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Патент USA US3056949

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Oct. 2, 1962
3,056,940
a. J. wlNl-:sTocK
SELF-ALIGNING COAXIAL CONNECTOR
Filed May 9, 1960
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3,056,940
Patented Oct. 2, 1962
2
3,056,940
SELF-AUGNÍNG COAXIAL CONNECTOR
FIG. 2 is an enlarged detail view, mostly in section, of
the embodiment of FIG. 1 with the plug and jack termi
nals assembled; and
Bernard J. Winestock, Los Angeles, Calif., assignor to
FIG. 3 is a side view, partly in section, of the embodi
ment of FIGS. l and 2, illustrating connector relation
ships which may result from terminal misalignment.
Filed May 9, 1960, Ser. No. 27,954
As particularly shown in the drawings, this novel con
10 Claims. (Cl. 339-64)
nector assembly is generally comprised of a terminal plug
10 and a terminal jack 11, so designated because of the
This invention relates to electrical connectors and more
specifically involves a coaxial self-aligning connector as 10 internal connection formed between terminal contacts 12
and 13. The outer coaxial contacts 14 and 15 are re
sembly that may be used under conditions of severe
ceived within an expansible, electrically conductive sleeve
mechanical vibration.
16, thereby forming an electrical coaxial connection.
Ordinary coaxial connector terminals must be precisely
The terminal plug 10 includes an outer conductive
aligned in order to complete a connection. For this rea
son the uses for coaxial connectors have been generally 15 sleeve 20 that terminates in a rounded contact rim 21,
forming the outer coaxial contact 14. Sleeve 20 has a
limited to situations Where the terminals were manually
hub portion 22 with a collar 23 and a threaded section
connected, since an operator could then radially move
spaced therefrom. This construction enables the sleeve
one terminal (usually the plug) until the parts were pro
to be clamped to a base plate 24, with a nut member
perly aligned. It would be practically impossible, how
ever, to employ the ordinary coaxial connectors Where 20 25, as shown.
Plug 10 also comprises a conductive brush contact 26
connections are mechanically operated since a slight axial
mounted from within sleeve 20 and insulated therefrom
misalignment of parts would prevent the connection from
by a spacer sleeve 27 and a washer member 28. Brush
being completed. Inasmuch as an axial misalignment
Contact 26, which forms the inner coaxial Contact 12,
could be produced merely by mechanical vibrations it
should be expected that the range of practical use for 25 comprises an adapter 29 and twisted, resilient core Wires
30 having radially projecting wire members 30a. Each
coaxial connectors has been extremely limited.
wire 30a forms a point contact with the receptacle of
One specific application which is contemplated for this
terminal jack 11.
’
invention is in the field of guided missiles where severe
Cole Electric Company, Culver City, Calif., a corpora
tion of California
The terminal plug may be connected to a coaxial con
and tests have shown that a coaxial connector as herein 30 ductor 31 in the conventional manner shown. The outer
mechanical vibrations are prevalent. Experimentation
described may be satisfactorily employed under even these
most extreme conditions of operation.
In brief, this invention in electrical connector assem
conductor member 32 is clamped between a ferrule 33
and a fastening sleeve 34, which in turn is threaded to
sleeve 20. The inner conductor member 35 projects
axially through an insulation core 36 and may be soldered
for completing a coaxial connection. Both terminals have 35 to the brush adapter 29.
Jack terminal 11 comprises an outer conductive sleeve
outer rim surfaces that are embraced by an expansible
40 that has a rounded contact rim 41, forming the outer
contactor sleeve to provide an exterior connection. Since
coaxial contact 15, and includes a hub portion 42 with
the sleeve may be pivoted about the terminals, the con
nector assembly will correct itself for misalignments of 40 a collar 43 and a threaded portion spaced therefrom.
Sleeve 40 may then be clamped to a base plate 44 by means
comparatively large magnitude. In addition, an interior
of a nut member 45.
terminal connection is completed between a conductive
A conductive receptacle 46 is mounted from within
brush member and a conductive receptacle, which are
sleeve 40 and is insulated therefrom by a non-conductive
respectively mounted centrally of said plug and jack
terminals. The brush member is comprised of a plurality 45 spacer sleeve 47 and washer member 48. Receptacle
46 is adapted for receiving the brush contact of terminal
blies comprises a mating pair of plug and jack terminals
of twisted core wires having radially projecting ends that
engage the receptacle when the terminals are mated. The
internal connection formed thereby will possess the ad
plug 10, and is also adapted for being soldered to the cen
tral conductor member 49 of a `second coaxial conductor
50. The connection of conductor 50 to the jack terminal
sures and low overall forces, while also producing termi 50 is in all other respects similar to that used for joining
conductor 31 to the terminal plug. The outer conductor
nal flexibility that will compensate for misalignments be
51 is clamped between a ferrule 52 and a fastening sleeve
tween those parts. The individual attributes of the in
53 that is also threaded to sleeve 40, an insulating core 54
terior and exterior terminal connections cooperate in a
separating conductor members 49 and 51.
unique manner providing a self-aligning coaxial connec
The expansible electrically conductive sleeve 16 em
tor that may be constructed to possess superior opera
braces contact rims 21 and 41 with a resilient biasing
tional characteristics under extreme conditions of me
force provided by a pair of garter springs 60. Sleeve 16
chanical vibration.
vantages of providing multiple contacts, high local pres
A primary object of this invention, then, is to provide
is longitudinally segmented and circumferentially grooved
being adversely affected and while maintaining electrical
intermediate the respective points of contact between
nections of the plug terminal illustrated by broken lines;
cavity 62, although allowing limited longitudinal move
for receiving these garter springs. It will be further ob
a self-aligning coaxial connector assembly.
served from FIGS. 2 and 3 that when terminals 10 and 11
60
Another object is to provide a coaxial connector assem
are mated, garter spring 60 will apply a biasing force
bly that will withstand severe vibrational strains without
sleeve 16 and the contact rims 21 and 41. This facet of
conductivity.
the construction is an important factor in deriving the
Other objects of this invention will become apparent
65 optimum benefits under conditions of severe mechanical
in View of the following description.
vibrations.
In the drawings forming a part of this application, and
A housing plate 61 is employed for mounting the ex
in which like reference numerals are used to indicate like
pansible sleeve 16 to the plug terminal 10. A cavity or
parts throughout the same,
slot 62 is formed in plate 61 with a lipped opening 63 on
FIG. l is a side View of one embodiment of this inven
tion in electrical connectors, showing the plug and jack 70 the side remote from plug 10. The peripheral surface
that defines the opening 63 confines the sleeve 16 within
terminals in a spaced relationship and with interior con
3,056,940
3
ment of the sleeve and the insertion of sleeve 40 there
through. The lipped opening is preferably recessed by
ltrically conductive sleeve adapted for embracing said
rounded contact rims, said expansible sleeve being longi
counterboring to guide the jack sleeve 40 into the open
ing, thereby facilitating the `connector’s operation. Also,
contraction; and stop means fixed relative to said ter
tudinally slidable on said contact rims and biased into
the cavity is formed suñiciently larger than the diameter
of sleeve 16 to allow said sleeve to be freely pivoted about
the contact rim 21 with limited universal movement.
Housing plate 61 may be attached to the base plate 24
minal plug and engageable with said expansible sleeve
for limiting the free longitudinal movement thereof, said
stop means holding one end of said expansible sleeve into
embracement with said plug contact rim, the opposite
end projecting angularly beyond the coaxial contact of
by conventional means such as the threaded screw con
nections generally indicated by reference 6d.
l0
With an electrical connector of the kind described and
illustrated, it will -be apparent, particularly in view of
FIG. 3, that a connection can be formed even though the
terminal contacts of connectors .10 and 11 may be out of
alignment.
Since »the expansible sleeve 16 can swivel
upon the contact rim Z1, the sleeve can assume a posi
tion satisfactory for receiving contact rim 4l. Also, in
asmuch as the brush contact 26 is flexible, being com
said plug.
4. A vibration resistant, self-aligning, coaxial con
nector assembly, comprising: a terminal jack formed
with an outer conductive sleeve terminating in a rounded
contact rim, said jack having a conductive receptacle
mounted within said sleeve and insulated therefrom; a
terminal plug formed with an outer conductive sleeve ter
minating in a rounded contact rim, said plug having a con
ductive coaxial contact mounted from within said sleeve
and insulated therefrom, said coaxial contact being sup
ported at the end of a resilient stern extending outwardly
prised of resilient wire members, this contact may adapt
itself to an axial misalignment of receptacle 46.
In View of the above description, and although only a
beyond said plug contact rim and adapted for being re
preferred embodiment of the invention has been illus
ceived by said receptacle; an expansible electrically con
Itrated and described, it is to be realized that certain
ductive sleeve adapted for embracing lsaid rounded con
changes in the shape, size and arrangement of parts may
tact rims, said expansible sleeve comprising at least two
be resorted to without departing from the spirit of the 25 longitudinal lsegments and being longitudinally slidable
invention or the `scope of the attached claims, and each
on said contact rims, spring means for biasing said seg
of such changes is contemplated.
ments into contraction upon said contact rims; and stop
Having thus described my invention, what I claim and
means ñxed relative to said terminal plug and engageable
desire to secure by Letters Patent is:
with said expansible sleeve for limiting the free longitu
1. A vibration resistant, self-aligning, coaxial con 30 dinal movement thereof, said stop means holding one end
nector assembly, comprising: a terminal jack formed
of said expansible sleeve into embracement with said
with an outer conductive sleeve terminating in a rounded
plug contact rim, the opposite end projecting angularly
contact rim, said jack having a conductive receptacle
beyond the coaxial contact of said plug.
5. A vibration resistant, self-aligning, coaxial connector
35 assembly, compirsing: a terminal jack formed with an
nating in a rounded contact rim, said plug having a co
outer conductive sleeve terminating in a rounded contact
axial contact mounted from within said sleeve and insu
rim, said jack having a conductive receptacle mounted
lated therefrom, said coaxial contact being supported at
within Isaid sleeve and insulated therefrom; a terminal
the end of a resilient stem extending outwardly beyond
plug formed with an outer conductive sleeve terminating
said plug contact rim and adapted for being received by 40 in a rounded contact rim, said plug having a conductive
said receptacle; an expansible electrically conductive
brush resiliently mounted from within said sleeve and in
sleeve adapted for embracing said rounded contact rims;
sulated therefrom, said brush comprising twisted core
mounted within said sleeve and insulated therefrom; a ter
minal plug formed with an outer conductive sleeve termi
and means for holding one end of said expansible sleeve
wires having radially outward projecting wires and
into embracement with said plug contact rim, the op
posite end projecting angularly beyond the coaxial con
-tact of said plug.
2. A vibration resistant, self-aligning, coaxial con
nector assembly, comprising: a terminal jack formed
adapted for being received by said receptacle; and an ex
rwith an outer conductive sleeve terminating in a rounded
contact rim, said jack having a conductive receptacle 50
mounted within said sleeve and insulated therefrom; a ter
minal plug formed with an outer conductive sleeve ter
minating in a rounded contact rim, said plug having a
conductive brush resiliently mounted from within said
sleeve and insulated therefrom, said brush comprising
twisted core wires having radially outward projecting
wires and adapted for being received by said receptacle;
an expansible electrically conductive sleeve adapted for
pansible electrically conductive sleeve adapted for em
bracing said rounded contact rims; whereby said brush
wires will flex to assist mating of said terminals; an ex
pansible electrically conductive sleeve adapted for em
bracing said rounded contact rims, said expansible sleeve
comprising at least two longitudinal segments and being
longitudinally slidable on said contact rims, spring means
for biasing said segments into contraction upon said con
tact rims; and stop means fixed relative to said terminal
plug and engageable with Vsaid expansible sleeve for lim
iting the free longitudinal movement thereof, said stop
means holding one end of said expansible sleeve into em
bracement with said plug contact rim, the opposite end
projecting angularly beyond the brush of said plug.
embracing said rounded contact rims; and means for hold
6. A vibration resistant, self-aligning, coaxial con
ing one end of said expansible sleeve into embracement 60 nector assembly, comprising: a terminal jack formed
with said plug contact rim, the opposite end projecting
with an outer conductive sleeve terminating in a rounded
angularly beyond the brush of said plug; whereby said
brush wires will flex to assist mating of said terminals.
3. A vibration resistant, self-aligning, coaxial con
nector assembly, comprising: a terminal jack formed
with an outer conductive sleeve terminating in a rounded
contact rim, said jack having a conductive receptacle
mounted within said sleeve and insulated therefrom; a
terminal plug formed with an outer conductive sleeve
terminating in a rounded contact rim, said plug having
a conductive coaxial contact mounted from within said
contact rim, said jack having a conductive receptacle
sleeve and insulated therefrom, said coaxial contact being
mounted within said sleeve and insulated therefrom; a
supported at the end of a laterally resilient stem extending
terminal plug formed with an outer conductive sleeve ter
outwardly beyond said plug contact rim and adapted for
minating in la rounded contact rim, said plug having a 70 being received by said receptacle; an expansible electri
conductive coaxial contact mounted from within said
sleeve and insulated therefrom, said coaxial contact being
supported rat the end of a resilient stem extending out
cally conductive `sleeve adapted for embracing said
rounded contact rims, said expansible sleeve comprising
at least two longitudinal segments and being longitudinally
wardly beyond said plug contact rim and adapted for
slidable on said contact rims, spring means for biasing
being received by said receptacle; an expansible elec 75 said segments into contraction upon said contact rims;
3,056,940
5
said spring means comprising at least one coil garter spring
disposed axially of said expansible sleeve at a position
intermediate the respective points of contact between
said sleeve and said contact rims, and means for holding
one end of said expansible sleeve into embracement with
said plug contact rim, the opposite end projecting angu
larly beyond the coaxial contact of said plug.
7. A vibration resistant, self~aligning, coaxial con
nector assembly, comprising: a terminal jack formed
6
an outer conductive sleeve terminating in a rounded
Contact rim, said jack having a conductive receptacle
mounted within said sleeve and insulated therefrom by
a spacer sleeve and a washer member, said outer con
ductive sleeve having a hub portion provided with a
collar and a threaded section spaced therefrom, a nut
me aber adapted to be threaded upon said hub for fasten
ing said jack to a base plate, said plate being clamped
between said collar and said nut member; a terminal plug
with an outer conductive sleeve terminating in a rounded 10 formed with an outer conductive sleeve terminating in a
contact rim, said jack having a conductive receptacle
mounted within said sleeve »and insulated therefrom; a
rounded contact rim, said plug having a conductive brush
resiliently mounted from within said sleeve and insulated
terminal plug formed with an outer conductive sleeve
therefrom by a spacer sleeve and a washer member, said
terminating in a rounded contact rim, said plug having
outer conductive sleeve having a hub portion provided
a conductive coaxial contact mounted from within said 15 with a collar and a threaded section spaced therefrom,
a second nut member adapted to be threaded upon said
sleeve and insulated therefrom, said coaxial contact being
hub for fastening said plug to a second base plate, said
supported at the end of a laterally resilient stem extending
second plate being clamped between said collar and said
outwardly beyond said plug contact rim and adapted for
nut member; an expansible electrically conductive sleeve
being received by said receptacle; an expansible electri
cally conductive sleeve adapted for embracing said 20 adapted for embracing said rounded contact rims, said
expansible sleeve being longitudinally slidable on said
rounded contact rims, said expansible sleeve comprising
contact rims and biased into contraction; and a housing
at least two longitudinal segments and being longitudinally
plate having a cavity therein for receiving and retaining
slidable on said contact rims, spring means for biasing said
said expansible sleeve, said housing plate being secured
segments into contraction upon said contact rims, said
spring means comprising a pair of coil garter springs dis 25 to said second base plate for holding one end of said
expansible sleeve into embracement with said plug con
posed axially of said expansible sleeve at positions inter
tact rim, the opposite end projecting angularly beyond
mediate the respective points of contact between said
the brush of said plug.
sleeve and said contact rims; and stop means ñxed rela
10. A vibration resistant, self-aligning, coaxial con
tive to said terminal plug for limiting the free longitudinal
movement of said expansible sleeve such that said spring 30 hector assembly, comprising: a terminal jack formed With
means will apply a biasing force intermediate said contact
an outer conductive sleeve terminating in a rounded
rims for all longitudinal positions of said sleeve relative
to said terminal jack and plug, said stop means hold
contact rim, said jack having a conductive receptacle
mounted within said sleeve and insulated therefrom by
ing one end of said expansible sleeve into embracement
a spacer sleeve and a washer member, said outer con
with said plug contact rim, the opposite end projecting 35 ductive sleeve having a hub portion provided with a
angularly beyond the coaxial contact of said plug.
collar and a threaded section spaced therefrom, a nut
8. A vibration resistant, self-aligning, coaxial connec
tor assembly, comprising: a terminal jack formed with
member adapted to be threaded upon said hub for fasten
an outer conductive sleeve terminating in a rounded con
between said collar and said nut member; a terminal plug
ing said jack to a base plate, said plate being clamped
tact rim, lsaid jack having a conductive receptacle mount 40 formed with an outer conductive sleeve terminating in a
ed within said sleeve and insulated therefrom by a spacer
rounded contact rim, said plug having a conductive brush
mounted from within said sleeve and insulated therefrom
sleeve and a Washer member, said outer conductive sleeve
having a hub portion provided with a collar and a threaded
by a spacer sleeve and a washer member, said brush
comprising twisted core wires having radially projecting
section spaced therefrom, a nut member adapted to be
threaded upon said hub for fastening said jack to a base 45 wires and adapted for being received by said receptacle;
plate, said plate being clamped between said collar and
and an expansible electrically conductive sleeve adapted
for embracing said rounded contact rims; whereby said
said nut member; a terminal plug formed with an outerconductive sleeve terminating in 'a rounded contact rim,
brush Wires will ñex to assist mating of said terminals,
said outer conductive sleeve having a hub portion pro
Isaid plug having -a conductive coaxial contact mounted
from within said sleeve and insulated therefrom by a 50 vided with a collar and a threaded section spaced there
from, a second nut member adapted to be threaded upon
spacer sleeve and a washer member, said coaxial contact
said hub for fastening said plug to a second base plate,
being supported at the end of a laterally resilient stem ex
tending outwardly beyond said plug contact rim and
`adapted for being received by said receptacle, said outer
said second plate being clamped between said collar and
said nut member; an expansible electrically conductive
conductive sleeve having `a hub portion provided with a 55 sleeve adapted for embracing said rounded contact rims,
said expansible sleeve being longitudinally slidable on said
collar and a threaded section spaced therefrom, a second
nut member adapted to be threaded upon said hub for
fastening said plug to a `second base plate, said second
plate being clamped between said collar and said nut mem
ber; -an expansible electrically conductive sleeve adapted 60
lfor embracing said rounded contact rims, said expansible
sleeve being longitudinally slidable on said contact rims
and biased into contraction; and stop means ñxed rela
tive to said terminal plug for limiting the free longitudinal
movement of said expansible sleeve, said stop means hold 65
ing one end of said expansible sleeve into embracement
with said plug contact rim, the opposite end projecting
angularly beyond the coaxial contact of said plug. _
9. A vibration resistant, self-aligning, coaxial con
nector assembly, comprising: a terminal jack formed with
>contact rims and biased into contraction; and a housing
plate having a cavity therein for receiving and retaining
said expansible sleeve.
References Cited in the file of this patent
UNITED STATES PATENTS
1,556,494
Cooper ______________ __ Oct. 6, 1925
1,984,540
Nelson ____________ __ Dec. 18, 1934
2,086,424
2,243,567
2,548,457
2,757,351
Koehler ______________ __ July 6,
Linde ______________ __ May 27,
Wilson ______________ __ Apr. l0,
Klosterman _________ __ July 31,
1937
1941
1951
1956
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