A NEW METHOD AND MEANS FOR CONDENSING THE VAPOURS OF COAL TAR NAPHTHA
Year: 1872

page_text: LETTERS PATENT to Charles Moseley, of Ardwick, in the City of
. Manchester, India-rubber Manufacturer, for the Invention of
" A NEW METHOD AND MEANS FOR CONDENSING THE VAPOURS OF COAL TAR
NAPHTHA."
Sealed the 23rd August 1872, and dated the 30th May 1872.
PROVISIONAL SPECIFICATION left by the said Charles Moseley at
the Office of the Commissioners of Patents, with his Petition, on
the 30th May 1872.
I, CHARLES MOSELEY, of Ardwick, in the City of Manchester, India-
rubber Manufacturer, do hereby declare the nature of the said Invention
for "A NEW METHOD AND MEANS FOR CONDENSING THE VAPOURS OF COAL TAR
NAPHTHA," to be as follows:-
This Invention has for its object the condensation of the vapours of
coal tar naphtha generated in the manufacture of india-rubber, and is
applied to what are known as spreading machines.

page_text: A convenient mode of performing my Invention is by fixing upon the
drying chest of the machine a cover having sufficient depth to allow the
cloth or other material which is coated with india-rubber solution by the
machine to pass under, and sufficient spaces to allow the vapour to rise,
and in the framework or top of which cover I insert or place a tube or
tubes of sufficient capacity to carry off the vapour generated. This tube
is conducted to a fan which draws away the vapour and delivers it into
a condenser, which may be a surface condenser or an ordinary worm,
and may be kept cool by cold water, or ice, or cold atmosphere. Or
instead of drawing off the vapours by a fan, as described, they may be
carried off by forcing air through the cover, or otherwise.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said Charles Moseley in the Great Seal Patent Office
on the 29th November 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
MOSELEY, of Ardwick, in the City of Manchester, India-rubber Manu-
facturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of May, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, 'did, for Herself, Her heirs and successors, give
and grant unto me, the said Charles Moseley, Her special licence.
that I, the said Charles Moseley, my executors, administrators, and
assigns, or such others as I, the said Charles Moseley, 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 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 "A NEW METHOD AND MEANS
FOR CONDENSING THE VAPOURS OF COAL TAR NAphтía,” upon the condition
(amongst others) that I, the said Charles Moseley, 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

page_text: 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 Charles Moseley, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement (that is to say) :-
:-
.
This Invention has for its object the condensation of the vapours of
coal tar naphtha generated in the manufacture of india-rubber, and is
applied to what are known as spreading machines.
A convenient mode of performing my Invention is by fixing upon the
drying chest of the machine a cover or receiver of a sufficient capacity
for the passage of the cloth or other material which is coated with india-
rubber by the machine, and for the evaporation of naphtha which is
used as a solvent for the india-rubber.
The receiver may be made of various forms, but I prefer to use a flat
cover having folding doors for the convenience of the workmen. The
doors are made air-tight by means of strips of india-rubber or other
suitable material, and at each end of the cover is an adjustable roller or
plate to make the receiver as near air-tight as possible. Into the top or
side of the receiver is inserted a tube or tubes of sufficient capacity to
exhaust the vaporized solvent. The tube is connected to an exhausting
apparatus, consisting of a fan or air pump, but I prefer an air pump, to
draw away the naphtha vapour as it is generated and deliver it into a
condenser.
The condenser may be made in various forms, but I prefer to use à
series of metal tubes fixed in a cistern or tank which I fill with salt
water of a sufficiently low temperature to condense the vapour. In order
to obtain the desired low temperature I use a refrigerator of a suitable
construction, by means of which the salt water in the cistern of the
condenser is kept at a temperature of about twenty degrees Fahrenheit,
or more or less as may be required. I can also obtain a good condensation
by using cold or refrigerated air in the condenser in place of cold water;
or spirit or mineral oils may also be used as a condensing medium.

page_text: The accompanying Drawing represents in outline an ordinary spreading.
machine, to which my improvements are applied..
a is the steam drying chest of the spreading machine, over which the
fabric passes when coated with a solution of india-rubber and naphtha;
and 6 is the receiver or chamber, which is supported by the steam chest,
and which is provided with a cover c made in two or more parts hinged
together, and capable of being raised or removed so that the attendant
may examine the work; the ends of the receiver 6 are closed by rollers d,
the position of which is regulated by set screws, or otherwise, so that the
ends of the receiver may be closed as effectually as possible. The naphtha
evaporated as the fabric passes over the steam chest a is conveyed from
the receiver 6 by means of the tube e, one end of which opens into the
receiver, and the other is in communication with an exhausting apparatus,
consisting by preference of an air pump. This exhausting apparatus
draws the air and vapours of naphtha from the receiver b, and forces them
into the condenser f, from which they flow into the vessel 9.
The con-
densed naphtha accumulates in the bottom of the vessel, and is drawn off
through the pipe h, while the air escapes through a pipe in communi-
cation with the branch i. The condenser consists of three or other
convenient number of series of flat tubes placed in a cistern, the tubes
being surrounded by cold water, air, or other fluid.
In order to obtain the desired low temperature in the cooling medium
to produce rapid condensation I use by preference salt water that has
been cooled by a suitable refrigerator to about twenty degrees Fahrenheit.
By means of the apparatus above described, or other equivalents, I
am enabled to condense and recover a part of the naphtha that is used as
a solvent for the india-rubber in coating fabrics, whereby not only a
great saving is effected in the naphtha used, but the atmosphere of the
room in which the spreading machines are at work is kept comparatively
free from naphtha vapour, and consequently less unhealthy for the
attendants.
Having thus stated the nature of my Invention, and described a
convenient mode of carrying the same into practical operation, I wish to
remark that I am aware that unsuccessful attempts have been made to
condense the naphtha evaporated at the spreading machine; I therefore

page_text: limit my claim to the means for condensing the vapours of coal tar
naphtha as shewn and described..
In witness whereof, I, the said Charles Moseley, have hereto set
my hand and seal, this Twenty-seventh day of November, One
thousand eight hundred and seventy-two.