Improvements in Machines for Grinding White Lead, Paint, Printing Ink, and other similar Substances or Compounds.
Year: 1888

page_text: Date of Application, 6th Nov., 1888
Complete Specification Left, 27th July, 1889-Accepted, 31st Aug., 1889
PROVISIONAL SPECIFICATION.
Improvements in Machines for Grinding White Lead, Paint, Printing
Ink, and other similar Substances or Compounds.
I, HENRY CLARK of 18 Bear Lane, Southwark, in the County of Surrey, Engineer
do hereby declare the nature of this invention to be as follows:
-
The object of this invention is to combine in one machine a sufficient number of
grinding rollers to effectually grind whatever materials are presented to it without the
necessity of removing them to a further grinding by a second machine, thus
effecting considerable economy in the machine itself and in the labour attending
its working.
For the purpose of carrying out this invention I make a pair of strong vertical
and parallel metal frames and bolt them together by horizontal stays furnished with
shoulders, and with their extremities screwed so as to pass through holes in the sides of
the frames and be securely attached thereto by nuts. Near the centre of the frame
and parallel with the stays, mounted in suitable bearings, is a countershaft, on which
Dear one end is a fast and loose pulley. This shaft also carries a pinion which gears
into a toothed wheel fixed on the shaft of a grinding roller with fixed bearings.
Immediately over this roller there is another roller, and in front of the latter there
is a further roller. On one side of the roller with fixed bearings there is also a roller,
and somewhat above the latter there is a fifth roller. All five grinding rollers are
preferably made of granite, but are not limited to that material. The relative
position of the rollers to each other is such that by the direction of the slots in the
frames containing the bearings, the first roller may be made to approach the second
more or less closely by horizontal adjustment screws, and the second roller may be
adjusted to the roller with fixed bearings by vertical screws.-The roller on one sido
of the roller having fixed bearings, may be adjusted to it by horizontal screws, and
the last or fifth roller may be set to the previous one by screws placed diagonally.
The adjustment of each roller to the next one can therefore be effected with the greatest
facility, while the bearings are easily accesible. The shafts of the various rollers are
furnished with wheels and pinions so proportioned and geared that each roller travels
at a speed of about one third, more or less, greater than the previous one, thus
ensuring a proper grinding action upon the material to bo dealt with.
Motion is imparted to the machine from some suitable power through the counter-
shaft, and the substances or compounds are fed to the first pair of rollers between
which they are ground. They then pass between the second and third, then between
the third and fourth, and finally between the fourth and fifth, from the latter of
which the ground material is delivered into a trough, shoot, or other conduit into a
suitable receptacle.
By this arrangement a most effective grinding machine is the result combining
all the advantages of two or more separate machines.
Dated this fih day of November 1888
W. H. BENNETT,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Machines for Grinding White Lead, Paint, Printing
Ink, and other similar Substances or Compounds.
I, HENRY CLARK of 18 Bear Lane, Southwark, in the County of Surrey, Engineer,
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 :-
The object of this invention is to combine in one machine a sufficient number of
grinding rollers to effectually grind whatever materials are presented to it without
the necessity of removing them to a funther grinding by a second machine, thus
effecting considerable economy in the machine itself and in the labour attending
its working.
In order that the invention may be easily understood drawings are attached
hereto, of which the following is a description. Fig. 1 is a sido elevation of the
machine with the gearing wheels on that side removed, and Fig. 2 is a right end
elevation of the machine and shows the gearing by which it is worked. In each of
the views similar letters refer to the same parts.
For the purpose of carrying out this invention I make a pair of strong, vertical,
and parallel metal frames A, A, and bolt them together by horizontal stays B. B,
furnished with shoulders, and with their extremities screwed so as to pass through
holes in the sides of the frames and be securely attached thereto by nuts C, C. Near
the centre of the lower part of the frame and parallel with the stays, mounted in
suitable bearings, is a countershaft D, on which near one end is a fast and looso
pulley E and F. This shaft also carries a pinion G which gears into a toothed
wheel fixed on the shaft of a grinding roller II with fixed bearings. Immediately
over this roller there is another roller I, and in front of the latter there is a further
roller J. On one side of the roller H with fixed bearings thero is also a roller K,
and somewhat above the latter there is a fifth roller L. All five grinding rollers
are preferably made of granite, but are not limited to that material. The relative
position of the rollers to each other is such that by the direction of the slots in the
frames containing the bearings, the first roller J may be made to approach the
second more or less closely by horizontal adjustment screws M, and the second
roller I may be adjusted to the roller H with fixed bearings by vertical screws N.
The roller K on one side of the roller H may be adjusted to it by horizontal screws O,
and the last or fifth roller L may be set to the previous one by screws P placed
diagonally. Tho adjustment of each roller to the next one can therefore be effected
with the greatest facility, while the bearings are easily accessible.
The shafts of the various rollers are furnished, as shown in the drawing, with
wheels and pinions so proportioned and geared that each roller travels at a speed of
about one third, more or less, greater than the previous one, thus ensuring a proper
grinding action upon the material to be dealt with. If however a greater or lesser
degree of rubbing or grinding action is required, then the wheels and pinions must
be proportioned accordingly.
Motion is imparted to the machine from some suitable power through the counter-
shaft, and the substances or compounds are fed to the first pair of rollers J and 1
between which they are ground, the materials being supplied to the rollers between
the two upright guides or guards X. They then pass between the second and third I
and H, then between the third and fourth H and K, and finally between the fourth
and fifth K and L, from the latter of which the ground material is delivered into a trough
or shoot, or other conduit Q which rocks upon centres R, R, and from thence into a
suitable receptacle. The edge of the trough or shoot being provided with a scraper S
which is adjusted by turning the screws T, T.
In Fig. 1 each of the roller bearings is marked U, and the shafts of the rollers V,
while W shows the slots in which the bearings are placed. A spiral spring a is

page_text: inserted between the frame and each of the bearings carrying the roller J, so as to
prevent injury to the rollers I and J should any hard substance accidentally get
between them.
By this arrangement a most effective grinding machine is the result, combining all
the advantages of two or more separate machines.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
Constructing grinding machines each having a frame, bearings, five rollers, and set
screws arranged as herein described and shown on the drawings, so that each roller
may be made to approach or recede from its fellow at the will of the attendant.
Dated this 27th day of July 1889.
W. H. BENNETT,
Agent for the Applicant.