An Improved Device for Cutting Tubes, adaptable to Existing Hand Tools.
Year: 1894

page_text: Date of Application, 22nd Sept., 1894
Complete Specification Left, 22nd June, 1895-Accepted, 17th Aug.. 1895
PROVISIONAL SPECIFICATION.
An Improved Device for Cutting Tubes, adaptable to Existing
Hand Tools.
I FREDERICK JOHN BURRELL of St. Nicholas Works, Thetford in the County
of Norfolk, Engineer do hereby declare the nature of this invention to be as
follows:-
The invention consists of a wedge shaped cutter of steel or other suitable
material and provided with one or more cutting edges, and arranged to be used in
the jaws of any ordinary spanner screw-hammer or similar hand tool, whether with
fixed or adjustable jaws. The wedge shaped cutter is inserted between the jaw of
the spanner and the tube which is intended to be cut. The angle of the cutting
edge of the wedge is such that the cutter gradually works its way into the tube
and is drawn inwards, sliding upon the jaw of the spanner and requiring no other
tightening than that caused by the spanner being turned in one direction. The
wedge cutter automatically adjusts itself to the necessary depth of cut, and in so
efficient a manner that one turn of the spanner is usually sufficient to cut tubes of
ordinary thickness.
The wedge cutter may be made of triangular cross section, so as to provide
3 cutting edges, either of which can be used, and forming a section of great
strength and durability; or the wedge cutter may be of rectangular cross section
with one or more cutting edges on its upper surface which comes next the tube.
In order that the cutting edge of the wedge piece may be kept at right angles
to the axis of the tube which is being cut, I may provide a clip with side flanges
to fit the jaws of the spanner and having upon its upper surface a tongue or rail
fitting into a corresponding longitudinal groove in the under side of the wedge
cutter. This clip may be made with adjustable set screws on one side so as to fit
upon spanners with jaws of varying thickness.
Dated this 21st day of September 1894.
FREDERICK JOHN BURRELL.
COMPLETE SPECIFICATION.
An Improved Device for Cutting Tubes, adaptable to Existing
Hand Tools.
1, FREDERICK JOHN BURRELL, of St. Nicholas Works, Thetford, in the
County of Norfolk, 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:-
My invention relates to an improved device for cutting tubes adaptable, to:
existing hand tools, which consists of a taper or wedge shaped cutter of steel or
other suitable material and provided with one or more cutting edges, and arranged
to be used in the jaws of any ordinary spanner screw-hammer or similar hand tool,
whether with fixed or adjustable jaws.
And in order that my invention may be thoroughly understood, I now proceed

page_text: to describe the accompanying drawing thereof, reference being had to letters and
figures marked thereon.
Figs. 1, and 2. are side elevations of the cutter.
Figs. 3, 4, 5, 6, are various end views of the cutter.
Figs. 7, and 8, are elevations of the clip.
Figs. 9, 10, 11, and 12, are various end views of the clip.
Figs. 13, and 14, show the cutter and clip in position in the spanner when cutting
the tube, the dotted lines showing the position the tube reaches when cut.
Figs. 15, and 16, show the cutter in position and the clip dispensed with by the
use of the groove g¹ in the jaw of the spanner and a rib on the cutter.
The arrows show the direction in which the spanner is turned to cause the cutter
to act upon the tube a.
This invention consists of a taper or wedge shaped cutter 6 of steel or other
suitable material and provided with one or more cutting edges, and arranged to be
used in the jaws c of any ordinary spanner screw-hammer or similar hand tool,
whether with fixed or adjustable jaws. The wedge shaped cutter is inserted
between the jaws c of the spanner and the tube a which is intended to be cut.
The angle of the cutting edge of the wedge bis such that the cutter gradually
works its way into the tube a and is drawn inwards, sliding upon the jaw of the
spanner and requiring no other tightening than that caused by the spanner being
turned in one direction.
The wedge cutter.automatically adjusts itself to the necessary depth of cut, and
in so efficient a manner that one turn of the spanner is usually sufficient to cut
tubes of ordinary thickness.
The wedge cutter b may be made of triangular cross section, so as to provide
three cutting edges, either of which can be used, and forming a section of great
strength and durability; or the wedge cutter may be of rectangular cross section
with one or more cutting edges on its upper surface which comes next the tube.
In order that the cutting edge of the wedge piece may be kept at right angles
to the axis of the tube which is being cut, I may provide a clip d with side
flanges e to fit the jaws c of the spanner and having upon its upper surface a tongue
or rail fitting into a corresponding longitudinal groove g in the under side of the
wedge cutter.
This clip may be made in various forms as in Figs. 9, 10, 11, and 12, so as to be
readily adjustable to fit spanners with jaws of varying thickness, or the clip may be
dispensed with by forming a groove in the jaw of the spanner in which a rib on the
cutter is caused to slide.
The clip is provided with set screws in Figs. 8, 11, 12, 13, and 14.
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 :-
1. In a device for cutting tubes, the taper or wedge shaped cutter having one or
more cutting edges provided with tongues rails or grooves arranged to act as guides
in the jaws of a spanner by means of a clip with side flanges and adjustable by set
screws or other means, the said clip having on its upper surface a tongue, rail or
groove to receive the said cutter, substantially as herein described and according to
the accompanying drawing.
2. In a device for cutting tubes, the combination of a taper or wedge shaped
cutter with one or more cutting edges and the tongue or rail sliding in a groove
formed in the jaw of the spanner, substantially as herein described and according
to Figs. 15, and 16, of the accompanying drawing.
Dated this 22nd day of June 1895.
J. P. BAYLY,
18 Fulham Place, W., Agent for the Applicant.