IMPROVEMENTS IN DOUBLE CANS OR VESSELS TO CONTAIN
Year: 1868

page_text: LETTERS PATENT to John Holmes Bass; of No. 6, Featherstone
Street, in the City of London, Machine Cork Manufacturer, for the
Invention of "IMPROVEMENTS IN DOUBLE CANS OR VESSELS TO CONTAIN
* TD
LETTERS PATENT to John Holmes Bass, of No. 6, Featherstone
Street, in the City of London, Machine Cork Manufacturer, for the
Invention of "IMPROVEMENTS IN DOUBLE CANS OR VESSELS TO CONTAIN
LIQUIDS OR SUBSTANCES WHICH IT IS DESIRED TO PROTECT FROM THE
OF EXTERNAL TEMPERATURE."
Sealed the 28th July 1868, and dated the 27th February 1868.
PROVISIONAL SPECIFICATION left by the said John Holmes Bass
at the Office of the Commissioners of Patents, with his Petition,
on the 27th February 1868.
I, JOHN HOLMES. BASS, of No. 6, Featherstone Street, in the City
of London, Machine Cork Manufacturer, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN DOUBLE CANS OR VESSELS TO
CONTAIN LIQUIDS OR SUBSTANCES WHICH IT IS DESIRED TO PROTECT FROM THE
INFLUENCE OF EXTERNAL TEMPERATURE," to be follows:-
This Invention has for its object improvements in double cans or
vessels to contain liquids or substances which it is desired to protect
from the influence of external temperature. I make the external part
of the double can or vessel of sheet tin, or other sheet metal, and with a

page_text: suitable opening or mouth at the top, around which on the inside a
socket is formed, and at the bottom this part of the can or vessel is open.
Into it the internal part, which is of considerably smaller size, is inserted,
its neck entering the socket within the outer vessel, and between the
neck and the socket an elastic ring is introduced to produce a tight
joint without any contact being made between the metal of the outer
and that of the inner vessel. The elastic ring is compressed between
the top of the socket and a flange or part in connection with the neck,
the same elastic ring also projecting somewhat beyond the mouth of the
inner part of the can or vessel may serve to make a tight joint
with a stopper with which the vessel may be provided. In order to keep
the inner part of the can or vessel in its place within the outer part
a peg is fixed in its bottom which enters a hole in a cross bar, and the
cross bar is then fixed by screws or otherwise to lugs formed within
the outer part of the can or vessel near its bottom. The space between
the inner and the outer parts of the can or vessel is then filled with
non-conducting material, by preference with cork dust, and a bottom
being soldered or fixed into the outer part the double can or vessel is
.complete.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Holmes Bass in the Great Seal Patent
Office on the 27th August 1868.
TO ALL TO WHOM THESE. PRESENTS SHALL COME, I, JOHN
HOLMES BASS, of No. 6,- Featherstone Street, in the City of London,
Machine Cork Manufacturer, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of February, in the
year of our Lord One thousand eight hundred and sixty-eight, in the
thirty-first year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said John Holmes Bass, Her special
licence that I, the said John Holmes Bass, my executors, adminis-
trators, and assigns, or such others as I, the said John Holmes Bass,
my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully

page_text: might make, use, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man,
an Invention for "IMPROVEMENTS IN DOUBLE CANS OR VESSELS TO CONTAIN
LIQUIDS OR SUBSTANCES WHICH IT IS DESIRED TO PROTECT FROM THE INFLUENCE OF
EXTERNAL TEMPERATURE," upon the condition (amongst others) that I, the
said John Holmes Bass, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the
same to be filed in the Great Seal Patent Office within six calendar
months next and.immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Holmes Bass, do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement thereof, that is to say:-
This Invention has for its object improvements in cans or similar
vessels adapted especially to contain hot or cold water or other liquid
which it is desired to protect from the influence of external temperature.
I form two can-like vessels of sheet metal;. one of them larger than the
other by the difference of an inch to 1½ inches or more in all
direction; I enclose the smaller one within the larger, and solder or
otherwise unite them. together at their two extremities, or otherwise
making special provision to prevent as far as is practicable the conduction
of. heat from one vessel to the other; I then fill the interspace between
the vessels with fine ground cork or other non-conducting solid
material.
And in order that my said Invention may be most fully understood
and readily carried into effect, I will proceed to describe the Drawings
Figure 1 is a vertical section of a double can or vessel constructed'
according to my Invention and in the manner which I prefer. The
materials I employ by preference are tin or iron plate tinned, copper
plate, german or sterling silver. I first form the mouth piece A by
stamping or working it up into the required shape, and I line it on the
inside with thin German silver, turning the silver over and soldering

page_text: it round the outer edge. This lining should extend a little below-the-
mouth piece to which it is attached as seen at a, a, Figures 1 and 2.
I then stamp up or otherwise form the external cover B (Figure 3),
and I solder A and B together, strengthening their union by several
angle pieces on the under side, these parts so united are shown at
Figure 6. I next form the external conical body C. (Figure 4) and
the rabbits at each end c, c, to receive respectively the cap B and
the hemisphere D, which latter I form by the ordinary process of
stamping or raising. Having thus fitted on the hemisphere and the
cap, I solder up the seam d, d, of the cone C and solder the piece B
to the piece C. I then form and solder together the internal vessel F
in the same way. I make this vessel by preference of tinned copper
or German silver, but the. top e, e, either wholly of German silver or
at least the upper part of it, I then solder on the basin hemisphere f, f.
also of tinned copper or German silver which has been, formed by
stamping or raising like the hemisphere D; I also strengthen the bottom
of this basin by soldering on the flange (Figure 7) carrying the cone o
firmly united to it. Lastly, I unite the inner vessel to the outer by
passing the German silver top e, e, through the hole in the German
silver lining of the mouth piece A, and I expand the one cone within
the other so as to cause them to lock as seen in Figure 9. I then
solder on the basin D (Figure 5) which has been formed with a large
opening h, h, in its bottom, but which opening is smaller than the
foot k, k, so as to leave a margin of an inch to 1 inch in breadth
between them; I then form the cross piece m, m, (Figure 10) of strong
tin or tinned iron, making the arms quite straight that they may be
better able to support the weight they have to carry. This cross piece
has a round hole in the centre through which is passed the end of
the cone o. I then solder the cross firmly at the extremity of the
arms to the margin p, p, (Figure 11) and solder the cone to the central
hole. Or in lieu of the above I form the cross of one piece with the
foot cutting out from it the, holes for filling in the ground cork and
attaching the cone to the central hole as above described.
solder together the two German silver cones which have already been
As a different
locked to each other at the point of junction a, a.
mode of connecting the two vessels I solder on to the exterior of the
inner vessel three or more vertical ribs of tin or iron (Figures 12),
so formed as to pass across the interspace and fit and come in contact
with the inside of the outer vessel. In this case I dispense with the
I then

page_text: conc and cross at the bottom. Lastly, I fill the interspace between
the two vessels with perfectly dry cork ground to powder of about
the fineness of commercial pepper, gently jarring it down and then
closing the opening by soldering on the bottom r, r, (Figure 11).
His a handle fixed to the vessel and I is a hemisphere of glass,
earthenware, or metal serving as a valve; it is attached to a metal
hinge affixed to the piece A. It will be observed that the two parts
of the double vessel are connected at the top by means of German
silver which is an alloy having a very low conducting power, and the
German silver sheet is kept very thin, so that the loss of heat by
conduction through it is extremely small at the bottom, as will also
be observed the connection between the outer and inner vessel is
formed by means of the cone and arms or the vertical ribs in such
manner that the heat can escape from the inner to the outer vessel
only by being conducted for a considerable distance through connections
of a small sectional arca, so that here also the loss of heat will be very
gradual.
In witness whereof, I, the said John Holmes Bass, have here-
unto set my hand and seal, this Twenty-fifth day of August, in
the year of our Lord One thousand eight hundred and sixty-