IMPROVEMENTS IN OR RELATING TO APPARATUS FOR GRINDING PAINT AND OTHER LIKE SUBSTANCES
Year: 1879

page_text: LETTERS PATENT to Matthew Parker Ismay, of Ousebarn, Newcastle upon
"
Tyne, for the Invention of IMPROVEMENTS IN OR RELATING TO APPARATUS
FOR GRINDING PAINT AND OTHER LIKE SUBSTANCES."
Sealed the 21st March 1879, and dated the 15th January 1879.
PROVISIONAL SPECIFICATION left by the said Matthew Parker Ismay at.
the Office of the Commissioners of Patents on the 15th January 1879.
MATTHEW PARKER ISMAY, of Ousebarn, Newcastle upon Tyne. " IMPROVE-
MENTS IN OR RELATING TO APPARATUS FOR GRINDING PAINT AND OTHER LIKE
SUBSTANCES."
My Invention relates to means or appliances employed in combination with
apparatus for grinding paint and other like substances, for the purpose of feeding
or delivering the substance to be operated upon to the grinding apparatus, and for
effecting its discharge when ground from the said apparatus.
In carrying out my Invention the feeding apparatus consists of an upright
revolving shaft having fast thereon a disc, which forms the bottom of the receptacle
for the substance (say, for example, white lead) to be operated upon, and also having
secured thercon an annular vertical ring or cylinder forming the sides of the said
receptacle, and which is mounted on the shaft in such a position that a space will
be left between the lower extremity of the sides and the upper surface of the disc
or bottom, through which space passes one or more stationary knives, according to
the number of grinding apparatus which are to be simultaneously supplied. The
bottom of the receptacle may be either flat or inclined from the centre to its peri-
phery, and the ring or cylinder forming the sides of the receptacle may be made
adjustable upon the shaft, so as to regulate the size of the space between the sides
and bottom to suit the feed required, the knife or knives being changed to correspond
in size to the said adjustment. The knife (or each knife when more than one are
employed) is fixed at one extremity outside the receptacle, and at its inner extremity
is in contact with the vertical shaft, its lower edge resting upon the bottom of the
receptacle. A hinged or otherwise adjustable plate may be arranged in connection
with the knife, so as to admit of the discharge from the receptacle to the grinding
apparatus being regulated as required.

page_text: In operating with this apparatus the white lead (for example) is supplied to the
receptacle, and the shaft carrying the bottom and sides being in motion the same
are caused to travel respectively over or in contact with the bottom and top edges
of the knife, which discharges the white lead continuously into the grinding appa-
ratus arranged beneath it. If required (as, for example, in the case of soft
substances) the receptacle may be surrounded by a stationary casing, in order to
prevent any liability of the material being discharged at any other part of the
bottom than where the knife or knives are situate.
The apparatus for collecting and discharging the white lead (for example) which
has been operated upon consists of a revolving annular basin arranged beneath the
point of delivery from the grindstones or other grinding apparatus, and of a
stationary knife or scraper extending across the annular bottom of the said basin,
the white lead delivered into the basin from the grinding apparatus being thus
continuously discharged as each portion of the basin in its revolution passes suc-
cessively beneath the knife or scraper. The basin may be slightly inclined, and, if
desired, be let into the lower stone, suitably recessed for that purpose, and it may
be otherwise shaped so as to prevent the escape of any portion of the paint over the
inner periphery of the basin.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Matthew Parker Ismay in the Great Seal Patent Office on the 15th
July 1879.
MATTHEW PARKER ISMAY, of Ouseburn, Newcastle upon Tyne.
" IMPROVE-
MENTS IN OR RELATING TO APPARATUS FOR GRINDING PAINT AND OTHER LIKE
SUBSTANCES."
My said Invention relates to means or appliances used in combination with
apparatus for grinding paint and other like substances, and it consists in the
employment of a revolving receptacle in combination with a stationary knife or
knives for feeding or delivering the substance to be operated upon to the grinding
apparatus.
And in order that my said Invention may be fully understood, I shall now pro-
ceed more particularly to describe the saine, and for that purpose shall refer to
the several Figures on the annexed Sheet of Drawings, the same letters of
reference indicating corresponding parts in all the Figures.
Figure 1 of the accompanying Drawings is a sectional elevation, and Figure 2 is
a plan of an apparatus constructed according to my said Invention for feeding or
delivering the substance to be operated upon to the grinding apparatus.
The feeding apparatus consists of an upright revolving shaft A having fast
thereon a disc B, which forms the bottom of the receptacle for the substance (say,
for example, white lead) to be operated upon, and also having secured thereon an
annular vertical ring or cylinder C forming the sides of the said receptacle, and
which is mounted on the shaft A in such a position that a space a will be left
between the lower extremity of the sides C and the upper surface of the disc or
bottom B, through which space passes one or more stationary knives D, according
to the number of grinding apparatus which are to be simultaneously supplied (one
being shewn in the example illustrated). The bottom B of the receptacle may be
either inclined from the centre to its periphery, as shewn, or flat if preferred, and
the ring or cylinder C forming the sides of the receptacle may be made adjustable
upon the shaft, as indicated, so as to regulate the size of the space between the
sides C and bottom B to suit the feed required. This adjustment is effected in the
example illustrated by the act of turning the nuts F, F, which are adapted to
screws e connected to the cylinder, and take their bearing against a disc E fast on
the shaft A. It is preferred to make the knife compound, as shewn in the
Drawing, the same consisting of a body b, the knife proper c, and a scraper d.
body b is formed at one end with a ring b', which encircles the shaft, and is kept
from rising by the washer H, the same being secured to the shaft by set screws h, h.
The opposite end 62 of the body b to that at which the ring b¹ is formed is secured
to any fixed point outside the receptacle, the body at its lower edge resting upon
the bottom of the receptacle. In the Drawing, Figure 1, I have shewn the body by
straight lines, and the view distorted for the facility of elucidating the operation of
the apparatus. The knife proper c is attached to the side of the body b so as to be
capable of sliding in and out in order to regulate the feed, whilst above the body
and the knife is fixed the scraper d, which fits closely to the sides of the receptacle,
so as to cut or remove therefroin the substance under operation.
The
In operating with this apparatus. the white lead (for example) is supplied to the
receptacle, and the shaft carrying the bottom B and sides C being in motion, the
same are caused to travel respectively over or in contact with the lower and upper
edges of the stationary knife D, which discharges the white lead continuously into
the grinding apparatus arranged beneath it. If required (as, for example, in the
case of soft substances) the receptacle may be surrounded by a stationary casing, in
order to prevent any liability of the material being discharged at any other part of
the bottom than where the knife or knives are situate.

page_text: When two or more knives are employed for supplying a corresponding number of
grinding apparatus, it is only necessary that one knife should extend to the centre
of the feeder, as shewn in the Drawing, for the purpose of working the substance
from the centre to the circumference; the other knife or knives may extend
inwards from the circumference only to a sufficient distance to secure the feed
required.
Motion may be imparted to the feeding apparatus in any usual well known
manner, as, for example, by forming teeth ou the periphery of the feeder, with which
engages a driving pinion.
Having now described and particularly ascertained the nature of my said Inven-
tion, and the manner in which the same is or may be used or carried into effect,
I would observe in conclusion that what I consider to be novel and original, and
therefore claim as the Invention secured to me by the hereinbefore in part
recited Letters Patent is,-
The employment of a revolving receptacle, in combination with a stationary
knife or knives, for feeding or delivering the paint or other like substance to be
operated upon to the grinding apparatus, substantially as hereinbefore described.
In witness whereof, J, the said Matthew Parker Ismay, have to this my
Specification set my hand and seal, the Seventh day of July, One thousand
eight hundred and seventy nine.
MATTHEW PARKER ISMAY. (L.S.)