IMPROVEMENTS IN MACHINERY FOR GRINDING AND POLISHING ALL KINDS OF SAWS, FILES, OR OTHER FLAT METAL SURFACES
Year: 1874

page_text: LETTERS PATENT to Joseph Wilde, of Hadfield Street, Walkley,
Sheffield, Manager of Saw Manufactory, for the Invention of
"IMPROVEMENTS IN MACHINERY FOR GRINDING AND POLISHING ALL KINDS OF
SAWS, FILES, OR OTHER FLAT METAL SURFACES."
PROVISIONAL SPECIFICATION left by the said Joseph Wilde at the
Office of the Commissioners of Patents, with his Petition, on the
27th January 1874.
I, JOSEPH WILDE, of Hadfield Street, Walkley, Sheffield, Manager of
Saw Manufactory, do hereby declare the nature of my said Invention
for "IMPROVEMENTS IN MACHINERY FOR GRINDING AND POLISHING ALL KINDS OF
SAWS, FILES, OR OTHER FLAT METAL SURFACES," to be as follows:-
:-
The Invention is designed for the purpose of enabling the process of
grinding or polishing saws, files, or other flat metallic articles to be
accomplished with facility and accuracy by a novel arrangement of
mechanism in connection with the grinding stones or polishing wheels
which may thus be described.

page_text: The two grinding stones or polishing wheels between the peripheries
of which the articles to be ground or polished are passed are mounted in
suitable framing so as to assume either a vertical or horizontal position,
but for the purpose of this description I will take the vertical arrange-
ment in which one of the stones or wheels is mounted in sliding bearings
over the other.
These bearings are connected by a suitable arrangement of gearing
with screws or their equivalent through the medium of which the
distance between the peripheries of the stones or wheels is adjusted with
precision according to the thickness of the metallic articles submitted
to their action.
The grinding stones or polishing wheels when in action are driven
both in one direction by connecting gearing straps or other equivalent
so that the articles submitted to their action whilst being passed
between them are simultaneously ground on both sides in reverse
directions, that is, the frictional contact on one side will be in a forward,
and that on the other in a backward direction. The speed of the two
being equal the counter action thus produced will give a balance of
motion to the saw, file, or other flat metallic articles submitted to their
action.
In order, therefore, to give the necessary traverse or motion to such
articles whilst being ground they are passed between two pairs of
feeding guide rollers, which are independently driven at different rates
of speed to the grinding wheels.
Each pair of rollers is supported in adjustable bearings in a position
which will allow one pair to be placed immediately before, and the other
behind or at the back of the grinding surfaces of contact of the stones or
wheels aforesaid. Thus when the grinding or polishing wheels have
been adjusted with respect to their distances apart in accordance with
the articles to be ground the machine is set in motion and each article is
placed between the upper revolving feed rollers which continuously
carry it forwards so as to pass it between the surfaces of the grinding or
polishing wheels until taken hold of by the back pair of rollers, which
finally withdraws the article and presents it free from the machine
ground or polished (according to the nature of the process it has been
submitted to) on both its sides.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Wilde in the Great Seal Patent Office on
the 27th July 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
WILDE, of Hadfield Street, Walkley, Sheffield, Manager of Saw Manu-
factory, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of January, in
the year of 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 me, the said Joseph Wilde,
Her special licence. that I, the said Joseph Wilde, my executors,
administrators, and assigns, or such others as I, the said Joseph
Wilde, my executors, 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 In-
vention for "IMPROVEMENTS IN MACHINERY FOR GRINDING AND POLISHING ALL
KINDS OF SAWS, FILES, OR OTHER FLAT METAL SURFACES," upon the condition
(amongst others) that I, the said Joseph Wilde, 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 Joseph Wilde, 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, and accompanying Drawing, that is to say:-
The Invention is designed for the purpose of enabling the process of
grinding or polishing saws, files, or other flat metallic articles to be
accomplished with facility and accuracy by a novel arrangement of
mechanism in connection with the grinding stones or polishing wheels
which may be thus described.

page_text: The two grinding stones or polishing wheels between the peripheries
of which the articles to be ground or polished are passed are mounted
in suitable framing so as to assume either a vertical or horizontal position,
but for the purpose of this description I will take the vertical arrange-
ment in which one of the stones or wheels is mounted in sliding bearings
over the other.
These bearings are connected by a suitable arrangement of gearing
with screws or their equivalent, through the medium of which the
distance between the peripheries of the stones or wheels is adjusted with
precision according to the thickness of the metallic articles submitted
to their action.
The grinding stones or polishing wheels when in action are driven
both in one direction by connecting gearing straps or other equivalent
so that the articles submitted to their action, whilst being passed
between them are simultaneously ground on both sides in reverse
directions, that is the frictional contact on one side will be in a forward,
and that on the other in a backward direction.
In order, therefor, to give the necessary traverse or motion to such
articles whilst being ground they are passed between two pairs of feeding
guide rollers, which are independently driven at different rates of speed
to the grinding wheels.
In order that the Invention may be better understood and explained
in detail I have hereunto annexed a Drawing made on a scale of about
one inch to the foot, letters of reference being marked thereupon.
DESCRIPTION OF THE DRAWING.
Fig. 1 represents an elevation of a vertical grinding and polishing
machine made according to my Invention, and is shewn as one arrange-
ment of the same. In this Figure a, a, is the framing of the machine,
in which are mounted on suitable bearings the grinding stones or polish-
ing wheels b, b. The top stone or wheel 6' is mounted in sliding bearings
which are actuated to move or slide simultaniously on the framing
a, by the hand wheel d, through the medium of the bevil mitre wheels
e, e, and screws f. f. When turning the hand wheel d motion is com-
municated through the worm f¹ and worm wheel g to the bevil mitre
wheels and vertical screws before mentioned, the action of which,
according to the direction in which such hand wheel is turned, will
C, C,

page_text: cause the stones or wheels b, 61, to extend or contract their distances
apart in a manner that will enable the space between their peripheries
to be adjusted with precision, according to the thickness of the metallic
articles submitted to their action.
b
The grinding stones or polishing wheels b, b, are driven both in one
direction by the pulley h and gearing i, i, so that the articles passed
between them are simultaneously ground on both sides in reverse
directions. The speed of the stones being equal the counteraction thus
produced will give a balance of motion to the saw blade, file, or other
flat metallic article submitted to their action.
The articles to be ground or polished are inserted between the feeding
guide rollers k, k, which are independently driven at different rates of
speed to that of the grinding stones b, b¹, by the pulley and mitre
bevel wheels m, m. Each pair of rollers is supported in adjustable
bearings n, n, in a position which will allow one pair to be placed
immediately before, and the other behind or at the back of the grinding
surfaces of contact of the stones.
Thus when the grinding or polishing wheels have been adjusted with
respect to their distances apart in accordance with the articles to be
ground the machine is set in motion, and each article as placed between
the upper revolving feed rollers k, k, is continuously carried forward
and passed between the surfaces of the grinding or polishing wheels
b, b¹, until taken hold of by the second or back pair of rollers, which
finally withdraws the article and presents it free from the machine
ground or polished (according to the nature or process it has been
submitted to) on both its sides.
I would remark in conclusion that although I have shewn the Inven-
tion as applied to stones or wheels placed vertically, the same arrange-
ment of parts is equally applicable where the stones or wheels are placed
horizontally, and which would be their preferable position when grinding
circular and large oblong saws or similar articles, but for small work
and polishing the vertical arrangement would generally be employed.
Having now described the nature of my said Invention, together with
the method of carrying the same into practical effect, I wish it to be
distinctly understood in conclusion that I claim, the novel arrangement,
disposition, and driving of adjustable grinding stones or polishing wheels
whether placed in a vertical or horizontal position to be used in the

page_text: manner and for the purpose, as herein-before substantially described
and set forth, one example and arrangement of which is fully illustrated
in the Drawing annexed.
In witness whereof, I, the said Joseph Wilde, have hereunto set
my hand and seal, this Thirteenth day of July, in the year of t
our Lord One thousand eight hundred and seventy-four.
Witness,
C. H. JOHNSON,
7, St. James' Row,
Sheffield.
JOSEPH WILDE. (L.S.)