CERTAIN IMPROVEMENTS APPLICABLE TO MORTAR MILLS, OR TO U AT " PROVISIONAL SPECIFICATION
Year: 1874

page_text: LETTERS PATENT to John Campbell, of London, in the County of
Middlesex, Iron Merchant, and Wallace Cochrane Somerville, of
Clapham, in the County of Surrey, Civil Engineer, for the Inven-
tion of "
CERTAIN IMPROVEMENTS APPLICABLE TO MORTAR MILLS, OR TO
U
AT
"
PROVISIONAL SPECIFICATION left by the said John Campbell and
Wallace Cochrane Sommerville at the Office of the Commissioners
of Patents, with their Petition, on the 12th February 1874..
WC, JOHN CAMPBELL, of London, in the County of Middlesex, Iron
Merchant, and WALLACE COCHRANE SOMERVILLE, of Clapham, in the
County of Surrey, Civil Engineer, do hereby declare the nature of the
said Invention for "CERTAIN IMPROVEMENTS APPLICABLE TO MORTAR MILLS, OR
TO OTHER GRINDING MILLS OF A SIMILAR NATURE, AND TO ROAD ROLLERS," to be
as follows:-
This Invention relates to certain improvements which are specially
applicable to mortar mills, or to loam mills, or to other mills for

page_text: grinding, in which edge runners are used and to road rollers; the object
being to cause the runners or rollers or the parts thereof to work inde-
pendently of each other.
In carrying our Invention into practice we mount each runner or roller
or each part thereof on a separate centre (provided if desired with friction
wheels) around which it rotates, but these centres we prevent having
movement therewith, and we apply them so as to be capable of move-
ment in a vertical direction only by forming them hollow, and con-
tracting, shaping, or forming their ends with an elongated vertical flat
sided slot through which we pass a fixed cross squared shaft fitting the
slots crossways, and connected at each end to a low side standard. We
thus allow each centre and its runner or roller, or part thereof, to have
an independent motion (instead of all working round a single fixed
turned cross shaft as hitherto) in a vertical direction, so that it can rise
and fall and adapt itself to any obstruction or inequalities in the sub-
stance of the material upon which it operates.
The centres may be provided with exterior flanges to exclude dirt or
other extraneous matter from the bearings.
The application of these improvements to machinery of the class
referred to renders the construction thereof much more simple than
hitherto; for example, in a mortar mill the fixed squared shaft (serving
as a cross head or stay between the side standards of the mill) dispenses
with the upper part of the mill framing and with the upper cross head
and also with the side struts of the framing.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 2
filed by the said John Campbell and Wallace Cochrane Somerville in
the Great Seal Patent Office on the 12th August 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wc, JOHN
CAMPBELL, of London, in the County of Middlesex, Iron Merchant, and
WALLACE COCHRANE SOMERVILLE, of Clapham, in the County of Surrey,
Civil Engineer, send greeting.

page_text: our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said John Campbell and Wallace Cochrane
Somerville, Her special licence that we, the said John Campbell and
Wallace Cochrane Somerville, our executors, administrators, and assigns,
or such others as we, the said John Campbell and Wallace Cochrane
Somerville, our 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
"CERTAIN IMPROVEMENTS APPLICABLE TO MORTAR MILLS, OR TO OTHER GRINDING
MILLS OF A SIMILAR NATURE, AND TO ROAD ROLLERS," upon the condition
(amongst others) that we, the said John Campbell and Wallace
Cochrane Somerville, our executors or administrators, by an instru-
ment in writing under our, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Inven-
tion, 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 we, the said John Campbell and Wallace
Cochrane Somerville, do hereby declare the nature of our said Invention,
and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement in writing,
and on reference being had to the accompanying Drawings, that is to
say:―
This Invention which is illustrated on the accompanying Drawings in
Figures 1 to 5, relates to certain improvements which are specially
applicable to mortar mills, or to loam mills, or to other mills for
grinding, in which edge runners are used, and to road rollers; the object
of the Invention being to cause the runners or rollers or the parts
thereof to work independently of each other.
In carrying our Invention into practice we mount each runner or
roller 1 or each part thereof, when two or more are used together, as
shown in Figure 1, on a separate centre 2 (provided if desired with
friction wheels) around which it rotates, but these centres we prevent
having movement therewith, and we apply them so as to be capable of

page_text: movement is a vertical direction only by forming them hollow (see
Figures 2 and 3) and contracting, shaping, or forming each of their ends
with an elongated vertical flat sided slot 3 (see Figures 3 and 4) through
which we pass a fixed cross squared shaft 4 (fitting the slots crossways)
connected at each of its ends to a low side standard 5 by bolts 6 as
shown. We thus allow each centre 2 and its runner or roller 1 or part
thereof, to have an independent motion (instead of all only working
round a single fixed turned cross shaft as hitherto) in a vertical direc-
tion, so that if need be it can rise and fall and adapt itself to any
obstruction or inequalities in the substance of the material upon which
it operates (see Figure 1).
The centres 2 may be provided with exterior flanges 7 to exclude dirt
or other extraneous matter from the bearings and which may be formed
therewith or secured thereto by screw bolts 8, see Figures 2 and 3.
The application of the above described improvements to machinery of:
the class referred to renders the construction thereof much more simple
than hitherto, as shown in the example of the mortar mill (illustrated in
Figures 1 and 5); the fixed square shaft 4 (serving as a cross head or
stay between the side standards 5 of the mill) dispenses with the usual
upper part of the mill framing and with the usual upper cross head, a
and also with the usual side struts, of the said framing.
Having now particularly described and ascertained the nature and
object of our said Invention, together with the manner in which the
same is to be or may be performed or carried into practical effect, we
would remark in conclusion that we claim as our Invention the above ?
described improvements, substantially as described and as illustrated on
the accompanying Drawings, or any mere modification thereof.
In witness whereof, we, the said John Campbell and Wallace
Cochrane Somerville, have hereunto set our hands and seals, this
Fourth day of August in the year of our Lord One thousand eight g
hundred and seventy-four.
JOHN CAMPBELL.
(L.S.)
W. C. SOMERVILLE. (L.S.)