AN IMPROVED MACHINE FOR GRINDING PIGMENTS OR OTHER VEGETABLE OR MINERAL SUBSTANCES
Year: 1852

page_text: LETTERS PATENT to George Kennedy Geyelin, of Camden Town,
London, for the Invention of "AN IMPROVED MACHINE FOR GRINDING
PIGMENTS OR OTHER VEGETABLE OR MINERAL SUBSTANCES."
Sealed the 16th April 1858, and dated the 23rd October 1852.
PROVISIONAL SPECIFICATION left by the said George Kennedy
Geyelin at the Office of the Commissioners of Patents, with his
Petition, on the 23rd October 1852.
I, GEORGE KENNEDY GEYELIN, of Camden Town, London, do hereby
declare the nature of the said Invention for "AN IMPROVED MACHINE FOR
GRINDING PIGMENTS OR OTHER VEGETABLE OR MINERAL SUBSTANCES" to be
as follows:-
The distinguishing principle of my improvements in machines for
grinding pigments and other vegetable substances is the employment
of three conical rollers working in a horizontal position. I show these
conical rollers in the annexed Drawings, in plan, vertical section, and
horizontal section.
Fig. 1, represents them in plan; Fig. 2, shows them in transverse
vertical section; and Fig. 8, in horizontal section.
It will be seen that they are in a reversed position one to another,
and they revolve at different speeds, by which arrangement their
rotation causes the substance to be ground to be drawn to their centre,
where the chief grinding power is exèrted. Steam or manual power

page_text: may be employed to turn the machine, which may be either fixed or
portable. It is not necessary here to describe the remaining portions
of the machine, they being much the same as in any other grinding
machine. A trough to contain the pigment or other substance, a funnel
or shoot, whence the substance is delivered to the rollers, cog and other
wheels, are common to all. I reserve the right to use these in their
present or modified form. I use regulating screws, by which incans the
gripe or bite of the rollers may be adjusted so as to grind fine or coarse
substances. In my machine the rollers may be readily raised from
their blocks to permit of cleaning or freeing from adhering substances,
of advantage more especially where fine or costly materials are ground.
When chocolate or cocon is to be ground "crushers" and "mixers"
are to be used; these, with my conical rollers, will produce a fine paste.
Lastly, the improved grinding machine may be used for grinding
dry substances, or, as is called in the trade, "in oil," and for various
pigments, mineral or vegetable substances.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Kennedy Geyelin in the Great Seal
Patent Office on the 23rd April 1853.
TO ALL TO WHOM THESE PRESENTS - COME, I,
GEORGE KENNEDY GEYELIN, of Camden Town, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of October, in the
year of our Lord One thousand eight hundred and fifty-two, in the
sixteenth year of Her reign, did, for Herself, Her heirs and succes-
sors, give and grant unto me, the said George Kennedy Geyelin, Her
special license that I, the said George Kennedy Geyelin, my executors,
administrators, and assigns, or such others as I, the said George Kennedy
Geyelin, 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
"AN IMPROVED MACHINE FOR GRINDING PIGMENTS OR OTHER VEGETABLE OR

page_text: MINERAL SUBSTANCES," upon the condition (amongst others) that I, the
said George Kennedy Geyelin, by an instrument in writing under my
hand and seal, 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 calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said George Kennedy Geyelin, do
hereby declare the nature of the said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof (that is to say):
My Invention consists of combining together for grinding purposes
rollers of a conical form, that is, whose diameter towards one end is
larger than that towards the other, and with the smaller diameter
of one roller to the larger diameter of the adjoining, whereby the
surfaces in contact will be travelling at differing surface speeds; and, in
addition to the crushing influence exerted by pressure of the grinding
surfaces rotating together, a grinding action will be exerted upon the
matters under operation in the direction of the length of the rollers.
In order that the Invention may be fully understood I will proceed
to describe the means pursued by me.
DESCRIPTION OF THE DRAWINGS.
Figure 1, shows a side view; Figuro 2, a plan; and Figure 8, a
section of parts of a machine, arranged according to my Invention.
a, a, is the framing; b, b', 2, are three grinding rollers whose surfaces
are revolving together, their axes being geared together as shown; c, c',
are fast and loose nullies on the axis of the centre grinding roller, to

page_text: 6, 6, and again ground by contact of those surfaces; and such
matters are withdrawn from the roller 6, by means of a scraper 9,
affixed to the guide or conductor g', which rests by its axes g², on
projections a', formed on the framing, and has a weighted lever g³,
by which the edge of the scraper g, is kept bearing against the
surface of the roller 62. The axes 9, are embraced by the links h,
which at their other ends embrace the axis of the roller 6, by which,
whilst that roller will be capable of sliding with its bearing, the scraper
will retain the same relation thereto. The matters scraped off by the
instrument g, will be conducted to any suitable receiver. For grinding
pigments I form the grinding rollers of granite, but this will be
modified according to circumstances and the nature of the substance to
be ground, as will also the character of the grinding surface of such
rollers; and in some cases I apply one set or series of such conical
rollers over another set, the upper set in such case acting as crushers or
mixers for the matters which are more fully ground by the lower set.
Having thus described the nature of the said Invention, and in what
manner the same is to be carried into effect, I would have it under-
stood that I do not confine myself to the arrangement above described,
and reserve to myself the right to use them in that or other modified
form; as, for instance, although I have shewn only three rollers of the
character described working together, I sometimes use other numbers.
But what I claim is,-
The arranging a machine for grinding purposes, having rollers of the
character described.
In witness whereof, 1, the said George Kennedy Geyelin, have
hereunto set my hand and seal, this Sixteenth day of April, in
the year of our Lord One thousand eight hundred and fifty-three.
Witness,
WILLIAM BROOKES,
Patent Agent,
78, Chancery Lane.
GEO. K. GEYELIN. (L.S.)