Improved Tool and Holder for Slotting Key-ways in Pulleys, Wheels, Brackets, and the like
Year: 1889

page_text: Date of Application, 7th Aug., 1889
Complete Specification Left, 5th May, 1890-Accepted, 2nd Aug., 1890
PROVISIONAL SPECIFICATION.
Improved Tool and Holder for Slotting Key-ways in Pulleys,
Wheels, Brackets, and the like.
JOSEPH CARTER and THOMAS CARTER Engineers Millwrights and Tool Makers
Bridge Street Iron Works Bridge Street Rochdale do hereby declare the nature of
this invention to be as follows:-
The tool holder can be used on the planing machine or shaping machine but is
more especially designed for use in the slotting machine for slotting key ways in
pulleys, wheels, brackets &c. and consists of a square bar of iron or mild steel, said
bar being slotted at one end to receive a small piece of best cast steel which forms
the cutting tool, attached to the cutting tool is a small eye bolt and to the said eye
bolt is fixed a small spiral spring 4 in. long the other end of spring being held by a
pin fixed into the bar or tool holder thereby holding the cutting tool rigid when
cutting and relieving the drag in the return motion thus preserving the cutting edge
of tool the said cutting tool is held in the slot by a pin or stud which goes
through both bar & tool.
Datel this Cal
1000
JOSEPH CARTER.
THOMAS CARTER.
COMPLETE SPECIFICATION.
Improved Tool and Holder for Slotting Key-ways in Pulleys,
Wheels, Brackets, and the like.
We JOSEPH CARTER and THOMAS CARTER both of Bridge Street Ironworks
Bridge Street Rochdale in the County of Lancaster Engineers and Millwrights
do hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:—
The object of our invention is to provide a tool holder designed specially for use in
the slotting machine which holder is to be adapted to receive and provided with a
cutting tool or cutter so arranged that the said tool when commencing a cut and
during such operation shall be held in a rigid or immovable position, but, during the
period of withdrawal of the tool from the cut or work, shall allow the said tool to
yield, and by such means to obviate pressure or friction between the cutting edge of
the tool and the work and thus preserve the cutting edge of the tool, which friction,
or rubbing action, is known to occur in the case where an ordinarily fixed tool is
employed. According to our arrangement frequent grinding of the tool is avoided
also smaller tools may be employed than is permissable in the case of tools rigidly
fixed.
This invention consists of a metal bar preferably of mild steel which bar may be
termed the slide bar or holder which part is well known in slotting machines the
holder at its lower part being slotted or a recess or cavity is provided adapted to
receive a steel cutting tool which tool is provided at any convenient part thereof with
an eye piece to which piece we attach or connect the one end of a spiral steel coil
or spring the other end of which coil we attach to a stud fixed at any convenient
part of the holder the cutting tool is held in position within the recess or cavity by

page_text: means of the said spiral coil and a stud upon which the tool is mounted which stud
passes through the bar and through an aperture provided in the tool the said tool is
fitted loosely within the recess and is free to turn about the stud the chief function of
the spiral coil being to allow the cutter to deflect or move from the cutting position
during the period when the said cutter is being withdrawn from the work by this
means the cutting edge may be relieved from drag or excessive rubbing action
between it and the work consequently the cutting edge may be preserved when not
in the act of cutting.
In order to make the foregoing description more clear and intelligible we have
hereunto annexed a sheet of drawings wherein like letters of reference indicate liko
parts throughout the various figures shewn.
Figure 1. represents an elevation of our invention shewing the cutting of a key-
way in the boss of a wheel when moving in direction indicated by the arrow.
Figure 2. is a front view of Fig. 1.
Figure 3. is a sectional elevation shewing the tool deflected from the cutting
position when in the act of passing from the cut in the direction indicated by an
arrow.
At the lower extremity of the tool holder c is provided a recess or cavity d
prepared to receive a cutting tool e the said cavity being of a suitable form such
corresponding to the shape of cutter desired to be fitted within the cavity or recess
the said cavity also being of dimensions so as to allow the cutter e to fit loosely therein
the cutter is supported or mounted upon a stud f upon which it is free to turn so as
to allow the cutter to move about the axis of the stud in any convenient direction the
said stud may be situated at the part as indicated in the drawings or any other con-
venient position may be assigned thereto the cutter is held in a cutting position before
commencing a cut by means of a spiral coil y of suitable dimensions also by the aid
of which coil the cutter e is allowed to become doflected or move from its normal or
cutting position during the period of its withdrawal from the work see Fig. 3. after
withdrawal the coil having one extremity attached to an eyepiece / its other
extremity attached to a fixed stud i the action of the spring or coil causes the cutter e
to resume its normal position.
We will now proceed to explain the action of our invention.
As shown in Fig. 1. the tool is represented in the act of cutting a wheel boss
supported on a table of a slotting machine the head of the cutter being then in
engagement with the upper side of the recess this is also the position of the cutter
before the commencement of a cut upon the completion of each cut or when the
return stroke commences and during the period of such stroke any drag or pressure
that may occur between the side m of the key-way n and the cutting edge o of the
cutter results in the deflection of the cutter from the cutting position which latter
position is represented by dotted lines see Fig. 3. also the spiral coil to become
distended to a greater or less extent according to the drag arising from various causes.
When the cutter has passed from the work the same is then caused by the aid of the
coil to resume its normal position.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :
1. In a machine for slotting or cutting key-ways in wheels, pulleys, brackets and
the like the use and application of a tool holder provided with a cutter such as is
herein described, so arranged, that during the operation of cutting the cutter shall
have a rigid position, but, during the withdrawal thereof from the work, shall be
capable of deflection with relation to the cutting position, and after withdrawal, shall
be capable of automatic adjustment to the normal or cutting position substantially as
herein before described.
2. The combination in a slotting machine of mechanism or arrangement such as is

page_text: herein described whereby the cutter is caused to have a movement with relation to
the holder as and for the purpose herein set forth and fully described in the annexed
drawings.
3. The movable or swivel cutter e, substantially as and for the purpose herein fully
set forth and described in the drawings hereunto annexed.
12:
D 1000
JOSEPH CARTER.
THOMAS CARTER.
J. H. Butterworth,
For the Applicants.
JOSEPH CARTER.
THOMAS CARTER.
J. H. Butterworth,
For the Applicants.