Improvements in or relating
Year: 1899

page_text: Improvements in or relating
I, THOMAS VEEVERS, of Newtown, Colne, in the County of Lancaster, Manu-
facturing Confectioner, do hereby declare the nature of this invention to be as
follows:-
This invention relates to certain improvements in vacuum boiling pans for
boiling, in vacuo, cane sugar and glucose in certain proportions, for the manufac-
ture of candy, and other relative sugar goods.
The invention consists in providing means, whereby I am enabled to use the
vacum boiling pan as an open boiling pan for a certain period, and then subject
the contents of the pan to the vacuum process for a short period, whereby I
obtain as good, or better results, than by the vacuum process simply, and in
considerably less time.
For the purposes of my invention, 1 provide the vacuum pan with a pipe at the
top furnished with a valve, and open to the atmosphere. For about eight minutes
or so the valve is open to permit of the escape of steam from the contents of the
pan, and the admittance of the external atmosphere, the pan during this stage
partaking of the nature of an ordinary open boiling pan.
The valve is now closed, and for about three minutes, the contents of the pan
are subjected to the vacuum boiling process.
By this means, the process of the formation of vitreous sugar is facilitated in
less time than the ordinary vacuum process, and even better results attained in
its manufacture.
Dated this 94th day of October 1899.
RICHMOND & Co.,
Chartered Patent Agents, 12, Standish Street, Burnley.
Improvements in or relating to Vacuum Boiling Pans.
I, THOMAS VEEVERS, of Newtown, Colne, in the County of Lancaster, Manu-
facturing Confectioner, 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 relates to certain improvements in vacuum boiling pans for
boiling, in vacuo, sugar and glucose in certain proportions, for the manufacture of
candy and other relative sugar goods.

page_text: The invention consists in providing means, whereby. I am enabled to use the
vacuum boiling pan as an open boiling pan for a certain period, and then subject
the contents of the pan to the vacuum process for a short period, whereby I
obtain as good, or better results, than by the vacuum process simply, and in
considerably less time.
For the purposes of my invention, I provide the vacuum pan with a pipe at the top,
furnished with a valve, and open to the atmosphere. For about eight minutes
or so the valve is open to permit of the escape of steam from the contents of the
pan, and the admittance of the external atmosphere, the pan during this stage
partaking of the nature of an ordinary open boiling pan.
The valve is then closed, or allowed to close, and for about three minutes the
contents of the pan are subjected to the vacuum.
By this means, the process of the formation of vitreous sugar is facilitated in
less time than the ordinary vacuum process, and even better results attained in
its manufacture.
By boiling at atmospheric pressure instead of under vacuum, a smaller pro-
portion of glucose than usual may be safely employed without risk of crystalliza-
tion, whilst the application of a vacuum when the cooking operation has ceased
effects the withdrawal of excess of moisture.
The manner of carrying out the invention is illustrated by the accompanying
drawing, which shews a vacuum pan having my improvement applied thereto
for the purpose of enabling me to manufacture candy by boiling sugar and glucose
at atmospheric pressure, and thereafter removing the excess of moisture in vacuo.
A is an ordinary vacuum boiling pan heated by an outer steam jacket and by
an internal steam coil as usual and 15 is the pipe for conveying the mixture there-
into from the melting pan. C is the main steam pipe for supplying heat to the
jacket and coil, branch pipes D and E respectively being led from the main pipe C
thereto. I is the exhaust leading from the jacket of the pan A and H is the
sluice valve. G is the pipe leading from the upper part of the boiling pan A
to the air pump and this pipe is provided, in the example shewn, with a valve G',
which, during the boiling operation, is closed to shut off communication between
the boiling pan A and the air pump for a period of about eight minutes, another
pipe branching from the pipe G on the boiling pan side of the valve G being
provided with a valve J¹ which is opened during the aforesaid period to permit of
the escape of steam from the contents of the pan A to the atmosphere. The
steam supply to the heating coils is then shut off and the valve is closed
for about three minutes whilst the valve G¹ is opened to establish communication
between the boiling pan A and the air pump, so that during the latter period
the ebullition takes place in vacuo without further application of heat and the
excess of moisture is drawn off by the air pump.
In lieu of the valves G, J, a single three way cock may be employed, which in
such case would be situated at the junction of the branches G and J, so that when
turned in one direction, this cock would make communication between the pan A
and the atmosphere, and when turned in the opposite direction would connect the
pan with the air pump; or a self-closing valve may be employed, so balanced that
it allows of the escape of steam during the boiling process, but on the air pump
being brought into operation the valve would drop on its seat, thus closing off
the atmospheric air, whilst the air pump draws off the moisture from the contents
of the pan.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. The use in combination with an ordinary vacuum boiling pan of means,
such as hereinbefore described, whereby the pan can be used for producing candy
from sugar and glucose by boiling the mixture at atmospheric pressure and drawing
off the remaining moisture under a vacuum.

page_text: 2. The combination with a vacuum boiling pan of a valve or valves so arranged
to open the pan to the atmosphere or to an air pump that it may be used as an
open boiling pan or as a vacuum pan.
Doted this 2nd dov of Tune 1900
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agent for the Applicant.