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oct. 29, y1946-.
H. A. JACKSON
.
2,410;164 .
ELEGTRODE HOLDER
Filed Feb. 4, 1944
Hana/Adm‘fd/J
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lNvENToR
BY
`
i
_
ATTORNEYS.
Patented Oct. 29, 1946
" 2,410,164
UNITED l STATES
PATENT o Fries
2,410,164
ELECTRODE HOLDER
l
lionel A. Jackson, Detroit, Mich.
Application February 4, 1944, Serial No. 521,005
5 Claims. (Cl. 219----8)
`2
This invention relates to an electrode holder
and moreiparticularly to an electrode holder for
arc welding.
reenforcement is molded within `the Bakelite
This invention` contemplates an electrode
Insulating cover 2 is provided with a metal
cover.
shield or sheath 5 which surrounds the insulat
ing cover at the head end ofthe holder. Shield 5
holder for arc kWelding which is streamlined and
compact to facilitate welding in close quarters.
It is an object of this invention to produce an
is preferably made of thin sheet brass or alumi
num and serves to protect insulation f2 lagainst
the heat radiated from the arc during Welding
and also serves to protectlthe >insulation against
insulated electrode holder rhaving long lived insu
lation. This‘object is achieved by providing the
insulation with a protecting metal cover which
is insulated from the body and-‘other current con
ducting parts of the holder.
damage in case the head ofthe holderi is struck
or strikes against another object such as might
.
occur when the holder is--dropped Insulating
cover 2 is preferably molded in themetal no_s’e‘ or
It is also an object of this invention toproduce
-a holder having a simple, economical and e?lìcient
shield 5 and has a skirt portion 40 overlapping
handle 6 and which serves as a hand-gripfor
lock -for locking the electrode in the holder.
jIn the drawing:
.
i
>turning the head I to lock Vthe electrode in the
head or release the same therefrom. „The nose
Fig. 1 is a longitudinal section through my
electrode holder -showing the parts in released
portion and hand-grip portion ofthe insulating
position.
Fig. '2 ‘is a fragmentary 'longitudinal section 20 cover 2 preferably are molded `as one integral
piece or unit. Shield Y5 isl circumferentially
along theline ‘2-201e Fig. 6 through my holder
knurled
as at 4I and insulation 2 is molded over
showing the electrode locked in the holder.
the knurled portion as at 42 so as to lock vthe
Figs. 3, 4 and 5. are sections along the lines3-3,
insulatingcover to the shield 5.
_
l
.
4--4 and 5-5 of Fig. 2.
The -metal sheath 5 is provided With an opening
Fig. 6 is an elevation of my electrode holder.
vI2 :surrounding an opening I3 in insulating cover
From the drawing it will be observed-that the
2 .through which thexelectrode isadapted toçbe
holder is shaped like a torpedo. The holder com
passed
-into socket I4 of head I. The insulationrZ
-prises the lfollowing parts: a head I, an 'insulat
is preferablymolded in cover 5 and fills the .open
ing cover 2 Vfor the head, an electrode locking . ing I2 flush with the outside surface of sheath 5.
plunger 3 mounted in'bore 4 in the head, a metal
Insulating cover 2 and sheath 5 are retained on
protecting shield 5 for the insulating cover 2, `an
head I„by a locking pinl I5 which passes through
insulating handle 6 mounted on a metal adapter
openings provided in head I, insulation 2 and
1 which has a threaded fit with the head as at 8,
sheath 5. Pin I5 is arranged to „be driven out of
-a cable 9 secured in the end o'f the adapter 1 and
the rhead and insulation membersl topermit re
moval of the insulating `cover 2 from the head l.
Pin I5 is preferably made from canvas reenforced
in electrically conducting -relation Vtherewith `by
the set screws I0. The electrode is designated I I.
molded plastic such as Bakelite.
Handle 6 is preferably tubular .and retained on
the adapter 'l by means of a vtapered pin |_6 driven
or alloys having 4high electrical conductivity, such
40 into opening .I1 in adapter'l and into openings
as copper, aluminum, and their alloys.
I8 in handle 6. lTapered pin I6 prevents handle
y Head l is streamlinedandshaped like the head
6 from slipping on adapter T and since it is made
of a torpedo. The >insulating cover `2 completely
from insulating material such as molded Bakelite
surrounds head II and can be .made from electrical
or Bakelite reenforced with canvasror .asbestos
and heat insulating materials preferably having
The head I, plunger 3, adapter 1 .and cable 9
can be made Afrom any of the well-known metals
low heat conducting properties, capable of with
' fibre,` pin ~vI6 prevents arcing.> Pin IB can be re
moved by driving the same out of openings I1
standing high temperatures and also having high
strength. The insulating cover should be capable
of withstanding high impact because the electrode
holder is frequently _dropped by the operator and
in many cases may even be used as .a hammer or
and I8.V
IAdapter1 'l is provided with a bore I9 threaded
50
as at 8 and is arranged to have a screw fit on the
threadedfend of head l._ _This screw fit ofthe
handle adapter 'l o-n head I is utilized for moving
subjected to other abuses wherein the insulation
plunger 3 into locking engagement with the elec
is subjected to high impact. Insul-ating cover 2
trode I I and also for releasing the same. Plunger
can be made from high temperature thermoset
ting plastics, such as Bakelite. Preferably canvas 55 3 is provided with a ball bearing 20 at each end.
Each ball bearing is retained in its socket 2I by
2,410,164
3
peening over the surrounding edge of the socket
as at 22. The ball bearing 20 is free to rotate in
its socket 2| and thus presents a diilîerent surface
for contact or locking engagement with the elec
trode I I each time the electrode is replaced. This
distributes the wear fairly uniformly over the sur
face of locking bearing 2|. When one ball bear
ing shows appreciable wear the plunger 3 is re
moved from the head and turned end for end, thus
4
bearings and plunger are removable as aunit from
said head, and means co-acting with said head
and the ball bearing in one end of said plunger
whereby the ball bearing in the opposite end of
the plunger is forced into locking engagement
with an electrode in said socket.
2. An electrode holder comprising in combina
tion an electrically conducting head having a
socket therein adapted to receive the end of an
presenting the other ball bearing for locking er1 10 electrode, said head having a longitudinal bore
communicating with said socket, a plunger slid
gagement with the electrode.
able in said bore, ball bearings journaled in the
The plunger 3 has a reduced portion 23 inter
opposite ends of said plunger whereby said ball
mediate its ends. A locking pin 24 has a friction
bearings and plunger are removable as a unit
fit in opposed openings in the head I and passes
from said head, a handle independent of said
15
through the recess or clearance provided between
plunger having a screw fit on the end of said head
the ends of the plunger by the reduced central
and contacting one of said ball bearings for fore
portion 23. Thus plunger 3 is free to move longi
ing
the other ball bearing into locking interen
tudinally in bore 25 of head I but cannot fall out
gagement
with an electrode in said socket.
when head I ís disconnected from the handle 6, 1.
3. An electrode holder comprising in combina
When it is desired to replace plunger 3, handle 20 tion
an electrically conducting head, an insulat
6, 1 is screwed off the end of head I, pin 24 is
ing cover surrounding said head, said head having
driven out or removed from the head, and this
a socket adapted to receive the end of an electrode,
permits plunger 3 to drop out of the head. If for
said insulating cover having an opening adjacent
any reason the plunger should stick in the head, a
said socket through which the end of the electrode
small rod can be passed through opening 26 in 25 is
passed into said socket, cooperating openings in
the head end of the holder and the plunger driven
said head and insulation, and a pin of insulating
out. Insulation 2 and the metal cover 5 can be
material passing through said openings for lock
removed from the head by ñrst removing the lock
ing the insulating cover on said head.
ing pin I5 which permits the insulation and metal
4. An electrode holder comprising in combina
30
cover to be slid off the head.
tion an electrically conducting head, an insulat
In operation the end of the electrode I I is slid
ing cover surrounding said head, said head having
into socket I4 and handle 6 is turned from the
a socket adapted to receive the end of an elec
position shown in Fig. l whereupon the bottom 21
trode, said insulating cover having an opening
of bore I9 in adapter 1 engages the right hand
adjacent said socket through which the end of
ball 20 to move the plungel- forward toward the 35
the electrode is passed into said socket, and a
electrode. This brings left hand ball 2!! into a
metal cover surrounding said insulating cover and
tight locking engagement with the end of the elec
insulated from said head, said metal cover also
trode. The current is principally carried to the
having an opening adjacent the aforementioned
electrode from the cable 9 through adapter 1 and
opening in the insulating cover for said electrode,
40
head I, although a minor flow of current will pass
said metal cover serving to reilect heat radiating
through plunger 3.
from the Welding arc and to protect the insulat
It should be noted that the head end of the
ing cover against damage, and cooperating open
electrode holder has an outline in longitudinal
ings in said head and insulating cover, and a pin
section which is substantially a parabola. Mak
of insulating material in said openings for locking
ing the head end of the holder a parabola in lon
the said head, insulating cover and metal cover
gitudinal section gives the holder a compactness
together as a unit.
so that it is capable of working in much closer
5. An electrode holder comprising in combina
quarters than other types of holders now on the
tion an electrically conducting head, an electri
market.
cally conducting adapter having a threaded con
nection with said head, an insulating handle cov
ering said adapter, an insulating cover surround
ing said head and having a skirt portion which
overlaps one end of the insulating handle, said
The pitch of threads 8 is such that a quarter ’
turn of handle 6, 1 is all that is necessary to lock
the plunger against, or release it from, the weld
rod II. This facilitates loading and unloading
of the holder. To remove handle 6 from adapter
1, pin I6 is ñrst driven out of openings I1, I8
whereupon the handle can be slid oil adapter 1.
i head having a socket adapted to receive an end
The use of pin 24 is optional and the same can be
omitted if desired.
of an electrode, said insulating cover having an
opening adjacent said socket through which the
end of the electrode is passed into said socket,
and means of electrically non-conducting mate
Head I is preferably provided with a plurality
of longitudinal grooves 50 which provide air spaces (if) rial for locking said insulating cover to said head,
and a 'plunger mounted in said head having one
between head I and the insulating cover 2 to aid
end arranged to contact said adapter and the
in cooling head I.
other end to project into said socket whereby rel
I claim:
ative rotation between the hand-grip portion of
1. An electrode holder comprising in combina
said insulating cover and the handle effects lon
tion an electrically conducting head having a
socket therein adapted to receive the end of an
electrode, said head having a longitudinal bore
communicating with said socket, a plunger slid
able in said bore, ball bearings joumaled in the
opposite ends of said plunger whereby said ball 70
gitudinal movement of said plunger and projects
the said other end of the plunger into said socket
to lock an electrode therein.
HONEL A. JACKSON.
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