Improvements in Flour Milling Machinery.
Year: 1897

page_text: Improvements in Flour Milling Machinery.
We, SIDNEY LEETHAM, of Hungate, York, Miller and HENRY SIMON of 20 Mount
Street, Manchester, in the County of Lancaster, Civil Engineer, do hereby declare
the nature of this invention to be as follows:-
:-
In flour milling operations, the presence of moisture in the material operated
on is of serious disadvantage, as it tends the clog the pervious and other surfaces
employed.
Our invention relates to means of providing against this, which we effect by
providing, within the casings of the grinding rollers and of the centrifugal and
other sifting machines, coils of pipes or other extended surfaces heated by circula-
tion of hot water, steam, or hot products of combustion, so as to maintain such a
temperature as tends to take up moisture from the product dealt with. For some
machines of which the casings are or may be of metal, jackets may be formed in
the casings themselves for the circulation of the heating medium. Also, instead
of the circulation of hot fluid, electrically heated surfaces may be employed.
The air heated as above described, as it becomes more or less saturated with
moisture, is kept constantly renewed, by drawing off the moist air and introducing
fresh air, which may be done by fans or otherwise.
As an additional precaution against condensation of the moisture the exterior
surfaces of the casings may be covered with material which imperfectly conducts
heat.
LOOK
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Flour Milling Machinery.
We SIDNEY LEETHAM of Hungate, York, Miller and HENRY SIMON of 20 Mount
Street, Manchester, in the County of Lancaster, Civil Engineer, 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:-
In flour milling operations, the presence of moisture in the material operated
on is of serious disadvantage, as it tends to clog the pervious and other surfaces
employed.
Our invention relates to means of providing against this, which we effect by
arranging within the casings of the grinding rollers, the centrifugal and sifting

page_text: machines, and other appliances for milling operations, coils of pipes or other
extended surfaces heated by circulation of hot water, steam, or hot products of
combustion so as to maintain such a temperature as tends to take up moisture
from the product dealt with. For some machines of which the casings are or
may be of metal, jackets may be formed in the casings themselves for the circula-
tion of the heating medium. Also, instead of the circulation of hot fluid, electri-
cally heated surfaces may be employed. The air heated as above described, as
it becomes more or less saturated with moisture is kept constantly renewed, by
drawing off the moist air and introducing fresh air, which may be done by fans or
otherwise.
As an additional precaution against condensation of the moisture the exterior
surfaces of the casings may be covered with material which imperfectly conducts
heat.
.
Having now. particularly. described and ascertained the nature of our
invention and in what manner the same is to be performed we hereby declare that
we are aware of the Specification No. 21,859 of 1896 and that we make no claim
to the invention set forth therein, but what we claim is:-:
In combination with the machines and appliances employed in flour milling,
air heating apparatus arranged within the casings of such machines or appliances,
with passages and fans or their equivalents for the circulation of heated air
through the casings substantially as and for the purposes set forth.
Dated this 13th day of September 1897

page_text: PROVISIONAL SPECIFICATION.
An Improvement in Shallow Draft Vessels having Raised Propellers.
I, ALFRED FERNANDEZ YARROW of Isle of Dogs, Poplar, Engineer, do hereby
declare the nature of this invention to be as follows:-
-
My invention relates to shallow draft vessels of the kind in which the pro-
peller works in a cavity hollowed in the lower part of the vessel, the propeller
being of such diameter that its blades do not extend below the keel but extend
above the level of the external water. In order that air may not be admitted to
the cavity in which the propeller works, the upper side of the cavity slopes both
ways downwards from the site of the propeller.
In order to reduce as much as possible the resistance to the water issuing from
the cavity at the stern, the rearward slope is made to terminate at the water line
or sufficiently below it to prevent access of air to the propeller.
My invention relates to means of accommodating this termination of the slope
to varying draughts of the vessel. I effect this by making part of the rearward
slope of the upper side of the cavity hinged or flexible so that it can be more or
less raised when the vessel is heavily loaded and deeply immersed, or more or less
depressed when the load is light and the vessel is less deeply immersed.
Dated this 13th dov of January 1897
ABEL & IMRAY,
Agents for the Applicant.
An Improvement in Shallow Draft Vessels having Raised Propellers.
I, ALFRED FERNANDEZ YARROW of Isle of Dogs, Poplar, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to shallow draft vessels of the kind in which the pro-
peller works in a cavity hollowed in the lower part of the vessel, the propeller
being of such diameter that its blades do not extend below the keel but extend
above the level of the external water. In order that air may not be admitted to
the cavity in which the propeller works, the upper side of the cavity slopes both
ways downwards from the site of the propeller.
In order to reduce as much as possible the resistance to the water issuing from
the cavity at the stern, the rearward slope is made to terminate at the water line
or sufficiently below it to prevent access of air to the propeller..
My invention relates to means of accommodating this termination of the slope

page_text: to varying draughts of the vessel. I effect this by making part of the rearward
slope of the upper side of the cavity hinged so that it can be more or
less raised when the vessel is heavily loaded and deeply immersed, or more or less
depressed when the load is light and the vessel is less deeply immersed.
Fig. 1 of the accompanying drawings is a part longitudinal section and Fig. 2
is a part plan of a vessel of the kind above referred to arranged according to my
invention.
Fig. 3 is a transverse section on the line 3-3 of Fig. 2; Fig. 4 is a part trans-
verse section on the line 4-4 of Fig. 2.
Fig. 5 is a part longitudinal section shewing a modification.
A is the fixed roof of the cavity in which the propeller works. Under the rear
part of this roof I provide a false roof or shell B which is hinged at C as shewn
in Figs. 1, 2 and 3, or it might be hinged at D as shewn in Fig. 5, and the hinge
in the latter case may be as shewn a piece of flexible material such as leather.
The shell B is provided with two downwardly projecting cars E having horizon-
tally slotted holes in which are engaged studs projecting from each side of a nut F
fitting a screwed spindle G which passes up through a stuffing box and can be
turned by a hand wheel H. When the vessel is light, the water line W being
below the level of the end b of the shell B, then by turning the wheel H the shell
can be depressed to a position such as is indicated by the dotted lines B¹, its end 61
being then more or less submerged and preventing free access of air to the cavity
in which the propeller works. Although a little air may tend to pass between the
shell B and the roof A, this has no serious effect on the propulsion, as the rush of
water astern from the propeller practically prevents access of air through a passage
of small area such as that around the shell. K is a covered manhole by which access
can be had to the propeller.
Obviously instead of the screw for raising and lowering the false roof, other
mechanism might be employed or such mechanism might be dispensed with, the
false roof being allowed to take position automatically, being more or less supported
by the rush of water from the propeller, and a stop being arranged to prevent it
from descending beyond a certain distance.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
In combination with the propeller cavity of a shallow draught vessel, a false
roof or shell hinged to the sides or roof of the cavity so as to be raised or lowered
according as the vessel is heavily or lightly loaded, substantially as described.
Dated this 11th day of October 1897.
ABEL & IMRAY,
Agents for the Applicant.