Improvements in or relating to the Treatment of Fish and other Offal or similar Refuse.
Year: 1896

page_text: Date of Application, 2nd Apr., 1896
Complete Specification Left, 1st Jan., 1897-Accepted, 6th Mar., 1897
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Treatment of Fish and other
Offal or similar Refuse.
We, THE FISH UTILIZATION SYNDICATE LIMITED, Manufacturers and JOHN
CHARLES WILLIAM STANLEY, Gentleman, both of 31 Queen Victoria Street, in the
City of London, do hereby declare the nature of this invention to be as follows:-
This invention relates to the treatment of fish and other offal or similar refuse
whereby it may be utilized for commercial purpose; we will describe the invention as
applied to fish offal for the manufacture of fish guano, and for the recovery of
the oil.
The present invention is an improvement upon the process for which the said
J. C. W. Stanley obtained Letters Patent No. 17205 of 1893, the advantageous
results of that process being retained, but the process and apparatus greatly
simplified.
In carrying out the invention the offal to be treated-say the refuse from the fish
shops may be placed upon a perforated or openwork table or sieve, the blood and
liquid portions passing through the perforations and collecting in a suitable
receptacle while any extraneous matters-oyster shells for instance-are being
removed by hand sorting. The offal is then conveyed to a boiling tank with a
perforated top which keeps the fish etc. below the surface of the boiling water, while
the oil liberated by the boiling rises to the surface through the perforated plate and
flows to a settling tank from which it can be skimmed or drawn off as required,
and can then be strained boiled and passed through a filter press when it will be
suitable for commercial use in soap making for example.
The water of the boiling and settling tanks is circulated by one or more suitable
pumps or equivalent and may be used over and over again, but is preferably
changed at the end of each day's operations. It may be run into precipitating and
settling tanks and treated with a precipitating agent-alum cake for instance-if
necessary.
The fibrous, bony and other parts not escaping with the oil are caused to traverse
the boiling tank by a worm conveyor which moves them to an elevator which
delivers them to a screw press with a decreasing pitch which squeezes most of the
water out of it after which it passes to a dryer-preferably such as described in the
said J. C. W. Stanley's previous Patent No. 17205 of 1893. From the dryer it is
automatically conveyed to a revolving cylindrical sieve through which the finer parts
pass and are then bagged ready for sale. The bony parts escape at the end of the
sieve and pass to a disintegrator where they are crushed fine and are then ready for -
bagging.
Dated this 2nd day of April 1896
BOULT & WADE,
Agents for the Applicants.

page_text: Improvements in or relating to the Treatment of Fish and other
Offal or similar Refuse.
We, THE FISH UTILIZATION SYNDICATE LIMITED, Manufacturers, and JOHN:
CHARLES WILLIAM STANLEY, Gentleman, both of 31 Queen Victoria Street, in the
City of London, 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 the treatment of fish and other offal or similar refuse
whereby it may be utilized for commercial purpose; we will describe the invention
as applied to fish offal for the manufacture of fish guano and for the recovery of
the oil.
The present invention is an improvement upon the process for which the said
J. C. W. Stanley obtained Letters Patent No. 17205 of 1893, the advantageous
results of that process being retained, but the process and apparatus greatly
simplified.
In carrying out the invention the offal to be treated-say the refuse from the fish
shops is placed upon a perforated or openwork table or sieve, the blood and liquid
portions passing through the perforations and collecting in a suitable receptacle
while any extraneous matters oyster shells for instance-are being removed by
hand sorting. The offal is then conveyed to a boiling tank with a perforated top
which keeps the fish etc. below the surface of the boiling water, while the oil liberated
by the boiling rises to the surface through the perforated plate and flows to a settling
tank from which it can be skimmed or drawn off as required, and can then be strained
boiled and passed through a filter press when it will be suitable for commercial use,
in soap making for example.
The water of the boiling and settling tanks is circulated by one or more suitable
pumps or equivalent and may be used over and over again, but it is preferably
changed at the end of each day's operations. It may be run into precipitating and
settling tanks and treated with a precipitating agent-alum cake for instance-if
necessary.
The fibrous, bony and other parts not escaping with the oil are caused to traverse
the boiling tank by a worm conveyor which moves them to an elevator which delivers
them to a screw press with a decreasing pitch which squeezos most of the water out
of them after which they pass to a dryer-preferably such as described in the said
J. C. W. Stanley's previous Patent No. 17205 of 1893. From the dryer they are
automatically conveyed to a revolving cylindrical sieve through which the finer parts
pass and are then bagged ready for sale; these finer parts constitute the fibre guano.
The bony parts escape at the end of the sieve and pass to a disintegrator where they
are crushed fine and are then ready for bagging as bone guano.
In the accompanying drawing which illustrates, diagrammatically, apparatus by
which the process herein before referred to can be satisfactorily carried out. A is the
boiling tank with a furnace B underneath it, or it might be steam jacketted. A¹ is
the perforated top of the boiling tank. A is an overflow channel by which the oil
rising through the perforated plate flows to a settling tank C; D is a circulating-
. pump connected with the settling tank C by the pipe C and with the boiling tank A by
the pipe A³ to circulate their contents as may be desired; E is a worm conveyor
arranged to rotate at the bottom of the boiling tank which is so shaped as to approach
at the bottom fairly close to the worm blades, to withdraw the boiled residue there-
from into the elevator casing F containing the elevator G by which the residue is
delivered to the apparatus in which the subsequent squeezing, drying and sifting are
accomplished.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The process of producing fish guano substantially as hereinbefore described.
2. In the manufacture of fish guano a process comprising the boiling and
disintegration of fish offal below a submerged grating whereby the oil is separated
therefrom, removal of the boiled residue and the squeezing, drying, and sifting of the
same substantially as described.
3. In the manufacture of fish guano the obtainment of oil by boiling and.
disintegrating fish offal below a submerged grating substantially as described.
4. Fish guano, the product of the process hereinbefore described.
Dated this Thirtieth day of December 1896.
For THE FISH UTILIZATION SYNDICATE LIMITED,...
L. GRASSIE, Secretary.
JOHN CHARLES WILLIAM STANLEY.
Boult & Wade,
Agents for the Applicants.