U.S. patent number 3,781,758 [Application Number 05/175,281] was granted by the patent office on 1973-12-25 for gang connector and patching cable assembly and method of using same.
This patent grant is currently assigned to George W. Gillemot, John T. Thompson. Invention is credited to Karl R. Anderson.
United States Patent |
3,781,758 |
Anderson |
December 25, 1973 |
GANG CONNECTOR AND PATCHING CABLE ASSEMBLY AND METHOD OF USING
SAME
Abstract
A gang connector and patching cable assembly and method for
maintaining uninterrupted communication service between components
of a central telephone office facility while certain permanent
components therein are being serviced or replaced. The patching
cable serves to bridge components and conductors undergoing repair,
consolidation or replacement and includes flexible patching cabling
equipped with detachably coupled gang connectors having provision
for simultaneously connecting each end of a multiplicity of the
patching cable conductors to individual terminals of remotely
located terminal boards thereby providing temporary bypass
connections in parallel with conductors of the permanent central
station equipment while the latter are undergoing servicing. The
gang connectors have various unique features including
independently movable contactors provided with sets of sharp
pointed pins fused to their outer ends.
Inventors: |
Anderson; Karl R. (Pasadena,
CA) |
Assignee: |
Thompson; John T. (Los Angeles,
CA)
Gillemot; George W. (Santa Monica, CA)
|
Family
ID: |
22639679 |
Appl.
No.: |
05/175,281 |
Filed: |
February 26, 1971 |
Current U.S.
Class: |
439/310; 379/332;
439/43; 439/431; 439/922; 379/327; 439/372; 439/638 |
Current CPC
Class: |
H04Q
1/142 (20130101); H04Q 1/141 (20130101); H04Q
1/023 (20130101); H04Q 1/021 (20130101); Y10S
439/922 (20130101) |
Current International
Class: |
H04Q
1/14 (20060101); H04Q 1/02 (20060101); H01r
013/54 () |
Field of
Search: |
;179/175,98 ;324/51,73
;339/29,28,18,252,278,255,91,150,108,151,45,198,75 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
IBM Technical Disclosure Bulletin, Vol. 3, No. 1, June, 1960,
"Isolation Circuit Tool", Northrop et al..
|
Primary Examiner: Champion; Marvin A.
Assistant Examiner: Lewis; Terrell P.
Claims
I claim:
1. A gang connector assembly clampable immovably along the full
length of a phone system terminal board having a multiplicity of
pairs of terminal lugs arranged in closely spaced rows from end to
end thereof to provide a temporary separate patch connection to
each of said lugs, said connector assembly having a main body
generally coextensive in length with said terminal board and
reciprocably supporting a plurality of separate spring biased
contactors each positioned to engage a respective one of the lugs
in a plurality of rows thereof extending lengthwise of said
terminal board, flexible cabling means including separate wire
connections to each of said contactors and extending from said main
body to a remote area, a plurality of pairs of manually adjustable
jaws pivotably supported along the opposite sides of said main body
having inturned free ends engageable with the opposite lateral
edges of the terminal board and effective when adjusted to compress
the springs of said spring biased contactors and force the same
simultaneously into pressure contact with a respective one of said
lugs as said main body is moved bodily toward the terminal board,
and locator strut means projecting from said main body to one side
of said contactors and positioned to engage the terminal body and
cooperating therewith and with said clamping jaws to stabilize and
hold said connector assembly rigidly and immovably clamped to said
terminal board without risk of damage to said terminal lugs or said
contactors.
2. A gang connector assembly as defined in claim 1 characterized in
that said contactors have a well in the outer end thereof seating a
plurality of sharp pointed pins fused into said well.
3. A gang connector assembly as defined in claim 1 characterized in
that said locator strut means is located at the opposite ends of
said main body.
4. A pair of gang connector assemblies each constructed as defined
in claim 1 and connected to the opposite ends of the conductors of
a flexible patching cable, said patching cable including a separate
conductor having the opposite ends thereof connected to a similarly
positioned contactor on a respective one of said gang connector
assemblies, and said gang connector assemblies being clampable to a
respective phone system terminal board each having a multiplicity
of pairs of terminal lugs with a lug of each in pressure contact
with a respective spring biased contactor of an associated one of
said gang connector assemblies to provide independent electrical
connections between the respective lugs of said terminal boards.
Description
This invention relates to patching cable assemblies and more
particularly to unique equipment of this character and to a mode of
utilizing the same to provide bypass communication channels in
parallel with certain normally premanent conductive paths thereby
permitting the latter to be serviced or replaced without
interrupting phone service.
Serious problems arise in telephone central station facilities
whenever it becomes necessary to replace, consolidate, or service
certain of the equipment interconnecting the main service cables of
the system and their connections to switching gear within the
central station. Typically, the equipment with which the present
invention is concerned is that portion interconnecting the main
frame and the intermediate distributing frames. This portion of the
equipment includes the large numbers of terminal boards extending
in horizontal rows on the horizontal side of the main frame and the
mass of wires connecting these terminal boards to similar terminal
boards arranged in vertical rows on the intermediate distributing
frame, and often designated IDF. For example, expansion of a phone
system may necessitate the installation of more compact and highly
concentrated terminal boards along with new connections extending
between the horizontal side of the main frame and the IDF.
Thousands of wires and terminals boards of more modern design must
be replaced or rearranged and substituted for prior antiquated
equipment. This is an extremely laborious time-consuming task
requiring the services of many expert technicians and is
accompanied by intolerable interruptions in telephone service to
subscribers and requires most complex checking and testing before
completing the operation.
By the present invention there is provided a far simpler, faster
and highly reliable technique of servicing and converting from old
to new components substantially without any or negligible
interruption in phone service. This is accomplished by the
invention gang connector patching assemblies provided in as many
sets as necessary for a particular operation. Each set comprises
one or more flexible patching cables of the requisite length to
bridge the distance between the two frames. The opposite ends of
these cables are connected by separable couplings to tap shoe units
each having the requisite number of independent contactors to make
simultaneous connection to the terminals of a particular terminal
board of the type in use in that central office. These gang
connectors include simple, easily operated clamping means for
holding all contactors of that connector assembly in firm and
simultaneous contact with all terminals of the particular terminal
board. When the gang connector assemblies at the opposite ends of
the cables have been clamped in place there is provided a separate
conductive patching path in parallel with each conductor of the
existing system. It is now possible to disconnect the old wires
from the terminal boards at either end of the patching facility
while maintaining service over the conductors of the patching
cable. Likewise the former terminal boards may be disconnected from
their respective frames and moved sufficiently to permit new
terminal boards to be installed following which individual pairs of
wires are shifted from the old terminal board to the corresponding
terminals of the new board without any interruption in service.
Each gang connector assembly or unit comprises an elongated, hollow
main body reciprocably supporting a multiplicity of spring biased
contactors each equipped with a plurality of sharp pointed needles
on its outer end. Each contactor is connected internally of the
shoe body to a pin of a female connector coupling to which a
connector of the patching cable coupling is mateable. The housing
includes clamping jaws controlled by a common thumb nut to lock the
jaws in position over the opposite lateral edges of a terminal
board with each contactor in pressure contact with one of the wire
terminals. Locator struts carried by the connector body abut
surfaces of the terminal board and support the connector assembly
with its contactors accurately aligned with respective ones of the
wire terminals. The gang connector at the other end of the patching
cable may be of the same or different construction depending upon
the type of terminal board in use in the central station
equipment.
Accordingly, it is a primary object of the present invention to
provide a unique patching cable assembly and method usable in
telephone central office facilities to maintain uninterrupted
telephone service while certain components of the equipment are
being replaced, serviced or repaired.
Another object of the invention is the provision of a novel
patching cable set having specially constructed gang connector
assemblies at its opposite ends equipped with means for quickly
securing the same in place over a respective phone system terminal
boards thereby quickly and reliably establishing an alternate group
of communication connections between two terminal boards remotely
spaced from one another.
Another object of the invention is the provision of simple
easily-operated patching cable equipment for quickly establishing a
new series of connections between the rear of a telephone main
frame and a related terminal board on the intermediate distributing
frame in the same station.
Another object of the invention is the provision of a gang
connector assembly specially designed for ease of attachment to and
detachment from a terminal board and having provision for
connecting its independent contactors to other equipment via a
flexible patching cable.
Another object of the invention is the provision of a multiple
conductor connector assembly having independent contactors each
having a plurality of sharply pointed contact pins fused to its
outer end.
Another object of the invention is the provision of a gang
connector assembly having a multiplicity of independent contactors
each spring biased to an extended position and provided with means
for adjusting the spring tension on a plurality of the contactors
simultaneously.
Another object of the invention is the provision of a gang
connector assembly for attachment to a multiple contact terminal
board and including locator strut means cooperating with means on
the terminal board to assure accurate positioning of the assembly
as it is clamped in place on the terminal board.
These and other more specific objects will appear upon reading the
following specification and claims and upon considering in
connection therewith the attached drawing to which they relate.
Referring now to the drawing in which a preferred embodiment of the
invention is illustrated:
FIG. 1 is a diagrammatic view showing the patching gang connector
assembly positioned for assembly between a terminal board on the
horizontal side of a main frame and a second terminal board on an
intermediate distributing frame;
FIG. 2 is a top plan view of one preferred embodiment of the
invention gang connector assembly assembled to a typical terminal
board;
FIG. 3 is an end view on an enlarged scale taken from the right
hand end of FIG. 2 with parts broken away to show details of the
construction;
FIG. 4 is a fragmentary side elevational view taken along line 4--4
on FIG. 3;
FIG. 5 is a front elevational view of a second preferred embodiment
of the gang connector clamped against the downwardly facing side of
another common terminal board construction;
FIG. 6 is an end elevational view on an enlarged scale taken from
the right hand end of FIG. 5 with parts broken away to show
constructional details;
FIG. 7 is a fragmentary sectional view taken along line 7--7 on
FIG. 6; and
FIG. 8 is a fragmentary cross sectional view taken along line 8--8
on FIG. 6.
Referring initially to FIG. 1, there is shown diagrammatically a
representation of the invention patching gang connector assembly,
designated generally 10 in readiness to have one end clamped to a
terminal board 11 on main frame 12 and its other end clamped to
terminal board 13 supported on IDF 14. Each of the patching
connector assemblies 10 includes at least one and, in the case of
larger capacity connectors, with several flexible cables 16, a
first gang connectors 17 and a second gang connector 18.
It will be understood that main frame 12 and intermediate
distributing frame 14 are of any well known construction and
customarily installed in different parts of a telephone central
office. A typical telephone service cable 20 is shown at its
entrance to the central office and each of its conductors is
soldered to one end 21 of individual terminal strips arranged along
one side of terminal boards 22. The terminal strips extend
crosswise of the boards with their ends terminating along the
opposite lateral edges of the boards. The other ends 23 of these
strips are connected to individual wires indicated as a group 24
arranged on shelves of main frame 12 and having their other ends
connected to the ends 25 of similar terminal strips on rows of
horizontally arranged terminal boards 11 arranged along the rear or
so-called horizontal side of the main frame. The other ends 26 of
each of the terminal strips lie along the upper lateral edge of
boards 11 and each is connected to a separate wire indicated as a
group by reference 27. The wires are suitably supported and pass
overhead between frames 12 and 14 to rows of terminals 29 of
terminal boards 13 on frame 14. The opposite ends 30 of these same
terminal strips are in turn connected by individual wires,
indicated at 31, extending to the central office switch gear well
known to those skilled in the telephone art and indicated
diagrammatically at 32.
Switch gear 32 operates in known manner to make connections to a
pair of wires of other cabling and connected by cabling, not shown,
back to a terminal board on frame 14 and thence through other
conductors similar to 27 to a terminal board on the horizontal side
of main frame 12 and thence through conductors 24 to a terminal
board on the front of the main frame and thence via overland
conductors to a desired subscriber.
The invention patching gang connector assembly 10 is readily
connectable between a selected one of terminal boards 11 and 13 to
provide a series of parallel connections between each of the
terminals 26 on board 11 and terminals 29 on board 13, thereby
permitting each of the wires indicated as a group at 27 to be
replaced, or, in the alternative, to be transferred to
corresponding terminal lugs on a substitute terminal board at
either or both ends of these wires.
Referring now to FIGS. 2, 3 and 4 there is shown details of gang
connector 17 clamped to terminal board 11. As is well known,
terminal board 11 has a main body of non-conductive material 35 to
which is suitably clamped closely spaced set of terminal strips by
means of the non-conductive clamping strips 36 and bolts 37. The
ends 25 of each of these strips is Y-shaped and to at least one arm
of each of which is soldered one of the wires 24 extending from
ends 23 of the terminal strips of block 22. The other ends 25 of
terminal strips on block 11 is soldered to one of the overhead
wires 27 leading to terminal blocks 13 on the intermediate
distributor frame 14. It will be understood that individual ones of
wires 24 enter through separate openings 38 of main body 35 whereas
wires 27 pass through similar openings 39 along the other edge of
the terminal board.
The terminal shoe assembly 17 at the left hand end of patching
assembly 10 has an elongated hollow main body 40 formed of
insulation material, the parts being held assembled by screws 41.
Bottom wall 42 (FIG. 3) is formed with rows of holes loosely
supporting metallic contactors 43. The upper ends of these
contactors have a loose sliding fit in an insulation plate 44 held
in assembled position by a pair of spaced-apart adjustable screws
45 extending into threaded wells in bottom plate 42. Surrounding
the mid portion of each contactor 43 is a compression spring 46
having one end bearing against a flange 47 embracing the contactor
and its other end bearing against the underside of plate 44. So
long as the connector is not assembled to a terminal board, spring
46 urges the contactors to their fully extended position with the
stop collars 47 bearing against the interior surface of the bottom
wall 42 of the main housing. As will be recognized, the springs are
also effective to hold plate 44 against the heads of screws 45,
with the result that the pressure spring can be adjusted by simply
rotating screws 45 inwardly or outwardly. Thus, if screws 45 are
adjusted outwardly, the springs apply less pressure on the
contactors whereas if the screws are tightened, the springs hold
the contactors extended with greater force.
The upper ends of each of the contactors 43 are connected by a wire
50 to a separate female socket of a multiple pin electrical cable
coupling, the female socket 51 of which opens through the side wall
of the main housing as indicated in FIG. 3. Since such cable
couplings or disconnects are well knonw, the constructional details
are not shown. However, it will be understood that the male portion
52 (FIG. 1) of these disconnects mates snugly with the female
portion 51 and is locked against disassembly by a locking device
best shown in FIG. 2. This device comprises a bracket 54 fixed to
the main body 40 of the shoe and having a thumbscrew 55 at its
outer end which can be tightened against the swinging clamping arm
56 overlying the female connector half 51. The thumbscrew 55 is
loosened and the clamping arm 56 is rotated to the position shown
in FIG. 3 thereby permitting the male coupling member 52 to be
assembled to half 51. Thereafter, clamping arm 56 is rotated to
overlie the outer end of the coupling and held in this position
until the thumbscrew 55 has been firmly tightened.
The means for holding connector 17 rigidly clamped to terminal
board 11 comprises two sets of clamping jaws 60,60 having the
configuration best shown in FIG. 3. The upper ends of the J-shaped
clamping jaws are pivotally connected by pins 61 to a common
aligning member 62 having its midportion threaded and seating the
shank of a thumbscrew 63 having its lower end loosely anchored at
65 to the top side of the connector housing 40. Member 62 is
provided with a pair of holes 66 loosely accommodating the upper
ends of a pair of pins 67 fixed to the top of the connector
housing. Accordingly, thumbscrew 63 is effective to raise and lower
member 62 relative to the top side of the connector as pins 67
prevent member 62 from rotating and confine the latter and the
attached jaws 60,60 to bodily movement toward and away from the
connector until the locator struts 75 are seated firmly in corner
78 of board 11. Jaws 60 fit about the opposite lateral sides of the
main body 35 of the terminal block and after they are seated in
this position screw 63 is rotated in a direction to force the
connector contactors into firm electrical contact with separate
ones of the strip ends 25 as the lower ends of locator struts seat
in corner 78 of board 11.
These terminal strips are normally maintained in service for many
years and become coated with dirt, oxides and other foreign matter.
The multitude of tempered sharply pointed pins 70 fused to each of
the contactors 43 are found highly effective and important in
making certain of a good electrical connection with ends 25 of the
terminal strips. The ends of these terminal lugs, being exposed,
are frequently deformed in varying degrees. It is therefore
difficult to make a good low-loss electrical connection therewith.
It will therefore be appreciated that the nest of sharply pointed
pins 70 urged into pressure contact with the terminals by springs
46 are highly effective and reliable despite the oftentimes erratic
positions of the terminal lugs and the presence of coatings and
foreign matter. These pins are compacted into wells at the outer
ends of contactors 43 and anchored in place by solder or the like
fused metal and, like pins 70, of good conductive material.
As will be observed from FIGS. 3 and 4, the diameter of the groups
of pins in each contactor well is very substantially greater than
the thickness of the ends of the terminal strips 25. Accordingly,
these ends can be bent in either direction by a substantial amount
and yet be assured of good electrical contact with one or more of
the pins 70.
Referring now to FIGS. 5 to 8 there is shown a second preferred
embodiment of the gang connector assembly designed for use with a
terminal board 11' of a well known but distinctly different type
than that shown in FIGS. 2, 3 and 4. Terminal board 11' has a
T-shaped main body with a stem portion 11" of insulation material
extending the length of the T-head portion and having embedded
therein the mid portions of several rows of terminal strips having
ends 25' projecting from one face of the T-stem and other ends 26'
of the same strips projecting from the other face of the T-stem. As
is well known to those familiar with this type of terminal board,
the strips increase progressively in length toward the T-head
portion of the board and their ends are in alignment with the wire
receiving holes 38',39' with the wires for ends 25' entering
through rows of holes 38' along one side and the wires attachable
to the other ends 26' of the terminal strips entering through rows
of holes 39' along the other edge. These terminal strips usually
accommodate either 20 or 50 pairs of wires depending upon the
length of the particular board, the smaller size being illustrated
in FIGS. 5 to 8. It will be understood that the hollow housing 40'
of tap shoe 17' and the arrangement of the contactors 43',43'
therein is substantially identical with that described above in
connection with FIGS. 2 to 4. Accordingly it will be unnecessary to
repeat that description here.
A principal difference resides in the clamping means provided to
hold the main body of the connector firmly assembled with its
contactors 43' in contact with individual ones of ends 25' or ends
26' of the terminal strips. For this purpose the opposite end walls
75,75 (FIG. 5) of the connector housing are extended beyond the
ends of contactors 43' and to the extent best shown in FIG. 5 to
provide clamping jaws to hold the connector assembly to a terminal
board. The adjacent interior surfaces of these projections are so
spaced as to have a close sliding fit with the opposite ends of the
T-stem portion 11" of the terminal board. This assures that
individual ones of the contactors 43' will be aligned with the ends
25' or 26' of particular terminal strips depending on which face of
the board the connector is being clamped to.
Secured to the ends of clamping jaws 75 are clamping screws 63',
the screw at one end of the connector being located near the upper
corner of one clamping jaw 75 and the screw 63' on the other jaw
being located near the opposite end corner of the jaw. This
staggered arrangement is advantageous in obtaining more uniform and
reliable contact between the pointed contactor pins 70' and the
ends of the terminal strips.
Secured to and projecting laterally from one edge of each clamping
jaw is a locator strut 77' shaped as best shown in FIG. 6 and
having its lower end tailored to seat against surface 78' of the
terminal board thereby properly supporting the connector contactors
43' for contact with the ends 25' of the contact strips as the
thumbnuts 63' are tightened and with the bottom wall of the shoe
lying substantially parallel to a plane passing through the ends of
the terminal strips. Thus, in attaching the connector to the
terminal board the operator loosens the clamping thumbscrews 63'
and then lowers the connector assembly over the T-stem portion 11"
of the terminal board. Once both of the struts 77' are seated
against surface 78' the operator holds the connector assembly in
this position as he tightens first the thumbscrews 63'. As he does
so, the various contactors 43' retract into the body of the
connector by varying amounts as springs 46' apply pressure to the
pointed pins 70' causing these to cut through any coating or
foreign matter on terminal ends 25'. As soon as the thumbscrews are
firmly tightened and a check has been made to determine that each
of the contactors is making good contact with the associated
terminal end, the connector assembly is ready for use. If the
patching cable connector has not been installed in coupling fitting
51' this is done and clamping jaw 56' is tightened by means of
thumbscrew 55'.
While the particular gang connector and patching cable assembly and
method of using same herein shown and disclosed in detail is fully
capable of attaining the objects and providing the advantages
hereinbefore stated, it is to be understood that it is merely
illustrative of the presently preferred embodiment of the invention
and that no limitations are intended to the details of construction
or design herein shown other than as defined in the appended
claims.
* * * * *