IMPROVEMENTS IN ROTARY CUTTERS FOR CUTTING OK ORNAMENTING WOOD, BONE, IVORY, AND OTHER HARD SUBSTANCES
Year: 1875

page_text: LETTERS PATENT to William Clissold, of Cainscross, in the County
of Gloucester, Engineer, for the Invention of "IMPROVEMENTS IN
ROTARY CUTTERS FOR CUTTING OK ORNAMENTING WOOD, BONE, IVORY, AND
OTHER HARD SUBSTANCES."
Sealed the 22nd February 1876, and dated the 11th September 1875.
PROVISIONAL SPECIFICATION left by the said William Clissold at the
Office of the Commissioners of Patents, with his Petition, on the
11th September 1875.
I, WILLIAM CLISSOLD, of Cainscross, in the County of Gloucester,
Engineer, do hereby dcclare the nature of the said Invention for
"IMPROVEMENTS IN ROTARY CUTTERS FOR CUTTING OR ORNAMENTING WOOD, BONE,
IVORY, AND OTHER Hard SubstanCES," to be as follows:-
This Invention relates to an improved modo of forming the cutting
edges of rotary cutters, the object being to produce a cutter which will
make a clean smooth cut or indentation in the substance to be operated
upon, instead of the rough jagged cut produced by a circular or rotary

page_text: saw or rotary rasp in which the cutting teeth are made across or at
right angles or nearly so to the periphery of the cutter.
My improved cutters are made either of one single circular piece of
metal of suitable diameter and thickness, or they may be made-of-two-
discs placed side by side and secured close together so as to form one
cutting tool, but in all cases the cutting teeth are inclined from the
outer edge of the tool toward and across the centre line of the periphery.
The periphery of the tool before the teeth are cut therein may be either
or turned down to a V shaped
square, thus
edge, thus
"
or it may be rounded, thus ]
By varying the position or arrangement of the teeth as well as
altering the form of the periphery of the cutters as above shewn cuts of
various kinds may be made in the substance to be operated upon.
1
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Clissold in the Great Seal Patent Office
...on the 11th March 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
CLISSOLD, of Cains Cross, in the County of Gloucester, Engineer, send
greeting.
WHEREAS-Her-most-Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of September, in the year
of our Lord One thousand eight hundred and seventy-six, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said William Clissold, Her special
licence that I, the said William Clissold, my executors, administrators,
and assigns, or such others as I, the said William Clissold, 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,

page_text: the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN ROTARY CUTTERS FOR CUTTING AND ORNAMENTING WOOD, BONE, IVORY, AND
OTHER HARD SUBSTANCES," upon the condition (amongst others) that I, the
said William Clissold, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and scals, 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 William Clissold, 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 Drawing hereunto
annexed, and to the letters and figures marked thereon (that is to
say) :-
-
This Invention relates to an improved mode of forming the cutting
edges of rotary cutters, the object being to produce a cutter which will
make a clean smooth cut or indentation in the substance to be operated
upon, instead of the rough jagged cut produced by a circular or rotary
saw or rotary rasp in which the cutting teeth are made across or at
right angles or nearly so to the periphery of the cutter.
In the accompanying Drawing I have shewn three forms of rotary
cutter, from which it will be seen that my improved cutters are made
either of one single circular piece of metal of suitable diameter and
thickness, as shewn at Figures 1, 1ª, and 2, 2ª, or they may be made of
two discs placed side by side, as shewn at Figures 3 and 3ª, and secured
close together so as to form one cutting tool, but in all cases the cutting
teeth are inclined from the outer edges of the tool towards the centre of
the periphery. The periphery of the tool, before the teeth are cut
therein, may be either squarc, as shown at Fig. 1', or turned down to
a V shaped edge, as shown at Fig. 3", or it may be rounded, as shewn at
Fig. 2*, but in all cases the teeth must be set at an angle, as shown in
all the Figures.
By varying the position or arrangement of the teeth as well as altering
the form of the periphery of the cutter, as above shewn, cuts of various
kinds may be made in the substance to be operated upon and according
to the pattern intended to be produced.

page_text: It will be evident that by assembing together two, three, or more
discs having peripheries of different forms, mouldings and other
patterns may be cut by means of these improved rotary cutters.
Having now-described-my-Invention of "Improvements in Rotary
Cutters for Cutting and Ornamenting Wood, Bone, Ivory, and other
Hard Substances," and having explained the manner of carrying the
same into effect, I claim as the Invention secured to me by Letters
Patent as aforesaid,-
Forming rotary cutters of discs having peripheries of any suitable
section (according to the pattern desired to be produced), and having
cutting teeth inclined from the outer edges of the tool towards the
centre of the periphery, as and for the purpose herein set forth.
I also claim assembling together two or more discs (having cutting
peripheries prepared as described, and of any suitable section) and
securing them close together so as to form one cutting tool, as and for
the purpose herein set forth.
In witness whereof, I, the said William Olissold, have hereunto set
my hand and seal, the Eighth day of March, in the year of our
Lord One thousand eight hundred and seventy-six.
Signed, sealed, and delivered
by the above-named William
Clissold, in the presence of
SAMUEL PHIPPS,
Solicitor,
Cainscross.
WILLIAM CLISSOLD. (L.S.)