IMPROVEMENTS IN APPARATUS OR APPLIANCES USED IN THE MANU- MACHURE OF SUT
Year: 1878

page_text: LETTERS PATENT to Henry Crompton Ashlin and Richard Pinder Asbridge,
of Liverpool, in the County of Lancaster, Civil Engineers, for the Invention
of "IMPROVEMENTS IN APPARATUS OR APPLIANCES USED IN THE MANU-
MACHURE OF SUT”
Sealed the 21st January 1879, in pursuance of an Order of the Lord Chancellor,
Sealed the 21st January 1879, in pursuance of an Order of the Lord Chancellor,
and dated the 8th July 1878.
PROVISIONAL SPECIFICATION left by the said Henry Crompton Ashlin
and Richard Pinder Asbridge at the Office of the Commissioners of Patents ou
the 8th July 1878.
HENRY CROMPTON ASHLIN and RICHARD PINDER ASBRIDGE, of Liverpool, in the
" IMPROVEMENTS IN APPARATUS OR
County of Lancaster, Civil Engineers.
APPLIANCES USED IN THE MANUFACTURE OF SALT."
This Invention relates mainly to the manufacture of salt from brine, and has for
its object (a), to provide durable and efficient apparatus or appliances whereby the
evaporation of brine for the production of salt may be conducted economically; and
(b), to provide apparatus or appliances whereby stoved lumps of salt may be crushed
and the pan scale rapidly and efficiently sifted out.
Under the first part of our Invention we so construct brine-evaporating pans
that a large heating surface is obtained relatively to the brine space, and the arca
of the brickwork supporting and surrounding the pans and fire-grates reduced. The
construction, and general arrangement, and setting of the pans also gives greater
durability, and allows of a fire being drawn without interfering seriously with
the action of more than one pan, permits of the parts liable to wear being easily
reached, and secures greater freedom from pan scale than has hitherto been the
case.
In carrying the above first part of our Invention into practice we construct or
form the pans of a more or less curved outline in cross section, the depth from the
surface to the bottom being such that a fire-grate may be placed between two pans

page_text: at a higher elevation than the bottom of such pans. Between each pair of pans so
constructed and arranged we place one or more pans of like construction, and lead
the heated gases and products of combustion from the fire-grates around such pan
or pans. The pans between which the fire-grate is placed are employed to make
fine grained salt, and the intermediate pans to make coarse grained salt. On
account of the construction of the pans the salt formed falls below the action of the
heated gases and products of combustion, and formation of pan scale is thus pre-
vented. As the salt accumulates at the bottom of the pans it is removed by rakes,
or in any desired manner.
Under the second part of our Invention we employ breaking or crushing apparatus
of any ordinary or desired kind to break and crush the salt, in combination with a
vibrating, rocking, rotating, or otherwise moving distributor, which distributes the
crushed and powdery salt falling from the crushing apparatus equally over the
surface of a vibrating riddle, screen, or seive, so that the salt may not accumulate in
one part of such riddle, screen, or seive.
In carrying the Invention into practice under one modification we employ
rotating rolls, actuated by any convenient power, to which the stoved lumps of salt
are supplied by a hopper or other convenient means. The stream of crushed or
powdery salt is then distributed over the surface of a vibrating riddle, screen, or
seive by means of a vibrating framework, consisting of a series of parallel bars. The
apparatus for actuating the framework and sieve may be constructed and operated
in any desired manner.
It will be shown that various forms of distributors may be constructed under our
Invention.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Henry Crompton Ashlin and Richard Pinder Asbridge in the Great Seal
Patent Office on the 21st January 1879.
HENRY CROMPTON ASHLIN and RICHARD PINDER ASBRIDGE, of Liverpool, in
the County of Lancaster, Civil Engineers. "IMPROVEMENTS IN APPARATUS OR
APPLIANCES USED IN THE MANUFACTURE OF SALT."
This Invention relates mainly to the manufacture of salt from brine, and has for
its object (a), to provide durable and efficient apparatus or appliances whereby the
evapouration of brine for the production of salt may be conducted economically; and
(b), to provide apparatus or appliances whereby stoved lumps of salt may be crushed
and the pan scale rapidly and efficiently sifted out.
Under the first part of our Invention we so construct brine evapourating pans
that a large heating surface is obtained relatively to the brine space, and the area
of the brickwork supporting and surrounding the pans and fire-grates reduced. The
construction and general arrangement and setting of the pans also gives greater
durability, and allows of a fire being drawn without interfering seriously with the
action of more than one pan, permits of the parts liable to wear being easily reached,
and secures greater freedom from pan scale than has hitherto been the case.
In carrying the above first part of our Invention into practise we construct or
form the pans of a more or less curved outline in cross section, the depth from the
surface to the bottom being such that a fire-grate may be placed between two pans
at a higher elevation than the bottom of such pans. Between each pair of pans so
constructed and arranged we place one or more pans of like construction and lead
the heated gases and products of combustion from the fire-grates around such pan
or pans. The pans between which the fire-grate is placed are employed to make
fine grained salt, and the intermediate pans to make coarse grained salt. On
account of the construction of the pans the salt formed fall below the action of the
heated gases and products of combustion, and formation of pan scale is thus pre-
vented. As the salt accumulates at the bottom of the pans it is removed by rakes
or in any desired manner.
Under the second part of our Invention we employ breaking or crushing apparatus
of any ordinary or desired kind to break and crush the salt in combination with a
vibrating, rocking, rotating, or otherwise moving distributor, which distributes-the
crushed and powdery salt falling from the crushing apparatus equally over the
surface of a vibrating riddle, screen, or sieve, so that the salt may not accumulate
in one part of such riddle, screen, or sieve.
In carrying the Invention into practice under one modification we employ
rotating rolls, actuated by any convenient power, to which the stoved lumps of salt
are supplied by a hopper or other convenient means.
The stream of crushed or
powdery salt is then distributed over the surface of a vibrating riddle, screen, or
sieve by means of a vibrating framework, consisting of a series of parallel bars. The
apparatus for actuating the framework and sieve may be constructed and operated.
in any desired manner.
It will be obvious that various forms of distributors may be constructed under
our Invention.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a sectional elevation illustrative of the first part of our Invention. 1 are
the pans, so shaped that the fire-grates 2 placed between the said pans are above
the bottoms thereof; 3 are pans placed between the pans 1, and serving for the
manufacture of coarse grained salt; the products of combustion from the fire-grate 2
are led through the spaces 4; 5, brickwork.
Fig. 2 is a sectional front view, and Fig. 3 a sectional side view of a further modi-
fication of appliances under the first part of our Invention. Like letters denote tho

page_text: same parts as in Fig. 1. In this modification the pans 3 are placed at the back of
instead of between the pans 1.
Fig. 4 is a view illustrative of the second part of our Invention. 5, rotating rolls,
which crush the salt fed to them from the hopper 6; 7, distributor, consisting of a
series of parallel bars 8, connected together by the pieces 9; the said distributor is
suspended by the links 10, and receives a vibrating motion by means of the
eccentric 11 so as to distribute the crushed salt evenly over the surface of the riddle,
screen, or sieve 12, which is suspended by the links 13, and receives a vibrating
motion from the cams 14.
Fig. 5 illustrates a further modification of apparatus. Like letters denote the
same parts as in Fig. 4. Here a series of crushing rollers, riddles, screens, or sieves,
and distributors are used so that the pieces of salt which will not pass through the
meshes of one riddle, screen, or sieve, are carried to another pair of rollers and are
again crushed, distributed, and sifted.
The carrying framework of the apparatus may be constructed in any convenient
manner, and motion may be given to the various parts in any desired way.
Having now described and illustrated our Invention so that others will be
enabled to carry our improvements into effect, we claim,-
First. Constructing and arranging brine evapourating pans substantially as set
forth.
Second. Salt crushing and sifting apparatus or appliances in combination with
distributing apparatus, constructed, arranged, and operating substantially in the
manner and for the purposes set forth.
In witness whereof, I, the said Henry Crompton Ashlin, have hereunto set
my hand and seal, the Fourth day of January, in the year of our Lord One
thousand eight hundred and seventy-nine.