Improvements in Wheel Cutting Tools.
Year: 1891

page_text: Date of Application, 11th Sept., 1891
Complete Specification Left, 9th June, 1892-Accepted, 9th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in Wheel Cutting Tools.
I, JOHN WHITTAKER, of Globe Works, Accrington, in the County of
Lancaster, Iron Turner, do hereby declare the nature of this invention to be as
follows:-
This invention relates, to tools for cutting teeth, in the wheels of metal,
and is designed, to cut and form, two or more teeth, to, a completed form, at.one
operation.
According to this my said invention, I first construct a master tool, or master
cutter, from a piece of steel, on the edge of which I set out the teeth, and spaces,
to.the pitch-radius, and size of teeth required.in the wheels to be cut. The teeth
ou the master tool;or: master cutter,.are radia to a centre, equal to the diameter of
the required wheels.
The master cutter, is now to be employed, in cutting and preparing the revolving
cutter, which is used for cutting the blanks into wheels, and such revolving cutter,
consists either of one broad edged. disc, or two or more discs of steel in the
periphery or peripheries of which (by use of the master tool) is cut and formed,
teeth and spaces, such as the wheels are to be cut to.
As the teeth of, the master tool as stated, are radia, it follows that the teeth
and spaces in the periphery of the revolving cutter or cutters, are also radia,.and
that two or more of such teeth can bear and operate upon the edge or periphery
of the blank, from which the wheel is to be formed, and that two or more com-
pleted teeth may be cut or formed at each setting of the blank from which the
wheel is being cut.
"Dated this 7th day of September 1891.
WALTER BRIERLEY,
Bank Chambers, Waterhouse Street, Halifax, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Wheel Cutting Tools.
I, JOHN WHITTAKER, of Globe Works, Accrington, in the County of
Lancaster, Iron Turner, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :—
This invention relates, to tools for cutting teeth in the wheels of metal, and
is designed, to cut and form, two or more teeth, to a completed form, at one
operation.
According to this my said invention I first construct a master tool, or master
cutter, from a piece of steel, on the edge of which I set out the teeth, and spaces,
to the pitch-radius, and size of teeth required in the wheels to be cut.
The teeth on the master tool or master cutter, are radia to a centre equal to the
diameter of the required wheels.
The master cutter is now to. be employed in outting and preparing the revolving
cutter, which is used for cutting the blanks into wheels, and such revolving cutter
consists either of one broad edged disc, or two or more discs of steel in the
periphery or peripheries of which (by use of the master tool) is cut and formed,
teeth and spaces, such as the wheels are to be cut to.
As the teeth of the master tool as stated, are radia, it follows that the teeth and
spaces in the periphery of the revolving cutter or cutters are also radia, and that
гр.

page_text: two or more of such teeth can bear and operate upon the edge or periphery of the
blank, from which the wheel is to be formed, and that two or more completed teeth
may be cut or formed at each setting of the blank from which the wheel is
being cut.
•
Such being the nature and object of my said invention the following is a com-
plete description of same, reference being had to the accompanying drawings in
which :-
Fig. 1 shews ordinary circular cutter employed for cutting radial spaces and so
forming radial teeth and spaces in the steel cutter plate.
Fig. 2 shews the steel cutter plate employed for cutting spaces in a circular
cutter.
Fig. 3 shews circular cutter, cutting spaces and teeth in circular blank from
which a wheel is to be formed.
Fig. + is a side view of Fig. 3.
Firstly by use of the ordinary circular cutter 1 is cut the plate or tool 2, latter
must be hardened and tempered and applied as at Fig. 2, thereby to cut the
circular tool 3, latter must then have the cross spaces 4 cut as ordinary, and then
be hardened and tempered and next applied to cut the blank 6 as shown by
Figs. 3 and 4 into a wheel.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
Revolving cutters having two or more teeth and spaces out or formed radi to the
centre of the blank from which the required wheel is to be cut or formed so as to
cut two or more spaces and teeth in the blank at one operation.
Dated this 31st day of May 1892.
Dated tn18 518 day on MBY 1892.
JOHN WHITTAKER,
By his Agent, Walter Brierley,
Penny Bank Chambers, Waterhouse Street, Halifax.