IMPROVEMENTS IN GRINDING CEMENT AND OTHER SUB- STANCES, AND IN THE MACHINERY OR APPARATUS CONNECTED THEREWITH
Year: 1860

page_text: LETTERS PATENT to James Lark, of Strood, in the County of Kent, for
the Invention of "IMPROVEMENTS IN GRINDING CEMENT AND OTHER SUB-
STANCES, AND IN THE MACHINERY OR APPARATUS CONNECTED THEREWITH."
Sealed the 7th February, 1860, and dated the 14th August 1860.
PROVISIONAL SPECIFICATION left by the said James Lark at the
Office of the Commissioners of Patents, with his Petition, "on the 14th
August 1860.
:
I, JAMES LARK, of Strood, in the County of Kent, do hereby declare the
nature of the Invention for "IMPROVEMENTS IN GRINDING CEMENT AND OTHER
SUBSTANCES, AND IN THE MACHINERY OR APPARATUS CONNECTED THEREWITH," to be
as follows:-
This Invention has for its object improvements in grinding, and is applicable
to the grinding of cement and other substances. For this purpose I employ
horizontal millstones as is usual, and I drive the running stone in place of by
gearing as is usual, by forming a crank on the vertical shaft or spindle of the
stone, and connecting the same with a horizontal steam cylinder, which is
mounted on a bed plate, and fitted with valves and other parts as is usual,
and where several such mills are employed I arrange them side by side, and
so construct the bed of the steam engine that it may traverse on rails or guides.
in front of the several mills in order that the engine may be transferred from

page_text: :
mill to mill, the connecting rod and excentric strap being taken off the
spindle of the mill which is to be put out of work, and when the engine is
'moved attached to the spindle of another mill to be ready at once to drive the
I mount a 'fly wheel on the spindle of each of the mills if they are
required to do heavy work. Also, when edge runners are employed, I drive
'the same by a crank on the vertical axis of each pair of runners, and I
arrange the engine so that it may be transferred from one set to another as
above described.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Lark in the Great Seal Patent Office on the
14th February 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
LARK, of Strood, in the County of Kent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her. Letters
Patent, -bearing date the Fourteenth day of August, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said James Lark, Her special licence that I, the said James Lark,
my executors, administrators, and assigns, or such others as I, the said
James Lark, 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
GRINDING CEMENT AND OTHER SUBSTANCES, AND IN THE MACHINERY OR APPARATUS
CONNECTED THEREWITH," upon the condition (amongst others) that I, the said
James Lark, 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 calendar-months next and immediately after the
date of the said Letters Patent.
NOW KNOW.YE, that I, the said James Lark, do hereby declare the
nature of the said Invention, and in what. manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:-

page_text: to another pair of stones the holding-down bolts m, m, are slacked or removed,
and the connecting and excentric rods uncoupled, then by applying a crank
handle to the end of the axis p and turning the same, the engine bed will be
traversed along the guides 1,-1, the pinion's q, q, on the axis p, gearing with the
racks on the frame k. When it has arrived opposite another pair of stones,
the bed. is again bolted down, and the connecting and excentric rods are
coupled up to the crank and excentric on the upright shaft of these stones.
The supply of steam is maintained either by jointed pipes, or by introducing
or taking out lengths as may be required. It will be evident that the frame a
may be made circular in place of straight, and the several pairs of stones
arranged round in a circle, 'the engine being then mounted on a turntable in
the centre. This arrangement is idêntical in principle to that above described.
Figure 2, shows an arrangement in which the engine is mounted on wheels,
so that it may be coupled with a mill placed in any position, the mill shaft as
before having the crank and excentric upon it. When this arrangement is
employed, the engine and mill should both be firmly-fixed. when at work.
Figure 3 shows partly in section a pair of edge runners arranged to have
an engine coupled with them as, before described. r is a vertical shaft having
a crank and excentric on-it as before; it is carried at its lower end in a step on
a suitable support, and above by a bearing s. The axis has a boss on it,
through which the axis t of the edge runners u passes; vis the pan in which
the stones work. The several sets of stones are arranged one by the side of
the other as already described in respect to Figure 1, and the engine traverses,
or it may be rotates-in front of them in a similar manner.
In witness whereof, I, the said James Lark, have hereunto set my hand
and seal, this Twelfth day of February, in the year of our Lord One
thousand eight hundred and sixty-one.
TASTE TADI G