Improvements in or relating to Apparatus for Boiling Milk.
Year: 1890

page_text: Date of Application, 22nd Sept., 1890
Complete Specification Left, 5th June, 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Apparatus for Boiling Milk.
A communication from abroad by LEONHARD MOLL trading as the Pfälzer
Metallwaaren-Fabrik of Lambrecht, Palatinate, Empire of Germany.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster, and 323, High Holborn, in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this invention
to be as follows:-
It is well known that milk, as soon as it commences to boil, very quickly swells
up and forms froth or bubbles.
It is owing to this circumstance and to the often rapid and unexpected commence-
ment of the boiling of the milk that the latter very often boils over and sometimes
almost the whole of it runs away and is lost.
The removal of milk pots containing boiling and running over milk from a grate
or heating device has already frequently been the cause of considerable injuries.
A suitable, simple, automatic apparatus for preventing milk from boiling over is
therefore a matter of great necessity.
There are two ways of attaining this result:-
The milk pot must be removed from the flame as soon as the milk commences to
boil, or the flame must be extinguished at the proper moment so that any boiling
over of the milk is prevented.
In order to attain the first result, a person must always stand by the boiling milk
and await the proper moment for removing it from the fire. This is inconvenient
and there remains therefore only the other way, namely, by extinguishing the flame
at the proper moment.
The object of this invention is a device for extinguishing automatically the flame
of milk cooking apparatus as soon as the milk begins to boil.
The result is fully and completely attained by making the cover of the cooking
vessel in the form of a float. Under the rim of the cover rests the extreme end of
a lever with arms of unequal length. The short arm is bent round in a suitable
manner.
The lever is pivotted, and the pivot is fixed, if desired, on one of the feet of the
milk cooking vessel. On the same foot, the extinguishing lid of the spirit burner
is pivotted on a suitably curved rod.
When the cooking vessel is filled with milk, the cover is placed upon the vessel,
the lever and the flame extinguisher are placed in position and the burner is lighted.
As soon as the milk commences to boil, the lid is raised, the lever arm is released
and operates the extinguisher, by means of the short arm of the lever, in such a
manner as to extinguish the flame. The lever can be connected with a shut off tap
of a gas burner in any desired manner when gas is used as the heating agent.
Dated this 20th day of September 1890
WM. P. THOMPSON & Co.,
Agents for the Applicant..

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Apparatus for Boiling Milk.
A communication from abroad by LEONHARD MOLL, trading as the Pfälzer
Metallwaaren-Fabrik of Lambrecht, Palatinate, Empire of Germany.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.T.M.E., of the Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool, and 6 Bank Street, Manchester, both
in the County of Lancaster, and 323 High Holborn in the County of Middlesex,
Civil 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 :-
It is well known that milk as soon as it commences to boil, very quickly swells
up and forms froth or bubbles.
It is owing to this circumstance and to the often rapid and unexpected commence-
ment of the boiling of the milk that the latter very often boils over and sometimes
almost the whole of it runs away and is lost.
The removal of milk pots containing boiling and running over milk from a gråte
or heating device has already frequently been the cause of considerable injuries.
A suitable, simple, automatic apparatus for preventing milk from boiling over is
therefore a matter of great necessity.
There are two ways of attaining this result:-
The milk pot must be removed from the flame as soon as the milk commences to
boil, or the flame must be extinguished at the proper moment so that any boiling
over of the milk is prevented.
In order to attain the first result, a person must always stand by the boiling milk
and await the proper moment for removing it from the fire. This is inconvenient
and there remains therefore only the other way, namely, by extinguishing the flame
at the proper moment.
The object of this invention is a device for extinguishing automatically the flame
of milk cooking apparatus as soon as the milk begins to boil, and the invention will
be best understood by reference to the annexed drawing showing an apparatus
constructed according to this invention.
The result in view is fully and completely attained by making the cover D of
the cooking vessel A in the form of a float. Under the rim B of the cover D. rests
the extreme end C of a lever H with arms of unequal length. The short arm E is
bent round in a suitable manner.
The lever H is pivotted at F, and the pivot is fixed, if desired, on one of the
feet G of the milk cooking vessel. On the same foot G the extinguishing lid L of
the spirit burner K can be pivotted on a suitably curved rod J.
When the cooking vessel A is filled with milk, the cover D is placed upon the
vessel, the lever H and the flame extinguisher L are placed in the position shown
in the drawing, and the burner K is lighted. As soon as the milk commences to
boil, the lid D is raised, the lever arm C is released and moves in the direction of
the arrow into the position shown in the dotted line whereby the extinguishing lid.
by means of the short arm E is also brought in the direction shown by the arrow
into the position shown by dotted lines and thus the flame is immediately
extinguished.
The lever arm H can be connected with a shut off tap of a gas burner in any
desired' manner when gas is used as the heating agent.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me by
my foreign correspondent, I declare that what I claim is
:-
In milk boiling vessels the application of a two-armed lever H suitably fixed in
connection with the cooking vessel, the longer arm C of which lever being suitably

page_text: curved, is held by the lid D of the cooking vessel, whilst the shorter arm is so
arranged as to be able to close the lid L of the burner, or to shut off the tap of a
gas burner, as soon as the cover D rises on the boiling of the milk and thereby
allows the arm C to fall backwards, all substantially as herein before described and
shown.
Dated this 1th dovr of Lune 1901
WM. P. THOMPSON & Co.,
Agents for the Applicant.