Improved Tool and Tool-holder for Cutting Off in Short, Definite, and Equal Lengths Cylinders or Rings from Metal Tubes.
Year: 1896

page_text: Date of Application, 31st Dec., 1896
Complete Specification Left, 29th Sept., 1897-Accepted, 27th Nov., 1897
Improved Tool and Tool-holder for Cutting Off in Short, Definite, and
Equal Lengths Cylinders or Rings from Metal Tubes.
I JAMES RAMSAY Glendower Erith Road, Erith, Kent Civil Engineer do hereby
declare the nature of this invention to be as follows:-
For this purpose I construct a tool as follows.
The body or tool holder approximates in shape on plan to the capital letter T.
The two arms of the head carry respectively a cutting tool, and a facing tool, the
latter set in position, so that it will operate in advance of the former. The stem
is for the purpose of conveniently fixing the tool in the slide rest of a lathe or
machine like an ordinary turning tool.
The cutting off, or parting tool, consists of a knife roller mounted on a spindle,
and substantially, the same as existing knife cutting rollers. The facing up tool
can be made of a small piece of steel, of any convenient section, but for preference,
a piece of round steel, suitably ground on cutting face and channeled or flatted
along its upper length, for convenience in holding. It is clamped in position by
an ordinary set screw, for simplicity, but may of course be clamped in many other
ways. It is held up to its work and adjusted for any definite length of ring by
a set screw, tapped into the tool holder, in the rear end of the tool, or it may be
controlled in either direction by a screw mounted like the screw in an ordinary
lathe poppet head.
Given therefore a tube to be out up into rings, the tube would be fixed preferably
in a hollow mandril lathe, or machine, with sufficient of its length projecting
beyond the face of the chuck to 'make one or several rings.
The saddle or slide rests carrying the tool is brought up to the work in correct.
position, so that the facing tool will just square up the end of tube, with the
minimum waste of metal, and a continued cross movement of the slide rest
brings the cutting roller to bear on the tube and cut off a ring, equal in length to
the distance between the face of facing tool and centre line of knife edge of cutting
roller.
Again referring to the shape of the tool holder I do not bind myself that the shape
will be in all cases in plan like the letter T. I have used this illustration chiefly.
to aid description. It will do as well in that shape as any other.

page_text: COMPLETE SPECIFICATION.
Improved Tool and Tool-holder for Cutting Off in Short, Definite, and
Equal Lengths Cylinders or Rings from Metal Tubes.
I, JAMES RAMSAY, of Glendower Erith Road, Erith, in the county of Kent,
Mechanical Engineer, 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;-
That the nature of my improvements are as follows;-
I construct a tool in which the body or tool holder approximates in shape on
plan to the letter T. The two arms of the head carry respectively a cutting tool
and a facing tool, the latter set in position so that it will operate in advance of the
former. The stem is for conveniently fixing the tool in the slide rest of a lathe
or machine like an ordinary turning tool.
The cutting off or parting tool consists of a knife roller mounted on a spindle and
substantially the same as existing knife rollers. The facing up tool can be made
of a small piece of steel of any convenient section but for preference a piece of round
steel suitably ground on cutting face and channelled or fluted along its upper length
for convenience in holding. It is clamped in position by an ordinary set screw
for simplicity, but may of course be clamped in many other ways. It is held up
to its work and adjusted for any definite length of ring by a set screw tapped into
the tool holder in the rear end of this tool. Or it may be controlled in either
direction by a screw mounted like a screw in an ordinary lathe poppet head.
Given therefore a tube to be cut into rings, the tube would be fixed preferably
in a hollow mandril lathe or machine with sufficient of its length projecting beyond
the face of the chuck to make one or several rings. The saddle or slide rest carry-
ing the tool is brought up to the correct position so that the facing tool will just
square up the end of the tube with a minimum waste of metal and a continued cross
movement of the slide rest brings the cutting roller to bear on the tube and cut off
a ring equal in length to the distance between the face of facing tool and the centre
line of knife edge of cutting roller.
Again referring to the shape of the tool holder, I do not bind myself that the
shape of the toolholder will in all cases be in plan like the letter T. I have used
this illustration chiefly to aid, the description. It will do in that shape or any other,
and it is obvious that it may be modified in many ways as regards shape.
In accompanying drawing,