Year: 1887

page_text: Date of Application, 26th Sept., 1887
Complete Left, 25th June, 1888
Complete Accepted, 27th July, 1888
I, WALTER JONES, trading as Jones and Attwood, of Enville Street, Stourbridge in
the County of Worcester, engineer and ironfounder, do hereby declare the nature of
this invention to be as follows:-
This Invention has for its object the construction and employment of a pipe cutter
which may be operated in a confined space where it would be very inconvenient to
use a cutter of the ordinary description, and which may be readily adjustable to suit
various sizes of pipes.
A pipe cutter constructed according to this invention is formed of a number of links
pivotted together, and on the pin of each pivotted joint, and within jawed ends of the
links, is carried a cutting disc or circular cutter capable of revolving thereon. Each
link is preferably formed to a curved shape longitudinally so that it may be made of
considerable depth without liability of binding against the pipe as the cutting discs cut
into the metal thereof. The links when pivotted together form a chain which is placed
around the pipe intended to be cut. The links are not joined up into a complete circle,
but a space occurs between the ends of two of the links, and pins are passed through
such ends and carry each a cutting disc. On one of these last-mentioned pins is
carried the inner end of a handle-lever, and at a suitable point in the length of such
lever is pivotted one end of a short arm formed at its other end as a jaw to pass on
each side of the other end link to that to which the handle lever is pivotted, and the
sides of such jaw are notched or hook-shaped, or similarly formed, to engage with pro-
jecting ends of the pin through the outer end of such link; and a screwed pin or bolt,
having a nut on its outer end, is pivotted to or otherwise engaged with the handle-lever
at a point near to the fulcrum of such lever, and the outer end of such pin or bolt
passes through a slot in the short arm aforesaid.
When it is desired to cut off a length of pipe, the chain of links is passed around
the pipe and the jawed or outer- end of the short arm is engaged with the pin passing
through the outer end of the other end link to that to which the handle-lever is pivotted,
and the chain of links is tightened up around the pipe by screwing the nut the
upon
screwed pin or bolt aforesaid so as to draw towards one another, or lessen the angle
between, the handle-lever and the short arm aforesaid. The cutter is moved round by

page_text: means of the handle lever, and the cutting discs are tightened or pressed up as they
cut into the pipe by means of the nut on the screwed pin or bolt, aforesaid. The outer
or jawed end of the short arm may be readily disengaged froin the projecting pin,
aforesaid, through the link, upon the slackening of the chain consequent on the cutting
through of the pipe, or upon running back the nut on the screwed pin or bolt,
aforesaid.
One end of each link, with the exception of one of the end links (preferably the
link with the projecting pin of which the jawed end of the short arm engages as
aforesaid) is formed as a wide jaw to receive a narrower jawed end of the adjacent
link within which one of the cutting discs aforesaid is placed, and the links are pivotted
together by means of a pin which passes through both jaws and through the centre of
the cutting disc. The outer ends of the two end links are each formed as narrow
jaws simply to receive a cutting disc each, and one of such links, preferably the one to
which the handle-lever aforesaid is pivotted, is formed at its other end as a wide jaw
for the purpose above described; but the other end link, that is the one with the outer
end pin of which the jawed end of the short arm aforesaid engages, is formed at its
other end as a narrow jaw to receive a cutting disc and to pass within a wide jaw on
the adjacent link, and being thus formed of the same width at each end is, preferably,
made to a parallel thickness throughout. This link has a jaw at its end which is
connected with the adjacent link, formed of considerable length, and has an additional
pin hole formed therethrough so that it may be pivotted to the adjacent link through
such additional pin hole, if desired, and thus shorten the chain of links by the distance
between the two pin holes through the jaw. The wide jaw on the adjacent link is, of
course, formed of sufficient length to allow of this adjustment in the length of the
chain of links.
In order to allow of the vibration of the short arm, and of the screwed pin or bolt, in
relation to the handle-lever as the nut on such pin or bolt is tightened up for the
purpose before described, a concave recess is formed in the outer face of tho short arm
(that is, on each side of the slot through such arm) and a washer, formed to a convex
curve on its inner face, is placed around the screwed pin. or bolt, and bears against
the curved surface of the recess as the nut is tightened up.
This cutter may be operated by moving the handle-lever a succession of strokes
alternately backwards and forwards, and the construction of the parts, especially of the
handle-lever and short arm with their means of connection with the chain of links and
the means by which they are drawn towards, one another to tighten the chain around
a pipe and to re-tighten the chain as the pipe is being cut permits of a tolerably long
stroke of the handle-lever even in the case of cutting pipes which are situated in very
confined positions. The pipe cutter may be adjusted to pipes of various sizes by adding
or removing one or more links, and an intermediate adjustment to allow for sinaller
variations may be made by means of the end link having the additional hole formed
therethrough as described.
This cutter may be employed for cutting oval pipes as well as round, pipes if occasion
requires.
Dated this. 94th day.'nh Ca

page_text: COMPLETE SPECIFICATION.
Improvements in Pipe Cutters.
I, WALTER JONES, trading as Jones and Attwood, of Enville Street, Stourbridge
in the County of Worcester, Engineer and Ironfounder, 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, reference being had to
the accompanying drawings and the letters of reference marked thereon (that is to
say) —
This invention refers to the construction of pipe cutters specially for operation in
confined spaces where it would be very inconvenient to use cutters of the ordinary
description and relates to the means of tightening up or pressing the cutting parts
around a pipe as the cutter is fixed therearound, and of further tightening up such
parts so as to press them into the pipe as it is being cut through.
The
This invention will be readily understood on reference to the accompanying
drawings, of which figure 1 is a front elevation of a cutter constructed according to
this invention; figure 2 is an edge view thereof looking in the direction of the
arrow a and figure 3 is an edge view thereof looking in the direction of the arrow b.
The cutter is shewn in each view as fixed around a pipe A preparatory to being
employed in cutting it through. The main part of the cutter consists of any desired
number of links B (according to the size of the pipe to be operated upon) and of a
single link C. The links are hinged or pivoted together by means of pins c.
links B are all constructed alike, that is with a narrow jaw at one end to receive a
cutting disc or circular cutter d carried upon a pin c (or, in the case of the end link B,
upon a pin c¹) so as to be capable of revolving thereon, and with a wider jaw at the
other end to receive the narrower jaw of the adjacent link, each pin c passing there-
fore through both a wide and narrow jaw and through a cutting disc d. The link C
is constructed with a narrow jaw at each end and is therefore made of a parallel
thickness throughout. A cutting disc is carried upon a pin c², and within the jaw at
the outer end of the link C. A handle-lever D is jawed at its inner end so as to
embrace or pass on each side of the narrower jawe of the outer link B, and is pivoted
thereto by means of projecting ends of the pin c. A short arm E is pivoted at to
the bandle-lever D, and is jawed at its outer end to embrace or pass on each side of the
outer end of the link C, and the sides g of the jaw are formed of a hooked shape so
that they may be engaged with projecting ends of the pin c³, as clearly shewn by
figure 1. The inner end of a screwed pin G is pivoted at to the lever D, and is
passed through a hole therefor in the aru E and is provided with a nut i by means of
which the outer end of the arm E and the inner or pivoted end of the lever D. may be

page_text: tightened in towards each other, thus tightening the chain of links around the pipe.
The pins c may be conveniently fixed by being screwed each into one of the sides of
the wider jaw of a link, and the pin el may be fixed by being screwed into one of
the sides of the jaw of the handle-lever D, and the pin c² by being screwed into one
of the sides of the narrow jaw through which it passes. The pins may, however,
be simply driven tight into the jaws in which they are held, or be fixed in any
convenient manner.
The method of employing the improved cutter will be readily understood. The
chain of links carrying the cutting dises is first passed around the pipe to be cut, and
then the hooked jaw of the arm E is engaged with the pin c³ and the nut i is tightened
up till the cutting discs bear tightly upon the pipe. The cutter is then operated by
moving the handle-lever D a succession of strokes alternately backwards and forwards
sufficiently to cause the entire circumference of the pipe to be borne upon and cut by
the discs, that is to say, the stroke must be sufficient to cause each disc to overlap the
cut of the adjacent disc on each side. As the discs cut into the metal the chain of
links is tightened up by tightening up the nut i from time to time until the pipo is
completely cut or broken through. When the cutter is used in a position which
admits thereof, it may of course be turned continuously in either direction around
the pipe instead of being moved a succession of strokes alternately backwards and
forwards.
In order to allow of the vibration of the arm E and of the pin G, in relation to
the handle-lever D, as the nut i is tightened up, the hole through the arm E is slotted
to the shape shewn by broken lines figure 1 and a concave recess is formed in the
outer face of the arm to receive a washer ¹ formed convex on its inner face. The
edge of the inner end of the handle-lever which is towards the pivoted arm E is
channelled or hollowed out to receive part of the arm as it is drawn inwards and thus
allow of the outer end of the arm being drawn very near to the inner or pivoted end
of the handle-lever; but the handle-lever and arm, or either of them, may of courso
be shaped in a manner which will answer the purpose without such channelling of the
handle-lever.
It is not essential that the pin G be pivoted to the handle-lever, as it may be
pivoted to the arm E and pass through the handle-lever, or it may pass through both
the handle-lever and arm and be provided with a head or nut in lieu of being pivoted,
but the arrangement shewn is very much preferred.
The employment of the handle-lever and arm with their means of connection with
the chain of links and with the means by which they are drawn towards one another
to tighten the chain around a pipe, and to re-tighten it as the pipe is being cut, permits
of a tolerably long stroke of the handle-lover even in the case of cutting pipes which
are situated in very confined positions.
The cutter may, of course, be adjusted to pipes of various sizes by adding or
removing, if required, one or more links; and an intermediate adjustment, to allow
for smaller variations, may be made, if required, by means of a pin-hole through
the jaw at the inner end of the parallel link C, such jaw and the wider jaw of the
adjacent link being of course of such a length as will readily allow of the links
being pivoted together by a pin c through the hole c. The cutter may, however, be
used for pipes of slightly varying diameters without any alteration in the chain of
links, as the screw Gallows of some degree of adjustment.
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 pipe cutter in which cutting discs or equivalent cutting parts are carried
by links pivoted togther to form a chain, a handle-lever pivoted to one end of such
chain in combination with a pivoted arm joining a part of such lever intermediate
between its ends with the other end of such chain, and with means by which the end
of the pivoted arm which is connected with the chain and the inner or pivoted end of

page_text: the handle-lever may be drawn towards one another, substantially as described, for the
purpose set forth.
2. The combination of the handle-lever D, pivoted arm E, screwed pin G (preferably
pivoted to the arm D) with nut and with suitable means for allowing for the vibration
of the arm E and pin G in relation to the handle-lever, substantially as described, for
the purpose set forth.
3. The combination of the pivoted pin G with the pivoted and hook-ended arm E,
substantially as described, for the purpose set forth.