IMPROVEMENTS IN THE MODE OF AND APPARATUS FOR EXTRACTING MOISTURE FROM WHITING AND OTHER SUBSTANCES."
Year: 1880

page_text: LETTERS PATENT to Thomas Marshall, of Houghton Regis, in the County of
Bedford, for an Invention of "IMPROVEMENTS IN THE MODE OF AND APPARATUS
FOR EXTRACTING MOISTURE FROM WHITING AND OTHER SUBSTANCES."
PROVISIONAL SPECIFICATION left by the said Thomas Marshall at the
Office of the Commissioners of Patents on the 26th January 1880.
THOMAS MARSHALL, of Houghton Regis, in the County of Bedford. "IMPROVE-
MENTS IN THE MODE OF AND APPARATUS FOR EXTRACTING MOISTURE FROM
WHITING AND OTHER SUBSTANCES."
•
My Invention is intended particularly to apply to the drying of whiting, chalk,
and such analogous substances or materials from which it is required to extract
moisture in a gentle manner, and to collect and draw off the moisture arising from
such drying.
Suitable apparatus for carrying my Invention into effect is as follows:---I provide
the
a chamber, which may be of any suitable material capable of withstanding heat;
bottom of such chamber I coat with any suitable non conductor of heat, such as hair
or sawdust. Within the said chamber, preferably near the bottom and above the
non-conducting material, I preferably place a series of circulating pipes, and so
arranged that they are in communication with each other so as to admit of steam,
hot water, or hot air passing through them, but the steam, hot air, or water may
be passed into cases without the pipes.
The pipes or cases may be placed in the chamber in such a manner as to admit
of their being taken out when desired, either altogether or separately..
I prefer to bed the pipes in whiting, plaster of Paris, or other suitable material.
Above the pipes, when such are used, I place absorbents, such as chalk suckers or
other suitable absorbent or absorbents of moisture, capable of collecting and retaining
the damp or moisture from the material from which the damp and the moisture is
required to be extracted, and the moisture is evaporated again by heat.
The whiting from which moisture is to be extracted is placed on the suckers or
absorbents aforesaid. These suckers may be replaced or renewed as often as found
necessary.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Marshall in the Great Seal Patent Office on the 24th July
1880.
"IMPROVE-
THOMAS MARSHALL, of Houghton Regis, in the County of Bedford.
MENTS IN THE MODE OF AND APPARATUS FOR EXTRACTING MOISTURE FROM
WHITING AND OTHER SUBSTANCES."
My Invention is intended particularly to apply to the drying of whiting, chalk,

page_text: and such analogous substances or materials from which it is required to extract
moisture in a gentle manner, and to collect and draw off the moisture arising from
such drying. Suitable apparatus for carrying my Invention into effect is substan-
tially as follows:-I provide a chamber, which may be of any suitable material
capable of withstanding heat; the bottom of such chamber I coat with any suitable
non-conductor of heat, such as hair or sawdust. Within the said chamber, preferably
near the bottom and above the non-conducting material, I preferably place a series
of circulating pipes, and so arranged that they are in communication with each
other so as to admit of steam, hot water, or hot air passing through them, but the
steam, hot air, or water may be passed into cases without the pipes.
The accompanying Drawings illustrate the manner more fully of the way in
which I prefer to carry my Invention into effect. Figure 1 is a horizontal plan
.section through line a, b, of Figure 2, which is a vertical cross section through line
c, d, of Figure 1, of apparatus constructed according to my Invention, and illustrating
a convenient mode of carrying the same into effect. Similar letters of reference
refer to like parts in the two Figures.
A is the chamber or vessel for containing the apparatus; B is the bed of non
conducting material, such as hair, sawdust, silicate, cotton, or any other non-
conductor or combination of materials suitable for the purpose may be used; C, C,
are the pipes for the circulation of steam, water, or air; g is the inlet tap to the
pipes, and h is the outlet tap from the pipes; D is the absorbent material of chalk
or other absorbent material or suckers placed above the circulating pipes C, C. The
whiting or other substance from which the moisture is required to be extracted is
placed on the "suckers" D, which latter (the suckers) are renewed as found neces-
sary. In this way the damp or moisture from the substance to be dried is withdrawn
or extracted, and the moisture is again evaporated by heat.
Instead of passing steam, hot water, or hot air through the circulating pipes C, C,
the said steam, hot water, or hot air may be caused to pass directly in the chamber A
itself, in which case the pipes may or may not be dispensed with. The circulating
pipes are so arranged in the chamber A that they may be withdrawn therefrom
when required. The pipes are preferably bedded in whiting, plaster of Paris, or
other suitable material.
Having now described the nature of my said Invention, and in what manner the
same is to be performed, I declare that I claim,—
First. The mode of extracting and collecting moisture from whiting and other
substances by subjecting the same to the action of absorbent materials or suckers
heated by steam or other artificial means, whereby the moisture is withdrawn from
the whiting or other substances and subsequently evaporated by heat, substantially
as set forth.
Second. The construction and employment of apparatus for extracting moisture
from whiting and other substances, substantially as herein before described and
illustrated with reference to the accompanying Drawings, together with any mere
modifications thereof.
In witness whereof, I, the said Thomas Marshall, have hereunto set my hand
and seal, this Twenty second day of July, in the year of our Lord One
thousand night bundand
THOMAS MARSHALL. (L.S.)