Improvements in Retort Mouth Pieces and' Self-sealing Lids for same.
Year: 1894

page_text: Date of Application; 11th Oct!, 1894
Complete Specification Left, 5th July, 1895-Accepted, 10th Aug.,
1895
PROVISIONAL SPECIFICATION.
Improvements in Retort Mouth Pieces and' Self-sealing Lids
for same.
.
1.1
We, JOHN LOWE MITTON of Longwood, Huddersfield, Yorkshire Gas
Engineer; and TномAS JOHN LOWE MITTON of Longwood' aforesaid; Chemist,
do hereby declare the nature of this invention to be as follows:-
This invention refers to mouthpieces for gas or other retorts and to self-sealing
lids or doors for same, the object of our improvements being to prevent the tar or
other heated liquid or substance in the retort from getting to the joint between the
lid and mouthpiece, and to effectually seal such joint so that no gases can possibly
escape.
'
In carrying out our invention, we incline the mouthpiece of the retort inwardly
in such manner that any of the liquid or heated substance passing from the retort
into the mouthpiece shall be run off again and thus prevented from passing to the
joints between the lid and mouthpiece.
For the purpose of making a self-sealing lid or door for the mouthpiece, we use
a packing of asbestos or equivalent incombustible material or substance which is
inserted tightly into a groove or recess formed in the face of the lid from which it
projects a short distance.
Preferably, the incombustible packing or asbestine is first wrapped around a
metal ring made to correspond to the groove in the lid so that greater solidity is
afforded to the packing. When the door or lid is closed against the mouthpiece
and secured thereto, the asbestos packing binds tightly and evenly against the face
of the mouthpiece and gives and takes to the contraction and expansion of the
metal lid and mouthpiece, so that under all conditions the packing maintains a
tight joint and effectually prevents any escape of gases from the retort.
The
asbestine packing being indestructible by fire, it will serve for a long period
without renewal.
A groove or recess corresponding to that in the lid may be formed in the face of
the mouthpiece to receive the projecting portion of the packing when the lid is
closed.
Dated this 9th day of October 1901
"
COMPLETE SPECIFICATION.
Improvements in Retort Mouth Pieces and Self-sealing Lids
for same.
We, JOHN LOWE MITTON, of Longwood, Huddersfield; Yorkshire, Gas
Engineer, and THOMAS JOHN LOWE MITTON, of Longwood, aforesaid, Chemist,
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:-
This invention refers to mouthpieces for gas and other retorts and to self-sealing
امن

page_text: lids for same, the object of our improvements being to prevent the tar or other
heated liquid or substance passing out of the retort into the mouthpiece from
getting to the joint between said mouthpiece and the lid and to effectually seal
such joint so that no gases can escape from the retort.
In carrying out our invention we incline the mouthpiece inwardly in such manner
that any liquid or heated substance passing from the retort into the mouthpiece
shall be run off again and thus largely prevented from reaching the lid or sealed
joint.
For the purpose of making the lid self-sealing, we use a packing of asbestos or
equivalent incombustible material or substance which is inserted tightly into a
groove or recess formed in the face or inner surface of the lid. When the lid is
closed against the mouthpiece and secured thereto the asbestos packing binds
tightly and evenly against the opposing face of the mouthpiece and makes a tight
joiut.
In order that our' said invention may be fully described and ascertained, reference
is hereinafter had to the annexed sheet of drawings forming a part of this
Specification, in which
Fig. 1 is elevation in perspective of a retort mouthpiece, and self-sealing lid for
same made according to our invention, the lid being shewn open.
Fig. 2 is transverse section of retort, mouthpiece and lid, the latter being closed.
Figs. 3 and 4 are enlarged sectional details of a portion of the mouthpiece and
lid shewing slight modifications hereafter referred to.
.
Referring first to Figs. 1 and 2, letter A represents the retort mouthpiece secured
in the ordinary manner to the retort B supported in the brick setting C. The
body of said mouthpiece, or the lower portion thereof is constructed or arranged at
an angle to the retort so that it inclines downwardly thereto, as shewn clearly in
Fig. 2. This inclination of the mouthpiece tends to prevent the tar or heated liquid
or substance which boils up or passes out of the retort into the mouthpiece from
reaching the joint between it and the lid D, or lodging in said mouthpiece, such tar
or liquid on entering the mouthpiece being run back again into the retort whereby
very little, if any, is allowed to get as far as the lid.
To make the lid D self sealing, we employ a packing ring or cord. E of asbestos er
equivalent incombustible material or substance which is inserted tightly into a
groove or recess F formed all round the inner face of the lid. The said asbestos
may, if desired, be wrapped around a metal ring or wire adapted to fit into the
groove F and to be secured therein by screws or like meaus, but for ordinary
purposes, we prefer to dispense' with such ring or wire.
זי
The front end of the mouthpiece A is cast or provided with a V shaped or
tapered face or seating A', the centre or tapered edge of which coincides with the
centre of the asbestos ring E which, when the lid is closed against the mouthpiece
and secured thereto, is slightly indented by the V seating and a perfectly tight
joiut thereby made between the lid and mouthpiece."
INZ
.:
The asbestos sealing bed E gives' and takes. to the expansion and contraction of
the metal lid and mouthpiece and thus under all conditions maintains a tight joint
As the asbestine is
and effectually prevents the escape of gases from the retort.
incombustible and remains unaffected by heat, it will serve for a long period
without renewal.
t
1.
- 1 ".
For existing mouthpieces, or those made with a straight or flat face, we employ
aV shaped or knife edged ring A', of the same size and shape as the mouthpiece,
to which we secure it by bolts or screws as illustrated in Fig. 3.' If, however, the
Vseating is not required, additional packing E is inserted into the-groove F so
that it projects beyond and may be flattened against the face of the lid, as illustrated
in Fig. 4, but we prefer to employ the V-seating as there is less surface on which
tar can lodge and therefore less liability of an imperfect joint being made by an
accumulation of tar on 'the seating.
In all cases where two or more retorts are set one above the other, we form or
attach on the top of the lids, or mouthpiece A, of the second and lower retorts, a

page_text: shield or protecting plate G, which, when the lid is closed, projects over the joint
made between it and the mouthpiece and protects it from the tar which may fall
from the mouthpiece immediately above it. A plate or shield H is also formed on
or attached to the inner face of the lid A just above the joint made between it and
the bottom of the mouthpiece for the purpose of preventing the tar which boils up
into the mouthpiece and against the lid from getting to this part of the joint.
Our improvements may be applied to any make of lid and mouthpiece and any
ordinary means may be employed for forcing the lid against the V seating and
securing it to the mouthpiece."
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
Firstly. The application to retort lids of a packing ring or sealing bed of
asbestos, or equivalent incombustible material substantially as herein shewn and
described and for purposes set forth..
Secondly. The combination, with a retort lid D having an asbestine or incom-
bustible packing ring or sealing strip E, of a V shaped, tapered or knife edge
seating A' formed on or attached to the mouthpiece and adapted to engage said
packing ring and make a tight joint between the mouthpiece and lid substantially
as herein shewn and described.
Thirdly. The application or combination with a self-sealing lid D, of shields or
plates G, H projecting over the outer upper side and inner lower side respectively
of the joint made between the lid and mouthpiece for preventing tar or other
heated liquid or substance falling onto or reaching same, substantially as herein
shewn and described.
Fourthly. The combination, with gas or other like retorts, of a mouthpiece such
as A constructed at an angle to the retort so as to incline thereto for purposes set
forth, and a self-sealing lid D provided with joint protection plates or shields G, H,.
substantially as herein shewn and described.
Dated this 4th day of July 1895.
TASKER & CROSSLEY,
Huddersfield, Patent Agents.