U.S. patent number 3,852,703 [Application Number 05/321,365] was granted by the patent office on 1974-12-03 for modular jack strip assembly.
This patent grant is currently assigned to Porta Systems. Invention is credited to William V. Carney, Paul V. Deluca.
United States Patent |
3,852,703 |
Carney , et al. |
December 3, 1974 |
MODULAR JACK STRIP ASSEMBLY
Abstract
A jack strip assembly is provided comprising an outer casing and
an inner housing assembly. The inner housing includes a rear wall
and a pair of side walls secured to the rear wall wherein the side
walls are provided with a plurality of vertically spaced and
horizontally aligned slots. Modular jack strips having a plurality
of jacks and a pair of side shoulders are horizontally disposed
within the inner housing assembly by engagement of the shoulders
within the slots. Tuning fork contact assemblies having wire wrap
terminals are positionally secured to the rear wall and adapted to
removably receive contact blades or fingers of the individual jack
appearances within each of the jack strips. The jack strip
assemblies are provided with a longitudinal bore disposed in
coaxial alignment with a keyway or slot provided in the rear wall.
Extending through the longitudinal bore is a bayonet-type fastener
having a slotted head and pairs of spaced flanges at the distal end
portion thereof. When the jack strip is inserted within the housing
assembly, it is removably secured with respect thereto by a
predetermined amount of forward longitudinal movement and a
quarter-turn rotation of the fastener. The rotational movement of
the fastener causes the most distally positioned flanges to
abuttingly engage the rear surface of the rear wall and the
innermost flanges to abuttingly engage the inner surface of the
jack strip assembly, thereby securing said jack strip assembly with
respect to said inner housing assembly.
Inventors: |
Carney; William V. (Valley
Stream, NY), Deluca; Paul V. (Port Washington, NY) |
Assignee: |
Porta Systems (Roslyn,
NY)
|
Family
ID: |
23250302 |
Appl.
No.: |
05/321,365 |
Filed: |
January 5, 1973 |
Current U.S.
Class: |
439/372; 379/329;
439/655; 439/953; 439/188; 439/668 |
Current CPC
Class: |
H01R
13/514 (20130101); H01R 24/58 (20130101); Y10S
439/953 (20130101); H01R 2103/00 (20130101) |
Current International
Class: |
H01R
13/514 (20060101); H01r 009/00 () |
Field of
Search: |
;339/198,211,75R,75M,92,206,207,208,182,183,91R |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
Electro-Tech., AMP Inc., 4-1964..
|
Primary Examiner: Frazier; Roy D.
Assistant Examiner: Hafer; Robert A.
Attorney, Agent or Firm: Amins; Philip D.
Claims
What is claimed is:
1. A modular jack strip assembly comprising
a housing assembly, and
a plurality of modular jack strips,
said housing assembly including
a mounting plate member, and
jack strip mounting means connected to said mounting plate member
said housing assembly being adapted to receive said plurality of
modular jack strips,
each of said jack strips comprising an insulated structure having a
plurality of individual jack terminals each terminal having at
least one electrical contact finger extending outwardly of said
terminals,
a plurality of electrical contact members positionally secured to
said mounting plate member in a predetermined array,
each of said jack strips including mounting members connected
therewith,
said jack strip mounting members being secured with said jack strip
mounting means to positionally secure said jack strips with respect
to said housing assembly, and
corresponding ones of said electrical contact fingers being
disposed in seated engagement with corresponding ones of said
electrical contact members.
2. A modular jack strip assembly in accordance with claim 1,
wherein
said jack strips include releasable locking means connected
therewith,
said mounting plate member includes lock holding means,
said lock holding means engaging said locking means to releasably
lock said jack strips with respect to said mounting plate member
and thus said housing assembly.
3. A modular jack strip assembly in accordance with claim 2,
wherein said releasable locking means comprises
a longitudinal aperture extending through said jack strip,
a bayonet-type fastener disposed within said longitudinal
aperture,
a spring member disposed about a portion of said fastener and
positioned within said aperture for biasing said fastener in a
direction outwardly of said jack strip,
retaining means connected to the distal portion of said fastener to
retain said fastener within said aperture, and
a locking member secured to the distal end of said fastener.
4. A modular jack strip assembly in accordance with claim 3,
wherein
said lock holding means comprises a slot formed in said mounting
plate member.
5. A modular jack strip assembly in accordance with claim 4,
wherein
said fastener and said slot are disposed in substantially coaxial
alignment.
6. A modular jack strip assembly in accordance with claim 3,
wherein
said jack strip includes a keyway which is recessed with respect to
the inner end thereof,
said keyway and said aperture communicating with each other,
whereby said aperture is recessed with respect to the inner end of
said jack strip, and
said retaining means comprising a pair of flanges connected to said
fastener.
7. A modular jack strip assembly in accordance with claim 3,
wherein
said locking member comprises a pair of flanges connected to said
fastener.
8. A modular jack strip assembly in accordance with claim 1,
wherein
said electrical contact members comprise tuning fork contact
assemblies including
an insulating bushing having a slotted opening therein,
a U-shaped contact strip disposed within said bushing,
a wire wrap terminal connected to said U-shaped contact strip and
extending outwardly from said bushing, and
said contact fingers being disposed in mated engagement with said
U-shaped contact strips within said bushing.
9. A modular jack strip assembly comprising
a housing assembly, and
a plurality of modular jack strips,
said housing assembly comprising
a rear wall, and
a pair of side walls,
means for securing said side walls to said rear wall,
each of said side walls having a plurality of spaced slots formed
therein with corresponding ones of said slots in said side walls
being displaced in coplanar relationship,
each of said jack strips comprising an insulated structure having a
plurality of individual jack terminals disposed in laterally offset
relationship,
each of said jack terminals having at least one electrical contact
finger extending outwardly therefrom,
a plurality of electrical contact members mounted on said rear wall
in a predetermined array,
each of said jack strips having shoulders on both sides
thereof,
said plurality of modular jack strips being positionally secured to
said housing assembly by slidable engagement of said shoulders
within said side wall slots, and
corresponding ones of said electrical contact fingers being
disposed in seated engagement with corresponding ones of said
electrical contact members.
10. A modular jack strip assembly in accordance with claim 9,
including
an outer casing, and
means for securing said outer casing with respect to said housing
assembly.
11. A modular jack strip assembly in accordance with claim 9,
wherein
each of said jack strips includes releasable locking means
connected therewith,
said rear wall includes a plurality of lock holding means, and
each of said lock holding means engaging a corresponding one of
said locking means to releasably lock said jack strips with respect
to said rear wall.
12. A modular jack strip assembly in accordance with claim 9,
wherein said releasable locking means comprises
a longitudinal aperture extending through said jack strip,
a bayonet-type fastener disposed within said longitudinal
aperture,
a spring member disposed about a portion of said fastener and
positioned within said aperture for biasing said fastener in a
direction outwardly of said jack strip,
retaining means connected to the distal portion of said fastener to
retain said fastener within said aperture, and
a locking member secured to the distal end of said fastener.
13. A modular jack strip assembly in accordance with claim 12,
wherein
said lock holding means comprises a slot formed in said rear
wall,
said locking means comprises a locking member secured to the distal
end of said fastener, and
said locking member being engageable by the walls surrounding said
slot.
14. A modular jack strip assembly in accordance with claim 13,
wherein
said locking member comprises a pair of flanges connected to said
fastener.
15. A modular jack strip assembly in accordance with claim 14,
wherein
said jack strip includes a keyway which is recessed with respect to
the inner end thereof,
said keyway and said aperture communicating with each other whereby
said aperture is recessed with respect to the inner end of said
jack strip, and
said retaining means comprising a pair of flanges connected to said
fastener.
16. A modular jack strip assembly in accordance with claim 15,
wherein
said electrical contact members comprise tuning fork contact
assemblies including
an insulating bushing having a slotted opening therein,
a U-shaped contact strip disposed within said bushing,
a wire wrap terminal connected to said U-shaped contact strip and
extending outwardly from said bushing, and
said contact fingers being disposed in mated engagement with said
U-shaped contact strips within said bushing.
17. A modular jack strip assembly in accordance with claim 9,
wherein
said electrical contact members comprise tuning fork contact
assemblies including
an insulating bushing having a slotted opening therein,
a U-shaped contact strip disposed within said bushing, 0
wire wrap terminal connected to said U-shaped contact strip and
extending outwardly from aid bushing, and
said contact fingers being disposed in mated engagement with said
U-shaped contact strips within said bushing.
18. A modular jack strip assembly in accordance with claim 16,
including
a guide plate secured to said rear wall,
said guide plate having a plurality of apertures disposed in
coaxial alignment with corresponding ones of said slotted openings
in said insulating bushings, and
said apertures being tapered so as to provide an alignment means
for said contact fingers and insuring proper mating engagement
thereof with said U-shaped contact strips.
19. A modular jack strip assembly in accordance with claim 17,
including
a guide plate secured to said rear wall,
said guide plate having a plurality of apertures disposed in
coaxial alignment with corresponding ones of said slotted openings
in said insulating bushings, and
said apertures being tapered so as to provide an alignment means
for said contact fingers and insuring proper mating engatement
thereof with said U-shaped contact strips.
Description
BACKGROUND OF THE INVENTION
It is commonplace in central telephone installations to employ a
multitude of jack terminals in that they provide easy
connect-disconnect operation. The problems encountered with present
day jack terminals is that they are hard wired whereby it is
exceedingly difficult to isolate problems which occur at the
terminals. The problems which present themselves are open and short
circuit wire connections and open and short circuit conditions at
the jack terminals, per se.
The time required to initially isolate the problems and then
rectify the same is usually quite appreciable and presents
difficulty in maintaining proper and continuous operational
telephone service.
SUMMARY OF THE INVENTION
Accordingly, it is the primary object of the present invention to
provide a new and novel modular jack strip assembly which isolates
the jack terminals from the hard wiring normally associated
therewith.
It is another object of the present invention to provide a modular
jack strip assembly of the foregoing type which encompasses fixed
housing structures which in turn permit of present utilization or
future expansion.
It is still another object of the present invention to provide a
modular jack strip assembly which permits present hard wire
connection and future jack terminal connection or both future hard
wire and jack terminal connection.
It is yet a further object of the present invention to provide an
assembly of the foregoing type wherein the modules utilized are
removably secured with respect to the housing to enable immediate
isolation of a problem at any particular jack terminal or terminals
and facilitation of repair by the simple replacement of a modular
jack strip.
BRIEF DESCRIPTION OF THE DRAWINGS
The foregoing and other objects, features and advantages of the
present invention will become more apparent from the detailed
description hereinafter considered in conjunction with the
accompanying drawings wherein:
FIG. 1 is a partial exploded perspective view depicting a preferred
embodiment of the modular jack strip assembly, constructed in
accordance with the principles of the present invention;
FIG. 2 is a side view of the modular jack strip assembly of FIG.
1;
FIG. 3 is a rear view of the assembly shown in FIG. 1;
FIG. 4 is a view taken on the line 4--4 of FIG. 2;
FIG. 5 is a sectional view taken on the line 5--5 of FIG. 4;
FIG. 6 is a sectional view taken on the line 6--6 of FIg. 4;
FIG. 7 is a sectional view taken on the line 7--7 of FIG. 4;
and
FIG. 8 is a view taken on the line 8--8 of FIG. 4.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings, and more particularly to FIG. 1
thereof, there is shown a modular jack strip assembly generally
denoted by the reference numeral 10 and constructed pursuant to the
principles of the present invention and illustrative of a preferred
embodiment thereof. The assembly 10 comprises an outer casing or
cover member 12 and an inner housing assembly 14. The inner housing
14 includes a pair of side walls 16 and a rear wall or mounting
plate 18. The side walls 16 are secured to the rear mounting plate
18 by means of screws 19, or by any other suitably convenient
means. The front portion of the side walls 16 are provided with a
plurality of spaced vertically disposed and horizontally aligned
slots 20, whose purpose will be described in more detail
hereinafter.
A plurality of tuning fork contact members 22 are mounted in
predetermined disposition on the mounting plate 18. As best seen in
FIGS. 4 through 6, the tuning fork contact members 22 comprise an
insulating bushing 24, a wire wrap post or terminal 26 and an inner
U-shaped contact strip 28, with the terminal 26 and strip 28 being
formed integrally with one another. The bushing 24 has a
substantially rectangular portion 30 and a cylindrical shoulder
portion 32. The members 22 are mounted on the plate 18 by having
the cylindrical portion 32 thereof disposed within openings 34
formed in the mounting plate 18.
The assembly 10 also includes a plurality of modular jack strips,
each of which is generally designated by the reference numeral 36.
The jack strip 36 is of substantially rectangular configuration and
is preferably fabricated of a hard impact plastic material. The
jack strip 36 includes a plurality of individual jack terminals 38
disposed in spaced horizontal relationship, as viewed in FIG. 1.
Each of the jack terminals 38 are internally spaced from one
another by means of upwardly extending shoulders 40 disposed
between adjacent ones of the terminals, as best seen in FIG. 4.
The various types of jack terminals which can be utilized in
conjunction with the modular jack strip 36 of the present invention
are numerous and the configurations depicted in FIGS. 5 and 6 are
merely exemplary of those contemplated. In this regard, the
terminal 38 shown in FIG. 5 is representative of a four terminal
system wherein the inlet end 42 of the terminal 38 is adapted to
receive a plug (not shown) therein, which plug is adapted to
electrically contact the spring fingers 44 and 46 and thereafter
cause the finger 46 to be biased upwardly in turn causing
electrical connection between the contacts 48 and 50 of the fingers
52 and 54, respectively.
The spring members are separated by means of insulators and the
entire apparatus is secured together by means of a bolt 56 and a
nut 58. With particular reference to the spring fingers 44 and 46,
it is seen in FIG. 5 that they terminate in outwardly extending
contact blades or fingers 60 and 62, respectively. It is herein to
be noted that the members 52 and 54 also terminate in outwardly
extending contact fingers which are disposed in laterally offset
relationship with respect to the fingers 60 and 62.
As best seen in FIG. 1, each of the individual jack terminals 38
have a predetermined number of outwardly extending contact blades,
herein generally designated by the numeral 64, with the number of
contact blades 64 connected to the terminals 38 being dependent
upon the type of terminal utilized.
With reference to FIG. 6, there is depicted a simple two contact
jack terminal employing spring fingers 66 and 68 separated by an
insulative member 70 and terminating in contact blades 72 and 74,
respectively.
Each of the modular jack strips 36 is provided with a
longitudinally extending bore 76, as best seen in FIG. 7. The bore
comprises an outwardly disposed portion 78 and a reduced inwardly
extending portion 80 with the junction between the portions 78 and
80 defining an annular shoulder 82. A bayonet-type fastener 84 is
fixedly positioned within the bore 76 and is capable of
longitudinal movement between two fixed positions, as will be
discussed more fully hereinafter. The fastener 84 includes an
enlarged head portion 86 and a reduced shank portion 88. The
enlarged head portion 86 is provided with a slot 90 at the outer
end thereof while the reduced shank portion 88 has a compressible
coil spring 92 disposed therearound at the juncture thereof with
the enlarged head portion 86. The distal end of the fastener 84 is
provided with a pair of spaced apart flanges or pins 94 and 96,
respectively, whose purpose will become more apparent from the
discussion hereinafter.
When it is desired to mount the modular jack strip assembly of the
present invention, a physical location is selected which provides
sufficient space requirements for the assembly 10. Thereafter, the
particular jack strips which are to be utilized are designated;
although not installed at this time. However, the inner housing
assembly 14 is installed and the mounting plate 18 and a
predetermined array of tuning fork contact members 22 are secured.
The internal telephone office wire connections are then made by
wire wrapping the specified wires about the wire wrap terminals 26,
after which this portion of the assembly is deemed to be hard wired
in position. The cover member 12 may then be secured to the inner
housing assembly 14 by means of screws 98. If necessary and
desireable, at this time, the individual jack strips 36 may then be
placed in position in the assembly 10 in the following manner.
A jack strip 36 is slideably positioned between a pair of
horizontally aligned slots 20 by having the side shoulder portions
100 inserted within the proper slots. When this is performed, the
contact blades 64 seat themselves within the bushing 24 of the
tuning fork contact member 22 in electrical contacting engagement
with the U-shape contact strip 28, and thus the terminal post 26.
In order to insure that the contact fingers 64 are properly
positioned for seating within the bushing portions 24 of the
contact members 22, the assembly is provided with an alignment
plate 102 (FIG. 2) having tapered apertures 104 through which the
fingers 64 protrude. The apertures 104 insure the straightening of
any contact fingers which may have been slightly bent or dislodged
from the proper position. The alignment plate 102 is secured to the
rear mounting plate 18 by means of spacer blocks 106 and screws
108.
After the strips have been initially positioned in the manner
hereinbefore described, they are locked in position by means of the
bayonet-type fastener. In particular, a screw driver or other
slotted instrument is placed in the slotted head 90 of the fastener
84 and the fastener is pushed inwardly against the outward biasing
force of the coil spring 92. In this regard, care must be taken to
insure that the flange 94 is disposed in a substantially vertical
position so as to enable the same to extend through the keyway 110
formed in the mounting plate 18. Thereafter, the fastener is
rotated 90.degree. or a quarter turn and released, thereby causing
the flange 94 to engage the rear surface of the mounting plate 18
and also causing the flange 96 to engage the inner end 112 of the
jack strip 36, as best seen in FIG. 7. In this manner, the
individual jack strips are secured in releasable locked position
with respect to the inner housing assembly 14.
It is herein to be noted that the jack strips may be placed in
locked positions within the inner housing assembly 14 immediately
after the posts 26 are hard wired, as previously discussed, or may
be secured at some future subsequent time when the need and
utilization therefor arises. Similarly, once the inner housing
assembly 14 and plate 12 are secured in position, the connection of
the tuning fork contact members 22 and the hard wiring thereof may
be performed immediately or at some subsequent time when the need
therefor is completely ascertained.
In the event that any particular jack terminal should fail and the
circuit must be repaired, the same is accomplished by simply
removing the individual jack strip 36 and replacing it with another
similarly constructed jack strip. Thereafter, the defective jack
strip may be repaired at leisure in an off-line environment.
In removing the jack strip 36 from the locked position all that
need be done is to turn the slotted head 90 of the bayonet-type
fastener 84 a quarter turn so as to enable the flange 94 to pass
through the keyway 110 with the flange 96 becoming seated within a
keyway or slot 122 (FIg. 4) formed in the jack strip 36, thereby
preventing the fastener 84 from becoming disengaged from the jack
strip 36. It is to be noted that the plate 102 is provided with a
slot 120 to enable passage of the distal end of the fastener 84
therethrough.
It is usual to fabricate the assembly 10 so as to accomodate 15
individual jack strips; however, the number of strips 36 used in a
particular assembly 10 is merely a matter of design and space
requirements. Attention is directed to the fact that although in
present discussion, the jack strips have been described as being
disposed in a horizontal plane, the same is merely for purposes of
illustration and not intended to be interpreted as a limitation of
the present invention, since it is readily possible to position the
entire assembly 10 in a substantially horizontal plane, as opposed
to the vertical plane illustrated in the present drawings.
It is to be noted that terminal designation strips (not shown) are
placed between adjacently disposed jack strips 36 in the spaces
therebetween. However, in the case of the uppermost jack strip,
there is provided an arcuate strip 124 secured by means of screws
126. The designation strip may then be inserted between the upper
portion of terminal inlet end 42 and the strip 124.
It is apparent that the present invention provides a simple and
effective solution for the quick and easy isolation of open or
short circuit conditions on an individual jack terminal and the
immediate repair and correction of the same, so as to insure
continuous telephone operating service, in a central telephone
office. It will also be apparent that the utilization of the
present invention is not solely limited to telephone
applications.
While we have shown and described the preferred embodiment of my
invention, it will be apparent to those skilled in the art that
there are many modifications, changes and improvements which may be
made therein without departing from the spirit and scope
thereof.
* * * * *