IMPROVEMENTS IN MACHINERY OR APPARATUS FOR FACING OR PLANEING STONE." PROAL SPATION
Year: 1875

page_text: LETTERS PATENT to Benjamin Josiah Brearley, of St. Helens, in the
County of Lancaster, Engineer, and George Henry Marsden, of
Holmfirth, in the County of York, Stone Merchant, for the
Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR FACING
OR PLANEING STONE."
PROVISIONAL SPECIFICATION left by the said Benjamin Josiah
Brearley and George Henry Marsden at the Office of the Com-
missioners of Patents, with their Petition, on the 2nd December
1875.
We, BENJAMIN JOSIAH BREARLEY, of St. Helens, in the County of
Lancaster, Engineer, and GEORGE HENRY MARSDEN, of Holmfirth, in
the County of York, Stone Merchant, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN MACHINERY OB APPARATUS FOR
FACING OR PLANEING STONE," to be as follows:-
The object of this Invention is to face or tool stone or to produce the
same appearance upon the face or surface of stone as would be produced

page_text: by hand in the process generally known as "tooling," by which stone is
faced with minute corrugations, also to produce a smooth surface like
planeing. To effect this we construct suitable framework upon which
we mount a table or bed to which a regular travelling or rectilinear
motion is given, and having also a return or reverse motion imparted by
suitable gearing or mechanical means. Upon this table the stone to be
tooled is fixed and carried thereby. Also on a cross shaft carried by the
framework of the machine we mount a number of eccentrics, each of
which gives a rising and falling motion to a slide head or tool box
carrying a chisel or tool, and this tool box being supported at a short
distance from the working end of the tool, the action of the eccentric
produces a slightly lateral motion of the point of the tool, so that the
said point or edge of the tool when in action describes an ellipse, and
this movement is found to produce the same effect on the stone as is
produced by hand labour.
The eccentrics can be so arranged or timed that only one tool or any
desired number of tools may act upon the stone at one time or
alternately in regular order. By a very slow movement of the table the
effect produced upon the surface of the stone is similar to that produced
by a planeing machine.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Benjamin Josiah Brearley and George Henry
Marsden in the Great Seal Patent Office on the 2nd June 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, BENJAMIN
JOSIAH BREARLEY, of St. Helens, in the County of Lancaster, Engineer,
and GEORGE HENRY MARSDEN, of Holmfirth, in the County of York,
Stone Merchant, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of December, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Benjamin Josiah Brearley and George
Henry Marsden, Her special licence that we, the said Benjamin Josiah
Brearley and George Henry Marsden, our executors, administrators, and

page_text: assigns, or such others as we, the said Benjamin Josiah Brearley and
George Henry Marsden, 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 "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR
FACING OR PLANEING STONE," upon the condition (amongst others) that
we, the said Benjamin Josiah Brearley and George Henry Marsden,
our executors or administrators, by an instrument in writing under
our; 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 we, the said Benjamin Josiah Brearley and
George Henry Marsden, do hereby declare the nature of our said In-
vention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement
and accompanying Sheet of Drawings, that is to say:-
This Invention relates to machinery for working, planeing, or facing
stone, and consists of a travelling bed or table upon which the stone is
placed, which bed or table has a reciprocatory movement imparted to it
by means of rack and pinion. The working or facing tools are mounted
upon eccentrics working on a shaft extending across the travelling bed.
The eccentrics are " timed so as not to strike the stone all at once, but
may either strike separately or two or more may strike together.
"
The accompanying Drawings represent sectional side and end
elevations of our machine.
} A is the reciprocating bed or table mounted upon the guide and
friction pullies B, which are fixed upon shafts C extending across and
underneath the bed. On this shaft is also a pinion D which takes into
the teeth of the rack E fixed underneath the bed, and causes the same
to reciprocate or travel to and fro underneath the row of "tools." F.
5 These "tools" are mounted on eccentrics G working on the shaft H
which is driven by pulley J. On the other end of this shaft is an
adjustable crank wheel K, which communicates intermittent motion by

page_text: friction clutch or catch to the grooved wheel L which imparts it to the
pinion D, and thus effects the travel of the bed or table in the working
direction, the return being effected by gear wheel N or other suitable
means. The height of the eccentric shaft and "tools".can be regulated
by the worm and worm wheels P and hand wheel Q; R is the rest or
fulcrum upon which the "tools work," and a are clips and nuts for
fastening the tools to the eccentric rods, so that they may be readily
removed for the purpose of sharpening. By using an upright shaft and
mounting eccentrics and "tools" thereon we may work the stone at the
sides as well as on the top. We may also arrange two sets of "tools" and
eccentrics and change gearing, so as to work the stone in both directions
of the reciprocatory movement. Or instead of two sets of tools and
eccentrics we may vary the angle of one set so as to perform both
operations.
Having thus described the nature of our said Invention and the
manner in which the same is to be performed, we would have it under-
stood that we do not confine ourselves to any particular construction,
arrangement, or manner of working the reciprocatory table or eccentrics,
but what we claim as our Invention is, the use of an eccentric or
eccentrics for operating the working tools in manner substantially as
herein shewn and described.
In witness whereof, I, the said George Henry Marsden, for and
on behalf of myself and the said Benjamin Josiah Brearley, have
hereunto set my hand and seal, this Thirtieth day of May, in
the year of our Lord One thousand eight hundred and seventy-
six.