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Oct l', 1946.
l Filedl Sept. 4, 1943
7W: 95
37 /
i2 Z6
P05551?. Howard.
,Oct l, 1946.r
Filed sept. 4,
' 95'
,0g2 sheets-sheet
Í "Y
7o 7/
Patented Oct. 1, 1946
Posy A. Howard, Tulsa, Okla., assignor of one-half ¿
C. A. Mathey and onc-'half to C. B. Harter, `
1 Tulsa, Okla.
`Application September 4, 1943, Serial No. 501,271
'2 Claims. (Cl. 33-21)
>6 is> an end elevation ofthe pipecutting
I .
- This invention relates to pipe cutting appa
ratus »and more particularly to a pipe cutting
apparatus for effecting selected cuts in the wall
apparatus.v .
of a pipe, and has for its principal object to vpro
vide for supporting a cutting device for circum
ferential movement about the periphery of a pipe
of the torch, said templet being for saddle kcuts
Fig. '1 is a detail perspectiveview- of one form
of >templet__ for controlling longitudinal movement
or the like.
Fig. 8 is an enlarged «detail section through the
While controlling longitudinal movement of said
ring gear and shank members on the line 8-78,
ycutting device relative 19e-said pipe.
>Other objects of the invention are to provide a
Referring more in detail to the drawings:
longitudinally reciprccable cutting device mount
I- designates a pipe ycutting apparatus embody
>ing the features ci the present invention and
ing on guidesv rotatable around a pipe to beA cut;
to provide for controlling longitudinal movement
which includes a saddle member 2 adapted to
of said cuttingV device for effecting selected cuts
engage over theupper portion of a pipe 3 for
in the pipe; to provide a guide for moving a cut
supporting a cutting torch 4 for planetary move
ting torch longitudinally of the pipe during cir 15 ment about said pipe. The saddle member 2 in
cludes a semi-cylindrical body 5 having laterally
cumferential movement `of said torch about the
pipe for effecting cuts in said pipe in the shape
extending end flanges 6 and 1 connected by longi
of said guide; to provide.- for moving a cutting
tudinal ribs 8, 9 and I0 on the respective sides of
torch relative to a pipe to be cut for cutting
openings I I for lightening the weight of the cast
shapes such Vas saddles, degrees, et cetera, in the
ing and facilitating its application to the pipe.
nature of fabricating pipe; t0 provider a templet
In order to support the saddle on the pipe, the
for the desiredfcutaround the pipe having ra
body portion carries feet I2 for spacing the axis
guide for engagement by a follower 'mechanism
of thesaddle concentrically 'with the axis of the
controlling movement of the'torch; to provide vfor
pipe, said feet preferably being> adjustable to
holding the templet in fixed relation to the pipe;V
adapt the sadle to nt various diameters of pipe. Y
to provide for ready application and adjustment `
, Depending from the side ribs 8 .and ID, adjacent
of apparatus of this character to a pipe; to pro
the endsthereof, are pairs of spaced ears I3 land
vide -for accurately supporting .the .torch for
I4, vcarrying cross pins I5 for securing the ends'of
planetary movement vabout the pipe;jtor provide 30 flexible retaining members or cinches I8 and I1,
an apparatus. of this character readily adapted
which engage underthe pipes to which the saddle>
for mounting on various diameters of pipe and Y
is applied, saidfretaining members preferably in
cluding chain sections AI8 connected tol the pins
to provide a convenient, economical and eflicient
pipe cutting apparatus of the character and for
the purpose noted.
. In accomplishing these and other objects of the
invention, 1I have provided improved details of
structure, the preferred form of'which is illus
trated in the accompanying drawings, wherein:
Fig. l is aperspective view of a pipe Ícutting
apparatus embodying the features of the present
. I5 atjone side of the saddle and their other ends
connected by means
of coil springs I9 and toggle
levers 2%. The springs accommodatethe length
of the'ñexible members to diiîerent diameters of
pipe and the toggle levers stretchvthe springs to
retain the retaining'members in engagement` with
40 the pins I5.
Fixed to the end of the end'ñange 1 of the
saddle is a segmental ring 2|, having an annular
inset shoulder 22 to forman annular seat 23 and
paratus particularly showing the engagement of
a radial flange 24 which cooperates with anfin
~ the` followerY with the templet for controlling 45 Wardly extending flange 25 and a keeper ringZß
. Fig. 2 is a side elevation of a pipe cutting ap
movement of the torch.
to> form an vannular Atrack vor'groove 21 of L
Fig.'3 is a plan’ view of a pipe cutting appa
shaped ycross-section. The ring» 2l and the keeper
ring 26 Aare secured in concentric and axial align
ratus, portions of the torch mounting guidebeing
v broken away to better _illustrate the mechanismy
ment with - the saddle by bolts 28 extending
for controlling >longitudinal movement of the .
torch relatively to the pipe.
, .
Fig. 4 is an enlarged detail section through the
torch mounting guide on the line 4-4, Fig. 3.
Fig. 5 is an enlarged detail section through the
`torch mounting guide on the line 5-5, Fig. k3.
through openings?zll on the ñange 1 and through
aligning openings 3i) and 3l in the respective ring
members. yThe endsof the ring> members 2l fare
formed on lines tangent to the inner diameter
of _the saddle ‘2 asbest ‘illustrated in Fig. 6'to
form a slotted throat 32 to pass the pipe 3 when
the saddle is placed thereon.
in angular adjusted position by means of a set
screw 84. The torch carrying member 55 is pref
Rotatably mounted in the L-shaped groove 21
erably provided with a bore 65 substantially of
is a ring gear 33 having an inner diameter adapt
same shape as the cutting torch barrel, the
ed to engage the seat 23 and an inwardly ex
tending flange 34 interlocking with the ñange 25 Cil lower end of the bore 65 being curved, as at 66,
to provide a seat for said cutting torch and
0f the keeper ring 25 whereby the ring gear is
permit the nozzle end 61 of said torch to be pro
retained in guided relation with the track mem
jected through the bore and in close proximity
«ber for rotation about the axis of the pipe, as
to the pipe to be cut.
later described.
Projecting outwardly from the side of the car
The ends 35 and 35 of the ring gear segment
riage 41 and through the openings 50 are ears
are spaced apart in conformity to the width of
63 adapted to receive one end of springs 69, hav
the throat 32 as illustrated in Fig. 6, the length
ing their opposite ends attached to lugs 10 on
of the ring gear segment being such that when
bars 1| secured to the sides of the pairs of ver
one end thereof is moving across the throat the
tically spaced angles forming the arm 31 whereby
other end is retained in guiding relation with
spring tension is applied to the carriage 41 to
the track member to assure that the opposite end
draw same toward the gear. The end of the car
is moving in alignment to re-enter the opposite
riage 41 adjacent the ring gear is preferably pro
end of the track member and due to the fact that
the ends are always spaced apart less distance 20 vided with an extension 12 on which is mounted
an upwardly extending collar 13 having a bore
than the inner diameter of the track, the ring
14 therethrough for Aslidably receiving a shank
will be retained thereon in all positions about
15 of a follower 16, the lower end of said follower
the periphery of the ring.
being provided with a roller 11 adapted to be in
' Fixed to the segmental ring gear, midway the
substantial engagement with the pipe to be cut
ends thereof, is an arm 31 for mounting the cut
ting torch 4.
The arm includes a bracket 33 se
cured to the ring gear by suitable fastening means
such as screws 39.
Mounted on the bracket 38
and extending longitudinally of the pipe on the
and held in >such position by means of a set
screw 18 threaded into a boss 19 on the collar
13. ’I'he roller 11 preferably is provided with a
flange 89 adapted to ride on the outer surface
8| of a templet 82 having a guide edge 83 adapt
ed to he engaged by the roller 11 to move the
torch longitudinally of the pipe as it is moved
circumferentially thereof to provide a cut in said
opposite side of the ring gear 33 to the saddle
2 are pairs of vertically spaced angles 49-4l
and 42-43, said pairs of angles having upper and
lower inwardly directed flanges 44 and 45 which
pipe corresponding tothe shape of the templet.
cooperate to form tracks for engagement of roll
A spring 84 preferably is provided around the
ers 45 on a torch supporting carriage 41, later
shank 15 of the follower having one end engaged
described. The respective pairs of angles are
with the roller and the other end with the car
spaced horizontally as at 48 to provide an open
riage 41 to normally hold the roller in. engage
ing through which the torch is projected and
ment -with the templet 82.
the outer ends of the angles being preferably
The templet is preferably formed of two semi
connected by a plate 49 to support the ends there 40
circular sections 84 and 85 hinged together, as
of and form a rigid arm for carrying the cut
at 85, whereby the sections may be hinged apart
ting torch. The vertical spacing of the angles
to permit application of said templet around the
4i), 4| and 42, 43 provide slots 59 in the sides of
pipe 3, the open ends ofthe respective portions
the arm for accomodating outwardly dirccted
of the templet being held together by means of
portions of the carriage 31, as later described.
a screw 81 swivelly mounted in bosses 88, pref
The rollers 4S are preferably rotatably mount
erably on the lower portion 85 of the templet,
ed on posts 5| extending through openings 52 in
said screw being adapted to project through a
the carriage member 41 and are hfld in adjusted
slotted opening 89 in an ear 99 on the upper
position vby means of set-screws 53,` a pair of the
posts 5| preferably extending upwardly above the - portion S4 of the templet and adapted to receive
a wing-nut 9| for drawing the open ends of the
carriage 41 at each side thereof and a pair pref
templet together and holding same.
erably extending below the carriage at each side
_ In order to support the templet from the sad
thereof to provide two rollers 46 on each side of
dle 2 and hold said templet against rotation rela
the carriage engaging the lower flanges 45 of the
tive to the pipe, the upper portion 84 is prefer
arm and two rollers engaging the upper flanges
ably provided with an outwardly extending ear
44 on each side of the carriage, whereby said
92 having an aperture 93 therein, through which
carriage may be supported for free rolling move
a bolt 94 may be extended to secure said templet
ment throughout the length of the arm but heldv
to the rings 26 and 2| and saddle 2, said bolt 94
against vertical or lateral movement relative
passing through the respective plates in the same
manner as the bolts 28.
Arranged in the carriage l41 and centrally 1o
right angles to the
cated relative to the laterally spaced angles of
ring gear segments and the follower roller 11 held
the arms is an opening 54 adapted to receive a
in engagement withthe templet face 8| by means
torch supporting member 55, preferably including
of the spring 59 so that when the ring gear seg
an upwardly extending collar` 55 slotted as at 51
ment is rotated about the track, the pipe is cut by
and provided with bosses 58 to receive an adjust
the flame from the nozzle of the cutting torch as
ing screw 59 for tightening the collar 55 about
itis revolved around the pipe and simultaneously
the barrel 60 on the torch. The torch support
moved longitudinally thereof in accordance with
ing member 55 is preferably provided with trun
the curvature of the guiding edge 83 of the tem
nions 6| and 62 adapted to be mounted in bear m plet.
ings 63 on the carriage whereby the cutting torch
, In order to rotate the ring gear segment, the
is supported for angular adjustment relative to a
ñange 1 is provided with radial brackets 95 and
transverse plane through the pipe to permit a
36, spaced apart a greater distance than the spac
beveled edge to be formed on the cut edge of the
between the ends of the ring gear and rotat
pipe, said torch supporting member being held
“ ably mounted therein are shafts 91 and 88 car
rying pinions QS-l Gü meshing with the ring gear,
and sprockets ||J| and |92 that are operatively
connected by a chain belt |53. One of the shafts
is provided with a gear |64 which is driven by a
pinion gear m5 iixedon a shaft |06 rotatably
mounted in a bracket extension |01, the shaft |96
being manually rotated by means of a crank or
the like |63. It is apparent that when the crank
|08 is rotated the gear |05 drives the gear H14 to
arm 3l. The iiame from the cutting torches
burns through the wall of the pipe so that when
said torch has made one complete revolution
about the pipe the proper cut has been made
thereon. After the cut has been made the ring
gear is moved so that the ends thereof align
with the _sides of the throat in the track. The
nut 8| is loosened to permit hinging of the lower
portion of the templet away from the pipe and
the toggle levers 3i! are released to permit re
eiîect rotation of the pinion 99 and the pinion IED 10 moval of the retaining members |55 and |'| from
through the sprocket and chain connection. Ro
engagement with the saddle whereby the saddle
tation of the pinion gears drives the ring gear to
carrying the ring gear, torches and templet is
carry the cutting torch about the periphery of the
lifted from the pipe completing the operation.
pipe to eiîect a cut having an edge depending
From the foregoing it is apparent that I have
upon the angular adjustment of the cutting torch. 15 provided a'cutting apparatus which may be read
Owing to the fact that the ring gear is guidingly
ily attached to a pipe without diassembling the
supported by the track throughout its entire
. ring gear or any part of the apparatus, and that
movement andthe track is securely anchored to
due to the positive mounting of the templet and
the pipe, the out in the pipe formed by the cut
the reciprocal mounting of the torch, the cuts
ting torch will be in a plane at right angles to the
that arev produced in the pipes are smooth and
axis of the pipe except where the templet guid
regular and of the selected shapes for ñtting the
ing edge 83 is so shaped to move said cutting
end of the pipe to other pipes as in pipe fabrica
torch and carriage therefor longitudinally of the
pipe to make a selected cut therein so that the
What I claim and desire to secure by Letters
cut end of the pipe can be abutted against other 25
Patent is:
pipe sections having suitable openings therein
1. In a pipe cutting apparatus, segmental ring
to receive the pipe section on which the selected
and track members having ends spaced apart to
shape is cut.
pass the members over a pipe to be cut, a saddle
The radial brackets 95 and 96 are preferably
supporting the track member, means on the
`braced by a link |09 secured to ears thereon to
saddle having engagement with the pipe for po
provide a sturdy mounting for the gear rotating
sitioning the axis of the track member concen
In using a cutting apparatus constructed and
tric with the axis of the pipe, clamping means Y
for securing the saddle to the pipe, a pair of
assembled as described, the nut 9| is loosened on
driving members supported in ñxed relation to
the screw 81 whereby said screw may be hinged
saddle and having driving contact with the
outwardly away from the ear 90 to permit hing
segmental ring for moving the ring member on
ing of the lower portion of theV templet away from
the track member, means on the ring member
the upper portion thereof which is secured to the
for mounting an instrument for movement lon
saddle 2 and segmental plates 26 and 2|, The
gitudinally of the pipe, a templet about the pipe
retaining members I6 and I1 are then released 40 adapted to ñt against one side of said segmental
from the saddle to permit the saddle and templet
track and provided with a guiding edge, a tem
to be applied to the upper portion of a pipe and
clamped thereon adjacent the point at which the
cut is to be made, the spacing feet having been
adjusted to concentrically align the axis of the
saddle with that of the pipe so that the ring
plet follower operatively engaged with the in
strument and movable toward the pipe, a ñange
on the follower for engagement with the templet
for limiting movement of said follower toward
the pipe, and means for resiliently urging said
templet follower to engage with the templet for
controlling the cut of the pipe in accordance with
gear 33 will be rotated about the axis of the pipe
when the cut is being made. .After the saddle has
been adjusted to the size of the pipe it is not
again necessary to adjust the spacing feet unless 50 the shape of the templet. »
2. In a pipe cutting apparatus, a ring-like
it is desired to cut a pipe of different diameter,
member, means for supporting the driven
however, the templet must be changed according
member for rotation coaxially of a pipe, means
to the particular type of cut, i. e., saddles, bevels,
fixed to the driven member for moving an in
et cetera, that is desired to be made in the pipe.
When the saddle is applied to the pipe, the open 55 strument over the pipe, driving means for the
driven member for rotating the driven member
- ing between the ends of the ring gear will have to
about the axis of the pipe to effect planetation
be aligned with the throat of the track to permit
the instrument moving means, aìcarrier slid
mounting of the saddle on the pipe, but when
able on the instrument moving means longitudi
the ring gear is rotated the ends thereof will move
nally of the axis of the pipe, a templet carried
in guided relation across the throat of the track
by the driven member'supporting means and
and be retained by the track for rotation about
having a guiding edge encircling the pipe coax
the pipe.
ially therewith, a roller movably mounted on the
The angularity of the cutting torch is adjust
carrier for engaging the guiding edge of the
ed in the carriage 41 so the nozzle 5l of said cut
templet, resilient means urging the roller to
ting torch is directed to the proper angle to make
ward the pipe, a ñange on the roller for engag
the desired bevel on the cut. The tension of the
ing the templet for limiting the movement of the
springs B9 holds the follower roller '|'| in engage
roller toward the pipe, and a spring connected
ment with the guiding edge 83 of the templet
with the carrier for urging the carrier in a di
whereby rotation of the crank |08 effects a grad 70 rection to retain said roller in guided engage
ual planetation of the arm 31 about the pipe.
The guiding edge 83 of the templet effects longi
tudinal movement of the carriage 41 on thel roll
ers 46 in the track formed by the angles of the
ment with said guiding edge during planetation
of the instrument moving means.
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