Improved Means for Cutting out a Section of Pipe, and for Connecting a Branch or Valve to the Pipe.
Year: 1897

page_text: Date of Application, 27th July, 1897-Accepted, 6th Nov., 1897
COMPLETE SPECIFICATION.
Improved Means for Cutting out a Section of Pipe, and for Connecting
a Branch or Valve to the Pipe.
I, CHARLES ARTHUR ALLISON, of 52 Chancery Lane, London, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention, (which
has been communicated to me from abroad by Morris Robeson Sherrerd, of
128 Halsey Street, Newark, and David Willis French, of No. 1 Newark Street,
Hoboken, both in the State of New Jersey, United States of America, Engineers)
and in what maner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The object of my invention is to provide means for cutting out a section of
pipe, for removing the cutting machine and the section of pipe cut by it, and for
sealing up a casing, branch, or valve around the severed part of the pipe without
stopping the flow of fluid through the pipe.
One part of the invention consists in an improved pipe cutting machine adapted
to cut out a section of pipe, and another part of the invention consists in a divided
or split casing or branch adapted to be clamped around a pipe and having an
internal chamber adapted to surround the pipe and within which a cutting
machine may be operated to cut out a section of the pipe, said chamber having a
space into which the pipe cutter can be drawn, said casing having a removable
portion to enable the pipe cutter to be removed, and a valve arranged to be closed
between the pipe-cutter and the severed pipe to enable said cutting machine to
be removed while allowing the fluid to continue to flow through the pipe. Tho
casing may, when desired, be provided with valve seats and valve gates or disks
to regulate the flow of fluid through the pipe after the parts are adjusted thereon.
The invention also consists in the novel details of improvement and the com-
binations of parts that will be more fully hereinafter set forth and then pointed
out in the claims.
Reference is to be had to the accompanying drawings forming part hereof,
wherein, Figure 1 is a vertical central section through the pipe cutter and casing,
shown mounted on a pipe, also in section, the upper portion of the casing, or what
is termed its bonnet, being removed; Figure 2 is a plan view on a reduced scale
of the casing, showing a valve and its seat; Figure 3 is a side elevation thereof;
Figure 4 is a cross section, slightly modified, of the devices shown in Figure 1,
illustrating the pipe cutter and its tool-carrying devices; Figure 5 is a cross
section of the pipe cutter, showing means for operating the tools; Figure 6 is a
vertical section, corresponding to Figure 1, through the bonnet, showing the pipe
cutter in section and illustrating the manner of removing the pipe cutter and pipe-
section from the casing; Figure 7 is a vertical section, at right angles to Figure 6,
through the upper part of the casing or bonnet, showing means for raising the
cutting machine into the bonnet; Figure 8 is a plan view of the bonnet; Figure 9
is a plan view, showing the tool guide and feeding wheel; Figure 10 is a vertical
central section through the casing, showing a valve for checking the outflow
therefrom; Figure 11 is a plan view thereof; Figure 12 is a vertical central
section, showing the valve complete and in position on a pipe which has had a
cross section removed; Figure 13 is a plan view of a wedge or block for spreading
the gates or disks against their seats; Figure 14 is a perspective view of said block

page_text: or wedge; Figure 15 is a perspective view of the gate or valve-disk; Figure 16
is a vertical central section through the casing, showing a pipe cutter within the
casing; Figure 17 is a similar view, at right angles to Figure 16.
In the drawings, number 1 indicates a pipe and 2 is a casing or branch which is
split or divided longitudinally and adapted to be clamped around said pipe,
parts 2, 2b thereof being shown provided with flanges 2, 24, which are held together
by bolts or screws 2° (see Figures 1, 2, 3 and 17). But parts 2a, 2b can be held
together by other means. Casing 2, in Figure 2, has four ways or outlets, but it
may have two or more. Casing 2 is provided with a chamber 3, to surround the
pipe to be cut, and of sufficient diameter to contain a pipe cutting machine and to
allow its cutters to travel around the contained pipe (see Figures 1, 4 and 17).
The hubs or ways have annular recesses around the pipes to receive packing. One
side of casing 2 is provided with an opening 3", leading to chamber 3, to permit
the pipe cutter to be removed from the casing. (See Figures 1, 4, 10 and 17).
Casing 2, or portion 2b thereof, carries a valve seat. 4, surrounding opening 3",
and a valve 5 is provided to close against said seat to stop the flow of water from
the casing. In Figures 1, 6 and 10 seat 4 is shown cast integral with the corres-
ponding portion (2b) of casing 2, while in Figure 12 seat 4 is made separate and
secured to the casing. In Figure 4 seat 4 is shown carried by a tube or casting 6,
bolted to casing 2, tube 6 having a flange 6 that rests on a flange 7 carried by
casing 2, said flanges being held together by bolts. Above seat 4 is a bonnet or
cover 8, shown provided with a flange S", to rest on flange 7, or on an upper flange
on tube 6, said flanges being neld together by bolts or screws, the volume of bonnet 8
being sufficient to receive a pipe cutting machine within it, as hereinafter
explained. Bonnet 8, when in position on casing 2, constitutes an enlargement of
chamber 3. In Figures 1 and 6 valve 5 is shown in the form of a plate adapted to
stand vertically within bonnet 8 and to drop upon seat 4. I have shown said valve
as suspended within bonnet 8 by a screw 9 threaded in the wall thereof and
adapted to engage threads in a bore 5ª in said valve (see Figure 6). By pre-
ference the position of bore 5ª, relatively to seat 4, is such that when valve 5 is
suspended by screw 9 its lower edge 5b will lie behind seat 4 and be raised from
the surface of the casing. By this means when screw 9 is withdrawn from
bore 5 valve 5 will descend slightly to move bore 5" out of line with screw 9, so
that when screw 9 is again screwed inwardly it will push valve 5 over (without
re-engaging the threads in bore 5") to cause the valve to descend upon seat 4, as
in full lines in Figure 6. Screws 10 threaded in casting 2b, are then screwed down
upon valve 5 to hold it firmly upon its seat.
In Figure 10 valve 5 is shown arranged to, be slid horizontally over seat 4, and
for this purpose casing 2b is shown provided with a pocket or chamber 11, having
an opening 11 in line with seat 4. The bottom of chamber 11 is preferably below
the plane of the surface of seat 4. Valve 5 is shown provided with a threaded)
bore 12 adapted to receive the threaded end of a rod 13, which is adapted to slide
through an opening 13" in the wall of chamber 11, and through a stuffing box 14.
Thus, valve 5 can remain in chamber 11 until it is desired to close opening 3º,
whereupon rod 13 will be pushed inwardly, thus sliding valve 5 over seat 4, where
it may be held by screws 10. If it is desired to thereafter permit the passage of
fluid through opening 3" (as to a branch pipe connected with flange 7) valve 5
can be withdrawn into chamber 11, rod 13 being then unscrewed therefrom which
will allow the corresponding end of the valve to drop down in said chamber, where
it may be held by a screw 15, threaded in the wall of chamber 11. According to
Figures 12 and 16 pocket or chamber 11 can be removable, and when so removed
opening 11 can be closed by a plate 11b secured upon the branch or casing, as in
Figure 12.
The pipe cutting machine is arranged, and used in connection with the casing
and its valve 5, as follows: 16 is a divided or split ring or frame, adapted to be
clamped around pipe 1, and having flanges 16" and bolts 17 to clamp it around the
pipe, screws 16b serving to centre said ring upon the pipe. Ring or frame 16 has

page_text: two parallel annular peripheral guide-ways 18, having inner guide shoulders 18ª,
upon which guide-ways cutter-carriers or rings 19 are adapted to rotate, said rings
having gear teeth 20. Rings 19 are split or divided crosswise and have flanges 19"
and bolts 21 by which the rings can be bolted around guide-ways 18. Guide-
ways 18 and rings 19 are located at opposite ends of frame or ring 16. The cutter-
carriers or gear-rings. 19 are shown held upon frame 16 and guided to rotato
thereon by rings 22, which are divided crosswise and held upon said frame by
screws. By having parts 16, 19, 22, split or divided crosswise they can be clamped
upon a pipe whose ends are buried in the ground, first excavating around the pipe
sufficiently to receive the cutting machine and casing 2.
a are cutting tools carried by rings 19 to cut pipe 1, said tools being located
outside of rings 22 to sever the pipe in two parallel annular lines so as to cut out
a section of pipe. These tools are shown carried by a sliding head or tool carrier b,
that is guided to travel toward pipe 1 in ways c, c, carried by and projecting from
rings 19. d is a screw for holding the tool upon its carrier b. e is a screw carried
and guided by plates f, f¹, and meshing with threads in a bore in carrier bi
whereby as said screws are turned carrier b will advance and feed the tool toward
the pipe. The tools are preferably fed automatically by the rotation of rings 19,
and for this purpose the screws e carry star-wheels g, adapted to engage projec-
tions 23 carried by a yoke or support 23, whereby as the tools are carried around)
by rings 19, they will be fed to the pipe intermittently. By preference the tools
are provided with two or more cutting edges so that if one should break the work
can be continued without removing the device from the pipe. Frame 16 carries
the yoke 23 which is provided with a bore or bearing in which is journaled a
shaft 24 carrying a pinion or gear wheel 25, meshing with gears 20 of rings 19.
When shaft 24 is rotated rings 19 will rotate in unison around frame 16 and pipe 1.
Suitable means may be provided for rotating shaft 24. I preferably rotate
shaft 24 by means of a counter shaft 26 to reduce the tendency of the pipe cutter
to twist or bend pipe 1. For this purpose shaft 24 is provided with a gear wheel 27,
outside of yoke 23 and meshing with a pinion or gear 28 on shaft 26 (see
Figure 5). The upper end of bonnet 8 is closed, and is provided with an
aperture 26° for the passage or journaling of shaft 20, and with a hollow or tubular
extension 8 that contains a stuffing box or packing 29, suitably arranged to make
a fluid-tight joint around shaft 26 (see Figures 7 and 8). This stuffing box may
be held in place by bolts or screws 29" connected with bonnet 8. The outer end of
shaft 26 may be squared or otherwise arranged to receive a crank or handle for
rotating it.
may
To assist in keeping the cutting device from twisting during operation, and to
provide means for raising the same from the pipe when a section of pipe is cut
out, I connect a shaft, tube or rod 30 with the shaft 24 or wheel 27, which tube or
10d passes through a guide opening or journal 30" in the upper part of bonnet 8
(see Figures 6, 7 and 17). Tube or rod 30 also passes through a stuffing box 31
and follower or bushing 31°, at the upper part of bonnet 8, which follower be
held on the bonnet by bolts or screws 32 connected therewith. For convenience
I have shown tube 30 provided with a plug 33 at its lower end, said plug having
a threaded bore 34 meshing with threads 35 on shaft 24 or carried by wheel 27
(see Figure 6). Thus tube or rod 30 can be readily detached from the cutting
machine when the latter is removed from bonnet 8. Shaft 26 and tube or rod 30
being parallel and both guided by bonnet 8 serve to resist twisting of the pipe
cutter while it is being operated. It is evident that if power is applied direct to
tube or rod 30 it will operate gear 25 to rotate gear-rings 19.
While shaft, tube or rod 30 can be drawn outwardly by any suitable means to
lift the pipe cutter, with the attached cut-out section of pipe, into the bonnet 8,
we have shown a convenient means for the purpose as follows: The upper part of
tube 30 is threaded at 30b to engage a threaded rod 36, and around tube 30 and
rod 26 is placed a tube 37 which may rest upon follower 31". A wheel, lever or
handle 38, having threads in a bore to mesh with the threads of rod 30, rests upon

page_text: tube 37 (see Figure 6) and when it is turned it will act to raise rod 36 and tube 30,
and consequently lift the cutting machine above seat 4.
The manner of using the casing or branch and the pipe cutter in connection
therewith may be described as follows:-Frame 16 is first clamped around pipe 1,
cutter-carriers or gear-rings 19 being clamped around guide-ways 18, and retaining
rings 22 secured on frame 16 around the pipe, the cutting tools being properly set
relatively to pipe 1. Casing 2 is next clamped around pipe 1 and around the
cutting machine so that it will be contained within chamber 3 thereof. Casing 2
is next packed around pipe 1, and one or more other branch pipes 1" are connected
with the corresponding ways of the main branch, if desired. Bonnet or cover 8
is then secured to casing 2, as upon flange 7, valve 5 being meanwhile adjusted in
position to leave seat 4 uncovered, but so that it can cover the seat subsequently;
shafts or rods 26, 30, being also adjusted in their bearings and stuffing boxes, and
the bonnet sealed. If desired rod 36 may be connected with rod, tube or shaft 30
at this time, and tube 37 placed around the latter under wheel or handle 38, and
the latter can be moved to such position that wheel 38, rod 36, tube 37 and tube
or shaft 30 will act to sustain the cutting machine when the section of pipe is cut
out. The parts being thus assembled in working position, shaft 20 is rotated,
whereupon both cutter carriers 19 rotate around frame 16 and the cutters act
upon the pipe in unison to sever the same in two parallel lines, thus cutting out a
cross section 1b of pipe 1,in chamber 3, of casing 2. Water, gas or other fluid
from pipe 1 will now fill casing 2 and its bonnet 8, and surround the cutting
machine, and to remove the machine with its attached cut-out section of pipe it
is first raised to the upper part of bonnet 8, as in Figure 6, and then valve 5 is
caused to close against seat 4, thus shutting off the flow of fluid through
opening 3 of casing 2. The bonnet with its contained cutting machine and the
attached section of pipe can next be removed from casing 2, and a cover or plate
can be fastened over opening 3, upon flange 7. Or, with the valve arrangement
of Figure 10 a branch pipe can be connected with flange 7, and then valve 5
withdrawn. In either case valve 5 being closed after the cutting machine and
its attached section of pipe are removed from pipe 1, enables said machine to be
removed from casing 2 without the loss of fluid.
The casing, arranged as hereinbefore described, enables a main pipe to be con-
nected with branch pipes without stopping the flow of fluid, but sometimes it
becomes necessary to insert a valve in the pipe to control the flow therethrough.
For this purpose we provide the casing with valve-seats, and also provide valve-
disks or gates and means to operate them to close them against said seats, as shown
in Figures 12 to 15. The same arrangement of casing and pipe cutting machine
as before described may be used, but any suitable change in the form and shape of
the casing and its bonnet 8 may be made to provide for the reception of the
disks or gates, if desired. For these purposes the casing 2 is provided with
seats 40, 41, which are divided or split transversely coincidently with the division
of the parts 2a, 2b, of casing 2, to enable said seats to be clamped around pipe 1:
with casing 2. By preference these seats 40, 41, are ring-like or semi-rings which
may be secured to the respective portions of casing 2 by dove-tail joints (see
Figure 12), or otherwise. The parts 2ª, 2b, may be provided with dowel pins and
sockets 10 (see Figure 17) to hold seats 40, 41, in proper relative positions. The
opening 3 will be of proper dimensions to permit the passage of valve-disks or
gates, as well as the pipe cutting machine. In Figure 16 the valve chamber 11
is removable from the main casing 2, and valve 5 is shown having one face
inclined to engage a supplemental seat 4ª, carried by casing 2. In this case rod 13
is screw threaded and journaled in box 14 to project valve 5. The housing of
valve-chamber 11 is provided with a flange or lugs 11° to be screwed or bolted
upon extension 7° of casing 2, whereby the housing can be removed and replaced
by a plate 11b (Figure 12).
Any suitable valve may be used to close against seats 40, 41. I have shown an
improved gate valve as follows:-42, 43, are gates or disks carrying seats 40", 41",

page_text: to close against seats 40, 41, (see Figure 12). Gates 42, 43 are provided with
inclined projections 42, 43, located on the sides opposite seats 40, 41. These
projections have a recess 42b, to permit the passage of a feeding screw 44.
Disks 42, 43, each have an extension 45, 46, which are undercut at 47, 48, forming
overhanging ledges or flanges 49, 50, which ledges are adapted to be engaged by
projecting arms 51, 52, carried by a lifter 53. Arms 51, 52, are shown having
upwardly and outwardly inclined surfaces 54, 55, adapted to bear against
ledges 49, 50, so that as lifter 53 rises (when the gates are against their seats) these
inclined surfaces will draw the ledges 49, 50, toward each other, thereby acting to
move seats 40, 41", away from seats 40, 41, before disks 42, 43, move away from.
scats 40, 41. Gates 42, 43, are provided with lugs 56 (see Figure 15) adapted to
receive the ends of arms 51, 52, against which lugs said arms may abut. These
lugs serve with said arms to keep the gates from turning relatively to lifter 53.
The disks or gates 42, 43, are pressed toward seats 40, 41, by a wedge or inclined
block 57 adapted to engage the inclined faces or projections 42", 43. This
wedge 57 is shown provided with brass or similar cap 58 having two oppositely
inclined faces 59, 60. Wedge 57 has a bore 61 (Figure 13) to permit the passage
of screw 44, and also has an extension, shelf or Hange 62 adapted to be raised by..
projections 63, 64, carried by gates or discs 42, 43, to carry wedge or block 57 up
and down with the gates. Extension or flange 62 is shown provided with
depending ledges 65, 66, having downwardly and outwardly inclined faces that
are adapted to engage corresponding faces on ledges 67, 68, carried by projec-
tions 63, 64. Ledges 65, 67, and 66, 68, co-act to draw the lower parts of
gates 42, 43, toward each other when they are lifted or suspended by lifter 53 to
cause seats 40, 41, to clear the projecting ends of pipe 1 as the gates are raised
and lowered. Furthermore, for this purpose, we have shown disks 42, 43,
(Figure 12) as having upper webs or projections 70, which extend outwardly
beyond the working faces of seats 40, 41" When the gates are against their
seat webs or projections 70 enter recesses 71 in the inner wall of opening or
way 3, the surface of said wall being in such position that when projection 70
rises with the gate said wall will act with said projection to push the gate and its.
seat away from corresponding seat 40 or 41. At the lower parts of gates 42, 43,
cn opposite sides, of, or above and below, seats 40, 41, are located projecting
webs 72, 73, adapted to encounter the ends of pipe 1 that project into chamber 3.
The sides or faces of webs 72, 73, are inclined or bevelled, as shown, to cause them
to ride freely past the ends of pipe 1. With this arrangement, as the gates are
moved to close the ends of pipe 1, within chamber 3 of casing 2, webs 72 will
encounter the ends of the pipe, whereupon the gates will be moved toward cach
other, and as said webs slide along the pipe they will keep seats 40, 41°, from
touching the latter, and when webs 72 pass away from the pipe the webs 73 will
still keep said seats from touching the pipe. After webs 73 pass from the ends
of the pipe, seats 40, 41, may close against seats 40, 41. When the gates are to
be moved from the position shown in Figure 12, or raised, webs 73 will first
encounter the ends of the pipe, to move the seats out of possible engagement with
the pipe, and projections 70 will engage the walls of opening or way 3º, to
separate the upper parts of said seats from seats 40, 41. When webs 73 pass from
the pipe the webs 72 will continue to hold the seats 40, 41", from touching the
pipe. By these means seats 40, 41, are kept from slipping along the rough edges
of the severed pipe. When webs 70, 72, 73, are used the inclined faces 54, 55,
as well as projections 65, 66, 67, 68, may be dispensed with, if desired. But other.
means may be provided to draw or move the gates toward each other is desired.
Wedge or block 57 abuts against a rib 75 on the bottom of casing 2 (see Figure 12).
The screw 44 meshes with threads 76 in the bore of lifter 53, and when rotated
it will act to raise or lower said lifter and gates 42, 43. The lower end of the
lifter, or its arms 51, 52, act on projections 42, 43, of gates 42, 43, to push the
latter upon block 57 to cause the gates to spread apart to close the valve.. Screw 44
is shown journaled in bearing 30° and a stuffing box 31ª carried by bonnet or

page_text: cover 8. The chamber of bonnet 8 and opening or way 3", above opening 11ª,
are of sufficient length to receive the gate valve and its parts within them, so that
valve 5 can be closed between said gate valve and chamber 3 of casing 2.
When the gate valve is to be used with the main casing, the shape of bonnet 8
can be altered, if desired, as shown in Figures 12, 16 and 17, and the bearings and
stuffing boxes on said bonnet can also be altered, as shown in said figures, and
wheel or handle 38 can be held on shaft 30 by a collar 38, to enable shaft 30 to be
raised or lowered by hand. Furthermore, one bonnet, having bearings 30", 20",
and their stuffing boxes, can be used for operating the cutting machine, and for
permanent use with the screw 44, as in Figures 16 and 17, in which case bear-
ing 26 will be plugged when screw 44 is set in place. Or, the bonnet just
mentioned can be used for operating the cutting machine, and then a different
bonnet, having a single opening 30" and its stuffing box, can be used with
screw 44, and the gates or disks 42, 43, as a permanent bonnet. In either case
the result is the same.
When casing 2 is to be used with the valve gates or disks the side branches or
ways, shown in Figure 2, may be dispensed with, but if preferred one or more
outlets or ways 77 may be provided to which a pipe 78 or a valve may be connected
(see Figure 17). 79 is a cock connected with casing 2 by which bonnet 8 can be
drained.
In connecting the casing and its valve-gates or disks with pipe 1, the pipe
cutting machine and casing are connected with the pipe, and the bonnet and shafts
connected as before described, and when the section of pipe is cut out the cutting
machine and attached section of pipe are raised above valve 5, and the latter is
moved to close outlet 3ª. The valve-gates 42, 43, with block 57 attached, are next
placed upon valve 5, in opening 3ª, screw 44 is then adjusted in its bearing in
bonnet S and connected with lifter 53, and the bonnet is secured upon the casing.
Valve 5 is next withdrawn and the gates are in position to be lowered between the
severed ends of pipe 1, to shut off the flow when desired. Thus a valve can be
inserted in a line of pipe without stopping the flow or fluid therethrough. If
desired the casing or chamber of valve 5 can be next removed (first shutting off
the flow through pipe 1 by gates 42, 43,) and plate 11b secured over opening 11°
so that valve 5 and its chamber can be used with other casings.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is:-
1. The combination of a divided frame or ring having two parallel annular
guide-ways and means to clamp said frame upon a pipe, with two divided cutter-
carriers or rings mounted upon and adapted to travel around said guide-ways and
having gear-teeth respectively projecting toward each other, means for clamping
said cutter-carriers or rings around said guide-ways, means for supporting tools
on each of said carriers or rings and for feeding said tools independently, a pinion
er gear-wheel located between said cutter-carriers and meshing with the gears
carried by both of said cutter-carriers, a shaft carrying said pinion, a gear wheel
to rotate said shaft, a pinion or gear-wheel to operate said wheel, and a shaft for
operating said pinion or gear-wheel.
2. The combination of a casing adapted to be clamped around a pipe and having
a chamber to receive a pipe-cutting machine, said casing having a stuffing box
or bearing, with a pipe-cutter adapted to be clamped around a pipe within the
chamber of the casing, and a shaft journaled in said stuffing-box or bearing and
connected with said pipe cutter, and means for sustaining the pipe cutter when
the pipe is cut through.
3. The combination of a casing adapted to be clamped around a pipe and having
a chamber to receive a pipe cutting machine, said casing having stuffing boxes or
bearings, with a pipe cutter adapted to be clamped around the pipe within the

page_text: chamber of said casing, said pipe cutter having two parallel shafts or rods that
project through said stuffing-boxes or bearings, and serve to keep the pipe-cutter
from twisting within the casing.
4. A casing or ranch adapted to be fastened upon a pipe and having a chamber
adapted to surround the pipe, which chamber is greater radially than
the pipe to be surrounded SO as to receive a pipe-cutting machine
within it, whereby a tool can travel around said pipe within the.
casing, said casing or branch having an opening leading to said chamber for
the passage of the pipe cutting machine, a valve seat and a valve to close said
opening, said casing or branch also having an opening and a hub leading from
said chamber.
5. A divided or split casing or branch adapted to be fastened upon a pipe and
having a chamber adapted to surround the pipe and that is greater radially than
the pipe to be surrounded to receive a pipe-cutting machine within it whereby a
tool can travel around the pipe, said casing or branch having an opening leading
to said chamber for the passage of a pipe cutting machine, a valve-seat surround-
ing said opening, said casing or branch also having plurality of openings leading
to said chamber, and hubs extending from said openings.
6. The combination of a divided or split casing or branch adapted to be clamped
upon a pipe and having a chamber adapted to surround a pipe and that is greater
radially than the pipe to be surrounded and adapted to receive a pipe-cutting
machine within it, said casing or branch having an opening leading to .said
chamber for the passage of a pipe cutting machine, a valve-seat surrounding said
opening, a valve to close against said seat, and a removable bonnet or cover
adapted to be fastened to said casing or branch in line with said opening, the
interior of said bonnet or cover constituting a prolongation of the chamber of
said casing, said chamber and bonnet or cover being adapted to permit the passage
of a pipe cutting machine, said casing or branch also having an opening and a
hub leading from said chamber.
a
7. The combination of a divided or split casing or branch adapted to be
clamped upon a pipe and having a chamber adapted to surround
pipe and that is greater radially than the pipe to be surrounded to receive
a pipe cutting machine within it, said branch or casing having an opening leading
to said chamber for the passage of a pipe cutting machine, a valve seat surrounding
said opening, a valve to close against said seat, a removable bonnet or cover
adapted to be fastened to said branch or casing in line with said opening and also
adapted to permit the passage of a pine-cutting machine, and a stuffing box or
bearing carried by said bonnet or cover to receive the driving shaft of a pipe-
cutter, said casing or branch also having a plurality of openings leading to said
chamber, and hubs extending from said openings.
8. A divided or split branch or casing adapted to be clamped upon a pipe and
having a chamber adapted to surround a pipe and that is greater radially than the
pipe to be surrounded, said branch or casing having an opening leading to said
chamber, a valve seat surrounding said opening, a valve to close against said seat,
a removable bonnet or cover adapted to be fastened to said branch or casing in line
with said opening, the interior of said bonnet or cover constituting a prolongation
of the chamber of said branch or casing, and a stuffing box carried by said bonnet
er cover, combined with a pipe cutter adapted to carry a tool around the pipe
within said chamber, and also adapted to travel within said chamber and the
bonnet or cover, and a shaft to pass through said stuffing box to operate said pipe
cutter, and means to sustain said shaft and the pipe cutter when the pipe is cut
through.
9. A divided or split branch or casing adapted to be clamped upon a pipe and
having a chamber adapted to surround the pipe and that is greater radialty thau
the pipe to be surrounded to receive a pipe-cutter, said branch or casing having an
opening leading to said chamber, a valve seat and a valve to close said opening,
a removable bonnet or cover adapted to be fastened to said branch or casing in

page_text: line with said opening, the interior of said bonnet or cover constituting a pro-
longation of the chamber of said casing, stuffing boxes or bearings carried by said
bonnet or cover, and two shafts or rods to pass through said stuffing boxes or bear-
ings, combined with a pipe cutter adapted to be operated within said chamber of
said casing and arranged to connect with said shafts or rods, said shafts or rods
serving to keep the pipe-cutter from twisting within the casing.
10. The combination of a divided or split casing adapted to be clamped around
a pipe and having a chamber to surround the pipe and an opening leading to said
chamber, with a valve and valve-seat, a removable bonnet or cover having c
stuffing box, a pipe cutter adapted to travel within said chamber and bonnet or
cover, a tube or shaft projecting from said pipe cutter, a threaded rod extending
therefrom, a tube to surround said threaded rod, and a threaded wheel or handle
to operate on said threaded rod and said tube to raise the pipe cutter.
11. The combination of a branch or casing having a chamber to surround a pipe
to receive a pipe cutting machine within it, and an opening leading thereto, a
valve-seat and a flange surrounding said seat, with a removable bonnet or cover
having a stuffing box or bearing, and a flange to connect with the flange on the
branch or casing, and a valve to close against said seat, and with a pipe cutting
machine, a shaft or rod to project therefrom through said stuffing box or bearing,
and means connected with said shaft or rod to sustain the latter and the pipe
cutting machine when the pipe is cut through.
12. The combination of a divided or split branch or casing having a chamber
and an opening leading thereto, a valve-seat and a flange surrounding said seat,
with a removable bonnet or cover having a flange to connect with the flange on
the branch or casing, a valve having a threaded bore, and a screw adapted to enter
said bore to sustain said valve.
13. The combination of a divided or split branch or casing having a chamber and
an opening leading thereto, a valve-seat and a flange surrounding said seat, with
a removable bonnet or cover having a flange to connect with the flange on the
branch or casing, a valve having a threaded bore, and a screw adapted to meshi
with the thread's in said bore, and carried by the bonnet or casing, said screw
being arranged to suspend the valve in an upright position outside of the seat and
above the surface of the subtended metal.
14. A divided or split valve casing adapted to be clamped around a pipe and
having a chamber adapted to receive a pipe cutter, and a divided or split valve
seat also adapted to surround a pipe, and a valve adapted to close against said seat,
and means to permit the withdrawal of a pipe-cutter from said chamber without
allowing a flow of fluid from the casing.
15. A divided or split valve casing adapted to be clamped around a pire and
having a chamber adapted to receive a pipe cutter, and divided or split valve seats
also adanted to be clamped around the pipe, combined with a gate valve adapted
to close against said seats, and means to permit the withdrawal of a pipe cutter
from said chamber without allowing a flow of fluid from the casing.
16. A divided valve casing having a divided valve seat and a chamber adapted
to receive a pipe cutter to operate therein around a pipe, a removable bonnet or
cover carried by said casing communicating with said chamber, and a valve for
closing off said casing between its chamber and the bonnet or cover.
17. A divided valve casing having a divided valve seat and a chamber adapted
to receive a pipe cutter to operate therein upon a pipe, a removable
bonnet or cover carried by said casing communicating with said chamber,
a housing carried by said casing and communicating with said chamber,
a valve carried in said housing, and means to operate said valve to close said
chamber.
18. The combination of a divided valve casing adapted to be clamped around a
pipe, and having a divided valve seat and a chamber to surround the pipe, an
extension carried by said casing and having an opening or way leading to said
chamber and means to close said opening, with a bonnet or cover adapted to be

page_text: connected with said extension, and means to cut a portion out of a pipe while
within said chamber.
19. The combination of a divided valve casing adapted to be clamped around a
pipe and having a divided valve seat and a chamber to surround the
pipe, an extension carried by said casing and having an opening or way leading
to said chamber, and means to close said opening, with a bonnet or cover adapted
to be connected with said extension, said bonnet or cover having a stuffing box,
a pipe cutting machine adapted to operate within the chamber of said casing, and
a shaft to pass through said stuffing box to operate said cutting machine.
20. The combination of a divided valve casing having a chamber and an
opening leading thereto, and divided valve seats, and means to close said opening,
with a removable bonnet or cover having a stuffing box and adapted to be connected
with said casing, a screw journaled in said stuffing box, and a gate valve to be
operated by said screw.
21. The combination of a divided valve casing having a chamber and an opening
leading thereto, and divided valve seats, a hollow extension carried by said casing,
a valve connected with said extension to close the opening therein, a removable
bonnet connected with said extension, a stuffing box or bearing carried by said
bonnet, a gate valve and a screw journaled in said stuffing box or bearing.
22. The combination of a divided valve casing having a chamber and an
opening leading thereto, and a divided valve seat, a hollow extension carried by
said casing, a valve connected therewith, a removable bonnet or cover having a
stuffing box, a pipe cutting machine, and a shaft journaled in said stuffing box to
operate said machine.
071
T1
1005
ALLISON BROS.,
Agents for the Applicant.