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Патент USA US2115324

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April 26, 193s.-
2,115,324 `
c. BARDWELL
ELECTRICAL CONNECTER
l Filed Dec, 2, 1936
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Patented Apg. 2s, 193s n
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2,115,324 t
UNITED STATES ¿PATENT ' OFFICE.v
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2,115,324
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ELECTRICAL coNNEc'rEn
Cecil Bardwcll, West _Los Angeles, Calif., assignm
to Motion Picture Electric Products, Los An
gcles, Califl, a corporation of California>
Applicata@ December z, 193s, serial No. 113,809
_10 Claims. (Cl. 113-4328)
This invention relates -to connecters for elec-
cally conductive material, and attached lto this
_ trical conductors, an'd particularly to connecters
plug, as by screw I4, is an insulating sleeve I5,
for electrical conductors carrying relatively heavy
which extends somewhat beyond the rearward
currents, as for example as used in connection
5 with motion picturestudio lamps.
'
It has been common to provide electrical connecters comprising a pair 'of interfltting parts,
one of which is siidable within the other, and
which when fitted together form an electrical
L0 connection.
end I6 of plug I3, as shown. Joint element I2
comprises a cylindrical metallic socket member g;4
I8, also preferably of brass, to which is attached,
as by screw I9, an insulation sleeve 20 which
extends rearwardly somewhat beyond therear
ward end 2l of the socket member as shown.l
Connecters of this type as hereto- `
> The outer or rearward ends of'plug member I3 10
fore known, howeveryare frequently either liable and socket member I8 are provided with sockets
to be -accidentally pulled apart, or are difficult to _23 and 24, respectively, to receive the terminals
manipulate.
«
..
. ' of electrical conductors 25 and 26, which are sol
It is the purpose o the _present invention to
dered in place.
l5 provide an electrical connecter adapted to be
connected and locked together by a very simple
and convenient manipulation, and which' -likewise may 'be disconnected by a simple reverse
manipulation.
2o
'
Plug I3 is provided at its forward end with a l5
central cylindrical pin or tongue 30, which socket member I8 has a central bore 36 adapted slidably
and rotatably to receive said pin or tongue.
f' '
A further object of the invention is to prolvide a connecter which is of a nature to insure
a substantial area of contact between the conductor portions of the Joint elements.
Either the plug or socket member, as here illus
tratively shown, plug member I3, is provided at 20
its forward end with a semi-circular flange 3I`
which is annularly spaced from the tongue. The
outer surface of this flange 3l is concentric with
A still further object of the Ainvention is to
the axis of the plug, being preferably a contin-
25 provide a conductor whichisdurable, simple and
relatively _ inexpensive to manufacture.
Various additional objects and advantages ofmy invention- will appear from the following de. tained description of .present preferred embodi30 ments thereof, reference for this purpose being
had to the accompanying drawing, in which:
Fig. 1 shows the two joint elements in accordance with the present invention in position before
being moved into connection, one of the joint
35 elements being ~shown in partial section;
'
Fig. 2 is a perspective view of ’ ne of the jointelements;
-
y _complemental joint element;
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The other joint member, asl here illustrated,
socket member I8, has a semi-circular flange 31. 35
The outer peripheral surface 38 of flange 31 is
element, as clearly shown in Fig. 5, and is conicalv
shaped, inclining outwardly or diverging towards
Fig. 4 isà a longitudinal section of the joint
elements moved together but before being twisted
its outer end. The inner surface 40 of flange 31' 40
is a continuation of the ‘central bore 36 of the -
into locking position;
socket.
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Fig. 5 is a transverse section on line 5--5 of
Fig- 4;
45,
ing inner engaging surface. >
eccentric with reference to the axis of the Joint '
.' Fig. 3 is a perspective view of the other or
40
_
uation of the outer cylindrical surface of the 25
plug.> The inner surface 33 of flange 3|, however,
is eccentric with reference to the plug axis, as
clearly appears from Fig` 5. This inner surface
33 of vflange 3l is also conical shaped, as illus
trated, flange 3l vthus tapering in thickness from 30
its outer end toward its juncture with the body
part of the plug to provide a forwardly converg
'
. ~
Fig. 6 is a view similar to a portion of Fig. 4
but showing the parts after having been twisted
into locking position;
Flange 31 thus tapers in thickness from
its outer end toward its juncture with the body
portion of socket I8.
As will be apparent from
the drawing, the eccentricity and taper of flange 45
31 are complementary to those of Aplug flange 3l. ’
' In connecting the joint-parts, they are slipped ’
Fig. 7 is a transverse section taken 'on line- together into the position shown in Figs.4 and 5, ï
1-1 of Fig. 6; and ,
50
’
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.
Fig. 8 is a sectional view similar _to Fig. 'Z but
showing a modified form ofthe invention.
The two joint elements of the connecter are
indicated in the drawing at II_ and I2. Joint „
the socket flange ~31 lying at the side of tongue
or pin 30 opposite that occupied by flange 3l. 50
The thinner edge 42 of ñange 31 isv then diS
posed opposite the wider opening between pin
30 and plug flange 3|. 'The plug and socket are
element Il comprises a cylindrical metallic plug ` then reiatively‘twlsted.
55 I3, preferably' of brass or other durable electri-
For instance, assume
'
that the plug is held stationary and the socket 55
2 .
'
2,115,824 -
is rotated in a right-handed direction. Flange 31
is thus brought beneath flange _3L the comple
mental eccentric flange faces 33 and 3,8 of the
flangescoming into tight facial >contact and be
5`coming frictionally interlocked to resist acci
dental reverse rotation, and the flange parts then
being in the overlapped position shown jin Figs.
substantiallyv semi-circular flange spaced outside „
the pin and pin socket and provided with an inner
conical engaging face converging toward the for
ward end -of the ñange, theother of said con
necter members having` extending from -its vfor- »
ward end a substantially semi-circular flange
of smaller diameterdisposed outside said pin and
6 and 7. Such engagement of> the faces of course pin socket and having an outer conical engaging
prevents the socket from being rotated too far in a -face diverging toward the outer*> end of the flange l
right-handed direction. At the same time, the _ complementarily to the conical engaging surface
_complementary tapers ofthe two flanges prevent of theÍ flrst mentioned flange, and adapted to be
subsequent accidental longitudinal separation of -brought into engagement therewith by relative
the joint-parts.
rotation of the connecter members after the4 pin
To disconnect the connecter, it is merely neces
has been inserted in the pin socket, with the
15 sary to rotate the joint parts in the opposite di-~ flanges on opposite sides of the’connecter, one
rection _and then -pull them apart.
~ ,
of said engaging' surfaces being eccentric to the
In Fig. 8 is shown a' modification, in which only axis of the pin and pin socket, and the other of
one of the flanges, which. may be either of the
two, though- as here shown inner flange 31a, has
'20 an eccentric engaging face, indicated atv 38a, the
cooperating innerI surface 33a of the outer flange
being formed concentric with the axis of the joint.
Otherwise the parts are the same as in the pre
viously described form. In this instance _the same
25 locking effect is accomplished `in the same manner,
said engaging Afaces being concentric with said
axis.
g
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`3. An electrical'connecter comprising plug and
socket connecter members, each comprising an
elongated metallic body portion adapted to have
an electrical conductor connected thereto, the
forward end of said plug member Vhaving a cen-`
tral projecting pin and the forward end of the
except that'the peripheral surfaces of the flanges socket member having a central cylindricalsocket
do not contact throughout. 'I'here is thus lost ' adapted to receive said pin, one of said connecter
some of the benefit of the large -area of contact. members having extending from its forward end a
hadvwhen the connecter is made in the manner substantially senil-circular flange spaced outside
30 ilrst described, though the connecter in this form the pinand pin socket and provided with an inner 30
' still has sufilcient area of contact for many pur
poses. This form has the advantage of greater
ease of manufacture.
'
I have now described in detail certain specific
35 forms of my invention; it is to .be understood,
l however, that various changes in design, struc
ture and arrangement may be made without de
parting from the ,spirit and scope of my inven
tion or of the appended claims.
40
I' claim:
‘
g
conicalengaging face converging toward the for
ward end of the flange, the other ‘of said con- >
necter members having extending from its for
ward end a substantially semi-circular flange
of smaller diameter disposed outside said pin and
pin socket and having an outer conical engaging
face diverging towardthe outer end of the flange
complementarily'to the conical engaging’surface
of the ñrst mentioned flange, andadapted to be
brought into engagement therewith by relative
_ 1.‘ An 'electrical connecter comprising plug and : rotation of the connecter members after the pin ‘
socket connecter members, each comprising an
elongated metallic body portion adapted to have
anv electrical conductor connected thereto, the
forward end of said plug’member having a central
projecting pin and the forward end of the socket
member having a central cylindrical socket adapt
ed to receive said pin, one of said connecter
-members having extending from its forward end
a substantially _semi-circular flange spaced out
side the pin and pin socket and provided withI an
inner conical engaging face converging toward the - ^
forward end of the flange, the other of said con
nectermembers having extending from its for-`
ward end a substantially semi-circular flange of
smaller diameter disposed outside said pin and
pin socket and` having an outerconical engaging
face diverging toward the outer end of the flange
complementarilyto the' conical engaging surface
of the first mentioned flange, and adapted to be
brought into engagement therewith, tby relative
rotation of the connecter members after the pin
has been inserted Pin the pin socket, with the
flanges on opposite-- sides of the connecter, at least
one of said engaging surfaces being eccentric to
the axis of the _pin and pin socket.
-2. An electrical connecter comprising-plug and
socket connecter members, each comprising an
elongated metallic body portion radapted to have
' an electrical conductor connected thereto, the
’ -' ‘forward end of said plug member having a central
projecting pin-and the forward endl of the- socket
member having a central cylindrical socket adapt
ed to'rgcelve said pin, one of said 4connecter mem'
- bers having extending from its 'forward end a
has been inserted inthe pin socket.- with the
flanges on opposite sides- of the connecter, the
engaging v_surface on the inside ñange being
slightly eccentric to the axis of the pin and pin 45
socket.
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4. An electrical connecter comprising plug and
socket connecter members, each comprising an
elongated metallic body portion adapted _to have
an electrical conductor connected thereto, the for 50
ward end of 'said plug member having a central A
projecting pin and the forward end of the socket
member having a central cylindrical socket adapt
ed to receive said pin, one of said connecter mem
bers having extending from its forward end a sub 55
stantially semi-circular flange spaced outside the
pin and pin socket and provided with van inner
conical engaging face converging toward the for-v
ward end of' the flange, the other of said con`
necter members having extending from its for 60
ward end a substantially semi-circular flange of
smaller diameter disposed outside said pin and pin
socket and having an outer conical engaging face
diverging toward the outer` end of the flange com
plementarily to the conical engaging surface ofl 65
the firstA mentioned flange, and adapted to be
brought into engagement therewith by relative ro
tation of the _connectervmembers after the pin
has been'inserted- in the pin socket, with vthe .fianges on oppositesides of the connecter, the 70
engaging surface on the >inside flange being
slightly eccentric .to the vaxis oi' the pin and pin
socket, andv the engaging surface onn the outside flange being> concentric with said axis.
.
5. An electrical connecter comprising plug and
'
3
2,1 16,824
socket connecter members, each comprising an
elongated metallic body portion adapted vto have
an electrical conductor connected thereto, the
forward end of said plug member having a cen
tral projecting pin and the forward end of the
socket member havingf a- central cylindrical
socket adapted to receive said pin, one of said
ber flange and is adapted to engage with said y
conicalvinside engaging surface when the plug
and socket members are relatively rotated after
the pin on the plug member has beenv inserted in
the socket in the socket member with the flanges
on opposite sides of the connecter, one of said
engaging surfaces being eccentric to the axis of
the pin and socket, and the other of said surfaces .
connecter members having extending from its -being
concentric with said axis.
forward end a substantially senil-circular -flange
i3.` An electrical connecter comprising plug and
spaced
outside
the
pin
and
pin
socket
and
pro
socket connecter members, each comprising an
10
vided with an inner conical engaging -face con
elongated metallic body portion adapted to have
verging toward the forward -end of the ñange, -an electrical conductor connected thereto, the ~
the other of >said connecter membersr having ex
tending from its forward end a substantially
semi-circular flange of smaller diameter disposed
15
outside said pin and pin socket and having an
outer conical engaging face diverging toward the
outer end of the flange complementarily to the
conical engaging surface of the first mentioned
20 flange, and adapted to be brought into engage
I ment'therewith by relative rotation- of the con
necter members after the pin -has beeniinserted
in the pin socket, with the flanges on opposite
sides ofthe connecter, said engaging surfaces
both being eccentric to the axis of the pin and pin.
socket, in such ?ianner as to become overlapped
and frictionally interlocked in facial engagement
25
with one another when the connecter-members
are rotated about the axis of the pin and socket.
30
6. An electrical connecter comprising‘plug and
socket connecter members, each comprising an
elongated metallic body portion adapted to’have
forward end of said plug member having a cen
tral projecting pin and the forward end of the ll
socket member having a central cylindrical socket
adapted _to .receive said pin, said plug memberhaving extending from its forward end a semi
circular flange spaced _outside the pin and pro
vided with aninner conical engaging face con
verging toward the forward end of the flange,
said socket member having extending from its
forward end a substantially senil-circular flange,
the inside surface of which is formed in continua
tion of the pin socket, and the outside surface of
which is conical and diverges toward the outer
end of the flange complementarily to the conical
inside engaging surface.. on the plug- member
flange and is adapted to engage with said conical
inside engaging surface when the plug» and socket
members are relatively rotated after the pin on
the plug member has been inserted in »the socket
in the socket member with the flanges on oppo
site sides of the connecter, the engaging surface
on the inside flange being slightly eccentric to
an electrical vconductor connected thereto, the
forward end of said plug member having a central
35 projecting pin ,and the'forward end of the socket the axis of the pin and pin socket.
member having a central cylindrical socket
9. An electrical connecter comp `ing plug and .
adapted to receive said pin, said _plug member -socket connecter members, each comprising-an A
having extending from its forward end a semi
circular flange spaced outside the pin and pro
elongated metallic body portion adapted to have
an electrical conductor connected thereto, the
40 vided with an inner conical engaging face con
forward end of saidvplug member lhaving a cen
verging toward the forward end of the flange, - tral projecting pin and the forward end of the
said socket member having extending from its
forward end a substantially semi-circular flange,
the inside surface of which is formed in continua
45 tion of the pin socket, and the outside surface of
which is conical and diverges toward the outer
end of the flange complementarily to the conical
inside engaging surface on the plug member.
flange and is adapted to engage with said corneal
-50 inside engaging- surface when the plug and socket
members are relatively rotated after the pin on
the plug member has been inserted in the socketin
'the' socket member with'the flanges on opposite
sides .of the connecter, at least one of said engag
55
ing surfaces being eccentric to the ‘axis of _the pin
and pin socket.
,
,c
'7. An electrical connecter comprising plug and
socket connecter members, each comprising an
elongated metallic body portion adapted to have
co
an electrical conductor connected thereto, the
forward' end of said plug member having a cen
socket member having a central cylindrical socket
adapted to receive said pin, said plug member
having extending from' its forward end a semi
circular flange spaced outside the pin and pro
vided with an inner conical engaging face con
verging toward the forward end of the flange, said
socket member having extending from its forward '
end a substantially semi-circular flange, the in
side surface of which is formed in_continuation of
the pin socket, and the outsidesurface of which
is conical and diverges toward the outer end of '
the flange complementarily to the conical inside
. engaging surface on the'plug member flange and
is adapted to engage with said conical inside en
gaging surface when the plug and socket members
are relatively rotated aftervthe pin on the plug
member has been inserted in the socket in the
socket member with the flanges on opposite sides
of the connecter, the engaging surface on the
inside flange being slightly eccentric to the axis.
tral projecting pin and the forwardf?eind of the j of the pin _and pin socket, _andA the engaging'socket member having a central @cylindrical surface on the outside flange being concentric f
socket adapted to receive said pin, said plug mem
65
ber having extending from its forward end a semi- _
circular flange spaced outside the pin and pro
vided with an- inner conical engaging face con
verging toward the forward end of the flange,
said socket member having extending from its for
ward end a substantially semi-circular ñange,
-the inside surface of -which is formed in continu
ation'of the pin, socket, and the outside surface
‘of 'which' is conical `and diverges _toward the
outer end'of the flange complementarily to -'the
...75
conical inside engaging surface on the plug mem
with said axis. »,
.
1
« 10. An electrical connecter comprising plug and
socket connecter members, each comprising an
elongated metallic body portion adapted to have
an electrical conductor connected thereto, the
forward end of said plug member having a cen
tral projecting pin and the forward end ofthe
socket member having a central cylindrical Asocket
adapted to receive said pin, said plug member
having `extending from its forward end a semi
circular flange spaced outside the pin and pro.
4
ana-au
_
.
,
l
vided with an inner conical engaging face
are relatively mçafeg after” the pmon the plm;v verging toward the forward end of the flange. said' member has been inserted in the socket in_the
- socket member having extending from its forward socket member with the flanges on opposite sides
end eîsvubstantially semi-circular flange, the in .of -the connecter. said engaging'sln'faces both
side surface'> of which is formed in continuation being eccentric to theaxis of the pin and pin
of the pinl socket, and the outside surface of which socket. in auch manner as to become overlapped
is conical and diverges toward theouter end of and frictionally interlock'ed- in facial engagement y
the iiange complementarily to the conical inside with one another when the connecter members
' engaging surface 'on the plug member iiange and
10. is adapted to engage with’said conical inside en- '
gaging surface when the plug and socket members
are rotated about the axis ofthe Din andnsocket. ’ n
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