IMPROVEMENTS IN MACHINERY FOR GRINDING AND PULVERISING
Year: 1873

page_text: LETTERS PATENT to Edward Lord, of Todmorden, in the County of
York, Machine Maker, for the Invention of "IMPROVEMENTS IN
MACHINERY FOR GRINDING AND PULVERISING."
Sealed the 23rd December 1873, and dated the 25th July 1873.
PROVISIONAL SPECIFICATION left by the said Edward Lord at the
Office of the Commissioners of Patents, with his Petition, on the
25th July 1878.
I, EDWARD LORD, of Todmorden, in the County of York, Machine
Maker, do hereby declare the nature of the said Invention for "Im-
PROVEMENTS IN MACHINERY FOR GRINDING AND PULVERISING," to be as
follows:-
My Invention is applicable to grinding and pulverising indigo and
other descriptions of dye materials, and for mixing sand and lime in the
manufacture of mortar, for grinding loam, and generally for grinding
and pulverising other materials.

page_text: In performing my Invention I make use of a dish or vessel which is
fixed on a revolving vertical spindle, and in which I make one or more
annular, curved, or angle grooves; the grinding rollers fit in the said
groove or grooves, and they are made in two or more parts, the centre
holes being larger than the axle on which they rotate, so that they may !
adapt themselves to the inequalities of the materials under operation.
This improved machinery produces the requisite grinding and pulver-
ising effect more rapidly and more effectually than the machinery now
in use.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Lord in the Great Seal Patent Office on
the 17th January‍1874. ·
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
LORD, of Todmorden, in the County of York, Machine Maker, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fifth day of July, in the year of
our Lord One thousand eight hundred and seventy-three, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Edward Lord, Her special licence
that I, the said Edward Lord, my executors, administrators, and
assigns, or such others as I, the said Edward Lord, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
MACHINERY FOR GRINDING AND PULVERISING," upon the condition (amongst
others) that I, the said Edward Lord, my executors or administrators,
by an instrument in writing, under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six

page_text: calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Edward Lord, 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 (that is to say) :-
My Invention is applicable to grinding and pulverising indigo and
other descriptions of dye materials, and for mixing sand and lime in the
manufacture of mortar, for grinding loam, and generally for grinding
and pulverising other materials.
In performing my Invention I make use of a dish or vessel which is
fixed on a revolving vertical spindle, and in which I make one or more
annular, curved, or angle grooves; the grinding rollers fit in the said
groove or grooves, and they are made in two or more parts, the centre
holes being larger than the axle on which they rotate, so that they may
adapt themselves to the inequalities of the material under operation.
This improved machinery produces the requisite grinding and pulver-
ising effect more rapidly and more effectually than the machinery now
in use.
-
And in order that my Invention may be fully understood, and readily
carried into operation, I will proceed to describe the accompanying
Sheet of Drawings, reference being had to the figures and letters marked'
thereon.
Fig. 1 is an end view, Fig. 2 a side elevation, partly in section, and
Fig. 8 a plan of my improved machinery for grinding and pulverising.
a is the foundation plate; b, b, the standards supporting the top
shaft o, on which are the fast and loose pulleys o³, o³, and the bevel
pinion c³, gearing into the wheel d³ on the vertical shaft d; this shaft
revolves above in a bearing in the cross beam e, and below in a footstep
in the foundation plate a. The parts above enumerated are made in the
ordinary manner. To the shaft d is fixed the dish or vessel f, the bottom
of which is formed with an annular angle groove; 9, 9, are the grinding
Grollers, which are made in several parts and have holes of a greater
diameter than the horizontal shaft h on which they are mounted; this

page_text: shaft is provided with an eye in the middle of its length for the vertical
shaft d to pass through; the ends of the shaft h are supported in sliding
blocks fitting in the standards b, b; the circumferences of the discs
forming the grinding rollers correspond with the angular groove in the
dish f, and they are held in their places laterally by the set washers h¹ 5
and by the pulley d³ which is loose on the shaft d and is held between
set washers.
When the machine is at work the indigo or other material to be ground
accumulates in the bottom of the annular groove and it is displaced by
the action of the grinding rollers 9, 9, the discs of which they are com- 10
posed being provided with holes larger than the shaft on which they are :
mounted, are at liberty to adapt themselves to the irregularities in the
material to be ground. By this means the grinding or pulverising is
effected more radidly and more effectually than heretofore, thereby not
only saving time and labour but economising the indigo, which is reduced 1
to the finest powder, and when mixed with water for dyeing purposes
gives off its colouring properties to the greatest advantage.
Fig. 4 is a section of a modification of my Invention. In this case
the dish or vesself is shewn with three annular angle grooves, and the
grinding rollers 9 are made to correspond.
20
It is evident that the number of annular grooves and their shape
may be varied according to the size of the dish or vessel and the particular
purpose for which it is to be used. In all cases the shape of the annular
groove is such that the material to be ground or pulverised accumulates
in the bottom of the groove or grooves and is acted upon by the grinding 2
rollers.
In some cases the grinding rollers instead of being made in discs, as
shewn in Fig. 2, may be made solid; and in ordinary mortar mills I
propose to apply grinding rollers made in two or more parts, as
described.
Having thus stated the nature of my Invention, and described the
manner of performing the same, I declare that I claim,-
3
First. The improved mode of constructing the dishes or vessels of
machines for grinding or pulverising, in which the material to be
operated upon is caused to accumulate in one or more grooves, as shewn 3
and described,.

page_text: And, Secondly. Making the grinding rollers in two or more parts, as
shewn and described.
In witness whereof, I, the said Edward Lord, have hereto set my
hand and seal, this Sixteenth day of January, One thousand
eight hundred and seventy-four.