Improvements in Hydraulic Oil Presses.
Year: 1895

page_text: Improvements in Hydraulic Oil Presses.
I HENRY GREENWOOD of Albion Works, Leeds, in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows:-
Many hydraulic oil extracting presses are now provided with pressing boxes or
cages of various forms of construction. These pressing boxes are usually so made,
that after the oil has been extracted, the box may be removed from the press, and
a freshly charged one inserted in its place, the first box being conveyed to a special
apparatus, where, by hydraulic power, the cakes or residue may be forced out of,
and a new charge of meal put into, the box.
Further to utilize the capacity of these boxes, the meal is compressed by a
hydraulic ram, and the resulting space is filled up with additional meal.
The operations of discharging the cakes from the pressing boxes, and filling
them with meal, do not, however, fully occupy the time necessarily allotted to such
operations.
Now the object of this improvement is to utilize the time otherwise wasted in the
cake-filling, compressing, and discharging apparatus, and for this purpose this latter
is made so strong and substantial as to allow not merely of the compression of the
meal in the pressing boxes, to condense it into cakes, but of the extraction of oil
therefrom, before submitting the boxes to the finishing press.
In this case, a
suitable collecting dish is provided to catch the exuding oil.
By subjecting the meal to this preparatory extracting pressure, not only is the
time during which the apparatus would otherwise be idle, utilised to the utmost,
but, as a large quantity of the oil has been extracted before the pressing box and
charge is removed to the finishing press, the work to be done in the latter is
materially reduced, and therefore is done in less time. The improvement described
is applicable to any box press in which the filling is done outside the finishing
press itself, whether the boxes are withdrawn by hand or mechanically, and
conveyed on carriages from press to filler, or whether the boxes merely swing on
the press columns.
The special apparatus referred to may either have two hydraulic rams, pressing
at both ends of the pressing box, or one only, according to the method adopted for
charging and emptying the boxes.
+
100
NEWTON & SON,
Agents for the Applicant.
Improvements in Hydraulic Oil Presses.
I HENRY GREENWOOD of Albion Works, Leeds in the County of York,
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:-
Many hydraulic oil-extracting presses are now provided with pressing boxes or

page_text: j
A is the kettle containing the meal to be pressed, mounted on a suitable framing
on a level with the top of the boxes or cages wherein the pressing is to be
"effected.
For the operation of pressing the meal, a series of boxes are usually employed.
In the drawings I have shown five boxes, b, and a set of five hydraulic
presses, B, B1, B2, B3, B4. This number may, however, be varied to suit require-
ments. The first hydraulic press B is the filling and emptying press, wherein a
box b is placed to receive its charge, and also to have its charge removed. It also,
by means of the bydraulic pistons c, c¹ which enter the box 6 from above and from
below, expresses a portion of the oil contained in the meal, immediately the filling
operation is completed. The meal from the kettle A is fed into the box b, while
in the press B, in a manner not differing from the methods usually employed,
dividing plates and pieces of cloth being used to separate the cakes in the ordinary
way.
After the box 6 has received its charge, and its contents have been subjected to.
sufficient pressure to extract some of the oil, which is caught in a suitably-arranged
receptacle beneath the press, the said box is moved from the press B onto the
truck or trolley D, which runs on rails "beside the presses; thereby it is carried
to one of the other presses B1, B2, &c., which consist of an upwardly working
ram e supporting the bottom of the box and a fixed head el entering the top thereof,
between which the contents of box are compressed, and the oil duly extracted
therefrom.
The trolley D is constructed to receive two boxes bat one time, so as to be
capable of taking a box containing cake already compressed, from one of the

page_text: presses B1, B2, &c., before substituting a box newly charged, previously received
direct from the press B. The trolley D is travelled and operated preferably by
means of the longitudinal shaft F, provided with fast and loose belt pulleys ff,ƒ³¹·
This shaft F slides within a pinion G carried by the trolley, and, when driven,
rotates the said pinion, either to traverse the trolley along the track by means of
suitable gearing connected with the travelling wheels, or to operate transversely
the sliding plates d¹ d², by which the lateral movement of the boxes b to and from
the presses is effected. Hand levers are provided, by means of which the
engagement or disengagement of the gearing is effected as desired.
It is obvious that other mechanical devices may be employed for removed the
freshly-filled box from the press B, for further and more complete pressure in
another press, and for returning the box to the press B, when the contents are to be
expelled after treatment. It will be seen, however, that, in the manner above
explained, one filling press can keep in operation several finishing presses, and
thereby an economy of time is effected, particularly as the contents of the boxes
have already received preliminary pressure before they leave the filling press as
above explained.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I. declare that what I
claim is :-
:-
1. The hereinbefore described improvements in oil presses, whereby an economy
of time in the operation of oil-extraction is effected, substantially as set forth.
2. The hydraulic oil-extracting apparatus herein before shown and described,
comprising a press B wherein a meal box is placed to receive the meal from the
kettle, and wherein pressure is applied by means of plungers entering the box from
above and from below, to partly extract the oil from the meal, substantially as set
forth.
Dated this 13th day of April 1896.
NEWTON & SON,
Agents for the Applicant.