Improvements in the Mouthpieces and Lids, Doors, or Covers of Gas Retorts and Ovens and other Vessels and Articles Requiring Gas and Air Tight Joints.
Year: 1888

page_text: Date of Application, 11th June, 1888
Complete Specification Left, 25th Feb., 1889
Complete Specification Accepted, 6th Apr., 1889
Improvements in the Mouthpieces and Lids, Doors, or Covers of Gas
Retorts and Ovens and other Vessels and Articles Requiring
Gas and Air Tight Joints.
We WILLIAM HENRY WESTWOOD and EDWARD THOMAS WRIGHT both of Hope
Works Brierley Hill in the County of Stafford Boiler and Gas Holder Manufacturers
and Engineers do hereby declare the nature of this Invention to be as follows
Our invention has for its object the construction of a gas and air tight joint between
the mouth piece and lid door or cover of a gas retort or other vessel or article as well
as the protecting of the seat or joint from deposit upon it of tar or dirt.
For these purposes we construct and arrange the parts of the mouth piece and the
lid door or cover in the manner herein after described.
We will describe our invention as applied to a gas retort mouthpiece and its lid
or cover.
Instead of making the retort lid or cover bear or seat itself upon a joint or seat at
the extreme front end or face of the retort mouthpiece as usual we make the retort lid
or cover bear or seat itself upon a flexible seat or joint external to and set back a short
distance from the front edge or face of the mouth piece thereby protecting the flexible
seat or joint from the deposit of tar or dirt upon it. We form the seat described for
the flexible joint of a ring piece having in it a dovetail or undercut groove and we
form the joint by fixing firmly in the dovetail or undercut groove of the ring piece a
fire resisting and flexible material such for example as asbestos
The ring piece
carrying the flexible joint may either be made in one piece with the mouthpiece or
separate therefrom as herein after described The open narrow end of the dovetail or
undercut groove of the ring piece into which the flexible material is placed is situated
outwards and upon the flexible joint or seat the lid or cover is pressed and held
make the extreme end of the mouth piece in front of the set back joint or seat
described either flat or throated and we provide the lid or cover with a rim for
bearing against the said joint or seat The lid or cover is held in its place by a cross
bar and screw or by other arrangement of fastening.
We

page_text: When the set back ring to hold the flexible joint or seat is made separately from
the mouth piece the said ring may be made in one or more pieces bolted together and
fixed outside the mouthpiece at the required position by a cement or other joint or
the ring piece may be bolted in its place
Or the front end of the mouthpiece may be made of a separate tubular piece in
which the dovetail or undercut groove for receiving the flexible Joint is made. The
back part of the separate tubular piece is made of a diameter proper for fitting on the
outside of the mouthpiece to which it is fixed by a cement or other joint or by bolting
or otherwise.
We apply our invention to the mouthpieces and doors or covers of gas ovens
apparatus and vessels for storing gas and chemicals the ends of pipes or conduits and
their covers and other vessels and articles where a gas and air tight joint is required
substantially in the manner herein before described with respect to the mouth piece
and lid or cover of a gas retort
Dated this 11th dow of Inno 1000

page_text: Improvements in the Mouthpieces and Lids, Doors, or Covers of Gas
Retorts, and Ovens and other Vessels and Articles Requiring
Gas and Air Tight Joints.
We WILLIAM HENRY WESTWOOD and EDWARD THOMAS WRIGHT both of Hope
Works Brierley Hill in the County of Stafford Boiler and Gas Holder Manufacturers
and Engineers do hereby declare the nature of our invention, and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement
-
Our invention has for its object the construction of a gas and air tight joint between
the mouthpiece and lid, door or cover of a gas retort or other vessel or article as
well as the protecting of the seat or joint from deposit upon it of tar or dirt
For these purposes we construct and arrange the parts of the mouth piece and the
lid, door or cover in the manner hereinafter described.
We will describe our invention as applied to a gas retort mouth piece and its lid or
cover.
Instead of making the retort lid or cover bear or seat itself upon a joint or
seat at the extreme front end or face of the retort mouth piece as usual we make
the retort lid or cover bear or seat itself upon a flexible seat or joint external to
and set back a short distance from the front edge or face of the mouth piece
thereby protecting the flexible seat or joint from the deposit of tar or dirt upon it.
We form the seat described for the flexible joint of a ring piece having in it a
dovetail or undercut groove and we form the joint by fixing firmly in the dovetail
or undercut groove of the ning piece a fire resisting and flexible material such fol
example as asbestos. The ring piece carrying the flexible joint may either be made
in one piece with the mouth piece or separate therefrom as hereinafter described
The open narrow end of the dovetail or undercut groove of the ring piece into
which the flexible material is placed is situated outwards and upon the flexible joint
or scat the lid or cover is pressed and held. We make the extreme end of the
mouthpiece in front of the set back joint or seat described either flat or throated and
we provide the lid or cover with a 1m for bearing against the said joint or seat.
The lid or cover is held in its place by a cross bar and screw or by other arrange-
ment of fastening
When the set back ring to hold the flexible Joint or seat is made separately from
the mouth piece the said ring may be made in one or more pieces bolted together and
fixed outside the mouthpiece at the required position by a cement or other joint; or
the ring piece may be bolted in its place.
Or the front end of the mouthpiece may be made of a separate tubular piece in
which the dovetail or undercut groove for receiving the flexible joint is made. The

page_text: back part of the separate tubulai pieco is made of a diameter proper for fitting on the
outside of the mouth piece to which it is fixed by a cement or other joint, or by bolting
or otherwise
Figure 1 of the accompanying Drawing represents in vertical section and Figure 2
in front elevation a gas retort mouthpiece consti ucted according to our invention in
which a set back ring piece carrying the flexible seat or joint for the lid or cover 19
made in one piece with the said mouthpiece a is the gas ietort mouthpiece; bis the
set back ring piece made in one piece therewith; c is the dovetail or undercut groove in
the said ring piece in which groove e the fire resisting and flexible material d to form
the joint or seat for the lid is placed.
Figure 3 represents in vertical section a gas retort mouthpiece and lid together
with the fixing appliances of the lid, the said mouthpiece and lid being constructed
according to our invention. Figure 4 represents a front elevation of the mouthpiece
Figure 3, Figure 5 represents a modification of the mouthpiece. In the mouthpieces
repre-ented in Figures 3, 4 and 5 the set back ring piece carrying the flexible
seat or joint d for the lid is made in a separate tubular piece f forming the front
end of the mouthpiece a the said separate tubular piece f being made in three
pieces and bolted together by flanges at g, g (see Figure 4).
It will be seen by an examination of Figures 3 and 5 that the back part of the
tubular piece constituting the front of the mouthpiece a is made of a diameter
proper for fitting on the outside of the mouthpiece, a cement or other joint at h
being used between the end of the mouthpiece and the shoulder on the tubular
piecof The dovetail or undercut groove containing the fire resisting and flexible
material d is marked c, e is the lid or cover of the mouth piece fixed in its place by
cross piece and screw of the ordinary kind. The said lid or cover e has a rim e the
faco of which bears against the flexible joint or seat d in the set back ring of the
mouthpiece. The manner in which the rim of the hd or cover seats itself on the
flexible seat is seen in Figure 3.
The same kind of lid or cover is used with the several forms of mouthpieces made
according to our invention.
Figure 6 represents in vertical section a gas retort mouthpiece in which the set
back ung piece is made separate from and fixed outside the front of the mouthpiece.
The sad separate ring piece is marked and the undercut groove therein is marked c
and the flexible joint or seat is marked d The separate set back ring piece b
Figure 6 is made in three or more parts which are Lolted together in the manner
represented with respect to the tubular piece f Figure 4 In addition to bolting the
separate ng piece b, Figure 6, to the mouthpiece it may be cemented to the outside
of the mouthpiece in any convenient way.
We do not limit ourselves to the number of parts of which the separate tubular
piece Figures 3 and 4 or the separate ring piece Figure are made nor to the
making them in several pieces as in some cases, depending upon the form of the
mouthpiece, they may be made in one piece
The projection or part of the mouthpiece in front of the flexible joint or seat d may
be made of a double dovetail or undercut in the manner generally understood by the
term throated or of such other form as will prevent tar or dirt getting onto the flexible
Joint by adhering to or running upon the underside of the mouthpiece
In Figure 1 the front projecting part of the mouthpiece is represented inclined
towai is the front; in Figure 3 the projecting part is represented inclined from the
front, in Figure 5 the projecting part is represented throated or grooved and in
Figure 6 the projecting part is represented enlarged and partly covering the flexible
Joint or seat..
We apply our invention to the mouthpieces and doors or covers of gas ovens,
apparatus and vessels for storing gas and chemicals, the ends of pipes or conduits and
their covers and other vessels and articles where a gas and air tight joint is required
substantially in the manner herein before described with respect to the mouthpiece and
lid or cover of a gas retort,

page_text: Having now particularly described and ascertained the nature of our inven-
tion and the manner in which the same is to be performed we declare that we
claim as our invention:-
Providing gas retort mouthpieces or ovens or other vessels and articles requiring
gas and air tight joints with an external set back ring piece near the front thereof
having in it a dovetail or undercut or other groove for receiving and retaining a fire
resisting and flexible material to form the joint or seat for the lid cover or door of the
mouthpiece oven vessel or article to bear against for the purpose and substantially as
bereinbefore described and illustrated in the accompanying Drawing and the combina-
tion with the said set back joint or seat of a lid, cover or door having a rim to bear
against the said joint or seat as hereinbefore described and illustrated in the
accompanying Drawing
Dated the Twants coound dar of Wahr 1889
WILLIAM HENRY WESTWOOD.
EDWARD THOMAS WRIGHT.