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Патент USA US2106692

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Jan. 25, 1938.
2,106,692
R. EMBLETON
GAS-ARC TORCH
Filed July 22, 1956
2 Sheets-Sheet l
Inventcn":
Rowland Em letom
by
361M754!
' H is Attorney.
Jan. 25, 1938.
2,106,692
R. EMBLETQN
GAS-ARC TORCH
Filed July 22, 1936
2 Sheéts-Sheet 2
40
42
43
Inventor“.
Rowland Em labor
by
His Attovney.
Fstsntecl Jan. 25, 1933
‘
2,106,692
iJNiTED STATES PATENT OFFICE
2,106,692
GAS-ARC TORCH
Rowland Embleton. Swinton, England, assignor
to General Electric Company, a corporation of
New York
Application July 22, 1988, Serial No. 92,034
In Great Britain July 26, 1985
5 Claims.
(Cl. 219-14)
My invention relates to_gas-arc torches and ll through conductors H- electrically attached
more particularly to multi-?ame gas-arc torches
embodying a plurality of pairs of electrodes.
As pointed out in the United States Letters
Patent 1,946,305, James T. Catlett, February 6,
1934, a stable arc may be produced between con-v
vergent electrodes by laterally displacing their
arcing terminals so that the electrodes are moved
from a common plane into two diiferent planes.
It is frequently desirable to place a plurality of
arcs closely adjacent one another to obtain a
combined heating eii'ect particularly suited for
certain kinds of welding and an independent ad
justment of the several pairs of electrodes be
15 comes di?icult and leads to structural complica
tions.
'
It is an object o1r my invention to‘ provide a
multi-iiame gas-arc torch embodying a plurality
of pairs of electrodes arranged in two rows with
the electrodes of each pair occupying corre
sponding positions in said rows and with their
arcing terminals adjacent an elongated opening
in the nozzle of the torch.
It is a further object of my invention to pro
vide means for collectively moving the electrodes
of one of said rows of electrodes relative to the
other of said rows of electrodes and for simul
thereto.
-
_
Each block I2 is connected to a feed screw l5
and the feed screws of a pair of electrodes are
operated simultaneously by a feed motor l8 whose 5
speed may be constant or controlled automati
cally in accordance with a characteristic of the
are maintained between the electrodes. The feed
motors it are offset relative to one another and
the feed motor for any pair or electrodes rotates 10
a cross shaft l'l through a speed reducing gear
ing it. These cross shafts are provided at their
ends with bevel gears l9, each of which engages
a bevel gear 20 forming a part of the feeding
mechanisms for the screws [5.
15
The bevel wheels 20 are mounted on external
sleeves 2| and are caused resiliently to bear
against intermediate collars on these sleeves
through the agency of helical springs interposed
between these gears and knurled collars 22 on 20
these sleeves.
Split- nuts encircling the feed
screws ii are attached to and rotated by the
sleeves 2|. With this arrangement the feed
screws l5 may be fed by the motors it to move
the blocks l2 and feed the electrodes l0 attached 25
thereto. The friction clutches constituted by
the spring pressed gears 20 and the intermediate
taneously laterally displacing the arcing termi
collars on the external sleeves 2i afford the re‘
nals of said electrodes relatively to one another.
Further objects of my invention will become
apparent from a consideration of the following
description taken in connection with the accom
panying drawings and its scope will be pointed
out in the appended claims.
In the drawings Figs. 1 and 2 are side and end
views of a multi-i‘lame gas-arc torch embodying
my invention and Figs. 3, 4, and 5 are respectively
plan, side sectional, and end sectional views of
its nozzle construction. Fig. 4 is a section along
quired slip for manual adjustment which may
be made by rotating the sleeves 2| independently 30
of the motor drive through the agency of their
knurled collars 22.
.
The split nuts encircling the feed screws I! are
recessed at their upper ends to receive the rec
tangular collared ends of sleeves 23 located within 35
sleeves 22. The sleeves 23 loosely ride upon the
feed screws l5 and are provided with knurled
of Fig- 3.
In the embodiment illustrated in the draw
ings six pairs of electrodes iii are mounted in
portions 24 so that by manually rotating these
sleeves the split nuts attached to sleeves 2| may
be disengaged from the feed screws ii for mak- 40
ing quick adjustments of the feed screws and their
attached electrodes. The split nuts are normally
held in engagement with the feed screws I! by
two rows with the electrodes of a pair occupy
peripherally disposed springs.
40 4-4 of Fig. 3, and Fig. 5 is a section along 5-!
45 ing corresponding positions in these rows. Each
electrode is secured by a clamp H to a block l2
arranged to slide upon one or more guide rods
it. To facilitate certain adjustments, the blocks
12 are prefer-ably maintained in frictional en
gagement with their associated guide rods by
spring means or the like. The clamps ll may be
' insulated from the blocks I2 so that the feeding
The individual feed units of the torch are 45
mounted in pairs on a frame which is supported
on a spindle 25 and the torch as a unit may be
rotated about this spindle through the agency
of a hand wheel 28 mounted on an arm 21 and
connected to the spindle through gears 28. The 50
spindle 25 is supported by two arms 21 which are
in turn pivotally supported at 28 on brackets 30
forming a support for the torch as a whole. A
hand wheel 3| operates a mechanism which reacts
mechanism, of which the blocks l2 form a part
may be maintained at ground potential when the
torch is in use. Current is supplied to the clamps ‘ on the support for brackets 38 to move the arms 55
l
2
21 and the torch about their pivotal support 23.
The two adjustments thus obtained by operation
of hand wheels 26 and 3| provide vertical and
horizontal adjustments of the nozzle 01' the torch
into which the electrodes II! project. These ad
justments make it possible for an operator to
properly locate the nozzle of the torch over the
work 3 which may be a pipe having a longitudinal
seam to be welded.
10
Referring to Figs. 3, 4, and 5 which show in
detail the construction of this nozzle, it will be
noted that each of the electrodes It extends
through a closely ?tting bushing 3 of insulating
and arc-resisting material, such for instance as
15 steatite, and that these bushings have cylindrical
gas from the annular chamber 33. The size and
arrangement of the V-notches are conveniently
adjusted so as to provide a uniform film like flow
of gas into the hollow inner portion of the nozzle
around its whole periphery. This will insure an
even flow of gas through the discharge opening of
the nozzle and across the arcing terminals of the
electrodes. The ?ow of gas is indicated by ar
rows in Figs. 3, 4, and 5.
The nozzle body 35 and the nozzle tip 36 may
be provided with channels 40 and ‘I through
which a cooling ?uid may be circulated in the
wall structure of the nozzle. Conduits 42 are
employed for supplying the cooling ?uid to these
channels.
end portions and ball-shaped intermediate por
tions. These bushings extend through bores or
openings in two mounting plates 33, forming a
the nozzle may advantageously be made of cop
part of the nozzle structure. The bores in these
20 plates are shaped to correspond with the inter
thereto of small ferrous particles which are pro
'25
The nozzle tip as well as the other portions of
per or a similar material to avoid the adherence
jected from the molten pool of welding metal
mediate ball-shaped portions of the electrode
during welding.
bushings so as to form substantially gas-tight
seatings therefor. These bushings are adjustably
supported in the mounting plates 33 by'clamping
The nozzle above described forms a closure at
the small end of a funnel-shaped housing 43
which encloses the electrodes and the feeding
plates 34 provided with bores also shaped to con
form with the curvature oi the intermediate por
tions of the bushings, thereby providing another
seating cooperating with the seating provided by
mechanisms therefor. The feed motors It may 25
likewise be enclosed by a housing 44. The hous
ing 43 may be provided with removable side wall
portions which close openings therein through
the mounting plates 33 for rigidly holding the
30 bushings and therewith the electrodes in adjusted
positions relative to one another in two rows
with the electrodes of each pair occupying corre
sponding positions in said rows. The mounting
plates 33 in the construction illustrated form
35 part of the wall structure of the nozzle and are
clamped against the top surface of a hollow mem
which the operator may obtain access to the
electrode clamps for the removal and insertion of 30.
electrodes.
So long as the arcing terminals of the elec
trodes are located adjacent the tip of the nozzle,
the nozzle construction may be variously modi~
fled. It will, consequently, be apparent that a
nozzle having openings adjacent which the ter
ber 35 constituting the body portion of the nozzle. ' minals of each pair of electrodes are located may
A tip 36 is also attached to the body portion of be employed, instead of the nozzle with a single
the nozzle on its bottom surface opposite the elongated discharge opening above described,
40 clamping plates, the arrangement being such that without in any way departing from the spirit of
the arcing terminals of the electrodes are located my invention. The arcing terminals of the elec
adjacent the elongated opening in this tip.
trodes may likewise be located within the nozzle
The mounting plates 33 and their associated or project a slight amount therefrom so long as
clamping plates 34 are provided with openings they are adjacent the opening or openings in the
45
of sumcient clearance with regard to the clamp
ing bolts 31 by which they are attached to the
body portion 01' the nozzle, to permit the desired
relative lengthwise adjustment of these plates to
secure a simultaneous collective adjustment of
the o?set of the arcing terminals of the elec
trodes.
A suitable mechanical movement, con
nected to the mounting plates or to these plates
and the body portions of the nozzle, may be pro
vided to facilitate this adjustment of the plates
55 relative to one another. Suitable markings on
the plates or on the plates or nozzle body may be
provided to indicate the amount of displacement
of the arcing terminals of the electrodes result
ing from the relative adjustment of the mounting
What I claim as new and desire to secure by
Letters Patent of the United States is:
1. A gas-arc torch comprising a nozzle having
an elongated discharge opening therein, a plu
45
rality of pairs of electrodes projecting into said
nozzle with their arcing terminals adjacent the
elongated opening therein, said electrodes being
arranged in two rows with the electrodes of each
pair occupying corresponding positions in said
rows, and means for collectively moving the elec
trodes of one of said rows relatively, to the elec
trodes of the other of said rows and for simul
taneously laterally displacing the arcing ter
minals of said electrodes relatively to one an
The body portion 35 of thevnozzle is formed
along that face against which the mounting
other along the elongated opening in said nozzle,
said means including relatively movable mount 60
ing plates each of which has openings therein
plates are clamped with a recess 33 which ex
for the electrodes of one of said rows of electrodes.
tends all around the nozzle body, thereby pro
2. A gas-arc torch comprising a nozzle having
an elongated discharge opening therein, a plu
rality oi’ pairs of electrodes arranged in two rows
with the electrodes of each pair occupying corre
plates 33. v
viding an annular chamber extending all around
the nozzle body. Means including a conduit 33'
are provided for supplying a gas such as hydro
gen through a bore in the body portion of the
nozzle to this annular chamber. Interposed be
70
nozzle through which the gas is discharged.
40
tween the mounting plates 33 and the body por
tion 35 of the torch, there is an annular packing
ring or washer 39 which is cut away at its inner
periphery to form V-shaped notches which pro
vide spaces between the clamping plates and
body portion of the nozzle for the discharge of
sponding positions in said rows and with their
arcing terminals adjacent the elongated opening
in said nozzle, means for collectively moving the
electrodes of one of said rows relatively to the. 70
electrodes of the other of said rows and for si
multaneously laterally displacing the arcing ter
minals of said electrodes relatively to one another
along the elongated opening in said nozzle, said 75
2,106,692
means including relatively movable mounting
plates each of which has openings therein for the
electrodes of one of said rows of electrodes, and
means for producing an even flow of gas through
the discharge opening in said nozzle across the
arcing terminals of said electrodes.
3. A gas-arc torch comprising a nczzlehaving
'
3
tip, bushings of insulating and arc-resisting ma
terial surrounding said electrodes and adjustably
mounted in the openings in said mounting plates,
a washer having V-shaped notches along its inner
periphery and located between said mounting
plates and the body portion. of said nozzle, and
means for supplying gas to said nozzle through
an elongated discharge opening therein, a plu
rality of pairs of electrodes arranged in two rows
said V-shapeci notches in said washer.
5. A gas~arc torch comprising a nozzle having
with the electrodes of each pair occupying corre
sponding positions in said rows and with their
discharge opening therein, a plurality of pairs of
a hollow body portion and a tip with an elongated 10
arcing terminals adjacent the elongated opening
electrodes arranged in'two rows with the elec
in said nozzle, means for collectively moving the
ture of said nozzle and has openings therein for
trodes of each pair occupying corresponding po
sitions in said rows and with their arcing termi
nals adjacent the elongated opening of said nozzle 15
tip, means for collectively moving the electrodes
of one of said rows relatively to the electrodes of
the other of said rows and for simultaneously
laterally displacing the arcing terminals of said
electrodes relatively to one another along the 20
elongated opening in said nozzle tip, said means
the electrodes of one of said rows ‘of electrodes,
including relatively movable mounting plates
‘and bushings of insulating and arc-resisting ma
terial surrounding said electrodes and adjustably
mounted in the openings in said mounting plates.v
4. A gas~arc torch comprising a nozzle having
a hollow body portion and a tip with an elongated
discharge opening therein, a plurality of pairs of
placed edge-to-edge on the body portion of said '
electrodes of one of said rows relatively to the
electrodes of the other of said rows and for simul
taneously laterally displacing the arcing termi
nals of said electrodes relatively to one another
along the elongated opening in said nozzle, said
means including relatively movable mounting
plates each of which forms part of the wall struc~
electrodes arranged in two rows with the elec
trodes of each pair occupying corresponding po
sitions in said rows and with their arcing termi
nals adjacent the elongated opening of said nozzle
tip, means for collectively moving the electrodes
nozzle opposite said nozzle tip, bushings of insu
lating and arc-resisting material surrounding 25
said electrodes and having intermediate portions
adjustably mounted in the openings in said
mounting plates, means for clamping said bush
ings in adjusted positions in said mounting plate
and for clamping said mounting plates to the 30
body portion of said nozzle in ‘adjusted positions
relative to one another, a washer having V
shaped notches along its inner periphery and lo
cated between said mounting plates and the body
the other of said rows and for simultaneously , portion of said nozzle, means for supplying gas 35
laterally displacing the arcing terminals of said to said nozzle through said V-shaped notches in
electrodes along the elongated opening in said said washer, and means for circulating a cooling
nozzle tip, said means including relatively mov
?uid through the wall structure of said nozzle.
of one of said rows relatively to the electrodes of
40
able mounting plates placed edge-to-edge on the
body portion of said nozzle opposite said nozzle
ROWLAND EMBLETON.
40
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