Improvements in Grinding or Pulverizing Machinery.
Year: 1897

page_text: IDIONAL
Improvements in Grinding or Pulverizing Machinery.
I, WILLIAM WALTER HEWITT, Knockhall, Greenhithe, Kent, Cement Manufacturer,
do hereby declare the nature of this invention to be as follows:-
65
This invention has for its object improvements in grinding machinery of the
Lucop" and other similar types. In this class of mill rolls are caused to revolve
or travel round the inner side of a ring or path (on which the material to be
ground has been placed) by means of plain drivers with open or slotted
ends.
In some cases these drivers are made with renewable end, side and jaw pieces,
so as to diminish cost of wear and tear, but the number of parts necessary to
accomplish this is so great that this advantage is greatly minimised.
Now, by my invention I do away with these drivers. I place a boss or carrier
upon the shaft with suitable pins passing through it on to which I put loose arms
or drag links to carry the rolls, the rolls being connected with these arms or drag
links by spindles running through them. This allows the rolls to rise and fall
while being carried round the path, and the whole weight of the rolls, and part of
that of the arms, is brought to bear on the material to be ground.
In some cases I dispense with the rolls entirely and allow the drag links or
arms to do the grinding of the material upon the ring or path by allowing them to
play upon the ring instead of the rolls. These arms or drag links may be in one
or more pieces of suitable form.
By these means the whole of the interior of the machine consists of only a few
simple, inexpensive and easily renewable working parts. All this lessens the first
cost and upkeep of the machine, reduces the power required to drive it, and at the
same time increases its efficiency.
7
II machinery.
WILLIAM WALTER HEWITT, Knockhall, Greenhithe, Kent, Cement Manufacturer,
I 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
"
This invention has for its object improvements in grinding machinery of the
Lucop "and other similar types.

page_text: In this class of mill rolls are caused to revolve or travel round the inner side of
a ring or path (on which the material to be ground has been placed) by means of
plain drivers with open or slotted ends.
In some cases these drivers are made with renewable, end, side and jaw pieces,
so as to diminish cost of wear and tear, but the number of parts necessary to
accomplish this is so great that this advantage is greatly minimised.
Now by my invention I do away with these drivers. I place a boss or carrier
upon the shaft with suitable pins passing through it on to which I put loose arms
or drag links to carry the rolls, the rolls being connected with these arms or
drag links by spindles running through them. This allows the rolls to rise and
fall while being carried round the path and the whole weight of the rolls and part
of that of the arms is brought to bear on the material to be ground.
In some cases I dispense with the rolls entirely and allow the drag links or arms
to do the grinding of the material upon the ring or path by allowing them to play
upon the ring instead of the rolls. These arms or drag links may be in one or
more pieces of suitable form.
By these means the whole of the interior of the machine consists of only a few
simple, inexpensive and easily renewable working parts. All this lessens the first
cost and upkeep of the machine, reduces the power required to drive it and at the
same time increases its efficiency.

page_text: links instead of as is shown. The faces of the wearing parts may be made so
as to be renewed when worn. The ground material may be exhausted from the
machine by means of a fan.
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 :-
First. The method of grinding in a machine of the "Lucop" type by means of
loose arms, drag links or wipers instead of rolls substantially as shewn on drawing
and described in this specification.
Second. The method of grinding in a machine of the same type by means of
rolls carried with loose arms or drag links substantially as shewn on drawing and
described in this specification.
Dated the 18th day of June 1898.
WILLIAM WALTER HEWITT, *