IMPROVED MACHINERY FOR DRESSING MILL- STONES
Year: 1865

page_text: LETTERS PATENT to Alfred Vincent Newton, of the Office for Patents,
66, Chancery Lane, in the County of Middlesex, Mechanical Draughts-
man, for the Invention of "IMPROVED MACHINERY FOR DRESSING MILL-
STONES." A communication from abroad by Eleazer A. Paine, of
Monmouth, Warren County, State of Illinois, United States of America.
Sealed the 27th March 1866, and dated the 1st November 1865.
PROVISIONAL SPECIFICATION left by the said Alfred Vincent Newton
at the Office of the Commissioners of Patents, with his Petition, on
the 1st November 1865.
I, ALFRED VINCENT NEWTON, of the Office for Patents, 66, Chancery Lane,
in the County of Middlesex, Mechanical Draughtsman, do hereby declare the
nature of the said Invention for "IMPROVED MACHINERY FOR DRESSING MILL-
STONES," to be as follows:
This improved machine for dressing millstones is designed to supersede the
complicated machines hitherto devised for that purpose, and to perform the
work more rapidly and in a more perfect manner than it can possibly be done
by the old hand process. The Invention consists in arranging a carriage on
an adjustable frame with a rack-gearing and pick-driving mechanism in
such a manner that by turning of a single shaft the pick will be operated
and fed along to its work, an arbitrary or positive movement being given
the pick, so that the same will cut an uniform depth, but be capable of being
graduated or set to cut to a greater or less depth, as may be required.
Mounted upon a cast-iron bed is a horizontal frame, which is fitted with a
rack that extends from one end to the other of the frame and is capable of

page_text: being moved by means of a traversing screw transversely of the bed. This
horizontal frame supports a carriage, on the end of which is mounted &
vertical sliding frame which carries an adjustable pendent bar. To the end
of this bar a picker is secured by a clamping screw. The carriage serves to
support a horizontal driving shaft, which by gearing drives another shaft fitted
at one end with a crank pin. This pin is connected to a slide which fits into
a groove cut in the face of the sliding picker frame. As, therefore, rotary
motion is given to the driving shaft, the picker frame will be caused to rise
and fall, and thus cause the picker to operate upon the millstone placed
beneath it. To enable the picker to follow the line of the grooves which it
is required to dress the traverse of the carriage receives a traverse motion
longitudinally of the bed; this is obtained by a wheel mounted on the
carriage and driven from a pinion on the driving shaft gearing into the rack
before mentioned on the horizontal frame. For shifting the picker from one
groove to another it is only necessary to turn the traversing screw of the
horizontal frame.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Alfred Vincent Newton in the Great Seal Patent Office
on the 1st May 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALFRED
VINCENT NEWTON, of the Office for Patents, 66, Chancery Lane, in the County
of Middlesex, Mechanical Draughtsman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the First day of November, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-ninth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Alfred Vincent Newton, Her special licence that I, the said Alfred
Vincent Newton, my executors, administrators, and assigns, or such others as
I, the said Alfred Vincent Newton, 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 "Im-
PROVED MACHINERY FOR DRESSING MILLSTONES," being a communication to me
from abroad, upon the condition (amongst others) that I, the said Alfred Vincent
Newton, my executors or administrators, by an instrument in writing under
my, or their, or one of their hands and seals, should particularly describe

page_text: 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 Alfred Vincent Newton, do hereby
declare the nature of the 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 Drawing hereunto annexed,
and to the letters and figures marked thereon (that is to say):-
This Invention relates to a new and improved machine for dressing mill-
stones, and is designed to supersede the complicated machines hitherto
devised for that purpose, and still perform the work more rapidly and in a
more perfect manner than it can possibly be done by the old hand process.
The Invention consists in arranging a carriage or an adjustable frame with
a rack-gearing and pick-driving mechanism in such a manner that by the
turning of a single shaft the pick will be operated and fed along to its work,
an arbitrary or positive movement being given to the pick, so that the same
will cut: an uniform depth, but be capable of being graduated or set to cut to
a greater or less depth, as may be required.
In the accompanying Drawing, Fig. 1 is a front elevation of the improved
machine; Fig. 2 is a plan or top view of the same; and Fig. 3 is a trans-
verse vertical. section of the same, taken in the line x, x, Fig. 2. Similar
letters. of reference. indicate corresponding parts in all the Figures.
A represents what may be termed the. base of the machine, which is a
rectangular block, having a dovetail rebate a in each end of it at its upper
part to receive corresponding dovetail cleats or projections b, b, at each end
of a rectangular frame or box B, which is fitted on A to hold B in proper
position on A, and admit of the former sliding freely forward and backward
on the latter. This movement or adjustment of B is effected by means of a
screw C, which passes through a nut or female thread in the rear side of B,
and has its bearing in an arm D on the base of the machine (see Figure 3.)
On the upper part of the rectangular frame B there is placed a carriage E,
the latter being provided at its base with dovetail cleats c, c, to fit in dovetail
rebates d, d, at the front and rear side of the frame B, which cleats and
rebates serve as guides for the carriage E as it moves over the frame B.
In the upper part of this frame there is fixed longitudinally and centrally &
rack F, and into the rack gears an intermediate wheel H mounted on the
carriage E. This wheel H is driven by a pinion e keyed to a driving shaft G,
having its bearings in the carriage E. In one end of the carriage E there

page_text: is fitted a vertical silding frame I for sustaining and. imparting an up-and-down:
motion to the pick or dressing tool. In the upper part of this frame and
on its inner face there is a horizontal groove f made to receive a slide 9, and
this slide has attached to it the wrist pin h of a crank pulley J. The crank
pulley is keyed to the end of a shaft K in the upper part of the carriage, which
shaft is fitted with a fly wheel L and a pinion M; this pinion M gears into
and receives motion from a spur wheel N keyed on the shaft G before.
mentioned. By this arrangement therefore both the travelling movement of
the carriage and the up-and-down movement of the sliding frame I are obtained
from the rotation of the shaft G. In the sliding frame I there is fitted a
vertical bar O, to the lower end of which the pick Q is attached. This bar O
is free to slide up and down, and is adjusted in that direction by means of a
Screw P.
: From the above description it will be seen that the pick is operated in
consequence of being attached to the sliding frame I, and the depth of the
cut of the pick may be regulated by adjusting the bar O higher or lower.
In using the device the front edge of the base A is placed in line with the
furrow to be dressed and the shaft G turned, which operates the pick and
also moves the carriage and feeds the pick along either to the right or left
according to the direction in which the shaft G is turned, the pick being
adjusted further forward or backward, so as to cut in parallel lines by
adjusting the frame or box B through the medium of the screw C.
Having now set forth the nature of the Invention of "Improved Machinery
for Dressing Millstones," as communicated to me from abroad, and explained
the manner of carrying the same into effect, I wish it to be understood
that under the above in part recited Letters Patent I claim the means
above described for adjusting and operating the picks or tools used in dressing
millstones.
In witness whereof, I, the said Alfred Vincent Newton, have hereunto
set my hand and seal, the First day of May, in the year of our Lord
One thousand eight hundred and sixty-six.
Witness,
J. W. MOFFATT,
66, Chancery Lane.
A. V. NEWTON. (L.B.)