Improvements in Hay and other Screw Presses.
Year: 1889

page_text: Date of Application, 8th Apr., 1889
Complete Specification Left, 7th Dec., 1889-Accepted, 8th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Hay and other Screw Presses.
1, EDMUND JAMES YATES, of 13, Fazackerley Street, Preston, in the County of
Lancaster, Mechanical Engineer, do hereby declare the nature of this invention to be
as follows:-
My improvements relate to hay and other screw presses in which the pressure
obtains between a lower fixed bed plate and an upper movable plate or press plate
hung to the lower extremity of a vertical screw whose rotation in one direction or the
other raises or lowers the press plate accordingly.
My invention consists in providing means for more rapidly lowering and raising
the press plate. To this end instead of passing the vertical screw through a fixed
solid nut as is usual in the ordinary arrangements of such apparatus I employ a nut
divided vertically and centrally into two separate halves capable of being opened out
so as to leave and be clear of the screw or to be closed in thereupon so as to he in
gear therewith through the medium of reciprocating cams or cranks operated
simultaneously by an outside hand lever. I balance the press plate by means of
weights hanging from chains or cords passing over overhead pulleys and fastened
below to the two ends of the press plate which may be arranged to work between
vertical guide pillars or slides of any suitable kind. The action of the apparatus as
above described is as follows :-
When the divided screw nut is in its opened out position (and therefore out of
gear with the vortical screw) the counterbalanced press plate and with it the vertical
screw above may then be freely slided up or down by hand to any desired position
and when brought down upon the material or article or articles to be pressed the
divided nut is then by means of the hand lever caused to close in and be in gear
with the screw which may thereupon be rotated so as to impart the required amount
of downward pressure.
It will be observed that by the use of my invention the rotation of the screw for
the purpose of raising the press plate is unnecessary and that only when actually
imparting pressure is the rotation of the screw required considerable time and labour
being thus saved.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Hay and other Screw Presses.
1 EDMUND JAMES YATES, of Boathouse Farm, Penworthan, near Preston, in the
County of Lancaster, Mechanical 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 :-
My improvements relate to Hay and other Screw presses, in which the pressure
obtained between a lower fixed bed plate and an upper moveable plate or press-plate
hung to the lower extremity of a vertical screw whose rotation in one direction or the
other raises or lowers the press-plate accordingly.
My invention consists in providing means for more rapidly lowering and raising
the press-plate A (Fig. 1 & 2). To this end instead of passing the vertical screw B
(Fig. 1) through a fixed solid nut as usual in ordinary arrangements of such
apparatus. I employ a nut divided vertically and centrally into two separate halves
capable of being opened out so as to leave and be clear of the vertical screw B in
DQ27

page_text: Figures 1 & 2 or to be closed in thereupon so as to be in gear with the vertical
screw B in Figures 1 & 2 through the following movements-action. I, in Figures, 3.
4. 9 & 10. is shown a round plate fixed to a shaft J in Figs. 3. 4. 9 & 10 in the
centre which passes through a bearing to the outside hand wheel or hand lever as
shown at P'Figs. 1. 2. 3. 4 & 9. 10. The round plate I shown in Figs. 3. 4. 9. 10.
two radial grooves are cut running from the centre towards the outside edge, as
shown at Qin Figs. 3 & 9. In each half of the nut I fix a pin which is shown
at M in Figs. 3. 4. & 9. 10, which is to slide freely in the radial grooves Qin
Figs. 3 & 9 cut in the round plate I in Figs. 3. 4. 9. 10. Thus if I turn the
round plate I it will bring the pins to the end of the grooves Q, as shown in
Fig. the two halves of the nut will be drawn together and be in gear with the
vertical screw B in Figs. 1. 2. 3. 9 10. If the round plate I is turned back on
its own centre, it will cause the pins M to slide to the other end of the grooves Q
which is running away from the centre as shown at M in Fig. 9. This will cause
each half of the nut to be out of gear with the vertical screw B in Figs. 1. 2. 3. 4.
9. 10. At K in Figs. 56 shows a double crank or eccentrics set in direct opposite
direction to each other. To suit each crank or eccentric a vertical slot is made.
To fit on the cranks or eccentrics horizontally as shown in K at Figs. 5 6 a cap is
made and is fixed by two set screws.
By this arrangement the cranks or eccentrics are connected to each half of the
nut as shown at K in Figs. 5 & 6. The vertical slot R in Fig. 5 is made to
allow the cranks or eccentrics to move up and down freely, so that when the crank
or eccentric shaft O in Figs. 5 & 6 is turned half way round, along with the
cranks or eccentrics slide each half of the nut. At K in Fig. 6 shows the nut in
gear with the vertical screw B in Figs. 5 & 6. If we turn the crank or eccentric
shaft in Figs. 5 6 half way round, it will push the half of the nut on the
opposite side of the vertical B in Figs. 56 and pull that half of the nut that is on
the same side as the cranks or eccentrics, which would cause the two halves of the
nut to be out of gear with the vertical screw B in Figs. 5 6.
The nut can be put in and out of gear with the vertical screw B Figs. 1 & 2
with a right and left hand screw. It is most suitable in this case to have the
halves of the nut to slide in dovetail grooves under the box H in Figs. 1 & 2. A
lug is cast on each half of the nut which projects out in front of the machine,
(the front of the machine is as is shown at Fig. 1). In each lug projecting from
each half of the nut threads are cut, in one lug is cut a right hand thread, and in
the other a left hand thread is cut. The above mentioned right and left hand
screw is made to fit in each lug, and run horizontally along the machine to the
right, on which is fixed a hand lever with a ball or weight at the end. By turning
the hand lever once round, it will cause by the action of the right and left hand
threads to close in on the vertical screw B in Figs. 1 & 2 and be in gear
therewith. If we turn the hand lever round back, this will cause each half to
move away from the centre, and be out of gear with the vertical screw B in
Figs. 1 & 2.
The balled lever as shown at V in Figs. 7 & 8 which is fixed to the shaft S in
Figs. 7 & 8 this shaft passes through each side which acts as bearings. On the end
of the shaft S in Figs. 7. 8 that comes through, to the front, of the machine a hand
lever is fixed, with a ball or weight at the end. Holes are drilled in each half of the
nut, in which the balls on the end of the lever V are to fit in as shown Figs. 7. 8.
The bottom hole, that the ball on the end of the lever V in Figs. 7 & 8 is fit in is
connected to that half of the nut that is on the right hand side of the vertical
screw B in Figs. 7 & 8, which is made to slide freely horizontally in the box H in
Figs. 7 & 8.
The top ball on the end of lever V in Figs. 7 & 8 is connected to
that half of the nut that is on the left of the vertical screw B in Figs. 7 & 8 which
is also made to slide freely in the box H in Figs. 7 & 8. The two halves of the nut,
are, so arranged that when the outside hand lever is thrown over, about a third of
the circle, from one side to the other the two halves of the nut are firmly locked.
Thus it will be seen, that by working the hand lever from one side to the other,

page_text: Causes
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screw B in Figs. 7 & 8.
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WEDGE MOTION.
In this I employ two wedges vee or dovetailed on each edge, to fit in dovetailed
grooves in the back of each half of the nut, and fit the same way on the other side
or edge of the wedge, a dovetailed groove being cut in the sides of the box H in
Figs. 1&2. to fit that on the edge of the wedge; the wedges are fit in contrary
to each other, the one which I fit in on the left hand, has the thick end of the
wedge to the front, (front of the machine as seen at Fig. 1) the other wedge is put
in from behind the machine, and has the point or thin end to the front at the right.
The taper of the wedges in both cases is on the side that fit in behind each half of
the nut. At the end of each wedge in front the machine, a stud is fixed, a con-
necting lever is made to fit on both studs, in the centre of the connecting lever a
stationary stud is also fitted so as to give a rocking motion, the holes are made long
enough in the ends of the lever so as to allow each stud in each wedge to travel
up and down with the rocking motion. On both ends of the connecting lever, a
handle is put. Thus if we pull the right hand handle we push in the left wedge
and pull in the right also which will cause the nut to be in gear with the vertical
screw B in Figs. 1 & 2. If we pull the handle on the left, it will draw the
wedges to their thinner point, and draw with them each half of the nut, which
will cause the nut to be out of gear with the vertical screw B in Figs. 1 & 2.
I balance the press plate A in Figs. 1 & 2 by means of weights D in Figs. 1 & 2
hanging from chains or cords passing over overhead pullies E in Figs. 1 & 2 and
fastened below to the two ends of the press plate A in Figs. 1 & 2 which may
be arranged to work between vertical guide pillars F in Figs. 1 & 2 or slides
of any suitable kind. The action of the apparatus as above described is as follows.
When the divided nut is in its opened out position (and therefore out of gear with
the vertical screw B in Figs. 1 & 2), the counterbalanced press plate A in
Figs. 1 & 2 and with it the vertical screw B in Figs. 1 & 2 may be freely slided up
or down to any desired position by hand, and then be brought down upon the material
or article or articles to be pressed.
The divided nut is then, by means of a hand lever or hand wheel caused to be
closed in and be in gear with the vertical screw B in Fig. 1-2 which may be
therefore rotated so as to impart the required amount of downward pressure.
It will be seen that the holes G in Fig. 1 & 2 in the top and bottom of the box H
Figs. 1 & 2 in which the dividing nut slides is bored to the size of the top of thread
of the vertical screw B in Figs. 1-2 so as to form a guide for the vertical screw B
in Figs. 1 & 2 when the nut is in its opened out position and out of gear.
It will be observed that by the use of my invention the rotation of the vertical
screw for the purpose of raising or lowering the press plate is unnecessary, and that
only when actually imparting pressure, is the rotation of the vertical screw required,
considerable time and labour being thus saved.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what the same is to be performed, I declare that what I claim is:
The split or dividing nut, for Screw Presses.
DL: CIL
L1000