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Патент USA US2134355

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Oct. 25, 1938.
A. E, CALDWELL
2,134,355
SWIVEL ELECTRICAL CONNECT ION
Filed July 9, 1954
4 Sheets-Sheet l
Oct. 25, 1938.
A. E. CALDWELL
’ 2,134,355
SWIVEL ELECTRICAL CONNEQTIÓN
Filed July 9, 19.34
4 Sheets-Sheet 2
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A. E. CALDWELL
SWIVEL ELECTRICAL CONNECTION
VFiled July 9, 1934
4 Sheets-Shee’s 3
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Oct. 25, 1938.
A. E. CALDWELL
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2,l34,355
SWIVEL ELECTRICAL CONNECTION
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Patented Oct. 25, 1938
2,134,355
UNITED STATES PATENT ori-‘ICE
2,134,355
SWIVEL ELECTRICAL CONNECTION
Albert E. Caldwell, Galesburg, Ill., assignor to
Eby Inventions, Inc., Philadelphia, Pa., a cor
poration of Pennsylvania
Application July 9, 1934, Serial No. '134,308
10 Claims. (Cl. 173-324)
This invention relates to swivel electrical con
nected without turning it into a predetermined
nectors and more particularly is directed to such position to align it with the contact prong-re
connectors as employed to effect detachable elec'
ceiving openings of the receptacle.
trical connection between an outlet and an elec
Another object of the present invention is to
Si trically operated appliance, such as the connec
provide a swivel connector having bearing sur- n
tions between a flexible conductor and a wall faces about which the rotation occurs, which sur
socket or outlet, or a flexible conductor and the faces are also employed for carrying the electri
appliance which is supplied with current thereby. cal circuit through the device. By this con
In my copending application, Serial No.
10 {521,079, filed July 6, 1932, which has matured struction I provide a wiping contact surface
which is always maintained clean and bright by lo
into Patent No. 2,055,999 on Sept. 29, 1936, I the rotation effected during connection and op
have disclosed one form of a swivel connector of eration of the device, and which therefore re
this type, commonly called a push plug or prong duces the electrical resistance through the device.
plug having extending contact prongs adapted
A distinct advantage securedby the present
to be engaged within a receptacle such as a wall invention is the adaptability of the basic con- lti
socket or the like, and which in turn is provided struction for use in a plurality of different types
with contact members adapted to be engaged by
a second contact plug carried by the flexible con
ductor, the contact members being rotatably car
20 ried by the cover of the push or prong plug to
provide a swivel connection between the plug
connected to the cord and the prong plug.
The present invention has for its primary ob
of connector devices, including the connectors
between the current conductors or cord and the
appliance, so that, if desired, swivel connections
may be provided at each end of a flexible con- 20
ductor or cord. Also, threaded plug connectors
for use in connection with threaded outlet sock
ets may be provided with the swiveling means of
ject the provision of a swivel connector of a basic _ the present invention.
25 design that may be incorporated in a plurality
of different types of swivel connectors, and which
provides a freeswiveling connection having rela
'- tively small frictional resistance to rotation so
that connection thereto and subsequent rotation
30 of the connector means may be facilitated.
In the development of modern portable elec
trical appliances, it has become customary to
provide a flexible connector or conduit extending
from the appliance to an adjacent electrical out
let.
However, in the use of such appliances as
trouble lamps, electric irons, vacuum cleaners,
ordinary portable lamps-and the like, these ñex
ible conductors have a tendency to become kinked
or twisted, and to remedy this undesirable sit
40 nation I have provided a swivel electrical con
nector which is capable of automatically rotating
to accommodate any twisting or kinking tend
encies of the cord. Further, wall outlets are
sometimes so situated as to be inconvenient of
access, or disposed in a relatively dark location
where the position of the openings for receiving
the contact prongs cannot be readily ascertained.
By the provision of a swivel connector of the type
disclosed in the present invention, the insertion
\
In addition, the present invention is capable
of providing a unitary Wall outlet construction
5
having the swiveling means of the present in
vention incorporated therein, whereby no addi
tional swiveling connectors need be provided for
attachment of a iiexible cord thereto.
30
A further feature of the present invention is
the provision of resilient means for spacing the
cover of the connector device a slight distance
away from the defining edge of the receptacle,
to decrease the frictional resistance to rotation,
the resilient` meansvbeing independent of the
electrical circuit extending through the device.
A still further object of the present invention
is the provision of a compact and simplified
construction in which all of the current conduct- 40
ing parts may be economically formed and as
sembled, the contact-engaging and conducting
members being preferably formed from metal
stampings. Another advantage secured by rea
son of this construction resides in the feature of
having all of the rotatable elements carried by
the swiveling member, and mounted upon a single
centrally extending post which forms a part of
the electrical circuit, whereby the swiveling con
of the contact prongs connected to the electrical ’ tact members may be readily assembled in posi- 50
cord is facilitated by a cooperating rotation of tion uponthe post, together with the cover, and
the cover of the connector, whereby the open
this structure may then be secured to the recep
ings are brought into register with the contact tacle in order to form the complete contact con
prongs by application of axial pressure to the nector.
`
55 prongs, and the cord can thus be readily con
Other objects and advantages of the present
2
2,134,855
invention will appear more fully from the fol
lowing detailed description, which, taken in con
nection with the accompanying drawings, will
disclose to those skilled in the art the construc
tion and operation of a preferred form of the
present invention.
In the drawings:
Figure 1 is an elevational view of a push or
prong type of plug constructed according to the
10 present invention;
Figure 2 is a plan view of the plug shown in
Figure 1;
.
Figure 3 is a vertical sectional view of the plug,
taken substantially on the line 3-3 of Figure 2;
Figure 4 is a vertical sectional view ofthe
15
let. Mounted for rotation within the receptacle
5 is a swivel cover 8, which also is formed of
suitable insulating material, such as molded or
pressed phenol condensation material or the
like.
'
'
'
The cover 8 is provided at its center with a
boss portion shown at 9, having a recess I8 of
hexagonal or other suitable polygonal shape
formed therein. Disposed upon opposite sides
of the boss 9 are a pair of openings I2, which
are adapted to receive the contact prongs of a
plug connector carried by a flexible cord or the
like. The openings I2 are located a considerable
distance below the upper surface of the cover
8, and are separated by a defining ridge I3 which
plug taken substantially on the line 4--4 of Fig
ure 2;
extends from the outer periphery of the cover
8 inwardly to the central boss 9. This ridge is
Figure 5 is aperspective view of a contact ñnger
employed in the present invention;
extend downwardly toward the openings I2.
Figure 6 is a perspective view of the contact
20
member which extends the electrical circuit from
a contact finger to one of the prongs of the plug;
Figure 'I is a perspective view cf an interme
diate current-carrying member employed in the
plug construction;
Figure 8 is an elevational view of a threaded
type o'f plug embodying the present invention;
Figure 9 is a bottom plan view of the plug as
shown in Figure 8; .
Figure 10 is a sectional view taken substan~`
tially on the line III--IU of Figure 9;
Figure 11 is a side elevational view of a double
outlet wall receptacle constructed in accordance
with the teachings of the present invention;
l85 Figure 12 is a sectional view of one of the con
tact units of the structure shown in Figure 11,
taken substantially on the line I2-I2 of Fig
ure 11;
Figure 13 is a plan view of a swivel connector
employed in connection with the terminal con
nector for an electrical iron or the like;
Figure 14 is a sectional view taken substantial
ly on the line I4-I4 of Figure 13, showing in
detail the internal construction of the swivel
connector;
Figure 15 is an elevational view of the swivel
connector construction shown in Figure 14;
Figure 16 is a perspective view of a contact
connector shown in Figure 14;
50
Figure 17 is a perspective detail of one of the
elements of the connector construction shown in
Figure 14;
Figure 18 is an elevational view of a socket for
a trouble lamp or the like, provided with a
55 swivel connector constructed according to the
teachings of the present invention;
Figure 19 is an elevational sectional view of>
the socket shown in Figure 18, taken substantial
ly on the line I9-I9'thereof;
60
The peripheral surface of the cover 8 is pro
vided with a rounded or concaved depressed por
tion I5 which forms a camming surface for guid
ing the prong plugs or the like into the openings
I2, cooperating with the surfaces Il formed by
This provides a substantially
ridge I3.
' the
dished or concaved surface leading to each of
the openings I2, so that regardless of the angu
lar position of the cover 8 with respect to a pair
of prong members which are to be inserted there
in, the camming surfaces will effect rotation of
the cover 8 to align the openings I2 in position
with respect to the prong members which are to
be inserted therethrough.
The cover 8 is rotatable about a centrally ex
tending post or stud member I8, which at its
upper end is provided with a frusto-conical bear
ing surface I1 adapted to engage over a corre
sponding surface formed in a retaining nut I8
having its outer peripheral surface formed to
correspond to the periphery of the opening Ill,
in the present embodiment being hexagonal in
shape. Thus, the nut member I8 rotates with
the cover 8, and has bearing engagement about
the outwardly flared surface I1 of the post I8.
At its lower end, the post I6 is provided with
a portion of reduced diameter, indicated at I8,
which projects through an opening formed in the
base of the receptacle 5, the receptacle 5 bein!
provided with a raised boss portion 20 through
which the portion I9 of the stud I6 extends.
A suitable recess is formed in the outer surface
of the base of the receptacle 5, and is adapted
to receive the normally extending portion 22 of
the prong 6, which lies within this recess, to
prevent rotation of the prong with respect to the 55
receptacle, and the outer projecting end of the
stud I8 is beaded or spun over, as shown at
23, for'. rigidly securing the post in position
Figure 20 is a sectional view taken substan
within the receptacle 5, and at the same time
clamping the prong 6 in nonrotative and fixed
tially on the line 2li-20 of Figure 18, looking
in the direction indicated by the arrows; and
position with respect to the receptacle.
The cover 8, adjacent the opening III, is pro
Figure 21 is a plan view of the insulating mem
ber shown in Figure 19.
65
provided with opposed sloping surfaces I4, which
Referring now in detail to the drawings, the
plug shown in Figures 1 to 4, inclusive, com
prises a receptacle or casing 5, formed of insu
lating material, such as a molded phenol con
densation product or the like, and which is pro
70 vided with a pair of projecting contact prongs
6 and 1, extending in spaced relation from the
lower end thereof, the prongs 6 and 1 being
adapted to enter through suitable openings in a
wall socket or the like to effect electrical contact
75 with the contacts disposed within such an out
vided with a depending centralportion indicated
at 24, which is suitably recessed, as indicated at
25, to provide an annular chamber about the 4stud
I6 in which is disposed a spring member 26,
which bears at its upper end against the lower
surface of the nut member I8, and at its lower
end is biased against a sleeve member 21 extend
ing upwardly about the stud I6, and having an 70
upwardly‘ñared portion cooperating with a cor
responding reduced portion of the recess 25 for
securing it in position with respect to the de
pending portion 24 of the cover 8.
The lower end of the sleeve 21 is spaced a slight 75
2,134,355
distance above the boss 20 formed in the recep
tacle 5, as shown at 28 in Figure 4, and, by
reason of the resiliency ofthe spring member '26,
allows a slight relative movement of the cover
member 8 axially with respect` to the studr I6,
the amount of this movement being limited by
the space between kthe lower end _28 of the sleeve
21 and the upper end of the boss 20. This rpro
vides for spacing the cover`8 a slight distance
3
thereof, first contact clip 38 and its extending>
arms 38 to the arms 48 of the contact clip 4I, andA
thence downwardly through the lfrusto-conical
bearing surfaces 42 and 48 to the terminal
prong
1.
`
'
'
'
The spring .26 presses against the sleeve 21, »
and the'lower end of the sleeve 21 is spaced away
from the boss 20 by reason of the contact clip 4I ,
bearing upon the surface 43. Thus, the spring
away from’the peripheral edge 28 of the recep
tacle 5, whereby its frictional resistanceto rota
pressure serves to press the surface 42 against the 10
tion is materially decreased.
therebetween to insure good electrical conduction
across these surfaces. The friction of rotationV
`
Considering now in detail Figure 3, a pair of
contact fingers, formed from resilient metal
15 stampings, are indicated at 30 and 32, respec
tively, vthe contact ñnger 38 being shown in de
tail in Figure 5.» This contact finger is provided
with a doubled back portion indicated at 30a,
which is adapted to have wiping contact engage
20 ment with a prong member inserted through the
opening I2. 'I'he main portion of the contact
finger 30 extends downwardly along the outer sur
face of the depending portion 24 of the cover 8,
being spaced away therefrom by a laterally bent
portion 33, and having a supporting flange or
tab v34 extending normal thereto and engaging
.about the lower end .28 of the sleeve member 21,
surface 43 to maintain a positive wiping contact
of the cover 8 with respect Ato the receptacle 5 is
taken up between the contact surfaces 42 and 43, 15
and about the outwardly flared surface I1 which
engages the nut member I8. Since the surfaces
are smooth, there is relatively little frictional re
sistance to rotation, inasmuch as the area of the
surfaces is maintained small with respect to the 20
peripheral extent thereof, and consequently the
cover 8 rotates freely about the stem I8, and,
with the grooves formed in the corner, is capable
of readily rotating and positioning itself to ac
commodate contact prongs extending into the 25
openings I2. `The contact fingers 30 and 32,
which rotate jointly with the cover, will thus a1
the flange 34 being apertured to have relatively Y ways be disposed in alignment with the opening
tight fit over the outer surface of the sleeve mem
30 ber 21 and bearing against the projecting portion
28 thereof. It is therefore apparent that an elec
trical circuit can be traced from the contact
prong which enters the opening I2 and engages
the portion 30a of the contact finger 30, through
the contact finger 30 and the sleeve 21 to the post
or stud I6, and then downwardly through the
post or stud to the portion 22 of the contact
prong 8.
‘
The opposite contactfinger 32 is formed in sub
40 stantially the same manner, but is insulated from
the post I 6 by reason of the depending portion
24 of the cover 8, and the insulating member 3I,
the contact finger 32 having a relatively large
opening extending about portion 24 of the cover.
Disposed immediately above the inner extending
flange portion 35 of the contact 32 is a contact
clip indicated in detail in Figure 7. `
This contact clip has bearing engagement on
its lower surface with the uppersurface of the
flange portion 35 of the contact finger 32, the
clip 35 having an aperture 31 formed therein
which engages about the lower end of the de
pending portion 24 of the cover. Formed in
tegrally with the clip 36, and extending laterally
55 and upwardly therefrom are a pair of tongue
members 38, which are provided with rounded
and downturned end portions 39, as shown in
detail in Figure 7. The under surfaces of the
laterally and downwardly turned ends 39 are
60 adapted to receive the upper projecting ends 48
of a second contact clip member 4I, shown in
detail in Figure 6. The contact clip member 4I is
adapted to extend downwardly, having an out
wardly flared ~central portion provided with a
65 raised frusto-conical surface 42. This frusto
conical surfacev 42 is adapted to extend over a
corresponding frusta-conical surface 43 formed
upon a laterallygextending portion y44 of the
prong 1. This frusto-conical portion 43 of the
prong 1 engages about and is secured in contact
with the extending boss 20 of the receptacle 5,
and the inner surfacer of the raised portion 42 of
the contact clip 4I has rotative bearing engage
ment thereabout, thereby extending a circuit
75 from the contact finger 32, flange portion 35'
I2, whereby 4they may be readily engaged by the
contacts extending therethrough.
Referring now to Figures 8 to
same swiveling construction as
embodiment shown in Figures 1
disposed herein, but is shown
30
10, inclusive, the
provided by the
to 7, inclusive, is
as applied to a4
threaded plug instead of a contact prong or push 35
plug. The cover member 45 shown in Figures
8 and 10 corresponds in design to the cover mem
ber 8 of the previous embodiment.
This cover
member is provided with corresponding openings,
for the reception of prong contacts, and has cor
responding contact ñngers 30 and 32 disposed
therein Vand rotatable therewith for extending
40
the electrical circuit from the contact fingers of
a push type or end connection plug of an electric
cord to the connector. The receptacle 48, shown 45
in section vin Figure 10, is substantially cup
shaped in form; and is provided with an outward
ly extending shoulder portion extending under
and aligned with the cover 45. About the cylin
drical portion of the receptacle 46 is disposed a
metallic shell member 41 having threads formed
thereon adapted to be engaged in suitable threads
formed in a wall socket or the like. . This is of
standard construction, and needs no specific de
scription.
‘
n
Adjacent the lower end of >the receptacle 48,
and extending thereacross is an insulating wash
er 48, which is centered about the extending por
tion 49 of the stem I6'. A flanged cup-shaped
member 50 formed of metal, is disposed in in
verted position on the insulating washer 48, and
solder or the like is poured therein, and secures
the head 5I of the ex‘ending portion 48 of the
stud I6’ to the metal cup 50, forming one termi
nal of the plug. The other terminal comprises 65
the laterally extending portion 44’ of a terminalf
contact similar to the prong 1 of the embodiment
shown in Figure 1, whichis bent upwardly at 52
within a suitable cut-out portion of the receptacle
46, and is soldered or sweated to the inner periph 70
ery of the metallic threaded cylinder 41 to ex
tend the electrical circuit from contact 32 to the
threaded member 41 providing the other terminal
of the plug. The washer 48 is secured against
rotation by interlocking engagement with two ex
"le
4
2,134,355
tending tongue portions 53 formed at the lower
end of the receptacle 46. The operation of the
which extends over a pair oi' contact plug ter
structure is the same as described in connection
A ilexible electrical cord is indicated at 13, and
has the conductors 14 and 15 disposed therein in
insulated relationship. This cord 13 is adapted
to enter into a cup-shaped socket 16 through a
resilient supporting means, comprising a spring
with the previous embodiment, the only varia
tion from the structure shown in Figures 1 to '7,
inclusive, being the formation of the terminal
portions of the member, since the prongs 8 and
1 are replaced by the terminals 5i and 41.
Referring now to the embodiment shown in
10 Figures 11 and 12, this shows a duplex type of
wall socket or receptacle provided with swiveling
connections of the type previously described. A
pair of rotatable cover members 55, correspond
'
member 11 provided with an upper flanged cap
member 18 forming a smooth guideway for the
cord 13, to prevent abrasion of the insulation 10
thereof.
The insulated handle 81 is provided with a
recess 19, and the base portion of the recess 19
ing in design and construction to the covers 8
is provided with a raised boss portion 88 corre
and 45 of the previous embodiment, are provided,
sponding to the boss portion 28 of the embodi 15
ment shown in Figures 1 to 12, inclusive. A stud
member 82, corresponding to the stud member
I6, is supported in this raised boss portion, and
and are mounted upon a pair of extending stud
members 56 and 51 secured in a single housing
58 which extends behind the wall plate or facing
plate 58’.
'I'he extending ends of the studs 56
20 and 51 are joined by a substantially T-shaped
connecting member 58, which member has`a
down-turned portion 6| provided with a screw
or terminal lug 62 for securing a conductor there
to. This construction is shown in detail in Fig
25 ure-12. 'I'he other terminal, indicated at 83, cor
at its lower end is connected to a terminalmem
ber 83 having an outwardly extending portion 84
to which the conductor 1I is soldered or other
wise suitably mechanically and electrically con
nected. The stud member 82 at its upper end
has an outwardly ilared head portion 85, which
is engaged by a locking nut member 86 in the
responds to the terminals 44 and 44’ of Figures
3 and 10, but is extended between the two studs
56 and 51, the housing 58 being provided with
the previous embodiment. A rotatable insulat
ing member 81, corresponding to the cover mem
cutout portions indicated at 54, which accommo
bers 8, 45 and 55 of the previously described em
30 date the insertion oi' the terminals 53 thereinto.
same manner as described in connection with
bodiment, is provided with openings 88 through 30
The two terminals 63 of the duplex socket are
which the bared ends of the conductors 14 and
joined by an integral tongue 55, which is provided
15 extend. A spring member 89 is provided for
biasing the nut member 88 upwardly against the
ilanged end of the stud 82, and for pressing
with a terminal nut 66 for connecting an elec
trical conductor thereto.
The internal construction of each of the outlet
sockets formed in the receptacle shown in this
embodiment is the same, and is identical with
the construction shown in the embodiments of
-Figures 1 and 8. Thus, two contact fingers 38
40 and 32 are provided, and are alined for rotation
with the openings I2 formed in the cover mem
bers 55 for engaging contact prongs inserted
through these openings. Also, the bearing en
gagement between the contact clip 4'I and the
45
minals secured to the appliance.
raised bearing surface 43 is the same as previous- _
downwardly upon a sleeve 98 corresponding to 35
the sleeve 21 of the previous embodiment.
A pair of resilient contact iingers 92 and 93
are provided, the contact finger 92 being shown
in detail in Figure 16, and comprising a base
portion extending substantially normal to the 40
stud member 22 and having an enlarged opening
94 therein which is adapted to extend about the
sleeve member 98 and to bear against the flange
95 formed at the lower end of the sleeve member. `
At its upper end, the contact finger member 92 45
ly described, and extends the circuit from the
contact finger’ 32 to the terminal 85. In the
is provided with a notch or similar cutout por
same manner, the circuit from the contact iin
receive the bared end of the conductor. It is
to be understood that any suitable conductor en
gaging means may be provided at the free end 50
ger 38 is extended through the sleeve 21 to the
stud members 56 and 51, and thence through the
50 terminal member 68 to the terminal lug 62.
It will be noted that in each of the three em
bodiments described, the construction of the
swivel connector structure and cover is identical,
being embodied in three different types of re
55 ceptacles. It is thus apparent that the swiveling
connection means of 'the present invention may
be equally well applied‘to a separate contact plug
of the push type or of the threaded socket type,
or may be formed within a wall outlet or recep
60 tacle of either single or duplex construction.
In Figures 13 to 17, inclusive, I have shown a
swivel connector of the present invention as ap
plied to the connection between an electric cord
and an electric iron or similar electrically oper
65
ated appliance. The ordinary type of insulated
tion 95, which is adapted to extend over and
of the contact iinger.
The contact ñnger 92 therefore extends an
electrical connection from the- conductor 15
through the contact finger, through the sleeve
98, and the stud 82 to the terminal 83, and thence
to the conductor 1i. The contact finger 93 is
similar to the contact finger 92, but is provided
with `an enlarged opening of greater diameter
than the opening 94 of the contact finger 92.
This contact ringer is mounted about an extend 60
ing portion of the member 81, which is formed
of insulating material, and is spaced from the
contact ñnger 92 by an insulating member indi
cated> at 91.
The insulating member 91 corre
sponds generally to the insulating member 3|
interposed between the contact fingers 38 and 32
handle or similar disconnect means is shown at
in the embodiment shown in Figures i to l2,
61, having oppositely disposed finger portions 68
inclusive.
and 69. Depending from a recessed portion
lthereof is a relatively strong helically coiled spring
member 18, within which extends the two con
ductors 1I and 12 which extend the circuit to
the electrically operated mechanism within. the
appliance, there ordinarily being a terminal sock
et carried by the resilient spring means 18 and
„
The upper surface of the’ inwardly extending
portion of the contact ñnger 93 is engaged by a 70
contact member indicated generally at 98 in
Figure 17, this member having an opening 99
therein iitting over the lower extending end of
the member 81, and having a pair of upwardly
extending contact fingers |88, which are adapted 75
2,134,355
to be engaged by corresponding upwardly extend
ing arms |02 formed integral with and carried
by a contact member |03 corresponding to the
contact member v4| of Figure 6, the arms |02
corresponding to the arms 40 shown in this fig
ure.
These arms have relative sliding engage
ment therebetween, the lower end of the member
|03 being provided with a raised truste-conical
contact surface |04 adapted to have bearing en
gagement about a corresponding surface |05
formed on terminal member §06 which extends
downwardly through the opening |01 formed be
»lo‘w the recess ‘i9 of the member 6l, and "which is
adapted te be engaged mechanicallyan'd electri»
cally by the bared end of the conductor 1.2.
`
The sont #t linger 93 therefore extends van
electrical circuit- irom the conductor "i4 through
the‘iinger di?, and thence through the Contact
clip 98 and its extending arms E00 to the extend
5
provided with an outwardly ñared head portion
|24 having bearing engagement Awith a ‘nut mem
ber |25. At its opposite end, the stud member
|23 extends'through the boss |22 of the recep
tacle |20, and itshead portion is secured over
and mechanically and electrically connected to
a terminal lug |26, which carries aneyelet |21
at its free end, the eyelet |2'| being adapted to
receive a conductor |28 which is soldered or
otherwise secured thereto. The conductor |28 10
extends upwardly and is connected to the termi
nal |29 of the socket member H2.
n
Extending through the base portion of the re
ceptacle |20 is a second eyelet |30, which is
adapted to receive the conductor | 32, the con
ductor being soldered or otherwise suitably se
cured therein, and extending upwardly and be
ing connected to the terminal H33 of the soclret
H2. The socket |62 is thereby electrically con
20 ing arms lili of the member |03, and thence
' nected to the stud |23 and to the eyelet H30 20
through the corresponding contact surfaces idd
and l05 to the terminal £06 and conductor l2.
The principal features of the construction
shown in Figure 14 correspond to the construc=~I
tion shown in Figures 3 and 1G, the cup-shaped
member l@ being slid downwardly over the mem
ber 8l and engaging bowed portions of the con
tact ñng‘ers .t2 and S3 to force these lingers into
tight contacting engagement with the bared ends
30 of the conductors 'I4 and l5. The cord "i3, the
receptacle lli, the member dl, and the contact
fingers and the member S83 are all rotatable
about the stud 82, so that any tendency oi the
cord lil to twist or llink, is eliminated by this
swiveling connection. 'l‘o disconnect the lamp
cord, all that is necessary is to slide the member
upwardly, which releases the pressure against
the contact lingers 92 and Q3, and allows the
b-ared ends 'lll and lt of the conductors to be
‘g released from the member 8l. @rdinarily how~=
ever, the cord is maintained in connected posi~
tion, the connection to and disconnection lfrom
the appliance being accomplished by the terminal
socket disposed below the spring lil, or by a dis
«titi connect plug carried at the opposite end of the
cord i3, which is engaged within a current-conEn
carried by the receptacle i20'.
Mounted over the boss portion §22, `and rigidly
secured in position by the eyelet E30V is a termi@
nal member i3d, correspondingto the members
i015, 40 and tt of previous embodiments, and 25
f which forms an opposite terminal connection for
the conductor 632„ The trouble lamp cord §35,
which is connected to a suitable'source of elec-î
trical current supply, has the two conductors'
l3t and i3l thereoi‘ connected respectively to 30
the terminals @3S and it@ formed within the
cup-shaped terminal socket idd which surrounds
the conductor 935.
`
A cover member ist, provided with a cylin
drical extending portion, is mounted for rotation
about the stud §23, and the cylindrically extend~
ing portion thereof extends into the receptacle
G25. A pair oi” contact terminals, indicated at
M3 and i463, are connected through stud mem
bers M5 and tdt to ‘œrminal members i4? and
idd, which extend the electrical connections
irom the terminals [H33 and Mt to the terminals
i3d and the stud member' i123, respectively,
through the same type ci contacting engagement
as described in connection with Figures 13 to l'l,
inclusive. The terminal portions iii@ and l“ of
the cover member M2 extend outwardly from
the cover M2, and are provided with annularly
necting receptacle similar to that shown in any
of the embodiments described in connection with
.Figures l to l2.
grooved portions idd, which areadapt'ed to be
it@
lin Figures 18 to 2l, inclusive, l have disclosed engaged with suitable camming terminals or
a swivel connection of the construction described Vplates |50 and ibi connectedto the terminal
previously, adapted for use in a trouble lamp vlugs |30 and E39. These camming terminal
socket or the like.
_
ln this embodiment, a trouble lamp or light
bulb is indicated atv | |0 and is adapted to be ses
cured within a socket H2 carried within a. sub
plates |50 and |56 are so formed that the ter»
mina] portions §43 and |44 may ñrst be posi
tioned and extend therethrough as shown in 55
dotted lines in Figure 20. Upon rotation of the
member §40, which is provided with a shoulder
`upon which the terminal cam plates E50 and |5|
-are supported, the terminals |43 and |44 are
locked, by means of the annular grooves |49 60
formed therein, in the position shown in full
lines in Figure 2U, whereby the member |40, to
The holder H3, below the socket || 2, is pro- ' gether with the conductor |35, is mechanically
vided with a portion H1 of reduced diameter, and electrically connected to the cover |42, and
stantially cylindrical holder H3 having an an-n
nular flange lid at its upper end. Mounted be
low the flange ||4 about the surface of the
holder H3 is a clamp member H5, which is pro
vided with a plurality of guard members H5
forming a cage enclosing the bulb |i0 and pro
tecting the same from mechanical injury.
which at its lower end is provided with an annu
is mounted for' conjoint rotation therewith. 65
la.: peripheral bead || 8 having a corresponding
Since the cover |42 is rotatable about the stem
|23, it is apparent that a swiveling connection is
provided, so that the cord |35 will have no tend
ency to become kinked or twisted. A suitable
annular groove ||9 formed on the inner surface
thereof. A cup-shaped receptacle |20 is adapted
70 to be inserted into the lower end of the holder
|| 3, and is preferably formed of insulating ma
insulating member |55, shown in Figure 21, is 70
terial or the like. This corresponds to receptacle lprovided with opposed cut-out portions
|56'
5 of Figure 1. The member |20 is provided with through which thev terminals |43 and |44 are
a raised boss portion |22, through which a stud adapted to extend down into engagement with
1. member |23 extends, the stud member |23 being
the camming plates |50 and |5|, whereby the 75
2,184,855
member- |40, and terminnal lugs |38 and |38,
are insulated with respect to the cover |42.
In the assembly of the construction shown in
»this embodiment, the socket |I2 is first mounted
in the position shown, with the conductors |32
and |28 connected thereto and being of suñicient
length to extend outwardly of the lower end H8
of the holder. The receptacle member |20 is
then connected, by means of the eyelets |30 and
10 |21, to the conductors |28 and |32, and is then
moved inwardly into locking engagement with
the peripheral bead ||9 of the holder, the con
ductors |28 and |32 being at the same time
forced into the space |51 in the holder.
After the receptacle |20 has been placed in
15
ing cover member having bearing means engag
ing the extending end of said post providing for
rotation of said cover thereabout, said cover
having opposed openings for receiving contact
members carried by said cord, contact fingers
carried by said cover within said receptacle
adapted to be engaged by said contact members,
means for connecting one of said fingers to said
post, means resiliently spacing said cover out
of engagement with said receptacle and provid 10
ing an electrical connection between the other
of said contact ñngers and the other of said
terminal members, and spring means-tending to
urge said cover axially inwardly of said housing.
position, the cover |42 being mounted thereon
for rotation as previously described, the 'con
ductor |35, which has its conductors |38 and
|31 connected to the camming plates |50 and
20 |5|, is locked in position with respect to the ter
minals |43 and |44 by being inserted over the
terminals and then rotated to lock the terminals
in the position shown, as previously described.
3. Means providing a swiveling connection be 15
tween an electric cord and an electrical current
supply outlet comprising a cup-shaped recep
tacle having terminal members extending to the
outer surface of said receptacle, a post extend
ing axially in said receptacle and having en-gagement with one of said terminal members,
an insulating cover member having bearing
means engaging the extending end of said post
This completes the electrical connection to the `providing for rotation of said cover thereabout,
said cover having opposed openings fox-.receiving
light member ||0.
,
contact members carried by said cord, contact
It is apparent that the present invention pro
i vides a basic construction for a swiveling con
nection which may be employed in connection
with a multiplicity of different types of swivel
electrical connections, and which may be dis
posed either at the wall outlet or receptacle, be
fingers carried by said cover within said recep
tacle adapted to be engaged by said contact mem
bers, means for connecting one of said fingers
to said post, means resiliently spacing said cover
out of engagement with said receptacle and pro
ing formed as a part of the wall outlet, or as a
viding an electrical connection within said re
separate and individual prong or push type of
plug or socket type of plug, or may be provided
for effecting connection between an electric sup
ply cord and an electrically operated appliance,
spring means tending to urge said cover axially »
such as a trouble lamp or electric iron or the
like.
-
The principles embodied in the present inven
40 tion, as shown, are applicable to a wide variety
of uses, of which only a few have been shown and
described herein. I therefore do not intend to
limit myself to the exact applications of the
invention which have been .shown and described
45 in detail herein, but only as de?ned by the scope
and spirit of the appended claims.
I claim:
1. swiveling connector means for extending
electrical circuits from a pair of spaced contact
50 members carried by a rotatable insulating rnem
ber to a pair of fixed terminals, comprising a
central post connected to one of said terminals
and having bearing means for supporting said
insulating member for rotation thereabout, a
55 contact sleeve carried by said insulating member
and having contacting engagement with said
post, means for supporting one of said contact
ceptacle between the other of said contact fingers
and the other of said terminal members, and
inwardly of said housing, said spring means
being independent of the electrical circuit
through said connection.
4. In a swivel connector oi' the class described.
means for extending a circuit connection from a ,
rotatable contact finger to a fixed terminal, com
prising a first contact-carrying member having a
contact surface having rotatable bearing con
tact with said terminal, said member having ex
tending contact arms, a second contacting mem
ber mounted for conjoint rotation with said ?rst
contact member and having extending arm por
tions resiliently engaging the arms of said first
member for rotating said first member about
said contact surface upon rotation of said con
tact finger, said second contact member having
a contact surface providing contacting engage
ment with said finger.
5. Means providing a swiveling electrical con
nection between a flexible electric cord and an 55
electrically operated appliance comprising a pair
of terminal conductors connected to said appli
ance, a terminal housing having a recess therein,
ber having rotative contacting engagement with a post member extending centrally of said recess
the other of said fixed terminals, said second _ and connected at its lower end to one of said
conductors, a terminal member connected to the
contact member having opposed diverging con
tact arms, and an intermediate contact member other of said conductors and extending into said
recess, said member having a contact surface
extending between the otherfof said spaced con
tact members and having corresponding arms extending about and insulated from said post, a
rotatable insulating member mounted on said 55
65 resiliently engaging said contact arms, whereby post, contact fingers carried thereby, means car
said second contact member is locked `for con
ried by said insulating member for connecting
joint rotation with said other of said spaced con
one of said fingers to said post, resilient rotat
tact members.
»
able means connected to the other- of said fingers
2. Means providing a swiveling connection be
and having a contact surface .engaging the con
tween
an
electric
cord
and
an
electrical
current
70
>tact surface of said terminal member, and means ‘
supply ‘outlet comprising a cup-shaped recep
members on said sleeve, a second contact mem
tacle having )terminal members extending to the
outer surface of said receptacle, a post extending
axially in said receptacle and having engagement
` with one of said terminal members, an insulat- '
for connecting the electrical cord to said contact
fingers including an enclosing insulating mem
ber extending downwardly over said rotatable
~member and urging said contact fingers into
7
L 21,134,355l _
tight contacting engagement with the conductors
carried in said cord.
_
6. Means providing a swivel connection be
tween a trouble lamp and an electric two-con
ductor cord comprising ay lamp holder, a socket
therein, a receptacle carried by said holder,
terminal means on said receptacle electrically
connected to said socket, a cover for said recep
tacle >having contact members carried thereby,
10 said cover being rotatable coaxially of said re
lugs in all rotative positions of said covers.
9. In a device of the class described, a cup
portion of non-conductive material, a'plug p0r
tion of non-conductive material having substan
tially its entire body'- rotatably mounted in~ said
cup portion, an elongated metallic sleeve mount
ed in said> plug portion, a metallic shaft element
plates connected- thereto, said camming plates
operatively secured at one end to said cup por
tion and having a substantial portion of its length
journaled in said sleeve, a means for limiting the
longitudinal sliding ‘movement of, said plug por
tion relative to said cup portion in both direc
tions, a metallic collar ñxed to the inside bottom 15
being adapted to connect the conductor of said
cord to said contact members and to lock said
said shaft element and said plug and cup por
tions, a metallic ring rotatably mounted around
ceptacle, means carried by said cover for elec
trically connecting said contact members to said
terminal means in all rotative positions of said
cover, and an end connection for said cord com
16 prising a pair of terminal lugs having camming
end connection of said cord for conjoint rotation
20
to said terminal means, said contact lingers being
electricallyconnected to the respective terminal
with said cover,
`
`
’
7. An electrical Wall receptacle for providing
a plurality oi wall outlet connections comprising
a wall plate, an insulating housing secured there
to, said housing having a plurality of spaced re
25 cesses therein havingA terminal means including a
post extending axially through each of said re
cesses, said terminal means having a common
terminal tor said posts, insulating covers for each
oi said recesses mounted for rotation on said
di) posts, spring means about said post holding said
covers out oi’ irictional engagement Withsaid
housing driving rotation thereof, contact means
carried by each of said covers and disposed within
said recesses,\and means for maintaining electri
cal connection between said contact >means and
said terminal means during rotation oi said
covers.
3. Swiveling connector means comprising a
wall plate, an insulating housing secured thereto
dit and having spaced cylindrical recesses formed
therein and alined with openings in said plate,
terminal posts extending centrally through each
oi said recesses, cover members disposed in said
openings and rotatably mounted on said posts,
opposed contact iingers carried by each of said
covers and rotatable therewith within said re
cesses, said cover member having openings there
through providing for access to said contact ‘iin
gers Within said recesses, a common terminal
iug for said terminal posts, means for connect
ing one of said contact iingers in each of said
recesses to said posts, terminal means in each of
said recesses insulated from said posts and hav
ing a common terminal lug, and rotatable resil
55 lent contact means carried by each of said covers
for connecting the other of said contact fingers
of said cup portion arranged concentrically with
said collar, two spring arms diametrically extend
ing from said ring member, an elongated metallic 20
member having notches in both of its ends for
receiving the outer end portions of said spring
arms respectively, an electricity conducting mem
ber connected to said elongated metallic member,
an electricity conducting member leading from 25
said sleeve, an electricity conducting member
electrically connected to said shaft element, and
an electricity conducting member connected to
said collar.
lo. In a device of the class described, a cup 30
portion of non-conductive material having a hol
low projection arising from its inside bottom, I
a plug portion of non-conductive material hav
ing substantially its entire body rotatably mount
ed in said cup portion, an elongated metallic sleeve 35
mounted in the center portion of said plug portion,
a metallic shaft element secured to said cup por
tion and extending through said sleeve, a means
for limiting the longitudinal sliding movement of
said plug portion relative to said cup portion in 40
both directions, a cone shaped metallic collar
fixed around the said projection arising from the
inside bottom of said cup portion, a metallic ring
rotatably mounted around said metallic collar,
two spring arms diametrically extending from 45
said ring, an elongated metallic member having
notches in both of its ends and receiving the
outer end portions of said spring arms respective
ly, an, electricity conducting member connected
to said elongated metallic member, an electricity 50
conducting member leading from said sleeve, an
electricity conducting member >electrically con
nected to said shaft element, and an electricity
conducting member connected to said collar.
55
ALBERT E'. CALDWELL.
CERTIFICATE _CF CORRECTION.
Patent No. 2,15Lh555.
october 25, 1958.
ALBERT E.. CALDWELL.
It ishereby certified that error-L appears in the printed- specification
of the above numbered patent requiringco'rrection as foll'ows :.'Page 'I , first
column, line 52, claim?, for the word "drivingf‘ read during; and that the
said Letters Patent shouldbe read with this correction therein. th'at the.
same may conform to the record of the case in the Patent Office.
Signed and sealed this 6th day of December, A. D. 1958.
Henry Van Arsdale
(Seal)
Acting Commissiener ef Patents.
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