Improvements in Glue Pots, Porridge Pots, and such like Vessels.
Year: 1895

page_text: Date of Application, 23rd Nov., 1895
Complete Specification Left, 22nd Aug., 1896-Accepted, 26th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Glue Pots, Porridge Pots, and such like Vessels.
I JOHN LEWIS DUBOIS of 13 West Bank Stamford Hill N. Commercial Agent
do hereby declare the nature of this invention to be as follows:
The improvements relate principally to the vessels used for cooking and melting
in which the article to be acted upon is placed in an inner pan which is immersed
in water contained in an outer pan or jacket to equalize the heat and prevent
burning. One object of this invention is to prevent boiling over when upon the
fire and to retain the heat as long as possible after removal therefrom and in
pursuance of those objects I make those portions of the two pans which meet either
of the usual flat form or of any suitable but always corresponding angle or slope so
that in every case there is an annular band of surface-contact.
Within the limits of this annular band in both vessels I create suitable holes or
openings which when in line with each other give free egress to the steam and so
prevent "boiling over." When removed from the fire, in order that the heat may
be retained as long as possible the inner pan is turned slightly so that the holes or
openings do not then range true with each other and there then being no egress for
the steam loss of heat by evaporation is greatly retarded.
Another object of the invention is to improve the form of the inner pan which
I make of inverted cone section rounded at the bottom so that there are no angles
and with an annular ring or foot formed upon the base so that it will stand by itself
when taken out of the jacket. The mouth of the said inner pan instead of being
as large or larger than its greatest internal diameter as heretofore is made smaller
by reason of the top edges thereof converging inwards. By this means the contents
when boiling are thrown towards the centre and in the case of a gluepot the more
acute edge is an advantage for removing from the brush the surplus material.
The said pans may be fitted with the ordinary loop bail handle but for the purpose
of holding the bail of the outer pan in an upright position when so desired I make
the bail of the inner pan square in form so that by lying at right angle against the
bail of outer pan the latter is kept in a vertical position. In other cases I form
upon the edge of the inner pan an upright handle either fixed or hinged with a
notch or recess in its upper extremity to receive and hold up the bail of outer pan.
As another means of causing the bail when so required to remain in an upright
position form the lags or ears to which the bail is attached with an elongated
vertical slot in place of the usual round hole. On each side of the slot for a
portion only of its height I create a short rib or projection. When the bail is held
up against the top of the slot it can be turned down into a horizontal position
but if lifted up and then allowed to drop down between the two ribs it is by them
retained in a vertical position. As a modification of this arrangement the hole for
bail may be round as usual and the ribs so placed and formed that the bail
of its own elasticity pass over and spring into the space between them and so like-
wise be held in a vertical position. These arrangements are applicable to all kinds
of cooking vessels and other utensils wherewith bail handles are employed.
can
In order that the water in the outer pan may be heated rapidly I form therein
undulations or projections of any suitable form and position so as to increase the

page_text: heating surface. They may be created only upon the inside or take the form of
corrugations vertical or otherwise extending to the outer surface.
Dated this 23rd November 1895.
I JOHN LEWIS DUBOIS of 13 West Bank Stamford Hill N. Commercial Agent
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 improvements relate principally to the vessels used for cooking and melting
in which the article to be acted upon is placed in an inner pan which is immersed
in water contained in an outer pan or jacket to equalize the heat and prevent
burning. One object of the invention is to prevent boiling over when upon the fire
and to retain the heat as long as possible after removal therefrom and to effect this
I make the supporting portions of the two pans of the usual flat form or of any
suitable but always corresponding angle or slope so that in every case there is an
annular band of surface contact. Within the limits of this band in both vessels
I create suitable holes or openings which when in line with each other give free
egress to the steam and so prevent boiling over but when removed from the fire
the inner pan can be turned slightly thereby shutting off the holes or opening
and there then being no escape for the steam the heat is retained for a longer
period.
Another object of the invention is the improvement of the form of the inner pan
to prevent its contents from boiling over and render it more efficient in pursuance
of which I make the bottom egg shaped with an annular ring or foot formed upon
the base so that it will stand by itself when taken out of the jacket. The mouth
of the said inner pan instead of being as large as its greatest internal diameter as
heretofore I make smaller by causing the edge thereof to converge inwards to any
desirable extent. By this means the contents when boiling are thrown towards the
centre thus preventing boiling over and in the case of gluepots the more acute edge
greatly facilitates the removal from the brush of the surplus material.
The said pans may be fi ted with loop or bail handles of the ordinary form but
for the convenience of holding the handle of the outer pan in a vertical position
I make the bail of the inuer pan with a square or right angle end so that it can
lie against the bail of the outer pan without slipping and by reason of its weight
and shape the bail of the outer pan is retained in a vertical position.
That the invention may be more easily understood I annex drawing in which
Fig. 1 shews the improvements as applied to a porridge pot in which A is the
outer pan or jacket. B is the inner pan. CC are the holes in the supporting parts
or flanges which when in line permit the escape of the steam. D is the inward
converging mouth of the inner pan. EE are the ordinary tubular handles.
Fig. 2 shews the improvements as applied to a gluepot in which A is the outer
pan or jacket. B is the inner pan. CC are the holes in the supporting parts or
Hanges which when in line permit the escape of the steam. D is the inward con-
verging mouth of the inner pan. E is the square ended bail of the inner pan.
F is the bail of outer pan.
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 1
claim is
1st. In the construction of vessels for cooking or melting in which an inner par

page_text: and outer jacket are employed-The creation in the supporting parts or flanges of
holes or openings for the purpose described and set forth.
2nd. The formation of an inward converging edge or lip upon the mouth of the
said inner pan.
3rd. Forming the bottom portion of the said inner pan of inverted cone or egg-
end form in combination with an annular ring foot.
4th. The formation of the bail of inner-pan with square or right-angle end.
5th. The combination of the before mentioned parts for the purposes described
and set forth.
Dated this 21st day of Avqust 1806
JOHN LEWIS DUBOIS.