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Патент USA US2128112

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23, 1938.
- 1
w.A H. BARLow4
Filed. March 25, 1937
Patented Aug. 23, 1938
I 2,128,112-
William H. Barlow, Middlebury, Conn., assignor
to Scovîll Manufacturing Company, Water
bury, Conn., a corporation of Connecticut'
Application March 25, 1937, serial No. 133,048
(ci. 24-126)
8 Claims.
The present invention relates to connecters or
splicers for electrical wires, cables and the like,
and has for an object to simplify and cheapen the
construction» of these. devices and at the same
5 time to provide a more eilicient and adaptable
connecter or splicer for wires and cables of vari
ous sizes within the range of the device.
. Another object of this invention is to provide a
combined spring seat or cup and jaw coupling
.Il which may be made in one piece'of sheet metal;
eliminating the separate cups now used and pro
viding means forl insuring proper alinement be
tween the spring and the jaws and proper follow
ing of the jaws when the spring cup is retracted.
The invention provides a sheet metal cup and
cooperating jaws, so constructed as to permit the
easy assembly of the jaws on the cup and to main
tain the jaws in proper alinement and at the same
time permit a certain amount of bodily radial ac
20 tion required to accommodate the jaws to wires of
one of the jaws, looking at the inner side of the
Figure 5 is a detail enlarged perspective view
of the sheet metal combined spring cap and jaw
retainer, and '
` Figure 6 is a detail sectional perspective view
of the same.
Referring now to the drawing, 10 designates a
casing which may be of tubular form and which
has its opposite end portions I I tapered or gradu
ally reduced to provide jaw contracting portions
having reduced end openings l2 for the reception
of the ends of wires, cables or the like.
An ex
panding helical spring I3 is disposed vin the in
termediate portion of the casing I0 and normally
exerts an outward pressure toward the opposite
end tapering portions Il.
At each end of the spring I3 is placed a com
bined spring cap and jaw retainer. This device
may be made of one piece of sheet metal and has 20
a cap portion I4 having a sliding flt in the casing
Anotherobject is to provide an improved jaw f I0 and engaging over the adjacent end of the
spring I3 to take up the end thrust thereof and
structure which permits the jaws to be manu
factured inexpensively each from a forging piece; hold the spring I3 in proper alinement within the
instead of having to either make the jaws by the casing I0.A The' bottom wall of the cap I4 has a
central projection I5 providing the jaw retainer.
, screw machine'method from rod stock and sub
sequent machining operations, or to make the This projection I5 is of reduced diameter from.
jaws from a forging as now practiced requiring the cap portion I4 to accommodate the inner ends
of the jaws thereabout and is adapted tol ap
subsequent machining operations.
With the foregoing and other objects in view, proach to a more or less extent into the adjacent
the invention will be more fully described herein' tapering end portion I I of the casing. Each com
after, and will be more particularly pointed out bined spring cap and retainer carries a group of
different sizes.
in the claims appended hereto.
jaws _ i6, three being shown in each group in the
In the drawing. wherein like symbols refer to
35 like or corresponding parts throughout lthe sev
eral views.
Figure 1 is a side elevation, partly in section of
a connecter or splicer embodying the features of
this invention, the end in section showing the
40 parts in projected position ready to receive a wire
or cable, and the other end showing in dotted
lines the parts in clamping position upon the end
present instance.
The jaws I6 extend outwardly in_to the taper
ing end portion II of the casing and approach
the end opening I2 and have beveled inner Walls
I1 for receiving the extremity of the wire I8 or
the like as the latter is inserted through the open
ing I 2 to retract and expand the jaws for receiv
ing the wire I8 therebetween. The major for
ward portions of the jaws I6 have outer tapering
-sides conforming substantially to the tapering
of a wire or cable.
inner wall of the end portion I I of the casing and
Figure 2 is a longitudinal section taken through the inner faces of thevjaws I6 _are transversely
the connecter axially at right-angles to the show- ' corrugated to provide gripping surfaces I9 for
ing in Figure 1, showing at the left end the parts engagement with the wire I8 to hold the latter
retracted with a wire therein ready to be clamped, firmly4 in the connecter and make the desired
and showing at the right end the parts in clamp
electrical contact therewith when the device is
50 ing positionvupon the-end of a wire, the section used for that purpose. The rear end portions of
taken on line 2-2 of Figure 1.
Figure 3 is 'a transverse enlarged section taken
through one end portion of the connecter on the
ine 3-3 of Figure 1, showing the jaws collapsed.
Figure 4 is a detail enlarged perspective view on
the jaws I6 have outer substantially cylindrical
surfaces to lie with the confines of the cap portion
I4 and are recessed at their inner sides to accom
modate the retainer portion I5 therebetween.
Each' jaw I6 has an inwardly and radially ex
tending stud 20 at its inner end which slidably
and somewhat loosely engages in an _,r adjacent
opening 2| provided in the side wall of the re
tainer portion I5. These studs 20 and openings 2|
are so relatively disposed on lthe jaws I6 and
jaws -I8 until the extremity of the wire I8 engagea
retainer portion I5, respectively, that the rear or
the left hand end of Figure 2.
inner extremities of the jaws I6 are held in spaced
relation from the spring cap I4 to admit free piv
otal action oi' the jaws I6 on the studs 20 at all
10 times, whether the jaws I6 are under tension oi'
the spring I3 or the_jaws I6 are retracted by
pressure of the wire against the end of the re
tainer portion I5, as shown at the left hand end
' in Figure 2. Furthermore, the studs 20 permit a
free radial movement of the jaws I8 about the
projection I5 to accommodate the jaws to wires
and the like of various sizes within the limits of
the connecter and also to the tapering cross
sectional area of the casing end II. The studs
20 have a radial sliding fit in the openings 2| of
the retainer portion I5,.have a pivotal movement
to admit the independent swinging and settling of
the jaws I6 on the wire I8 and against the taper
ing casing end II, and also are permitted ample
25 rocking or canting movement to permit the neces
sary freedom oi’ the jaws I6 to move in all direc
tions. 'I'he studs 20 also insure that the jaws I6
remain coupled to the spring cap I4 in 'all ad
justments of the jaws, and the combined spring
30 cap I4 and jaw retainer projection I5 and the
jaws I6 with their studs 20 are so relatively pro
portioned to the casing I0 that the jaws I6 are/
held from separation from the retainer projec
tion I5 while the parts are assembled in the cas
ing I0.
The casing I0 has a longitudinal slot 22 near
each end substantially registering with-the com
bined spring cap and jaw retainer so that a suit
able implement may be introduced through the
40 slot 22 between the cap portion I 4 and the inner
ends of the jaws I6 for retracting the combined
member Il, I5 against the tension of the spring
I3 to loosen the jaws I6 from the end of the wire
I8 when it is desired to free the same.
tapering casing end II to permit the jaws to be
cammed apart by their bevel edges I'I. At this
time the wire I8 may slide backwardly between the
'I'he sheet metal cap Il with its projection I5
admits of ease in assembling the parts of the con-r
necter and keeps the jaws I‘S in proper alinement.
yet allows all necessary radial, pivotal and rocking
movements o_f the jaws I6 to accommodate them
5.0 to different size wires or the like.
’I'his construction also permits the jaws I6 each
to be manufactured inexpensively from a single
forging piece without subsequent machining oper
ations, the stud 20 being forged with the jaw I 6
55 as a part thereof.
As shown in Figure l, at the left hand end there
of, when the connecter is not in use the jaws I8
are projected outwardly by the spring I3 into the
tapering end II of the casing until the jaws I5
are collapsed into contact with one another. The
jaws I6 are held in this projected position by
the spring I3 acting through th combined spring
cap Il and its jaw retainer projection I5, it being
noted that the inner ends of the jaws I6 ar
held from contact with the cap I4 by the radial
studs 20. 'I‘he jaws I8~are permitted »free swing
ing, tilting and radial movements in settling into
the tapering end >I I of the casingand against one
another. The outer end bevel faces I'I of the
70 jaws I‘8 are -located adjacent the opening I2 and
are adapted to receive the extremity of a wire or
cable which may be forced through the opening
I2. The introduction of the wire I8 first retracts
the jaws I6 against the tension of the spring I3
75 until the jaws I6 are retracted sufficiently into the
the end of the retainer projection I5, as shown at
By forcing the wire I8 a short distance farther
into the connecter the combined spring cap Il
and jaw retainer I5 is retracted against the ten
sion of the spring I3 and the jaws I6 are freed 10
or loosened from the tapering wail of the cas
ing end II and may settle into proper positions
about the end of the- wire I8. With the jaws I8
in position about the wire I8, the pressure on the 1
wire may now be relaxed and the spring I3 per 15
mitted to expand and move the combined cap i4
and retainer I5 outwardly to force the jaws I8
toward the tapering end of the casing portion II
with the result that the jaws I 6 are contracted
upon the wire I8 and bind the gripping surfaces 20
I9 thereon to ñrmly hold the wire I8 in the con
necter and with a gripping and wedging action
proportionate to the outward pull on the wire I8,
as shown in the right hand ends of Figures Al and 2.
To release the wire or cable I8 from the con 25
necter, a suitable implement is introduced through
the adjacent slot 22, and into the space between
the inner ends of the jaws I8 and the spring cap
Il, and pressed against the cap I4 to retract the
same against 'the tension of the spring I3. This 30
operation withdraws the jaws I6 within the tap
ering casing end II and releases the pressure ofv
the jaws I6 from the wire I8. Holding the jaws
I6 thus retracted, the wire I8 may be easily pulled
out of the connecter.
The jaw retainer projection I5 may be pressed
from the bottom of the spring cap portion I4
and the radial openings 2| be punched therein,
so that the combined cap and retainer may be -
inexpensively manufactured from sheet metal and
the projection I5 be of sumciently reduced di 40
ameter to fit between the inner ends of the jaws I 8
and provide an annular cup bottom of sui'ilcient
width to cover the end of the spring I 3.
The recesses in the rear ends of the jaws I8
are of sumcient length to leave a space I8l at the 45
outer end of the jaw retainer projection I5 for
the extremity of the wire or cable I8 so that.
should the extremity of the wire or cable become
misshapen or unravelled, the distorted or frayed
end of the wire or cable will not engage the grip 50
ping surfaces I9 of the jaws and prevent the uni
form and even gripping of the jaws I6 on the wire
or cable throughout the entire length of the grip
ping surfaces I8.
What is claimed is:
1. A connecter for wires, cables and the like,
comprising a casing having a tapering open end,
an expanding spring in the casing, cooperating
jaws disposed in the tapering end of the casing
andy having studs at their inner- ends extending
radially inward, and a combined spring seat and
jaw connecter having a cup portion receiving the
end of the spring and- having a radially aper
tured lhollow projection from the bottom of the 65
cup receiving the radial jaw studs to connect the
jaws to the cup portion and hold the jaws in rela
tive longitudinal alinement for radial and pivotal
and rocking adjustments when shifted in the ta- ’
pering end of the casing to receive and clamp upon v70
the end portion of a wire.
y .
2. In a wire connecter, the combination of a
casing having a tapering open end to receive a
wire, a group of jaws slidably disposed'ln the ta
pering end oi' the casing to receive the wire there 75
between and having inwardly directed studs on
their inner ends, _an expanding spring in the cas
ing, and a sheet metal cap fitting over the end oi
the spring to provide a seat therefor and having
a reduced cylindrical projection pressed outward
1y from the bottom of the cap and engaging be
tween the inner ends of the jaws and having
radial openings in the side walls of the projection
receiving said jaw studs to connect the jaws to
10 the cap with free pivoting and tilting and radial
movements of the jaws relative to the .cap and to
one another during the gripping of the jaws on
the wire.
3. A wire connecter comprising a tubular cas
ing having an open tapering end, an expanding
spring in the casing, a cap fitted to the end of the
spring and having a central straight sided bottom
projection with radial openings therein, and a
groupof jaws in the tapering end of the casing,
said jaws having recessed inner rear portions re
ceiving said projection of the cap and having
round studs pivotally and tiltably and slidably en
gaging in the radial openings of the projection to
retain the jaws in relative alinement and to the
25 cap at all times.
4. A combined spring cap and jaw assembly for
connecters of the type having a tubular casing
with a tapering open end and an expanding spring
in the casing, comprising a group of forged jaws
30 adapted to be positioned in the tapering end of
the casing and having recessed inner walls at their
rear ends and inwardly extending studs forged
thereon in the recesses, and a sheet metal cap
said slot that a releasing tool may be inserted
through said slot and positioned in the space be
tween said cap and the inner ends of said jaws.
6. A connecter for wires and the like compris
ing a tubular casing having an open end, ¿plu Ui
rality of clamping jaws in said casing and mov
able longitudinally thereof, means carried by said
body engageable with said jaws to move said jaws
to _clamping position upon outward movement of
said jaws, said jaws having reduced transversely 10
curved inner ends, an expanding spring in said
body constantly urging said jaws to clamping po
sition, a sheet metal cap interposed between said
spring and said jaws, said cap having a cylindri
cal outer portion slidably engaging said casing
and a cylindrical axial projection engaging with
in said reduced jaw ends, said projection having a
plurality of clrcumferentially spaced apart open
ings, and radial studs carried by the reduced ends
of said jaws loosely engaging in said openings.
7. A connecter for wires and the like compris
ing a hollow body open at one end, a plurality of
clamping jaws in said body and movable longi
tudinally thereof, means carried by said body en
gageable with' said jaws to move said jaws to 25
clamping position upon outward movement of
said jaws, said jaws having reduced inner end
portions, an expanding spring in said body con
stantly urging said jaws to clamping position, a
member interposed between said spring andv said 30
jaws, said member having a cylindrical surface
slidably engaging said body, an axial projection
integral with said member overlapping the re
duced end portions' of said jaws, said projection
adapted to engage over the adjacent end of the
spring and having an axially disposed bottom pro ` having radial holes therein, and pins carried by
said reduced end portions of said jaws engaging in
jection of reduced diameter to engage in the re
cessed ends of the jaws, the outer surface oi' said said holes, s_aid pins connecting said jaws to said
projection being disposed in parallel relation to member for swinging movement relative thereto.
8. A wire connecter, comprising a tubular cas
the axis of said casing, said projection having ra
dial openings for thereception of the jaw studs ing having a tapering end portion to receive a wire 40
therein, a group of jaws slidably disposed in the
to hold the same assembled on the cap and in rel
ative alinement in the tapering end of the casing. tapering end portion of the casing and having in
ner beveled faces at their outer ends adapted to
5. A connecter for wires and the like, com
prising a tubular casing having a tapering open receive the extremity of the wire thereagainst for
end and a longitudinal slot adjacent said tapered retracting and expanding the jaws, said jaws hav 45
ing inwardly extending radial studs at their in
portion, a plurality of jaws disposed in said taper
ing end provided with reduced arcuate inner end ner ends, an expanding spring mounted in the
portions, an inwardly projecting pin carried by casing, a cap seated over the adjacent end of the
the reduced inner end of each jaw, a sheet metal spring and having a jaw coupling portion pro
cylindrical cap slidable in said casing, a reduced jecting between the inner ends of the jaws and
hollow extension integral with said cap engaging having radial openings therein for the reception
within said reduced inner end portions of said of said jaw studs to couple the jaws to the spring
jaws, said extension having openings to receive cap for longitudinal movement therewith, space
said pins, said openings being so disposed as to the jaws eqùidistantly about the coupling portion
position the inner end portions in outwardly and to admit independent pivotal and radial ,tilt
spaced relation to the adjacent end oi' said cap, ing movements of the jaws in settling about the
wire and against the inner wall of the tapering
and an expanding spring having an end there
of engaging within said cap, said .jaws when in end portion of the casing.
clamping position being so positioned relative to
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