic vessels, whereby a more
effectual gas and liquid tight junction is formed than is to be obtained by the
means ordinarily employed.
The pipe or other joints or couplings to which my invention relates consist
essentially of a channelled hoop or collar, of U shape in cross section, made in
two or more sector like parts the sides of the channelled hoop or collar being
parallel. The said channelled hoop or collar takes on the flanges on the ends of
the pipes to be connected together the ends of the sector like parts of the hoop
or collar being drawn and secured together by screw-pins or bolts passed through
bosses on the meeting ends of the said sector like parts of the hoop or collar.
Couplings or joints of the kind described when under great pressure yield
slightly and permit of escape of gas or liquid contained in the pipes or vessels
and the object of my invention is to remedy this defect.
I will describe my invention in connection with a pipe coupling or joint.
I make the flanges on the ends of the pipes to be joined slightly wedge shaped
externally, that is, thinner at the edge than at the part where the flange passes
into the cylindrical body of the pipe or tube. I make the hoop or collar prefer-
ably of a circular figure in cross section with a wedge shaped groove in its inner
side the said groove having a depth equal or nearly equal to one half the thick-
ness of the hoop or collar.
By the construction described the drawing of the two or more parts of the
hoop or collar together when on the flanges of the pipes, effects the drawing of the
flanges of the two pipes into close contact. Further, by making the hoop or
collar of the figure in cross section hereinbefore described and making the groove
therein of the depth indicated, the joined ends of the tubes are made capable of
resisting great internal pressure.
The application of my invention to the securing of covers or ends on flanged
pipes or tubes and other flanged articles differs in no essential respect from its
application to the coupling of the flanged ends of two pipes together as herein.
before described.

page_text: Improvements in Connecting or Coupling the Flanged Ends of Metallic
Pipes or Tubes, which Improvements are applicable to the Securing
of Closing Covers or Ends on Flanged Pipes or Tubes and other
Flanged Articles.
I, WILLIAM HENRY DUGARD, of Vulcan Mills, Bridge Street West, Birming
ham, in the County of Warwick, Metal, Tube and Wire Manufacturer, do hereby
declare the nature of my invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:
My invention consists of the improvements hereinafter described in connecting
or coupling the flanged ends of metallic pipes or tubes, which, improvements are
applicable to the securing of closing covers or ends on flanged pipes or tubes and
other flanged articles, such for example as metallic vessels, whereby a more
effectual gas, and liquid tight junction is formed than is to be obtained by the
means ordinarily employed.
The pipe or other joints or couplings to which my invention relates consist
essentially of a coupling ring, channelled hoop or collar of U shape in cross
section, made in two or more sector like parts the sides of the coupling ring,
channelled hoop or collar being parallel. The said coupling ring, channelled hoop
or collar takes on the flanges on the ends of the pipes to be connected together
the ends of the sector like parts of the ring, hoop or collar being drawn and
secured together by screw pins or bolts passed through bosses on the meeting
ends of the said sector like parts of the ring hoop or collar.
Couplings or joints of the kind described when under great pressure yield
slightly and permit of escape of gas or liquid contained in the pipes or vessels
and the object of my invention is to remedy this defect.
I will describe my invention in connection with a pipe coupling or joint.
I make the flanges on the ends of the pipes to be joined slightly wedge shaped
externally, that is, thinner at the edge than at the part where the flange passes
into the cylindrical body of the pipe or tube. I make the ring, hoop or collar
preferably of a circular or approximately circular figure in cross section with a
wedge shaped groove in its inner side, the said groove having a depth equal or
nearly equal to one half the thickness of the ring, hoop or collar..
Figure 1 of the accompanying drawing represents in longitudinal section the
ends of two pipes or tubes coupled together by a coupling ring, channelled hoop
or collar containing my improvements.
Figure 2 represents in end elevation my improved coupling ring, channelled
hoop or collar applied to the flanged ends of two pipes or tubes the said coupling
ring, channelled hoop or collar being made in two halves secured together by screw
nuts and bolts passed through lugs at the meeting ends of the two halves of the
said coupling ring, channelled hoop or collar.
Figure 3 represents in end elevation one of my improved coupling rings, chan-
nelled hoops or collars made in three sector like parts, two of the said sector like
parts being jointed or hinged to the other or middle sector like part.
Figure 4 represents in section the joined ends of the pipes or tubes and the
coupling ring, channelled hoop or collar at the meeting ends of two of the sector
like parts of the said coupling ring, channelled hoop or collar the said Figure 4
being drawn to a larger scale than Figures 1, 2 and 3.

page_text: Figure 5 illustrates the application of my invention to the securing of the end
cover on a pipe or chamber such as an engine cylinder or boiler manhole cover.
The same letters of reference indicate the same parts in the several figures of
the drawing.
a, a are the pipes or tubes and a², a² are the wedge shaped flanges formed on
the meeting ends of the same; b is the coupling ring, channelled hoop or collar
the said coupling ring, channelled hoop or collar having a circular or approxi-
mately circular figure in cross section as will be seen by reference to Figures 1
and 4.
The coupling ring, channelled hoop or collar b has in its inner side a trough
or annular groove 62 of a corresponding wedge shaped figure to that of the
meeting flanges a², a² of the two pipes or tubes a, a to be coupled together, the
said trough or annular groove 62 having a depth preferably somewhat less than-
one half the thickness of the coupling ring, channelled hoop or collar bas illus-
trated in Figures 1 and 4.
The coupling ring, channelled hoop or collar 6 is made in two or more parts
joined together preferably in the ways illustrated in Figures 2 and 3.
By the construction described and illustrated of the coupling ring, channelled
hoop or collar the drawing of the two or more parts of the ring, hoop or collar
together when on the wedge shaped flanges of the pipes or tubes effects the
drawing of the flanges of the two pipes or tubes into close contact. Further by
making the ring, hoop or collar b of the figure in cross section hereinbefore des-
cribed and illustrated and making the trough or groove therein of the depth in-
dicated the maximum strength in the said ring, hoop or collar is obtained at the
bottom of the trough or groove and the sides of the ring are practically incapable
of yielding, hence the joined ends of the tubes are made capable of resisting a
greater internal pressure than the joined ends of pipes or tubes coupled together
by coupling rings, channelled hoops or collars as heretofore constructed.
The application of my invention to the securing of covers or ends on flanged
pipes or chambers illustrated in Figure, 5 and to the securing of covers or ends
on other flanged articles differs in no essential respect from its application to the.
coupling of the flanged ends of two pipes together as hereinbefore described and
illustrated and corresponding parts in the said Figure 5 are marked with the
same letters of reference.
Having now particularly described and ascertained, the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
'
The improvements in connecting or coupling the flanged ends of metallic pipes
or tubes and in securing closing covers or ends on flanged pipes or tubes and
other flanged articles herein before described and illustrated in the accompanying
drawing, the said improvements consisting in making the meeting flanges of the
said pipes or tubes, or the flange of the pipe or tube or the like, and the edge of
the cover or closing end, of a wedge shaped figure and drawing and securing the
said flanges or the flange of the pipe or tube and edge of the cover or end together
by a coupling ring, channelled hoop or collar having a circular or approximately
circular figure in cross section the annular groove or trough in the said coupling
ring, channelled hoop or collar having a depth about one half the thickness of the
said coupling ring, channelled hoop or collar substantially as and for the purpose
herein before described and illustrated.
Dated the Wilto
1
T
1000