U.S. patent number 3,752,901 [Application Number 05/174,068] was granted by the patent office on 1973-08-14 for foil connector.
Invention is credited to Lai Che Kuo.
United States Patent |
3,752,901 |
Kuo |
August 14, 1973 |
FOIL CONNECTOR
Abstract
An electrical connector for engagement preferably with
relatively thin conductive material comprising, in one embodiment,
a pair of generally planar interengaging members matingly arranged
in spaced, opposing relationship. Each of preferably a plurality of
preferably tapered piercing members selectively disposed adjacent a
first surface of at least one of said members is arranged to
penetrate through thin conductive material interposed between said
members and extend into and be deformed about an associated
selectively proportioned transverse aperture in the mating member
as said members are compressively urged against the intervening
conductive material, to establish a secure connection therebetween.
Each of the members may be provided with one or more extending
portions for coupling the connector to a further conductor or
support member. Other embodiments include a multiple of spaced,
interengaging members similarly comprising selectively disposed
transverse apertures and mating piercing members.
Inventors: |
Kuo; Lai Che (Elizabeth,
NJ) |
Family
ID: |
22634676 |
Appl.
No.: |
05/174,068 |
Filed: |
August 23, 1971 |
Current U.S.
Class: |
174/84C;
439/442 |
Current CPC
Class: |
H01R
4/2495 (20130101); H01R 4/06 (20130101) |
Current International
Class: |
H01R
4/24 (20060101); H01R 4/00 (20060101); H01R
4/06 (20060101); H01r 011/08 () |
Field of
Search: |
;339/95R ;174/84C,94R
;24/36,265A,67,153BP |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Champion; Marvin A.
Assistant Examiner: Pate, III; William F.
Claims
The embodiments of the invention in which an exclusive property or
privelege is claimed are defined as follows:
1. A connection comprising: a connector having at least one first
and second members, each having a first surface and a second
surface, said first surfaces being arranged in generally spaced,
opposing relationship to define an article receiving cavity
therebetween; said second member having at least one first
transverse aperture therethrough, extending between said first
surface and said second surface thereof; a first recessed portion
of substantially uniform depth completely surrounding said first
transverse aperture adjacent the opening formed by the
communication of said first transverse aperture and said second
member second surface; a sheet of thin material situated between
said first and said second members, and at least one first piercing
means disposed adjacent said first member first surface and
protruding outwardly therefrom generally normal to the plane
thereof, said first piercing means being dimensionally proportioned
to fit closely within said first transverse aperture, the height of
said first piercing means being greater than the thickness of said
second member, said first piercing means terminating in a free end
aligned with an associated first transverse aperture , said first
and second members being pressed together so that said first
surfaces thereof are in intimate contact with said sheet of thin
material at least said free end of said first piercing means
penetrating said sheet of thin material and expansively laterally
deformed within the area of said first recessed portion of said
associated first transverse aperture to provide an enlarged head
portion thereat seated in said first recessed portion and extending
outwardly beyond the area defined by the communication of said
associated first transverse aperture and said second member second
surface to independently lock said first and said second members
together intimately about said thin material.
2. A connection as defined in claim 1 wherein said first piercing
means comprises a generally tapered member having its larger end
disposed adjacent said first member first surface.
3. A connection as defined in claim 1 further comprising a raised
shoulder portion surrounding said first transverse aperture
adjacent the opening formed by the communication of said first
transverse aperture and said second member first surface, said
raised shoulder portion communicating generally with the base of an
associated first piercing means upon the closure of said first and
said second members, to further entrap a portion of such thin
material therebetween.
4. A connection as defined in claim 1 further comprising an
extending portion coupled to at least one of said first and second
members for coupling said connector to a further article disposed
adjacent thereto.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention is directed to the field of connectors and
principally to a connecting device for thin conductive
material.
2. Description of the Prior Art
Prior art connectors for electrical conductors or the like,
generally comprised, in one form or another, a generally deformable
ferrule portion adopted to be mechanically crimped about the end of
a conductor inserted therein. With the advent of thin conductive
material commonly known as foil conductor, and the increasing
employment thereof in electrical wiring, a need for suitable means
to effect a secure mechanical and electrical connection to such
material was recognized. Attempts to provide an adequate connection
to the foil-like material generally comprised joining by welding,
brazing, or soldering, which methods often proved to be expensive,
time consuming, and inconvenient, requiring relatively specialized
and cumbersome equipment. Further, because of the fragile nature of
the foil material, it was necessary to use extreme care in
effecting the desired connection by such means, to prevent damage
thereto. The various embodiments of toothed connectors developed
for use with foil type material have generally been unsatisfactory
because of the tendency of such connectors to merely pierce and
mechanically damage the material while failing to provide adequate
retention and protection adjacent the area of connection.
SUMMARY OF THE INVENTION
The invention overcomes the problems and limitations noted above
with respect to such prior art connecting means by providing a
readily crimpable connector having interlocking piercing members
and receiving apertures therefor suitably arranged to pierce and
securely retain a portion of a foil material interposed between the
members thereof while affording an effective means for
intercoupling said members. The connector may be formed as a single
folded member or as a series of interconnected spaced, generally
planar members disposed in generally overlapping arrangement. Each
of one or more foil-piercing members formed preferably as tapered
protrusions extends outwardly from a surface of one member and is
selectively proportioned for mating engagement with an associated
transverse aperture in a mating member. Each member may be provided
with a succession of alternating piercing members and apertures for
engagement with a similar arrangement in the mating member. Each of
the tapered protrusions may be appropriately modified to provide,
for example, either a generally bifurcated terminating end or a
spear-like extension to enhance the desired penetration of the foil
material and the subsequent deformation of the free end of the
piercing member adjacent its associated mating aperture. The mating
members may be formed of any suitable material adapted for use with
conductive material, which may include copper, aluminum, brass or
the appropriate alloys thereof, or a combination of such
materials.
In use, the mating members of the connector are disposed on either
side of a portion of the foil material to which such connector is
to be attached, and compressed thereagainst by interposing the
members between the jaws of an appropriate tool. The free end of
the piercing members are thus caused to penetrate the foil and
enter into and partially extend beyond an associated transverse
aperture in the mating member, thus contacting an immediately
adjacent portion of the compressing tool and deforming about the
opening adjacent thereto. The resultant deformation causes an
expansion of said free end partially within the transverse passage,
and partially adjacent the opening formed by the communication of
said passage with the surface of said member remote from the foil
engaging surface, to lockingly engage the mating members one to
another while securely engaging the foil material therebetween.
Upon the penetration of the piercing member therethrough, a portion
of the foil material directly adjacent the piercing member is urged
into the respective transverse passage and effectively sandwiched
between the adjacent passage wall and piercing member surface, thus
affording additional engagement thereat. The portion of the foil
material extending beyond the transverse passage, after
penetration, is caused to expand outwardly beneath the deformed
piercing member end to additionally secure the foil material to the
connector and improve the electrical connection therebetween. Each
transverse passage may be suitably recessed to permit the free end
of the piercing member to be at least partially deformed thereinto,
thus providing a relatively smooth transition between said end and
the adjacent connector surface. Further, the area surrounding the
opening formed by the communication of the transverse passage with
the foil engaging surface of the connector may be appropriately
raised to provide increased pressure thereat. It is therefore an
object of this invention to provide an improved connector.
It is a further object of this invention to provide connecting
means for relatively thin material.
It is another object of this invention to provide an electrical
connector for foil conductors.
It is still another object of this invention to provide a
mechanically crimpable connector having interengaging members.
It is still a further object of this invention to provide a
multielement connector for foil conductor material.
It is yet another object of this invention to provide a connector
having means arranged to pierce and securely retain foil conductor
material between the members thereof.
It is still a further object of this invention to provide a
connector having disposed, on one member thereof, foil piercing
means arranged to penetrate a foil conductor adjacent thereto and
extend into and be deformed about a receiving passage in a mating
member to interengagably lock said members about the foil
conductor.
Other objects and features will be pointed out in the following
description and claims and illustrated in the accompanying
drawings, which disclose, by way of example, the principle of the
invention and the best mode contemplated for carrying it out.
BRIEF DESCRIPTION OF THE DRAWINGS
In the Drawings
FIG. 1 is a perspective view of a connector constructed in
accordance with the concepts of the invention.
FIG. 2 is a perspective view of another embodiment of a connector
constructed in accordance with the concepts of the invention.
FIG. 3 is a side elevational view of another embodiment of a
connector constructed in accordance with the concepts of the
invention.
FIG. 4 is a perspective view, partly in section, of still another
embodiment of a connector constructed in accordance with the
concepts of the invention, as engaged about relatively thin
material.
FIG. 5 is a fragmentary side elevational view, in section, of a
piercing member and associated aperture of a connector constructed
in accordance with the concepts of the invention, including a foil
conductor therebetween.
FIG. 6 is a fragmentary side elevational view, in section, of the
elements of FIG. 5 after assembly.
FIG. 7 is a fragmentary side elevational view, in section, of
another embodiment of a piercing member and associated aperture of
a connector constructed in accordance with the concepts of the
invention, after assembly to a foil material.
FIG. 8 is a fragmentary side elevational view, in section, of a
further embodiment of a portion of a connector constructed in
accordance with the concepts of the invention.
FIG. 9 is a fragmentary side elevational view, in section, of the
embodiment of FIG. 8 after assembly of the elements thereof to a
foil material.
FIG. 10 is a fragmentary side elevational view, in section, of
still another embodiment of a portion of a connector constructed in
accordance with the concepts of the invention, as assembled to a
foil material.
FIGS. 11 and 12 are fragmentary side elevational views, in section,
of still further embodiments of piercing members of a connector
constructed in accordance with the concepts of the invention.
Similar elements are given similar reference characters in each of
the respective drawings.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Turning now to FIG. 1, there is shown a connector 20 constructed in
accordance with the concepts of the invention. Connector 20
comprises, essentially, coupled first and second members 22 and 24,
respectively, hingedly arranged in generally overlapping spaced
relationship, substantially as shown. Piercing members 26 are
disposed on a first surface 28 of member 22 and extend upwardly
therefrom generally normal to surface 28. Each piercing member 26
is arranged for mating engagement with an associated aperture 30
extending between the first and second surfaces 32 and 34,
respectively, of second member 24, as said members 22 and 24 are
compressively urged together. Although shown as arranged in
essentially aligned relationship, piercing members 26 may be
disposed in selectively staggered or scattered arrangement adjacent
surface 28, as desired. One or more additional piercing members 36
similar to member 26, may be provided adjacent the first surface 32
of member 24, each being arranged for engagement with an associated
aperture 38 extending between the first and second surfaces, 28 and
39, respectively, of member 22. Piercing members 26 and 36 may be
formed by lancing, as shown for example in FIG. 1, or by skiving or
otherwise deforming the surface of either member 22 and 24, or,
alternatively, by affixing said members to the surface by welding,
brazing, soldering, or other commonly employed methods adaptable
therefor. Each of the piercing members 26, 36 may be formed as a
generally triangular element, substantially as shown in FIG. 1, or
may be suitably modified to provide a generally bifurcated member
as at 40 in FIG. 11, or a barbed-head configuration 42, as shown in
FIG. 12, each being equally as effective for the use and purposes
set forth herein. Each of the apertures 30 extending through
connector member 24 may be provided with a recessed portion 43
adjacently disposed thereabout, to receive the subsequently
deformed free end of an associated piercing member 26 in a manner
more fully described below. It will be readily apparent that
although apertures 30 are shown in FIG. 1 as generally rectangular
in shape, other alternative configurations such as round or
elliptical orifaces, for example, may be readily employed where
convenient or desirable, without departing from the spirit of the
invention and within the concepts herein disclosed. An extending
portion such as ferrule 44 may be affixed to or extend contiguously
outwardly from one or the other, or both, of connector members 22
and 24, although shown for convenience as extending from member 22,
where it is desired to affix connector 20 to a further article not
readily engageable within members 22 and 24. Where necessary or
desirable, ferrule 44 may be readily replaced by other suitable
extensions appropriately adapted for interengagement with, for
example, mating terminals, other connectors, or support
members.
Referring now to FIGS. 2 and 3 there are shown further embodiments
of a connector 46, 48, respectively, constructed in accordance with
the concepts of the invention. Connector 46 of FIG. 2 comprises
three selectively spaced generally overlapping members, 50, 52 and
54 each joined to an adjacent member preferably at one end to form
a tail portion 56, which although not essential, may be apertured,
as at 58, or otherwise configured, to provide a means for securing
connector 46 to a further connector or support member (not shown).
Each of the members 50, 52, 54 may be appropriately provided with
piercing members such as 60 and/or transverse apertures such as 62
in such combination and arrangement as to provide one or more sets
of mating elements, each set comprising a piercing member and a
receiving aperture therefor. Each piercing member 60 is arranged
for engagement with an associated aperture 62 as members 50, 52 and
54 are urged together. It will be readily apparent to those skilled
in the art that members 50, 52 and 54 may be conveniently co-joined
in accordian-like fashion, where desired, the resulting structure
being somewhat similar to that shown in FIG. 1, but differing,
however, by the addition of a further member coupled to member 24
at the end thereof remote from the juncture between members 24 and
22. Further, one or more pair of members similar to members 22 and
24 of FIG. 1 may be co-joined thereto at the juncture of said
members 22 and 24, providing a plurality of independently crimpable
connector portions. Where necessary or desirable, at least one
further member may be added to the connector 46 of FIG. 2 to
provide a connector such as 48, as shown in FIG. 3, wherein the
generally spaced overlapping members 64, 66, 68 and 70 are
essentially duplicative of members 50, 52 and 54 of connector 46
and are similarly provided with mating piercing members and
apertures, as described above with respect to connectors 20 and
46.
To more fully appreciate the concepts disclosed herein and at least
one manner of use of the device of the instant invention, reference
is now made to FIGS. 4, 5 and 6 wherein, in FIG. 4, there is shown
a connector 72 interengagedly disposed about, and joining, the
respective ends 74 and 76 of a relatively thin material 78, 80
interposed within the members 82, 84 of connector 72. To effect the
connection shown, the respective ends 74 and 76 of the material to
be joined are placed between connector members 82 and 84 in butting
contacting arrangement, substantially as shown, or overlapped, if
so desired. A compressive force is then applied to said members, by
means of an appropriately formed tool (not shown) to cause each of
the piercing members 86 to penetrate through the adjacent material
78, 80 and enter its respective aperture 88. The interrelationship
between members 82 and 84, piercing member 86 and its associated
aperture 88, prior to penetration, is more clearly shown in FIG. 5.
As may be seen in more detail in FIG. 6, a portion of the material
78 generally overlying the piercing member 86 prior to penetration
is urged along with piercing member 86 into aperture 88, and
thereby locked within the gap therebetween, as shown at 94 in FIG.
6. It should, of course, be readily apparent that the reference
herein to material 78 applies equally as well to material 80. The
end 96 of piercing member 86 extending beyond aperture 88 after
penetration is caused to be enlargeably deformed in generally
mushroom-like fashion upon its contact with the adjacent surface of
the jaw of the compressive tool, or other similar device, (not
shown) employed to close the connector members 82 and 84 upon the
ends 74, 76 respectively of material 78, 80. The deformation of the
free end 96 of piercing member 86 about the opening of passage 88
adjacent thereto further operates to intimately lock the connector
members 82, 84 together while securing the ends 74, 76 of material
78, 80, respectively, therebetween. It should be understood that
where there are more than two overlying, spaced connector members,
as shown, for example, in FIGS. 2 and 3, the free end of each of
the piercing members of one connector member may be suitably
arranged to extend through its mating aperture in the immediately
adjacent connector member and impinge against the adjacent surface
of the following connector member to effect the deformation thereof
similar to that shown in FIG. 6. As is further seen in FIG. 6, a
portion 98 of the material 78 urged through aperture 88 and
extending therebeyond is caused to be forcibly displaced outwardly
against the immediately adjacent recessed portion 90 of surface 92
of member 84 as end 96 of piercing member 86 is deformed
thereagainst, advantageously providing additional contact area
between the members 82 and 84 and the material 78 interposed
therebetween. Where necessary or desirable, aperture 88 may be
appropriately modified as shown, for example, in FIG. 10, wherein
the aperture defining walls 100 are selectively inclined to more
closely match the generally tapered contour of the mating piercing
member 102, wherein, by the suitable proportioning of piercing
member 102 and its mating aperture the portion 104 of material 78
adjacent piercing member 102 is effectively intimately wedged
within the gap between piercing member 102 and the aperture wall
100, and is additionally caused to undergo a less severe bending
than that resulting from the arrangement illustrated in FIGS. 5 and
6. Consequently, any tendency for the material 78 to fracture or
tear adjacent the area of angular deformation indicated as at 106
in FIG. 10 is thereby appreciably reduced, thus advantageously
maintaining a continuous area of contact between said material and
the surfaces of the connector immediately adjacent the zone of
penetration. The wiping action between the piercing member 102 and
the adjacent surfaces 108 of material 78 upon penetration may be
desirably increased by suitably serrating, or otherwise providing
discontinuities on the surface of piercing member 102. Where
necessary or desirable, a recessed portion such as 90 (FIG. 5) may
be provided adjacent aperture 88 to, for example, accommodate the
enlarged free end 96 of piercing member 86 (FIGS. 5 and 6) after
deformation, thus conveniently effecting a relatively smooth
transition between the piercing member end 96 and the surrounding
connector surface. The recessed portion 90 may, of course, be
eliminated, as shown, for example, in FIG. 7, the resulting
configuration being useful in those applications where it may be
desired that the resulting protrusion be disposed above the
immediately adjacent connector member surface. Where further
engagement between the opposing connector members 82, 84 and the
material 78, 80 interposed therebetween is desired, a raised
portion 110 (FIGS. 8 and 9) generally surrounding the piercing
member receiving aperture 112 adjacent the opening thereof
overlying material 78, 80 may be provided. As shown in FIG. 9, upon
the closure of the opposing connector members 82, 84 about the
material 78, the raised portion 110 is compressively urged against
the immediately adjacent portion of material 78, thus providing
additional engagement therebetween. It should be readily apparent
to those skilled in the art that the various embodiments and
arrangements described above and illustrated in FIGS. 5 through 12
may be readily employed in conjunction with any one of the
connectors shown and described herein without departing from the
spirit of the invention. It will be further appreciated that
although the device of the instant invention will find substantial
use as a connector for foil conductor material or the like, its use
is not limited thereby, the device being equally as applicable for
use with either nonconductive or semiconductive materials where it
is desired to effect merely a secure mechanical connector
thereto.
* * * * *