U.S. patent number 3,649,956 [Application Number 04/854,496] was granted by the patent office on 1972-03-14 for replaceable electrical connector.
This patent grant is currently assigned to Bell & Howell Company. Invention is credited to Eliahu Vrobel.
United States Patent |
3,649,956 |
Vrobel |
March 14, 1972 |
REPLACEABLE ELECTRICAL CONNECTOR
Abstract
A cable connector permitting ease of replacement thereof with
respect to its connections to a cable. One or more longitudinal
conductors are permanently secured within the connector shell
assembly, each conductor having a forward end including
conventional contact means for releasably engaging a corresponding
contact supplied by a mating connector component. The rearward end
of each of the longitudinal conductors includes respective rearward
contacts, to which secondary contacts (preferably crimped to the
cable wires) are conductively and releasably securable.
Inventors: |
Vrobel; Eliahu (Los Angeles,
CA) |
Assignee: |
Bell & Howell Company
(Chicago, IL)
|
Family
ID: |
25318839 |
Appl.
No.: |
04/854,496 |
Filed: |
September 2, 1969 |
Current U.S.
Class: |
439/607.41;
439/598; 439/935 |
Current CPC
Class: |
H01R
24/20 (20130101); H01R 31/06 (20130101); H01R
13/502 (20130101); H01R 13/622 (20130101); H01R
2107/00 (20130101); Y10S 439/935 (20130101); H01R
24/28 (20130101) |
Current International
Class: |
H01R
13/622 (20060101); H01R 31/06 (20060101); H01R
13/62 (20060101); H01R 13/502 (20060101); H01r
013/58 (); H01r 013/40 () |
Field of
Search: |
;339/31,111,103,89,94,136,218,143 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Moore; Richard E.
Claims
What is claimed is:
1. In a connector for releasably coupling a plurality of conductive
wires included by a cable to a corresponding plurality of supplied
contacts, the combination comprising:
a shell assembly having a longitudinal axis and including a
transverse wall portion therein;
a plurality of longitudinal conductors each having a forward end
portion including forward contact means for releasably engaging a
respective one of the supplied contacts, a rearward end portion
including rearward contact means, and an intermediate portion
between said forward and rearward end portions;
securing means in said wall portion insulatably securing each of
said longitudinal conductors axially through said wall portion
along respective ones of said intermediate portions;
insulating means carried by said shell assembly and having
longitudinal apertures therein communicating with respective ones
of said longitudinal conductors, said end portions respectively
positioned within said apertures; and
a plurality of secondary conductors respectively secured to the
wires and including secondary contact means releasably engaging
said rearward contact means, said secondary conductors respectively
fitted within said apertures for permitting said secondary
conductors to be axially withdrawn from said apertures and removed
from the connector.
2. The connector according to claim 1, above, wherein said rearward
contact means comprises a pin contact, and said secondary contact
means comprises a socket contact.
3. The connector according to claim 1, above, wherein each of said
secondary conductors includes a crimpable contact for securing said
secondary conductors to the wires.
4. The connector according to claim 1, above, wherein
said transverse wall portion includes a plurality of axial bores
therein,
said intermediate portions of said longitudinal conductors are
axially positioned within respective ones of said bores, and
said securing means comprises an insulating material within said
bores bonding said intermediate portions to said wall portion.
5. The connector according to claim 4, above, further including
means removably coupled to said shell assembly and securable to the
cable, for preventing axial separation of said secondary contact
means from said rearward contact means.
6. In a connector for releasably coupling a plurality of conductive
wires included by a cable to a corresponding plurality of supplied
contacts, the combination comprising:
a shell assembly having a longitudinal axis and including a
transverse wall portion having a plurality of axial bores
therein;
a plurality of longitudinal conductors each having a forward end
portion including forward contact means for releasably engaging a
respective one of the supplied contacts, a rearward end portion
including rearward contact means, and an intermediate portion
between said forward and rearward end portions axially positioned
within a respective one of said bores;
a glass material within said bores insulatably bonding said
intermediate portions to said wall portion;
a plurality of secondary conductors secured to respective ones of
the wires and including secondary contact means axially engaging
said rearward contact means; and
an insulating member carried by said shell assembly and insulating
said rearward end portions from one another and from said shell
assembly, said insulating means adapted for axially receiving said
secondary conductors.
7. The connector according to claim 6, above, further including
means removably coupled to said shell assembly and securable to the
cable, for preventing axial separation of said secondary contact
means from said rearward contact means.
8. In a connector for releasably coupling a plurality of conductive
wires included by a cable to a corresponding plurality of supplied
contacts, the combination comprising:
a shell assembly having a longitudinal axis and including a
transverse wall portion therein, said transverse wall portion
having a plurality of axial bores;
a plurality of longitudinal conductors each having a forward end
portion including forward contact means for releasably engaging a
respective one of the supplied contacts, a rearward end portion
including rearward contact means, and an intermediate portion
between said forward and rearward end portions said intermediate
portions of said longitudinal conductors being axially positioned
within respective ones of said bores;
securing means in said wall portion insulatably securing each of
said longitudinal conductors axially through said wall portion
along respective ones of said intermediate portions, said securing
means comprising a glass within said bores bonding said
intermediate portions to said wall portions;
a plurality of secondary conductors removable from the connector,
said secondary conductors secured to respective ones of the wires
and including secondary contact means axially engaging said
rearward contact means; and
ceramic insulating means carried by said shell assembly and
insulating said rearward end portions from one another and from
said shell assembly, said ceramic insulating means adapted for
axially receiving said secondary conductors.
9. The connector according to claim 8, above, further including
means removably coupled to said shell assembly and securable to the
cable, for preventing axial separation of said secondary contact
means from said rearward contact means.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention.
This invention relates to electrical connectors, and more
particularly to a cable connector permitting ease of replacement
with respect to its connections to a cable.
2. Description of the Prior Art.
Cable connectors ordinarily comprise mating plug and receptacle
assemblies, for releasably coupling a plurality of conductors in
predetermined arrangement. The plug and receptacle assemblies can
each be attached to respective cables (in which case one of the
assemblies is generally mounted to a panel), or one of the
assemblies can be attached to the cable while the other is an
integral part of an electrical instrument, such as a transducer
apparatus.
In most cable connectors known to the prior art, the individual
conductive wires of a cable are rigidly attached to individual
contacts permanently carried by one of the connector components
(i.e., the plug or the receptacle assembly). When this type of
connector component experiences a mechanical failure, it cannot be
easily replaced, causing the instrument to which it is coupled to
be inoperative for extended periods of time. In applications where
it is desirable that particular conditions be continuously
monitored, it is important that periods of instrument inactivity
caused by connector failure be decreased to a minimum.
In prior attempts to overcome "downtime" caused by connector
failure, various cable connectors have been developed which can be
replaced at the site of application. Generally, such connector
components include removable mating conductors (i.e., conventional
sockets or pins). A typical replacement procedure involves removing
the damaged connector component from the cable, disassembling a
replacement component (requiring the removal of the conductors and
the associated insulator parts therefrom), soldering or otherwise
attaching the cable wires to the new conductors, and reassembling
the various parts. This procedure is both difficult and
time-consuming requiring an adept manipulation of many small
parts.
Moreover, for high-temperature applications (e.g., up to
800.degree. F.), ceramic insulation is generally provided for
insulating the conductors from each other and from the conductive
shell of the connector component. In high-temperature connector
components containing removable conductors, the conductors cannot
be rigidly secured with respect to the ceramic insulator. When a
connector component of this type is operatively coupled to a mating
connector component attached to a transducer which originates
high-frequency signals (such as a vibration sensor, a velocity
sensor or an accelerometer), high-frequency movement often occurs
between the conductors and the ceramic insulator, increasing the
connector's susceptibility to failure. In addition, particularly in
accelerometer applications, such high-frequency movement produces
an audible chatter which is impressed upon the transducer output
signal.
SUMMARY OF THE INVENTION
The present invention provides a cable connector component which is
easily replaceable at the site of application. In its preferred
embodiment, the connector component can be utilized in
high-temperature and high-frequency vibration applications without
producing relative movement between the conductors and the
refractory insulation securing the conductors to the shell of the
connector component.
The connector component includes a conductive shell assembly having
a longitudinal axis and including a transverse wall portion
therein. One or more longitudinal conductors are permanently
secured within the shell assembly, each conductor having a forward
end including conventional contact means for releasably engaging a
corresponding contact supplied by a mating connector component.
Each of the longitudinal conductors further includes a rearward end
having a rearward contact means, and the conductors are rigidly
secured within the shell by an insulative bond between an
intermediate portion of the conductors and axial bores in the wall
portion.
The rearward contacts of the longitudinal conductors are insulated
from each other by means of an apertured ceramic insert. Secondary
conductor means are provided for attachment to each of the cable
wires, preferably by crimping the secondary conductors to the
conductive wires. The secondary conductors include secondary
contacts for releasably engaging the rearward contacts of the
connector conductors; for example, the secondary contacts can be of
the socket type while the rearward connector contacts can be of a
mating-pin type. Conventional clamping means is removably coupled
to the shell assembly for preventing axial separation of the
secondary contacts from the rearward contacts.
The replacement of the connector component is easily and rapidly
performed. Upon removing a damaged component from the cable, new
secondary conductors can be crimpt onto the cable wires and
installed on the connector's rearward contacts. The cable is then
secured by coupling the clamping means to the connector shell
assembly.
BRIEF DESCRIPTION OF THE DRAWING
The novel features which are believed to be characteristic of the
invention will be better understood from the following description
considered in connection with the accompanying drawing in which a
preferred embodiment of the present invention is illustrated by way
of example. It is expressly understood, however, that the drawing
is for the purpose of illustration and description only and is not
intended as a definition of the limits of the invention.
The drawing is a cross section view of a preferred embodiment of an
electrical cable connector component in accordance with the present
invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Turning to the drawing, the preferred connector component 10 finds
particular application for releasably coupling a pair of conductive
wires 12 of a shielded cable 14 to conductive contacts (not shown)
supplied by a connector component integral with a two-terminal
instrument; e.g., a vibration-type transducer. It should be noted,
however, that the preferred embodiment 10 can be adapted for
connecting a single conductive wire to a supplied contact, as well
as for connecting any plurality of wires to a corresponding
plurality of supplied contacts.
The connector component 10 includes an electrically conductive
shield assembly 16 having a longitudinal axis a-a and comprising a
generally tubular shell member 18 having a rear annular shoulder 20
and a forward member 22 having a transverse wall portion 24 within
the shell assembly 16. The shell member 18 and the forward member
22 are rigidly and conductively attached to one another, for
example by means of welds 26.
The wall portion 24 of the forward member 22 is provided with
axially directed bores 28 therethrough, the number of such bores
depending upon the number of conductive wires included by the cable
14.
A pair of rigid longitudinal conductors 30 extend through the wall
portion 24. The conductors 30 include separate contact means on
each end thereof; for example, the forward end of the conductor 30
can include a conventional socket-type contact 32, while the
rearward end of the conductor 30 can include a conventional
pin-type contact 34. Accordingly, the connector component 10 shown
in the drawing is a receptacle assembly, the socket contacts 32
adapted for mating with pin-type contacts supplied by a plug
assembly (not shown).
Means are provided for rigidly and insulatably securing the
longitudinal conductors 30 to the wall portion 24, axially through
the bores 28, along portions of the conductors 30 between their
respective socket contacts 32 and their respective pin contacts 34.
For example, glass-bonding means 38 can be provided within the
bores 28 and surrounding the intermediate portions 36 of the
conductors 30, effecting a glass-to-metal seal between the wall
portion 24 of the forward member 22 and the conductor intermediate
portions 36. In such manner, the conductors 30 are permanently
secured to the shell assembly 16 in a predetermined configuration,
electrically insulated with respect to one another and with respect
to the shell assembly 16, and including socket contacts 32 and pin
contacts 34 axially extending from opposite faces of the wall
portion 24.
The rearward pin contacts 34 are electrically insulated with
respect to each other by means of a ceramic insert 40 retained by
the shell assembly 16 by means of a shoulder 42 in cooperative
engagement with the shell member shoulder 20, the forward face of
the insert 40 in contact engagement with the rearward surface of
the wall portion 24.
The ceramic insert 40 includes axially directed holes 44 therein
for receiving the pin contacts 34. The holes 44 extend through the
ceramic insert 40, and each hole 44 includes portions thereof which
are variable in diameter (such as a forward portion 44a for
accommodating the conductors 30) an intermediate hole portion 44b
for accommodating a secondary socket contact 46 of a secondary
conductor 48, and a rearward hole portion 44c for accommodating a
crimp-type contact 50 of the secondary conductor 48. In such
manner, the rearward pin contacts 34 are insulated from each other
and from the shell assembly 16, while the secondary conductors 48
are similarly insulated from each other and from the shell assembly
16.
Although other insulation materials (such as epoxy or neoprene) can
be substituted for ceramic in order to provide the insert 40, as
well as for the glass 38, the use of these refractory materials
permits the receptacle 10 to be employed in relatively
high-temperature environments or where the coupled transducer
generates a large amount of heat.
The secondary conductors 48 are secured to the cable wires 12 by
means of the crimp-type contacts 50. Alternatively, the secondary
conductors 48 can be soldered to the wires 12 if desired, provided
operating temperatures are not produced which are sufficiently high
to melt the solder. The secondary socket contact 46 comprising the
forward portion of the secondary conductor 48 is releasably coupled
to the pin contacts 34, for providing conductive communication
between the wires 12 and the pin contacts 34.
The shielded cable 14 is removably secured to the shell assembly 16
by means of conventional static strain relief apparatus, such as a
cable clamp 52 in clamping engagement with the conductive outer
shield of the cable 14 and retained by a clamp nut 54 threadably
engaging the shell member 18. The metal clamp 52 and clamp nut 54
provide conductive communication between the conductive outer
shield of the cable 14 and the receptacle shell assembly 16, while
preventing axial separation of the secondary socket contacts 46
from the rearward pin contacts 34.
In conventional manner, the shell assembly 16 includes a sleeve
portion 56 (integral with the forward member 22), provided with a
key 58, for cooperative engagement with associated parts included
by the supplied plug assembly. The e receptacle 10 can be
conductively and releasably coupled to the shell assembly of the
plug by conventional means, such as an internally threaded coupling
nut 60 threadably engaging external threads provided by the
plug.
In the event of failure of a connector receptacle having contacts
rigidly secured to the cable wires 12 (as in prior art connector
configurations) or failure of the connector receptacle 10 of the
present invention, a replacement receptacle 10 can be substituted
therefor in a simple manner. After being decoupled from the
supplied plug assembly, the damaged receptacle can be removed by
cutting the cable 14, and the clamp nut 54 and clamp 52 can be
slipped onto the cable 14. The ends of the conductive wires 12 are
then bared by stripping a portion of the insulation therefrom, and
the crimp-type contacts 50 of the secondary conductors 48 are
crimped onto the ends of the wires 12. The secondary socket
contacts 46 of the secondary conductors 48 are thereupon inserted
into the appropriate holes 44 of the ceramic insert 40 and onto the
rearward pin contacts 34. The clamp nut 54 is threadably secured to
the shell member 18, causing the cable 14 to be retained by the
cable clamp 52.
Alternatively, a damaged receptacle 10 can be replaced by merely
uncoupling the clamp nut 54, axially separating the secondary
socket contacts 46 from the rearward pin contacts 34, connecting
the secondary socket contacts 46 to the pin contacts 34 of the
replacement receptacle 10 and coupling the clamp nut 54
thereto.
Thus, there has been described a preferred embodiment of a cable
connector component permitting ease of replacement with respect to
its connections to an electrical cable, the preferred embodiment
being a high-temperature connector receptacle for combination with
a connector plug integral with a transducer. Other embodiments of
the present invention, and modifications of the preferred
embodiment herein presented, may be developed without departing
from the essential characteristics thereof.
For example, the connector component 10 can be of the plug type,
for mating connection to a supplied connector receptacle.
Similarly, the rearward contact means provided by the connector
component can be of the socket type (instead of the pin contacts
34), whereupon the secondary conductors 48 will include secondary
pin contacts (instead of the secondary socket contacts 46). In
addition, both mating components of a connector can be constructed
in accordance with the present invention, for releasably coupling
the conductive wires of the cables; i.e., one of the connector
components need not be an integral part of a supplied transducer or
other instrument.
Accordingly, the invention should be limited only by the scope of
the claims listed below.
* * * * *