IMPROVEMENTS IN THE CONSTRUCTION OF STEAM JACKETED PRO
Year: 1882

page_text: LETTERS PATENT to George Inskipp and John Mackenzie both of 62 Leadenhall
Street in the City of London Brewers' Architects and Engineers for an
invention of "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM JACKETED
PROVISIONAL SPECIFICATION left by the said George Inskipp and John
Mackenzie at the Office of the Commissioners of Patents on the 7th March
1882.
GEORGE INSKIPP and JOHN MACKENZIE both of 62 Leadenhall Street in
the City of London Brewers' Architects and Engineers “IMPROVEMENTS IN THE
CONSTRUCTION OF STEAM JACKETED BREWERY COPPERS AND OTHER JACKETED
COPPERS OR BOILING PANS "
Our Invention has for its object the construction of steam jacketed Brewery
Coppers and other Jacketed Coppers or Boiling Pans with the copper bottom of
such form as to render it more capable of resisting the pressure of the steam in the
jacket, and also to avoid the necessity of making more than one steam tight joint
between the copper or pan and the jacket.
In the ordinary construction of such coppers or pans, the copper bottom is
formed with the convex side downwards, so that the pressure of the steam in the
jacket causes a compressive strain to be put on the copper bottom and there is
also formed in the bottom a discharge opening passing through both copper
bottom and jacket, thereby involving the necessity of a steam tight joint round
the discharge opening in addition to that round the circumference of the copper
or pan.
Now our invention consists in forming the copper bottom with the convex side
upwards and the concave side towards the jacket, whereby the pressure of the
steam in the jacket will cause a tensile strain to be put on the copper bottom, which

page_text: it is better fitted to resist; being without that tendency to change its shape which
is due to the compressive strain brought on the said bottom when it is constructed
of the ordinary form.
And the discharge opening is made at one side of the copper beyond the steam
jacket instead of passing through the latter as usual, thereby obviating the necessity
for a steam tight joint round the said discharge opening or outlet, the only steam
tight joint required between the copper or pan and the jacket being that round the
circumference of the jacket.
The jacket may be made either of cast iron in one piece or of wrought iron in
pieces riveted together or it may be made of steel or other suitable metal. The 1
boiling pan may also be made of other metal than copper.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Inskipp & John Mackenzie in the Great Seal Patent
Office on the 28th August 1882.
GEORGE INSKIPP and JOHN MACKENZIE both of 62 Leadenhall Street in
the City of London Brewers' Architects and Engineers "IMPROVEMENTS IN THE
CONSTRUCTION OF STEAM JACKETED BREWERY COPPERS AND OTHER JACKETED
COPPERS OR BOILING PANS
"
Our Invention has for its object the construction of steam jacketed brewery
coppers and other jacketed coppers boiling or heating pans or vessels with the
bottom of such form as to render it more capable of resisting the pressure of the
steam between it and the jacket, and also to avoid the necessity of making more
than one steam tight joint between the copper or pan and the jacket.
In the ordinary construction of such coppers or pans or vessels, the copper is
formed with the convex side downwards, so that the pressure of the steam between
it and the jacket causes a compressive strain to be put on the bottom, and there is
also formed in the bottom a discharge opening passing through both the bottom and
jacket thereby involving the necessity of a steam tight joint round the discharge
opening in addition to that round the circumference of the copper or pan.
Now our Invention consists in forming the bottom of the copper, pan, or other
vessel with the convex side upwards and the concave side towards the jacket,
whereby the pressure of the steam will cause a tensile strain to be put on the
bottom.
And the discharge opening is made at one side of the copper pan or other vessel
beyond the steam jacket, instead of passing through the latter as usual.
The jacket may be made either of cast iron wrought iron steel or other suitable
metal.
The pan or vessel may also be made of other metal than copper.
In order however that our Invention may be fully understood and readily carried
into effect we will describe it more particularly by the aid of the accompanying
drawing.
DESCRIPTION OF THE DRAWING.
The figure is a vertical section of the improved copper or boiling pan A is the
copper bottom with its convex side upwards and its concave side downwards or
towards the jacket B. C is a steam space between the copper bottom A and the
jacket B.-D, is the discharge opening at one side of the copper or pan beyond the
jacket E is the steam joint between the copper or pan and the jacket. F is the
pipe for admitting steam to the steam space; G is the outlet for water resulting
from the condensation of steam from the steam space C.
By constructing the copper or pan with the bottom formed in the manner
represented in the drawing, it will be readily understood that the copper bottom A
will be more capable of resisting the pressure of the steam in the jacket B, and it
will also be seen that the joint E will be the only steam joint required between the
copper or pan and the jacket.
We prefer to make the copper or pan of circular form in plan, but it may be
made of other forms if required, and when made of any irregular form or shape,
the bottom may be formed in several parts or divisions, circular or otherwise, each
having a separate steam jacket, and we fix each of such parts or divisions of the
bottom to its jacket by means of a joint round its circumference or edges and with

page_text: its convex side upwards as in the case of a circular copper or pan. And when the
copper or pan, although of circular form in plan, is of very large size, we sometimes
prefer in the same manner to make the bottom in parts.
Having thus described the nature of the said Invention and in what manner
the same is to be performed, we hereby declare that what we claim as of our
Invention is.
The construction of steam jacketed coppers or pans or vessels with the concave
side of the bottoms of the same next the steam space and with only one steam
joint between the said bottom and the jacket substantially as hereinbefore
described.
In witness whereof we the said George
hereunto set our hands and seals the
year of our Lord One thousand eight
Inskipp and John Mackenzie have
twenty third day of August in the
hundred and eighty two.
GEO. INSKIPP.
(L.S.)
Witness
W. H. SPENCE
8 Quality Court
Chancery Lane.
JOHN MACKENZIE. (L.&.)