Improvements in Machines for Pressing and Weighing Hay and other Materials.
Year: 1897

page_text: Improvements in Machines for Pressing and Weighing Hay and
other Materials.
I, JOHN EDWARD SHARMAN PERKINS, of Queen Street Ironworks, Peterborough,
in the County of Northampton, Engineer, do hereby declare the nature of this
invention to be as follows:-
The object of this invention is to protect the centres of the weighing apparatus
of machines for pressing and weighing hay and other materials from damage,
especially when being moved from place to place.
To accomplish this I mount the fixed centres or fulcrum of the weighing
machine on a frame which can be raised or lowered in slides attached to the
frame of the machine, or the fulcrum centres are mounted upon a rocking frame
pivoted to the machine frame.
To put the weighing machine out of use, the frame carrying the fulcrum
is lowered by means of levers, eccentrics, screws or other means, the weighing
beam falling with the fulcrum until the centres which carry the weighing table
are clear, when the motion of the beam is arrested by stops, the frame being
further lowered until the fulcrum is clear.
In some cases the frame carrying the fulcrum is held up in its place by a
spring, so as to yield slightly should the truss of hay be thrown violently on to
the table, and to yield sufficiently to allow the platform to rest on the frame
of the machine (without putting undue pressure on the centres of the weighing
apparatus) should the pressure be applied without lowering the frame carrying
the fulcrum.
In some cases and especially in that class of weighing apparatus which has
the weighing and counterpoise weights sliding on or suspended from the beam,
I raise one end of the beam until the other end is clear of the platform and
rests on stops attached to the machine, and continue raising it until the centres
of the fulcrum are carried clear; the raised end being secured in position by a
spring hook or other convenient method.
In some cases instead of removing the centres of the weighing beam fromi
contact with their supports I fix the weighing table securely to the frame of
the machine, and hold down the other end of the weighing beam by a spring
attachment, so as to keep all the centres in close contact and prevent the vibra-
tion of the beam.
Dated this 30th day of December 1897

page_text: Improvements in Machines for Pressing and Weighing Hay and
other Materials.
I, JOHN EDWARD SHARMAN PERKINS, of Queen Street Ironworks, Peterborough,
in the County of Northampton, 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:―
.b
The object of this invention is to protect the centres of the weighing apparatus
of machines for pressing and weighing hay and other materials from damage,
especially when being moved from place to place.
It is also suitable for use with portable weighing machines for other purposes.
To accomplish this I mount the fixed centres or fulcrum of the weighing
machine on a frame which can be raised or lowered in slides attached to the
frame of the machine, or the fulcrum centres are mounted upon a rocking frame
pivoted to the machine frame.
To put the weighing machine out of use, the frame carrying the fulcrum
is lowered by means of levers, eccentrics, screws or other means, the weighing
beam falling with the fulcrum until the centres which carry the weighing table
are clear, when the motion of the beam is arrested by stops, the frame being
further lowered until the fulcrum is clear.
In some cases the frame carrying the fulcrum is held up in its place by a
spring, so as to yield slightly should the truss of hay be thrown violently on to
the table.
In some cases and especially in that class of weighing apparatus which has
the weighing and counterpoise weights sliding on or suspended from the beam,
I raise one end of the beam until the other end is clear of the platform and
rests on stops attached to the machine, and continue raising it until the centres
of the fulcrum are carried clear; the raised end being secured in position by a
spring hook or other convenient method.
In some cases instead of removing the centres of the weighing beam from
contact with their supports, I fix the weighing table securely to the frame of
the machine, and hold down the other end of the weighing beam by a spring
attachment, so as to keep all the centres in close contact and prevent the vibra
tion of the beam.
DESCRIPTION OF DRAWINGS.
In Figures 1, 2 and 3 Sheets 1 and 2 the beam of the weighing apparatus A
carries the weighing platform on the centre B, and the platform for the weights
on the centre C. D is the centre resting in the fulcrum formed by the block E
sliding between the guides F F.
G is a shaft running across the frame of the machine to which are keyed
the 2 cams H H and the handle I. When the handle I is in the position shown
the block E is clear of the centre D and the weighing beam rests on the
supports JJ, the centres BC also being clear of the blocks carrying the plat-
forms, and the platforms resting on the frame of the machine.
When the handle I is turned to the left the larger part of the cam H comes
in contact with the sliding blocks E which it raises until they come in contact
with the centres D and raise the weighing beam clear of the support J J, and
until the weight of the platforms is taken by the centres B C. The apparatus
is then in position for weighing.
Figures 4, 5 and 6 Sheets 3 and 4 show a modification of the apparatus in
which the movable weight K hangs from the centre C. In this form of the

page_text: apparatus the block E is a fixture and to move the centres out of contact for
travelling the outer end C of the lever is raised until the outer end rests on the
support J. A slight additional raising of the outer end of the beam carries
the centres D D clear of the blocks in which they work. The outer end of the
beam is then secured in position with the spring catch L. The drawing shows
the weighing beam in the position for travelling secured by the spring catch L
and with the movable weight K removed.
The
Figure 7 shows a modification of the apparatus in which instead of moving
the centres D B clear of their supports they are held in close contact.
table M is secured to the frame of the machine by a screw bolt N and the outer
end of the weighing beam is held down by a spring catch L. By keeping all
the centres in close contact vibration and consequent wear of the centres when
the machine is being moved from place to place are prevented.
Figure 8 Sheet 2 shows in elevation and section the block E which forms
the fulcrum of the weighing beam A being carried by the spring P and free
to move up and down in the guides F F it yields slightly when the weight is
thrown upon the table.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. The construction of weighing apparatus specially in connection with
machines for pressing and weighing hay in such a manner that the centres can
be removed from contact when desired substantially as described.
2. The construction of weighing apparatus specially in connection with
machines for pressing and weighing hay in such a manner that the centres can
be kept in close contact when the machine is being moved from place to place
substantially as described.
3. The construction of weighing apparatus especially in connection with
machines for pressing and weighing hay in which the fulcrum is supported
by springs substantially as desired.
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