IMPROVE- MENTS IN MACHINERY FOR GRINDING PIGMENTS, COLORS, AND OTHER MATTERS
Year: 1852

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, 1, HARLES
JACK, of Tottenham Court New Road, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Twenty-ninth day of
March, One thousand eight hundred and fifty-two, in the fifteenth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Charles Jack, my exors, adññors, and assigns, Her especial licence,
full power, sole privilege and authority, that I, the said Charles Jack,
my exors, adñiors, and assigns, or such others as I, the said Charles Jack,
my exors, adors, or assigns, should at any time agree with, and no others,
from time to time and at all times during the term of years therein expressed,
should and lawfully might make, use, exercise, and vend, within England,
Wales, and the Town of Berwick-upon-Tweed, my Invention of "IMPROVE-
MENTS IN MACHINERY FOR GRINDING PIGMENTS, COLORS, AND OTHER MATTERS;"
in which said Letters Patent is contained a proviso that I, the said Charles
Jack, shall cause a particular description of the nature of my said Invention,
and in what manner the same is to be performed, by an instrument in
writing under my hand and seal, to be inrolled in Her said Majesty's High
Court of Chancery within six calendar months next and immediately after
the date of the said in part recited Letters Patent, as in and by the same,
reference being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Charles Jack, do hereby declare that the nature of my said Invention, and

page_text: ascertained in and by the following statement thereof, reference being had to
the Drawing hereunto annexed, and to the figures and letters marked thereon,
that is to say:-
DESCRIPTION OF THE DRAWING.
Figure 1 shows a back elevation of the machine, and Figure 2 shows an
end view thereof. This machine is so constructed that the matters to be
ground are received between two rollers or cylinders and a concave fixed
surface, and they are rubbed or ground by being carried through by the roller.
a, a, is the framing of the machine, the nature of which is shewn by the
Drawing. b is a roller or cylinder, of stone or other suitable material. c is a
concave surface of stone or other suitable material, corresponding with the
circumference of the roller or cylinder; this, when used, is fixed as near as
may be required to the roller or cylinder b, and it is capable of being fixed or
adjusted in regard to the cylinder 6 by means of screws d, d, which are simul-
taniously put in motion by the crank handle e and wheels ff, and the surface c
is guided and kept correct in position by means of the projections g, g, and the
guides h, h, as shewn. i is a pressing roller, between which and the roller b
the matters to be ground are first pressed as they revolve at the bottom of the
hopper, there being grooves around the rollers or cylinders b and i for
receiving the ends of the hopper j, and so as to prevent the matters getting
away in those directions. k is a scraper moving on axes or necks at each end,
and the scraper is kept up to the surface of the cylinder 6, and caused to press
more or less closely by screws 7, one at each end. The materials to be ground,
such as paints or other matters, having been first roughly mixed with the oil or
fluids used, are put into the hopper, and a rotatory motion is to be communi-
cated to the roller 6 by any suitable power, applied by strap or otherwise, to
the axis of that roller b. The effect of this arrangement will be, that the
matters will be carried down between the roller 6 and the surface c, and, by
rubbing between them will be ground; as the parts of the surface of the roller
or cylinder come beyond the surface c, the matters will be scraped off and fall
into any suitable receiver placed below.
In witness whereof, I, the said Charles Jack, have hereunto set my
hand and seal, this Twenty-eighth day of September, in the year of
our Lord One thousand eight hundred and fifty-two.
CHARLES (L.S.) JACK.

page_text: AND BE IT REMEMBERED, that on the Twenty-eighth day of September,
in the year of our Lord 1852, the aforesaid Charles Jack came before our said
Lady the Queen in Her Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained and specified, in form above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.
T