IMPROVEMENTS IN AND CONNECTED WITH APPARATUS FOR SURFACING MILL AND OTHER STONES." CONNECTED WITH APPARATUS FOR AND
Year: 1873

page_text: LETTERS PATENT to Henry Beaufort Sears, of Liverpool, in the County
of Lancaster, Merchant, for the Invention of "IMPROVEMENTS IN AND
CONNECTED WITH APPARATUS FOR SURFACING MILL AND OTHER STONES."
CONNECTED WITH APPARATUS FOR SURFACING MILL AND OTHER STONES."
Scaled the 10th June 1873, and dated the 29th January 1873.
PROVISIONAL SPECIFICATION left by the said Henry Beaufort Sears
at the Office of the Commissioners of Patents, with his Petition, on
the 20th January 1873.
I, HENRY BEAUFORT SEARS, of Liverpool, in the County of Lancaster,
5 Merchant, do hereby declare the nature of the said Invention for. "Im-
PROVEMENTS IN ANnd Connected witH APPARATUS FOr Surfacing Mill and other
STONES," (to be as follows:-
My Invention relates to that class of apparatus for surfacing or
dressing stones in which hard mineral substances, hereafter for brevity
called diamonds, are employed, such diamonds being caused to attack

page_text: the stone, whether millstone for shelling or cleaning cercals, ordinary
millstone before furrowing, or the curved or flat faces of stones to be
used for building or other purposes or operations, by an abrading and
ploughing action, and consists-
the one
First. As means for leaving the face of a stone or stones after being
acted upon smooth and of the required configuration I employ a series
(more than one may be used) of two or more, usually four, eight, or ten
diamonds secured in a holder of any desired kind, but adjustable as
regards their depth, and disposed at such distances apart that no
following diamond shall run in the same groove or cut as
preceding it, but shall act in the ridge left between the cuts. The said
series of diamonds, which by preference are set the one in advance of
the other when at work, arc secured in a carrier caused to move on a
slide in straight, curved, spiral, or other lines. When used for surfacing
runner stones employed in cleaning or shelling cereals, for which
purpose I find them admirably well suited, I prefer to cause them to
move in convolute lines from the skirt to the eye, employing a slide for
the diamond carrier of the form which it is desired the face of the said
stones should possess. In all cases the outline of the horizontal surface
of the slide on which the diamond carrier is moved will be imparted to
the stone or stones acted upon.
Second. As means tending to prevent the diamonds from being
crushed or broken, and for ensuring truc surfacing at one operation when
a series of diamonds, as described, under the above first head is used, I
place or adjust the diamonds at increasing depths as regards the cut they
are to make; thus the leading diamond is not set so deep as the one
following it, nor the second so deep as the third, and so onwards.
Third. As means for economically and more truly surfacing millstones
before furrowing, runner stones for shelling or cleaning cereals, and stones
generally, whether to be provided with a curved or flat surface when the
abraded series of diamonds above described are caused to move holically
or in convolute lines, I have devised the novel apparatus now to bo
described. This consists essentially of one, two, or more slides secured
to and caused to rotate with a free ended shaft supported on strong
framework, and driven by convenient power through any reliable dis-
engaging gear, a diamond tool carrier is caused to move automatically

page_text: on cach of the said slides when the apparatus is at work by a cord
operated from the shaft and a cord tightening pulley whose axis is
moved in or on a circular guide. The rate of feed is proportioned, as
will be evident, to the distance between the diamonds. The stone or
stones to be surfaced is or are placed underneath or opposite to the slides
and diamond tools on frames which admit of easy levelling or truing.
To give the diamonds the same travelling speed over the whole surface
of the stone at the eye or centre as well as at the skirt or circumference,
two speed cones are employed, a feed screw being applied to move the
belt on the said cones.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said Henry Beaufort Scars in the Great Seal Patent
Office on the 29th July 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
BEAUFORT SEARS, of Liverpool, in the County of Lancaster, Merchant,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of January, in the year of
our Lord One thousand eight hundred and seventy-three, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Henry Beaufort Sears, Her special
licence that I, the said Henry Beaufort Sears, my executors, adminis-
trators, and assigns, or such others as I, the said Henry Beaufort
Scars, my exccutors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 AND CONNECTED WITH APPARATUS FOR SURFACING MILL
AND OTHER STONEs,” upon the condition (amongst others) that I, the said
Henry Beaufort Sears, my executors or administrators, by an instrument
in writing under my, or their, or one of their lands 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

page_text: 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 Henry Beaufort Sears, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying
Sheet of illustrative Drawings, and to the letters and figures marked
thereon, that is to say :-
My Invention relates to that class of apparatus for surfacing or
dressing stones in which hard mineral substances, hereafter for brevity
called diamonds, are employed, such diamonds being caused to attack
the stone, whether millstone for shelling or cleaning cereals, ordinary
millstone before furrowing, or the curved or flat faces of stones to be
used for building or other purposes or operations, by an abrading or
ploughing action, and consists:-
First. As means for leaving the face of a stone or stones after being
acted upon smooth, and of the required configuration, I employ a series
(more than one may be used) of two or more, usually four, eight, or ten
diamonds secured in a holder of any desired kind, but adjustable as
regards their depth, and disposed, at such distances apart that no
following diamond shall run in the same groove or cut as the one
preceding it, but shall act in the ridge left between the cuts. The said
series of diamonds, which by preference are set the one in advance of the
other when at work are secured in a carrier caused to move on a slide in
straight, curved, spiral, or other lines. When used for surfacing runner
stones employed in cleaning or shelling cereals, for which purpose I find
them admirably well suited, I prefer to cause them to move in convolute
lines from the skirt to the cyc, employing a slide for the diamond carrier
of the form which it is desired the face of the said stones should possess.
In all cases the outline of the horizontal surface of the slide on which
the diamond carrier is moved will be imparted to the stone or stones
acted upon.
Second. As means tending to prevent the diamonds from being
crushed or broken, and for ensuring truc surfacing at one operation
when a series of diamonds, as described under the above first head is;
used, I place or adjust the diamonds at increasing depths as regards the

page_text: cut they are to make, thus the leading diamond is not set so deep as the
one following it, nor the second so deep as the third, and so onwards.
Third. As means for economically and more truly surfacing millstones
before furrowing, runner stones for shelling or cleaning cereals, and
stones generally, whether to be provided with a curved or flat surface,
when the abrading series of diamonds, above described, are caused to
move helically or in convolute lines I have devised the novel apparatus
now to be described. This consists essentially of one, two, or more
slides secured to and caused to rotate with a free ended shaft supported
on strong framework and driven by convenient power through any
reliable disengaging gear. A diamond tool carrier is caused to move
automatically on each of the said slides when the apparatus is at work
by a cord operated from the shaft, and a cord tightening pulley whose
axis is moved in or on a circular guide. The rate of feed is proportioned
as will be evident to the distance between the diamonds. The stone or
stones to be surfaced is or are placed underneath or opposite to the
slides, and diamond tools on frames which admit of easy levelling or
truing. To give the diamonds the same travelling speed over the whole
surface of the stone at the cyc or centre as well as at the skirt or
circumference, two speed cones are employed, a feed screw being applied
to move the bolt on the said cones

page_text: at the will of the attendant be caused to rotate with the shaft gi
j, toothed wheel secured on the vertical free ended slide carrying shaft k,
and geared with the pinion h; l, slides here curved so as to cause the
diamonds to act uniformly on the curved surface of the runner stone L,
shown in position. Screws jacks are shown as convenient means of i
levelling the stone L. m, tool carrier, provided with rollers to allow
said carrier to pass easily over the curved portions of 1; the upper roller n
is adjustable. When straight slides are employed the rollers n may be
dispensed with; o, diamond holder secured to a projecting piece on the
carrier m by a set screw, as shown. The diamonds which are arranged
as herein-before mentioned at varying depths, and so that they do
not cut in the same groove are vertically adjustable by the hand
scrow and sliding picce p. To cause the tool carriers, holdors, and
diamonds to move as a whole from the skirt to the eye the endless cord
or band and the rotating screws are employed. The cord or band
is passed over the circular stationary piece 8 and the pullics ; pulley '
being adjustable for tightening the cord by the quadrant. The end
pullies are secured on the screw r. During rotation of the slides
the cord or band causes the end pullies and the screws to rotate, and
thereby move the tool carriers inwards at the required speed.
maintain uniform travelling speed of the diamonds over the face of the
stone the band e is caused to move downwards on the conc d and ƒ by
the screw #, sliding fork v, wheel w, and band x, the latter being driven
from the centre free onded slide carrying shaft k. When the band e has
reached the bottom of the cones it can be moved quickly to the top by
disengaging the clutch i and uncoupling the fork u; in this way the
cones are allowed to revolve without giving motion to the shaft k, and
the fork and band are casily pushed up.
To
It will be obvious that instead of pushing up the fork and band &
the motion of the screw u may be reversed so as to cause the machine
to act on the stone from the eye to the skirt.
It will also be obvious that instead of giving a continuous inwards or
outwards travel to the attacking tools, such tool may be caused to move
intermittently.
Having now described the nature of my said Invention and par-
ticularized the same by details which answer well in practice, I claim

page_text: the improvements in and connected with apparatus for surfacing mill
and other stones, substantially as hercin described.
In witness whereof, I, the said Henry Beaufort Scars, havo here-
unto set my hand and seal, the Twenty-sixth day of July in
the year of our Lord One thousand eight hundred and seventy-
three.
In the presence of
J. T. KING,
Patent Agent,
Liverpool.
HENRY BEAUFORT SEARS. (L.S.)