U.S. patent number 3,790,922 [Application Number 05/251,158] was granted by the patent office on 1974-02-05 for coupling for an electrical connector.
This patent grant is currently assigned to The Bendix Corporation. Invention is credited to Richard W. Normann.
United States Patent |
3,790,922 |
Normann |
February 5, 1974 |
COUPLING FOR AN ELECTRICAL CONNECTOR
Abstract
An easily disconnectable sleeve that houses one half of a quick
release or emergency release type connector assembly. The rear
portion of the sleeve may be removed for access to the junction
between the electrical contacts of the connector and the incoming
wires, thereby permitting the electrical circuitry to be checked
without disconnecting the connector assembly. The rear portion of
the sleeve is fixedly secured to the front portion of the sleeve by
two snap rings and a coupling ring. Unlike a threaded coupling,
this coupling is capable of transmitting torque and resisting
vibrations that would normally uncouple a threaded coupling.
Inventors: |
Normann; Richard W. (Otego,
NY) |
Assignee: |
The Bendix Corporation
(Southfield, MI)
|
Family
ID: |
22950732 |
Appl.
No.: |
05/251,158 |
Filed: |
May 8, 1972 |
Current U.S.
Class: |
439/544; 285/321;
439/905; 285/70; 439/563 |
Current CPC
Class: |
H01R
13/74 (20130101); Y10S 439/905 (20130101) |
Current International
Class: |
H01R
13/74 (20060101); H01r 013/46 () |
Field of
Search: |
;285/65,70,321,325
;339/125,126R,129,132,136-139,141,143 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1,035,989 |
|
Aug 1958 |
|
DT |
|
615,082 |
|
Dec 1948 |
|
GB |
|
Primary Examiner: McGlynn; Joseph H.
Assistant Examiner: Staab; Lawrence J.
Attorney, Agent or Firm: Eifler; Raymond J.
Claims
1. An electrical connector comprising:
a first sleeve having a cutaway rear end portion that includes on
the remaining rear end portion a rearwardly facing shoulder and an
annular groove between said rearwardly facing shoulder and said
rear end;
a plurality of electrical contacts each having a mating end and a
terminal end;
means for mounting said contacts within said sleeve so that said
terminal ends of said contacts are facing said rear end of said
sleeve;
a second sleeve that includes a cutaway front end portion in mated
relationship with said cutaway rear portion of said first sleeve,
said remaining front end portion of said second sleeve including a
rearwardly facing shoulder and an annular groove aligned with the
shoulder and groove of said first sleeve;
a coupling ring mounted on the front end portion of said second
sleeve in abutment with said rearwardly facing shoulders of said
first and second sleeves; and
means for retaining said coupling ring between said rearwardly
facing shoulders and said annular grooves in said first and second
sleeves, said retaining means disposed in said grooves of said
first and second sleeves
2. An electrical connector as recited in claim 1 wherein said means
for retaining said coupling ring is a snap ring so that said first
and second
3. The combination as recited in claim 2 wherein said coupling
ring
4. An electrical connector comprising:
a first sleeve having a cutaway rear end portion that includes on
the remaining rear end portion a first and second annular groove
arranged in spaced relationship, said second groove closer to the
rear end of said sleeve than said first groove;
a plurality of electrical contacts each having a mating end and a
terminal end;
means for mounting said electrical contacts within said sleeve so
that said terminal ends of said contacts are facing said rear end
of said sleeve;
a second sleeve that includes a cutaway front end portion in mated
relationship with said remaining rear portion of said first sleeve,
said remaining front end portion of said second sleeve including a
first and second annular groove aligned with the first and second
grooves of said first sleeve, said first annular groove of said
second sleeve closer to the front end of said second sleeve than
said second groove;
a first snap ring disposed in said first annular groove of said
first sleeve and said first annular groove of said second
sleeve;
a coupling ring encircling said rear end portion of said first
sleeve and said front end portion of said second sleeve and
abutting against one side of said first mounting ring; and
a second snap ring disposed in said second annular groove of said
first sleeve and said second annular groove of said second sleeve
and abutting against the other side of said coupling ring whereby
said first and second
5. The combination recited in claim 4 wherein said coupling ring
includes
6. An electrical connector as recited in claim 4 wherein said means
for mounting said electrical contacts within said sleeve includes a
first assembly adapted to be releasably connected to a second
assembly having a second plurality of contacts adapted to mate with
said first plurality of contacts, said first assembly releasing
said second assembly when predetermined axial forces are applied to
said first and second assemblies.
Description
BACKGROUND OF THE INVENTION
This invention relates to an electrical connector of the quick
disconnect or emergency release type. The invention is more
particularly related to a housing for the plug portion of a
connector assembly which provides access to the terminals of the
connector contacts and the incoming wires without disassembly of
the connector assembly.
In certain industrial and military applications it is necessary to
have a connector assembly wherein the plug and receptacle are
rapidly disengaged upon the application of opposed axial forces,
such as when the plug and receptacle are pulled apart. A specific
example of this type of connector may be found in U.S. Pat. No.
3,538,485 entitled "Coupling Device", issued Nov. 3, 1970 to W. F.
Hennessey, Jr. In the electrical connector described in U.S. Pat.
No. 3,538,485 a lanyard, attached to the connector assembly, must
be pulled to activate the release mechanism that allows the
connector assembly to separate. However, some applications require
the connector plug to be housed in a long metal sleeve which does
not permit access to the connection between the incoming wires and
the terminal portion of the electrical contacts within the
connector assembly. Therefore, if replacement of a contact is
necessary or if it is necessary to check the operational integrity
of the electrical system, it is also necessary to disassemble
and/or disconnect the entire sleeve from the connector
assembly.
SUMMARY OF THE INVENTION
This invention provides an emergency release electrical connector
assembly with the capability of providing access to the connection
between incoming wires and terminal ends of the electrical contacts
of a connector assembly once the connector and wires are assembled.
The invention further provides a coupling device for containing a
connector that is simple to connect and disconnect, has an
extremely high resistance to vibration with respect to uncoupling,
and is capable of transmitting torque in both directions, which a
threaded coupling without modification is not capable of doing.
The invention is an emergency release electrical connector assembly
(1) characterized by a housing for the assembly which includes two
sleeves (100, 200) demountably connected to each other by a lock
ring (400) and snap rings (301, 302), thereby providing access to
the terminals between the incoming wires (25) and electrical
contacts (11) of the connector assembly.
In one embodiment of the invention (FIGS. 1 and 2) the electrical
connector comprises: a first sleeve (100) having a cutaway rear end
portion that includes on the remaining rear end portion a first and
second annular groove (101, 102) arranged in spaced relationship,
the second annular groove closer the rear end of the first sleeve
than the first annular groove; a plurality of electrical contacts
(11) each having a mating end and a terminal end; means for
mounting the electrical contacts within the sleeve (disclosed in
the U.S. Pat. No. 3,538,485) so that the terminal ends of the
contacts are facing the rear end of the first sleeve; a second
sleeve (200) that includes a cutaway front end portion in mated
relationship with the remaining rear portion of the first sleeve,
the remaining front rear end portion of the second sleeve including
third and fourth annular grooves (203, 204) aligned with the first
and second grooves of the first sleeve, the third annular groove
closer to the front end of the second sleeve than the fourth
annular groove; a snap ring (301) disposed in the first annular
groove of the first sleeve and the third annular groove of the
second sleeve; a coupling ring (400) encircling the rear end
portion of the first sleeve and the front end portion of the second
sleeve and abutting against one side of the first mounting ring;
and a second snap ring (302) disposed in the second annular groove
of the first sleeve and the fourth annular groove of the second
sleeve and abutting against the other side of the coupling ring
whereby the first and second sleeves are demountably connected
together. In an alternate embodiment (FIG. 5) the first annular
groove of the first sleeve and the third annular groove of the
second sleeve are replaced by a shoulder (105, 205).
Accordingly, it is an object of this invention to provide a
coupling for one half of a connector assembly that is capable of
transmitting torque, has the ability to resist vibrations that
would normally uncouple threaded type couplings, and is readily
disconnectable to provide access to the junction between the
incoming wires and the electrical contacts of the electrical
connector.
Another object of this invention is to provide a novel coupling
device to be used in combination with an electrical connector
assembly of the type which permits rapid disengagement of the
connector assembly on the application of opposing axial forces
occurring in the process of pulling the connector assembly
apart.
Still another object of this invention is to improve the
versatility of the connector assembly shown in U.S. Pat. No.
3,538,485 and similar connector assemblies.
The above and other objects and features of the invention will
become apparent from the following detailed description taken in
conjunction with the accompanying drawings and claims which form a
part of this specification.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates the assembled coupling device in combination
with an emergency release type connector assembly.
FIG. 2 illustrates the coupling assembly before it is securely
connected together.
FIG. 3 illustrates a coupling ring.
FIG. 4 illustrates a snap ring which is used to secure the sleeves
together.
FIG. 5 illustrates an alternate embodiment of the coupling assembly
which embodies the principles of this invention.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring now to the drawings, FIG. 1 illustrates a releasable
electrical connector assembly in combination with a disconnectable
housing assembly that embodies the principles of this invention. A
more detailed description and drawings of a releasable electrical
connector assembly used in combination with this invention may be
found in the aforementioned U.S. Pat. No. 3,538,485.
The coupling device, which is used in combination with an emergency
release type electrical connector 1, includes a first sleeve 100, a
second sleeve 200, coupling ring 400 and snap rings 301, 302 which
connect the first sleeve 100 and the second sleeve 200 together and
which captively retain the coupling ring 400 around the first
sleeve 100 and the second sleeve 200.
The first sleeve 100 is mechanically linked to a connector assembly
which is shown, by way of example, in the form of a plug and socket
type electrical connector assembly comprising two matable parts of
assemblies 2 and 3. The connector assembly is adapted to be
releasably coupled in mated relationship for quick and easy
disengagement. One half of the connector assembly 2 is shown as
comprising a tubular shell 4, an insulating contact supporting
insert 5 mounted in the shell, and a plurality of socket contacts 6
supported by the insert. Shell 4 has three equally spaced coupling
pins or lugs 7 projecting radially therefrom, only one of the pins
being shown. The other half of the connector assembly 3 shown mated
with assembly 2 comprises a tubular shell 8 which telescopes with
shell 4 and has a plurality of axially extending keys 9 on the
periphery thereof. These keys mate with keyways in shell 4 to
angularly orient the assemblies and prevent relative rotation
thereof. An insulating insert 13 supports a plurality of pin
contacts 11 in shell 8 for mating with socket contacts 6 in shell
4. Means are also provided for mechanically and releasably coupling
each half of the connector assembly 2 and 3 together in mated
relation in a manner which permits quick, simultaneous release of
the coupling means and disengagement of the connector assembly. The
coupling means is associated with shell 8 and forms an assembly
therewith. In the embodiment shown the coupling comprises an inner
sleeve 12, the forward end of which surrounds a rear portion of
shell 8 and has an internal groove 14 in which is mounted an
annular wavy compression spring 15. Alternate lobes of the spring
engage the rear wall 16 of the groove and the other lobes thereof
engage concentric telescoping flanges 17, 18 on shell 8 and sleeve
12 respectively. Sleeve 12 is free to rotate about shell 8, and
axial movement of sleeve 12 to the right or rearwardly relative to
shell 8 is limited by a split washer 19 seated in an annular groove
on the shell 8 and engageable with an external shoulder on the
sleeve. Shell 8 is permitted limited axial movement to the right or
rearwardly relative to sleeve 12 against the compression of spring
15. The outer sleeve 100 of the novel coupling assembly surrounds
inner sleeve 12 and is connected thereto for rotation therewith and
limited axial movement relative thereto by any suitable means, such
as an inwardly projecting tab or key on sleeve 100 and a mating
groove or keyway in the periphery of inner sleeve 12. Further
details and drawings describing the operation of the releasable
electrical connector portion of this assembly may be obtained from
a reading of the aforementioned U.S. Pat. No. 3,538,485, the
description of this type of electrical connector being offered for
purposes of illustrating the advantages and functions of the
present invention.
The second sleeve 200 may or may not be directly connected to a
cable (not shown) having a plurality of wires 25 therein that pass
through the second sleeve 200 and are connected to the terminal end
of the electrical contacts 11.
The coupling ring 400 may be mounted to a rack or panel (not shown)
by suitable mounting means (not shown). The purpose of the rack or
panel 500 is to stop the movement of the sleeves 100 and 200 in the
direction of the arrow A when the assembly is being pulled in that
direction so that the release mechanism of the connector assembly
will allow the mated contacts 6, 11 to disengage.
FIG. 2 shows a partial diagrammatic view of the coupling sleeves
100, 200, each of which is cut away to remove 180 degrees of one
end. The first sleeve 100 includes a cutaway rear end portion that
includes on the remaining rear end portion a first annular groove
101 and a second annular groove 102 arranged in spaced
relationship, the second annular groove 102 being closer to the
rear end of the sleeve 100 than the first groove 101.
The second sleeve 200 also includes a similar cutaway front end
portion that includes on the remaining front end portion of the
second sleeve 200 a third annular groove 203 and a fourth annular
groove 204 arranged in the same spaced relationship as the annular
grooves on the first sleeve 100, the third annular groove 203 being
closer to the front end of the second 200 than the fourth annular
groove 204.
In the embodiment shown, each of the sleeves has 180 degrees
removed from one end so that when the first sleeve 100 is mated
with the second sleeve 200, the grooves 101 and 203 align
themselves to form a continuous groove 360 degrees around the mated
sleeves. Similarly, groove 102 of the first sleeve 100 and groove
204 of the second sleeve 200 align themselves to form a continuous
groove 360 degrees around the mated sleeves. In this figure sleeves
100 and 200 will not remain in mated relationship unless a
retention mechanism, such as a snap ring shown in FIG. 4, is placed
in one of the continuous grooves (i.e., 101 and 203).
FIG. 3 is a view of the coupling 400 shown in FIG. 1. The coupling
includes an opening therein slightly larger than the configuration
of the first sleeve 100 and second sleeve 200 when they are in
mated relationship. The remaining portion of the coupling may take
any configuration and may include means for mounting the coupling
ring onto a rack or panel. Preferably, however, the coupling 400 is
ring shaped.
The coupling ring 400 may include mounting means such as screws or
bolts to fasten the coupling ring to a rack or panel so that when a
continuous axial force is applied in the direction A (FIG. 1), the
mechanism retaining the connector assembly will allow the contacts
of the connector assembly to disengage. Disengagement of the
connector assembly occurs when tension is applied in direction A to
the wires or cables (not shown) attached to contacts 6 and when the
first sleeve 100 remains in a fixed position, such as when the
coupling ring 400 is mounted on a rack or strikes an object
preventing further movement of the sleeves in direction A, thereby
allowing the electrical contacts 6, 11 which are in mated
relationship to be separated from each other by the force that is
pulling on the cable (not shown) in the direction indicated by
arrow A.
FIG. 4 is a diagrammatic view of a snap ring shown in FIG. 1 (301,
302). Preferably the snap rings are made of a metal and are shaped
to be resiliently deformable in the radial direction. The rings are
also preferably split, with each end portion having a hole therein
for receiving a tool to facilitate the opening of the ring and
disconnecting of the sleeves. Alternately, a split ring could have
tabs on each end that may be grasped by hand or a tool to enable a
force to be applied that will increase the inner diameter of the
ring so that it may be removed from or located in the grooves in
the sleeves 100, 102.
FIG. 5 shows an alternate embodiment of the invention wherein one
of the continuous grooves formed by grooves 101 and 203 is replaced
by a continuous rearwardly facing shoulder formed by shoulders 105
and 205. In this embodiment the sleeve 100 and the sleeve 200 are
secured together when in mated relationship by snap ring 302. The
coupling 400 is retained in position by the rearwardly facing
shoulders 105, 205 and the snap ring 301 located in the continuous
annular groove formed by grooves 102 and 204.
OPERATION
Referring now to the drawings, and more particularly to FIG. 1,
access may be gained to the connections between the wires 25 and
the rear end of the electrical contacts 11 as follows: snap ring
302 is expanded by a tool or some other means so that it is removed
from the annular groove (102, 204) and placed in a position where
it encircles either the cable (not shown) or the narrow portion of
the rear sleeve 200. Next, the coupling nut 400 is moved back to a
position alongside the snap ring 302 on the narrow poriton of the
rear sleeve 200. Again, a tool or some other means is used to
expand the snap ring 301, remove it from its annular groove and
move it to a position alongside the coupling ring 400 on the narrow
portion of the rear sleeve 200. Once the snap rings 301, 302 and
the coupling ring 400 are moved to this position, the second sleeve
200 may be moved in the direction B, away from the first sleeve
100, thereby exposing the terminals of the wires 25 and the
electrical contacts 11.
While a preferred embodiment of the invention had been disclosed,
it will be apparent to those skilled in the art that changes may be
made to the invention as set forth in the appended claims and, in
some instances, certain features of the invention may be used to
advantage without corresponding use of other features. For example,
in certain applications the object of this invention may be
attained by utilizing only one snap ring and one continuous annular
groove formed by a portion of that groove in the sleeves 100, 200.
Further, the cutaway portion of the sleeves may take any
configuration so long as the sleeves 100, 200 are matable and so
long as each piece contributes a groove that forms a continuous
groove around both sleeves. Accordingly, it is intended that the
illustrative and descriptive materials herein be used to illustrate
the principles of the invention and not to limit the scope
thereof.
* * * * *