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Патент USA US3087249

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April 30, 1963
Filed Dec. 12. 1960
f / /
aired States Patent Gfice
Patented Apr. 30, 1963
The body portion 12 is generally of cylindrical contig
uration having an axially extending bore 16 formed there
lloc Milo Porter, Fnlierton, Calif., assignor to Northrop
Corporation, Beverly Hills, Galif., a corporation of
and terminating -short of the other end. External threads
in, »the bore :being open at one end of the body portion
17 are provided on the end of the portion 12 on which the
bore 16 opens, formed on the other end of 4the portion 12
is an axially extending projection 18. The projection 18
is characterized in that it is rectangular in cross-section,
its width greatly exceeding its thickness (these dimensions
This invention relates to a disengaging tool and more
being compatible with dimensions of the connector with
particularly to a hand operated «tool ‘facilitating the re
Filed Dec. 12, 1%0, Ser. No. 75,187
4 Claims. (El. 29-206)
moval of electrical lead ends from multiple connectors or
the like.
In various electrical installations it is common prac
tice to have a pluraltiy of electrical leads terminate in a
common connector or terminal receiving block. Such
4a connector has many advantages for example, it provides
a compact means whereby a plurality of electrical leads
or connectors may be connected to and disconnected from
another set of electrical leads or connectors, it maintains
which it is to be used).
The projection 18 serves to
locate the tool 11 in :an associated connector in a manner
which will be explained presently, therefore, the projec
tion 18 is referred to hereafter as a location key.
A freeing mem-ber 19 is also provided on the tool 11.
The member `19 is also characterized in that it is rec
tangular in cross-section, its width and thickness being
quite small with respect to the key 18. The member 19
may be secured to the tool `11 in any suitable manner,
however, its outer end 21 is substantially coextensive with
all leads in fixed relation to the receptacle, it insures good 20 the key 18 but has a spaced relation therewith. In the
electrical connections, etc.
embodiment shown the member 19` is -secured to a charn
To effect the union or connection between two sets of
fered surface formed on vthe body portion 12 as best seen
leads or connectors by means of the aforementioned con
in FIGURE 4 and is rigidly ‘held in proper alignment in
nector the terminal ends of electrical leads, that is lthe
25 that it is bottomed in a groove 22 and secured therein by
ends which are to be inserted and retained in the connec
tor, are provided with spring clips or the like. These
spring clips cooperate with the receptacle to effect and
maintain ka lirm gripping relation -in the receptacle ,and in
a screw 23.
The member 19‘ should be constructed of a
good grade of steel so that, although its cross-section is
quit-e small, it will be sufficiently rigid to perform the
function for which it is intended. Due to the shaped and
sure a good electrical connection between the leads and
strip-like configuration of the member 19, also due to the
a complementary set of leads. Quite frequently it becomes
fact that it is constructed of .a >good grade of steel, enables
necessary to al-ter or remove one or more of the especially
the length of its projecting end 21 to be altered within
prepared connector ends from the connector, and this
operation generally turns out to be quite troublesome and
time consuming. To the best of applicant’s knowledge
limits. This feature insures that the projection 18 will
normally bottom `before the projecting end 2.1 at such
operation, accordingly »the operation is usually effected
may be rendered longer than the projection 18 if it be
times as the tool l11 is being positioned in an associated
no special tool has ever been developed to perform this 35 connector plug. Also the length of the projecting end 211
using some crude instrument such as a wire, nail, bobby
comes necessary to do so.
When adjusted to a desired
pin, etc.
length the member 1‘9 is secured in this position by means
of one or more of ’the terminal ends of electric leads
from a multiple connector.
having a `knob 26 formed on one end thereof and termi
Accordingly it is an object of the invention to provide
the screw 23.
a hand operated tool facilitating the individual removal 40 of The
plunger 14 constitutes a cylindrical rod portion 214
nating at its other -end in a cylindrical rod 27> off less di
ameter than the portion 24. Inasmuch as the terminal
end 27 of the plunger is utilized to eject the clipped end
multiple connectors, which is simple in design yet rugged 45 of an electrical connector from an associated receptacle
in construction and which is economical to manufacture.
it is hereafter referred to as ejector member 27.
Although the characteristic features of the present in
'[lhe plunger 14 is assembled fin the body portion 12
vention are particularly pointed out in the appended
substantially :as shown in FIGURE 3. The ejector mem
claims, the invention itself, also the manner in which it
ber 27 passes through an axial bore 28 and the plunger
operates will be better understood by referring to the 50 14 is held in position in the body portion l12 by means
following description taken in connection with the accom
of a hand nut 29. The plunger 14 is normally urged to
panying drawings forming a part of this application and
its retracted position as shown in FIGURE 3 and is nor
in which:
mally actuated to its extended position in which the ejec
FIGURE 1 is a fragmentary perspective View of the dis
tor member is substantially coextensive with the key 18
engaging tool as disclosed herein shown in its .pre-entry 55 and member 21.
position »in association with a multiple connector with
The structural features of `the tool 11 having been de
which -itis to be used.
scri-bed, a better understanding thereof will be forth-corn
FIGURE 2 is an enlarged fragmentary side view of tool
«ing from the following description of its operation.
shown in FIGURE l in its inserted position in an associ
The tool 1‘1 is utilized to individually remove any one
ated connector, the latter being shown in section to better 60 of a pluraltiy of electrical leads <31 from a multiple con
illustrate the relationship between the tool and connector.
nector or receptacle 32 the construction of which is well
FIGURE 3 is a side View of the disengaging tool shown
known. 'Ilhe end of the leads ‘31, that is the ends which
in FIGURE l.
enter the connector 32, are provided with clips 33- which
FIGURE 4 is a sectional view of the disengaging tool
function to secure the leads 31 in the «connector 32 in a
as indicated by the arrows 4-4 of FIGURE 3.
65 manner which is also Well known.
Another object is to provide -a hand operated tool
which may be readily adapted to use with mo-st types of
FIGURE 5 is an end of the disengaging tool as indi
To remove a lead 31 from the connector 32 the locating
cated by the arrows S-S of FIGURE 3.
key 18 -is inserted and bottomed inthe central channel 34
A preferred embodiment of the disengaging tool as dis
of the connector 32 at a location directly opposite the
closed herein is shown in FIGURES 3-5, Iand in these lig
lead '31 which .is to be removed. This operation causes
ures the tool is identified generally by the numeral 11. 70 the freeing member end 21 to wedge itself between the
Principal components of the tool 11 include a body por
clip 33 and the outside Wall of the connector 32 thus free
tion 12 and a plunger portion 14.
ing the barb 36 of the clip from the ledge 37 formed in
the wall of the connector 32. During this operation it
will be seen that the key 18 has also functioned to depress
the inboard end of Áthe clip 33 and thus free its terminal
end from the central ledge 38.
It will now be seen by referring to FIGURE 2 that
-the `)barb ‘36 and inboard end of the clip 33 are freed from
their retaining means and the clip is now free lto be ejected
from the connector 32. This is accomplished by urging
the plunger 14 to its extended position. Actuating the
plunger to its extended position brings the ejector mem
ber 27 into contact with the clip ‘33 and forces it and the
lattached lead ?'om the connector 32.
While in order to comply with the statut-e, the invention
llas been described in language more or less specific as to
structural features, it is tol be understood that the inven
tion is not limited »to the specific yfeatures shown, but that
the means and construction herein ydisclosed comprise a
preferred form of putting the invention into effect, and
forth in claim ll: characterized in that said Ipair of spaced
projections are rectangular in cro-ss-section the width of
which greatly exceeds their thickness, one of said projec
tions Ibeing shaped as an alignment key for said tool in
the connector Worked on, and 4the other said projection
having a
thickness ‘to be forced ‘between the clip
and its seat in the connector.
3. A 4hand tool `facilitating the removal of clipped ends
of electrical leads from a multiple connector plug com
prising: an elongated body port-ion having a plunger mem
.iber operationally mounted therein; said tbody portion
lhaving a pair of rigidly mounted spaced projections
formed on one end thereof and extending in the longitudi
nal direction of said body portion; said projections being
dimensioned and »shaped to «ñt into the open end of an
individual connector channel carrying a spring clip to
be removed, with said projections straddling the clip end
to force 'the clip away from the connector walls; said
plunger in its assembled relation in said body portion hav
the invention is therefore claimed in any of its forms or 20 ing one end thereof positioned between and immediately
'modifications within the legitimate and valid scope of
adjacent to said pair of spaced projections; spring means
lthe appended claims.
What is claimed is:
mounted in said body portion normally urging said
plunger member to a retracted position in which the one
‘1. A tool facilitating the removal of clipped ends of
end of said plunger memfber lis retracted into said body
electrical leads from a multiple connector plug compris 25 portion out of contact with the clip; and knob means
ing: a body portion having a plunger member operation
mounted -on the other end of said plunger member where
ally mounted therein; said body portion »having a pair of
by fthe latter may be «manu-ally movable to 'an extended
rigidly mounted spaced projections formed on one end
thereof; said projections being dimensioned and shaped
position in which the one end of plunger member is sub
stantially coextensive `with said pair of spaced projec
to fit into the open end of an individual connector channel 30 tions tand wherein said plunger enters the connector and
carrying :a spring clip to be removed, with said projections
pushes the clip from its installed position.
straddling the clip end to force the clip away from the
4. A tool facilitating the removal of clipped ends of
connector walls; said plunger in its assembled position in
electrical leads from «a multiple connector plug as set
said body portion lhaving one end thereof positioned be
forth in claim 3: characterized in that said pair of spaced
tween and immediately adjacent to said pair of projections; 35 projections are rectangular in cross-section the width of
and said plunger member being movable with respect to
wihio'h greatly exceeds their thickness; one of said projec
said 'body portion between a retracted position in which
tions being shaped as an yaligrnnent key for said tool in
the one end of said plunger member is retracted into said
the connector worked on, and the other said projection
body portion out of contact with the clip and an extended
having a minimum thickness to be A‘forced Ibetween the
position coextensive with said pair of spaced projections 40 clip and its seat in the connector; and the outer end of
wherein said plunger enters the connector and pushes
said one projection being «blunt to seat against an internal
the clip from its installed position, :and knob means
abutment in the connector.
mounted on the other end of said plunger member for so
moving manually said plunger member to its said extend
ed position.
2. A `tool facilitating the removal of clipped ends of
electrical leads from a multiple connector plug as set
References Cited in the file of this patent
Alderman ____________ __ July 28, 1959
Petersen ______________ __ Dec. l, 1959
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