IMPROVEMENTS IN TOOLS USED FOR CUTTING TUBES OR PIPES OR OTHER SIMILAR ARTICLES
Year: 1881

page_text: LETTERS PATENT to William Maiden, of the Firm of W. & J. Maiden, of
Hyde, in the County of Chester, and Egbert Fletcher Cowley, of the Firm of
John Cowley & Son, of Walsall, in the County of Stafford, for an Invention
LETTERS PATENT to William Maiden, of the Firm of W. & J. Maiden, of
Hyde, in the County of Chester, and Egbert Fletcher Cowley, of the Firm of
John Cowley & Son, of Walsall, in the County of Stafford, for an Invention
of "IMPROVEMENTS IN TOOLS USED FOR CUTTING TUBES OR PIPES OR OTHER
SIMILAR ARTICLES."
PROVISIONAL SPECIFICATION left by the said William Maiden and Egbert
Fletcher Cowley at the Office of the Commissioners of Patents on the 3rd May
1881.
WILLIAM MAIDEN, of the Firm of W. & J. Maiden, of Hyde, in the County of
Chester, and EGBERT FLETCHER COWLEY, of the Firm of John Cowley & Son, of
Walsall, in the County of Stafford. "IMPROVEMENTS IN TOOLS USED FOR
CUTTING TUBES OR PIPES OR OTHER SIMILAR ARTICLES."
This Invention relates to that class of hand-tool having a claw at one extremity
for grasping the article to be cut, and provided with one or more circular cutters or
bevil edged dises which is or are forced up against the tube or other article
requiring to be cut by a screw action, and has for its object the cutting off of the
burrs formed on each side of the cut or groove by the forcing up of the circular
cutter simultaneously with the cutting off action.
In carrying out our Invention we form a recess on the inside of the claw, and
upon a pin running across this recess parallel with the axis of the circular cutters
we mount or suspend a peculiarly formed cam having one or more cutting edges
formed on its surface, which cam adjusts itself to any size or diameter of pipe or
other article, and by means of its cutting edges serves to remove or cut off the
burrs as they are formed by the forcing up of the circular cutters, and to reduce
the strain upon the opposite side of the claw we sometimes apply friction bowls
working in suitable bearings at that side of the claw.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Maiden and Egbert Fletcher Cowley in the Great Seal
Patent Office on the 3rd November 1881...
WILLIAM MAIDEN, of the Firm of W. and J. Maiden, of Hyde, in the County
of Chester, and EGBERT FLETCHER COWLEY, of the Firm of John Cowley & Son, of
Walsall, in the County of Stafford. "IMPROVEMENTS IN TOOLS USED FOR CUTTING
TUBES OR PIPES OR OTHER SIMILAR ARTICLES."
This Invention relates to that class of hand-tool having a claw at one extremity
for grasping the article to be cut, and provided with one or more circular cutters
or bevil edged discs which is or are forced up against the tube or other article
requiring to be cut by a screw action, and has for its object the cutting off of the
burrs formed on each side of the cut or groove by the forcing up of the circular
cutter simultaneously with the cutting off operation.. In carrying out our Inven-
tion we form a recess on 'the inside of the claw, and upon a pin running across this
recess parallel with the axis of the circular cutters we mount or suspend a peculiarly
formed cam having one or more cutting edges formed on its surface, which cam
adjusts, itself to any size or diameter of pipe or other article, and by means of its
cutting edges serves to remove or cut off the burrs as they are formed by the forcing
up of the circular cutters, and to reduce the strain upon the opposite side of the
claw we sometimes apply friction bowls working in suitable bearings at that side
of the claw. And in order that this our said Invention may be the more readily
understood and carried into practical effect, we have hereunto annexed a Sheet of
Drawings illustrating two modifications of our Invention, and will now proceed to
describe the same by the assistance of the figures and letters of reference marked
thereon. Fig. 1 is a side view'; and Fig. 2, a side sectional view of the head of a
pipe cutter or tool having our improvements applied thereto. Fig. 3 is a side view;
and Fig. 4, a side sectional view of a pipe cutter or tool having another modification
of our improvements applied thereto.
In all the views A is the usual claw for grasping the pipe or other cylindrical
artical requiring to be cut; and B is the bevil edged or circular cutter which is
forced forward by a screw action, and thus performing the cutting operation as
heretofore. In the foregoing respects this apparatus. does not differ from pipe
cutters already in use, but our Invention consists in forming a 'recess C on the
inside of the claw A, and having a pin D running across this recess parallel with the
axis of the circular cutter B, and upon which pin we mount a peculiarly formed
cam E provided with one or more cutting edges e and with a flat f on its front
surface. This cam E, so constructed and mounted, is capable of adjusting itself
selfactingly to any size or diameter of pipe or other article requiring to be cut, and
which article is held, as indicated by the letter G in Fig. 2, between the inner
surface of the claw A and the flat f formed upon the cam E, and so that the cutting
edge e is presented at such an angle that it serves to cut off the burrs or projections
as they are formed on each side of the cut by the forcing up of the circular
cutter B.
And in order to reduce the strain 'upon the opposite side of the claw, and to
prevent the tendency to form or wear a groove on the inside surface of the claw,
we sometimes apply a friction bowl at that point, as indicated by the letter H in
Figs. 3 and 4, this friction bowl being mounted upon a suitable pin J running
across the recess I formed to receive it. In this case the article to be cut is held,
as indicated by the letter K in Fig. 4, and revolves upon the friction bowl H.
Having thus particularly described and ascertained the nature of this our said
Invention, together with the best methods with which we are acquainted for

page_text: carrying the same into practical effect, we wish it to be understood that what we
claim as our Invention and desire to secure by Letters Patent is,—
+
1st. The use and application to tools used for cutting tubes or pipes or other
similar articles of a peculiarly formed cam provided with one or more cutting
edges, substantially as and for the purposes herein before described and illustrated
on the accompanying Drawing.
2nd. In combination with the peculiarly formed cam herein before described, the
use and application of a friction bowl, substantially as and for the purposes herein-
before described and illustrated on the accompanying Drawings.
In witness whereof, we, the said William Maiden and Egbert Fletcher
Cowley, have hereunto set their hands and seals, this Second day of
November, in the year of our Lord One thousand eight hundred and eighty
one.
WILLIAM MAIDEN.
(L.S.)
EGBERT FLETCHER COWLEY. (L.S.)