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Патент USA US2412309

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Dec. 10, 1946.
M. WELLS
I
2,412,309
INSULATED ELECTRODE HOLDER
Filed July 12, 1944
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BY 7ATTORNEY
Patented Dec. 10, 1946
2,412,309
UNITED STATES PATENT OFFICE
2,412,309
INSULATED ELECTRODE HOLDER
I
Martin Wells, Los Angeles, Calif.
Application July 12, 1944, Serial No. 544,549
11 Claims. (01. 219—8)
2
My invention relates to a holder for a metal
rod or electrode employed in electric welding
processes, and is a continuation-in-part of my
copending application for Electrode holder, Serial
No. 487,681, ?led May 20, 1943.
by or comprising a latch means which is secured
within the insulator during the process of mold
ing the same.
A further object of the invention is to provide
Cl
a cooperation of electrode holder with a tubular
It is an object of the invention to provide a
insulator which by reason of the insulator ?tting
completely insulated electrode holder which is
loosely upon the metal body of the holder, move
of slender form and light weight and is so con
ment is provided therebetween to break loose
structed that parts thereof which are subjected
materials which tend to accumulate in the joint
to severe wear may be readily placed without the 10 between the electrode holder body and the in
use of tools.
sulator where the rod opening extends through
It is an object of the invention to provide an
these parts, thereby minimizing arcing at this
electrode holder having a handle from which
point.
there projects a relatively slender substantially
Further objects and advantages of the inven
cylindric metal body equipped with means to
tion will be brought out in the following part of
grip an electrode or welding rod, this metal body
the speci?cation.
having thereon a separate insulator which may
Referring to the drawing which is for illustra
be readily placed in operative position by the
tive purposes only,
mere expedient of sliding it into place, there being
Fig. 1 is a partly sectioned side view of an elec
means operative between the body and the insula~ 20 trode holder embodying my invention.
tor engaging to hold the insulator in place on
Fig. 2 is a cross section to enlarged scale taken
the body.
as indicated by the line'2-2 of Fig. 1.
It is an object of the invention to provide an
Fig. 3 is an elevational view of the reticulated
electrode holder of the class described having a
reenforcing element of the insulator shown in
replaceable tubular insulator reeniorced by metal
Fig. 1.
reenforcing means therein, and having means
for engagement with the head or body of the
electrode holder so as to hold the insulator in
indicated by the line 4—4 of Fig. 1.
place.
This insulator is subjected to heavy
service, and should it become injured or broken, '
may be readily replaced by a new, duplicate, in
sulator without loss of time and without need
Fig. 4 is a fragmentary sectional view taken as
Fig. 5 is a fragmentary sectional view taken as
indicated by the line 5—5 of Fig. 1.
Fig. 6 is a perspective view of the spring ?nger
employed in the insulator.
In Fig. 1 I show an electrode holder comprising
for tools or tool-operated fastening means.
a handle ll! of insulating material and a head
It is a further object of the invention to provide
H. The head It includes a metal body l2 of
an electrode holder wherein one of the jaws for 35 approximately cylindric form having a rounded
gripping the electrode comprises a portion of the
front end 13. This head H has near its front
metal body of the holder, and the other jaw mem
end a lateral opening M to receive a portion of
ber comprises a rod arranged to move axially,
a welding electrode 25. The head I! has an
this electrode holder having for use on the for
axial opening it which extends from the inner
wardly extended portion thereof a cap formed A portion of the lateral opening M to the rear end
from insulating material, and a further object
of the head H. A portion of this axial opening
of the invention is to provide on the interior of
[6 is de?ned by threads ii to receive the threaded
such cap a resiliently disposed latch means for
portion 18 of a rod or bar is, the forward end
holding the cap in operative position on the
of which is adapted to engage the welding elec
holder.
trode l5 and the rearward portion of which pro
A further object of the invention is to provide
vides a means whereby an electric conductor may
a simple replacement insulator which may be
be connected to the body H2, in the known man
readily applied to the electrode holder, and a
ner followed in the art. The rearward portion
further object of the invention is to provide an
20 of the bar member it] extends from the rear
insulator of this character having a tubular wall
end of the body l2 and is connected to the handle
to enclose a portion of the electrode holder, there
l0 so that by rotation of the handle it), the
being a relatively small opening in this tubular
member I13 may be caused to rotate and through
wall leading in from the end of the tubular wall
threaded engagement with the body l2, advance
in substantially parallel relation to the axis there
toward or recede from the inner end of the weld-
o?pnewall of this’ small opening being formed
ing electrode 15. The body I2 has thereon a;
2,412,309
3
longitudinal rib or shoulder 22 which is notched
at 23 so as to provide a rearwardly faced shoulder
24 in a plane transverse to the lengthwise di
mension of the body 12.
Substantially completely enclosing the body I2
there is an insulator 25 of tubular form.
This
insulator 25 is closed and rounded at its front
end 26 so that the insulator will have the form
of a cup or cap which ?ts over the body i2 and
is slidable thereonto from the front end of the ‘
body I2. This insulator 25 is molded from a
durable insulating compound such as Bakelite
and has therein a reenforcing element 2'! which
is of metal and is embedded in the material of
It will be noted that there is a space 4| be
tween the insulator 25 and the head ll so that
the insulator 25 is movable on the head H a
sufficient distance to break down any accumula
tions of bridging material between the adjacent
portions of the openings [4 and 46. This sub
stantially avoids the destruction of the end of
the metal head i l which has occurred in insu
lated electrode holders having the tubular in
sulator ?xed rigidly on the metal body.
I claim as my invention:
1. In an insulating means for an electrode
holder having a metal body having a rod open
ing leading in from a face thereof to meet an
the insulator 25 during the molding thereof.
The reenforcing element 21 is of recticulated
internal opening in said body, said body having
character so as to provide many openings through
ternal opening to grip a rod in said rod opening,
a handle’ for supporting said body, and means
for connecting an electric conductor to said
which the insulating material passes.
A feature of my invention is that .1 form this
reticulated reenforcing element 21 from woven
mesh screen 30, as shown in Fig. 3. A strip
of the screen 30 is turned back upon itself inter
mediate its ends and the transverse wires 3!
of the screen 30 are bent to semicircular form,
thereby producing of the screen 351 a reenfo-rc
ing element 27 de?ning a hollow cylinder having
the rounded front end 32 to correspond to and
lie within the rounded front end wall 26 of the
insulator 25. As clearly shown in Fig. 2, the
insulator 25 has therein a longitudinal channel -
33 providing shoulder means St to engage the
rib or shoulder 22 of the body 52, so that the
insulator 25 will not rotate on the body [2.
Along a portion of the channel 33, the insulator
25 internally carries a spring ?nger 36 which
is adapted to engage the transverse shoulder 24
of the body [2 when the insulator 25 is slid into
position on the body l2, thereby providing a
means of engagement between the body i2 and
a locking shoulder thereon, means in said in
body, the combination of: a tubular insulator
having an opening to receive said body and
being slidable onto said body, and having therein
a resilient ?nger to engage said locking shoulder
so as to prevent removal of said insulator from
said body, said insulator having a small opening
leading in from its end, one wall of said small
opening being formed by said ?nger.
2. In an insulating means for an electrode
holder having a metal body having a rod open
ing leading in from a face thereof to meet an
internal opening in said body, said body having
a wall formed so as to provide a shoulder thereon,
means in said internal opening to grip a rod in
said rod opening, a handle for supporting said
body, and means for connecting an electric con
ductor to said body, the combination of: _a tubu
lar insulator slidable onto said body, said tubu
the insulator 25 to hold the insulator 25 in '
lar insulator having therein a resilient catch
means to engage said shoulder so as to prevent
removal of said insulator from said body.
position on the body 12. It will be understood
that this insulator 25 may be supplied to the
3. In an electrode holder of the class described,
the combination of: a handle; rod holding means
user of the electrode holder as a replacement
carried by said handle comprising actuating
' part.
The spring ?nger 38 has at its rear end,
as shown in Fig. 6, tongues 31 which are em
bedded in the wall of the insulator 25 during
the process of molding the insulator. As shown
in Fig. 1, an opening 39 extends into the wall
of the insulator 25 from the rear end face, one
of the walls or margins of this opening 39com- .
prising the spring ?nger 35. The opening 39
lies behind the spring ?nger 36 and into this
means and a part to engage and cooperate in
the holding of a rod; an insulator for said part,
said part and said insulator being so cooper
atively formed for interengagement that said in
sulator may he slid onto said part into operative
position relatively thereto and embodying a
tubular wall to surround said part; and resili
ently disposed catch means operative between
said part and said insulator to hold said in
opening 39 an ‘instrument may be inserted to
sulator in place on said part. ~
bend the front end of the spring ?nger 35 into
‘lpln an electrode holder of the class de
the cavity of the insulator 25 so that it will be
scribed, the combination of: a handle; rod hold
in a position for engagement with the shoulder
ing means carried by said handle comprising
24 when the insulator 25 is placed on the body
actuating means and a part to engage and co
I2. During the molding of the insulator 25,
operate in the holding of a rod, said part having
the opening 39 is occupied by a metal bar or
an external locking shoulder; an insulator for
pin which assists in maintaining the spring 60 said part, said part and said insulator being
?nger 36 in its desired position.
so cooperatively formed for interengagement
It will be noted that the insulator 25 has an
that said insulator may be slid onto said part
opening 40 aligned with the opening it of the
into operative position relatively theretoyand a
head ll, through which the electrode l5 passes.
resiliently disposed ?nger connected to said in
In the use of the device particles of metallic or
sulator contiguous to its inner face, so that it
electro-conductive material pass into and through
will be positioned between said insulator‘ and
the opening 40, and the heat encountered in the
said part, to engage said locking shoulder and
use of the device may char the wall of the open
hold said insulator in place on said part.
ing 40 so that it is somewhat carbonized. A
5. In an insulator means for an electrode
special feature of my present invention, which
holder of the class described having a handle,
I believe constitutes a valuable contribution to
rod holding means carried by said handle com
the electrode art, consists in the provision of
prising actuating means and a part to engage
means for preventing bridging of electro~
and cooperate in the holding of a rod, the com
conductive materials between the insulator 25
bination of: an insulator for said part, said part
and the head II at the‘ openings [4 and 50.
and said insulator being so cooperatively formed
2,412,309
5
for interengagement that said insulator may be
slid onto said part into'operative position rel
atively thereto; and resiliently disposed catch
means operative between said part and said in
sulator to hold said insulator in place on said Lil
part.
6. In an insulator means for an electrode
holder of the class described having a handle,
rod holding means carried by said handle com
prising actuating means and a part to engage
and cooperate in the holding of a rod, said part
having an external locking shoulder, the combi
nation of: an insulator for said part, said part.
and said insulator being so cooperatively formed
for interengagement that said insulator may be
slid onto said part into operative position rela
tively thereto; and a resiliently disposed ?nger
connected to said insulator contiguous to its inner
face, so that‘it will be positioned between said
insulator and said part, to engage said locking
shoulder and hold said insulator in place on
said part.
7. In an insulating means for an electrode
holder having a metal body having a rod Opening
leading in from a face thereof to meet an in
ternal opening in said body, said body having a
6.
will be relative movement between said insulator
and said body to prevent the formation of a
bridge of conductive material between said body
and said insulator; and resiliently disposed catch
means operative between said part and said in
sulator to hold said insulator in place on said
part.
9. In an electrode holder of the class described,
the combination of: a handle; rod holding means
carried by said handle comprising actuating
means and a part to engage and cooperate in
the holding of a rod; an insulator for said part,
said part and said insulator being so cooperative
ly formed for interengagement that said insu
lator may be slid onto said part into operative
position relatively thereto, said insulator being
loosely ?tted on said body so that there will be
relative movement between said insulator and
said body to prevent the formation of a bridge
of conductive material between said body and
said insulator; and means operative between said
part and said insulator to hold said insulator in
place on said part.
10. In an electrode holder of the class de
scribed, the combination of : a handle; rod hold
ing means carried by said handle comprising
actuating means and a part to engage and co
transverse shoulder thereon, means in said in
ternal opening to grip a rod in said rod opening,
operate in the holding of a rod; an insulator
a handle for supporting said body, and means
for said part; and means for holding said in
for connecting an electric conductor to said body, 30 sulator on said part so that it will be loose upon
the combination of: a tubular insulator slidable
said part for the purpose of preventing the for
onto said body, said tubular insulator having
therein a resilient catch means to engage said
transverse shoulder so as to prevent removal of
said insulator from said body, said insulator be
ing loosely ?tted on said body so that there will
be such free relative movement between said
insulator and said body as to prevent the forma
tion of a bridge of conductive material between
40
said body and said insulator.
8. In an electrode holder of the class described,
the combination of : a handle; rod holding means
carried by said handle comprising actuating
mation of electroconductive material between the
part and the insulator.
11. In an insulating means for an electrode
holder having a metal body having a rod open
ing leading in from a face thereof to meet an
internal opening in said body, said body having
a transverse shoulder thereon, means in said
internal opening to grip a rod in said rod opening,
a handle for supporting said body, and means
for connecting an electric conductor to said body,
the combination of: a tubular insulator slidable
onto said body, the opening in said tubular mem
means and a part to engage and cooperate in
ber being of such size that said tubular member
the holding of a rod; an insulator for said part, ~15 will have loose relative movement on said body
said part and said insulator being so cooper
to prevent accumulation of electroconductive
atively formed for interengagement that said in
materials between said tubular member and said
body.
sulator may be slid onto said part into oper
ative position relatively thereto, said insulator
MARTIN WELLS.
being loosely ?tted on said body so that there 50
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