Improvements in Mechanical Presses for Baling Hay, Straw, Cotton, Wool, and for other Analogous Purposes.
Year: 1890

page_text: Date of Application, 12th Feb., 1890-Accepted, 15th Mar., 1890
Improvements in Mechanical Presses for Baling Hay, Straw, Cotton,
Wool, and for other Analogous Purposes.
I ROBERT DAVISON of Picksley Sims and Co. Limited of Bedford Leigh, Lancashire
Manager do hereby declare the nature of my said 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 construction and arrangement of an improved
mechanical press whereby greater power is obtained in a more compact form than
hitherto and suitable for baling hay, straw, cotton, wool, hemp, esparto, jute, fodder,,
litter and for pressing other fibrous substance or for analogous pressing purposes.
On the accompanying drawing Fig. 1. is a front view and Fig. 2 an end view of a
screw press embracing my improvements, Fig. 3 is an end view of the depending
bars and guide rails hereinafter described.
In performing my invention I employ the usual construction of wooden or other
frame a for supporting the fixed platten 6 and movable platten c between which the
materials are pressed and the improvements relate to the means of raising and
lovering or otherwise traversing the movable platten c. To effect this I employ a
specially constructed screw d running the length of the framework and having one or
more sets of right hand screw threads (by preference rectangular) extending from one
end of the screw to the other and across these right hand threads I cut a corresponding
series of left hand screw threads and of equal pitch and thus I obtain a right and left
handed screw for operating the press as hereinafter described. From the fixed
platten 6 I have suspended as illustrated a pair of depending bars e and e' one of the
bars e being connected at its extremity to a trunnion or pivot f upon a half nut g
mounted on or gearing with one side of the screw d and the other rod e' similarly
connected to a half nut g' on or gearing with the opposite side of the same screw.
To keep the half nuts g and g¹ in contact with the screw thread and to support
and guide the bars e and e¹ in their to and fro motion I mount friction bowls or
rollers h at their extremities which are designed to run along flanged guide rails i
fixed on the base of the frame a on either side of and parallel with the screw d.
It will now be apparent that by revolving the screw d say by a hand wheel d¹
keyed at one extremity the half nuts g and g¹ will be caused to run along the said
screw in opposite directions say towards the centre and then (being only half nuts)
they will pass each other and continue their course along the whole length of the
screw. In this manner the rods e and e¹ are caused to lie down or approach the
horizontal position as indicated by the dotted lines in Fig. 1. and with an accellerating
speed. The press being thus lowered the movable platten c is received in its lowest
position upon a series of spiral springs to break the fall and render the stopping
perfectly noiseless. In closing the press again the reverse operation takes place
but with a constantly decreasing speed as the pressure is required to be put on..
The reversing of the screw d can be effected by hand-compound-gear consisting of
a driving shaft j upon which two different sized spur wheels k and I are mounted
to run loosely each of the said wheels having a clutch and gearing into proportionate
spur wheels m and n keyed to the screw d. By having a clutch box o capable of
sliding on a fixed key on the driving shaft to slide into contact with either of the
clutches on the spur wheels at will I am enabled to obtain a quick or slow movement
as desired.
To drive the press by power I prefer to employ a driving shaft p at right angles
to the screw d as illustrated in Fig. 4.
Upon this driving shaft p I have a pair of bevil wheels 9 and r mounted loosely
and with a sliding clutch box s arranged between them. These bevil wheels q and r
gear at opposite sides of its axis with a bevil wheelt keyed upon the screw d

page_text: and arranged with two sets of bevilled-teeth one forming a large wheel u to give
power and the other smaller wheel to give speed. In this manner I also obtain
a reversing motion capable of being brought into, gear without stopping the driving
shaft.
Having thus particularly described and, ascertained, the nature of this my said
invention and in what manner, the same is to be performed I declare that what I
claim is..
"
T
1st. The improved construction. and arrangement of screw.press with a movable
platten provided. with depending rods operated by half. nuts on opposite sides. of a.
right and left handed screw substantially as and for the purposes. hereinbefore..
described and.illustrated,on, the accompanying drawing..
2nd. In the construction of a screw, press the employment, of a right, and, left.
handed screw in, combination with half nuts, mounted on opposite sides thereof and
carried at the extremities of a pair. of rods depending, from the moving platten,
and guided along suitable guide rails all mounted and operating substantially as
herein before described and illustrated on the accompanying drawing....
Dated this 11th day of February 1890
JOHN G. WILSON,
Patent Office, 55; Market Street, Manchester, Agent for the Applicant.