U.S. patent number 3,907,392 [Application Number 05/473,280] was granted by the patent office on 1975-09-23 for multi-terminal connector strip.
This patent grant is currently assigned to ITT Industries, Inc.. Invention is credited to Herbert Haag, Erich Kreutter, Wilfried Muller.
United States Patent |
3,907,392 |
Haag , et al. |
September 23, 1975 |
Multi-terminal connector strip
Abstract
A multi-terminal connector strip comprising a plurality of
socket contacts mounted in parallel spaced cavities formed in an
elongated insulator. The cavities open at opposite sides of the
insulator. Each socket contact is provided with two generally
overlapping spring members arranged in opposite directions of
orientation so that a pin contact may be inserted from either side
of the insulator into the socket contact. The insulator is formed
with breaking grooves so that the strip can be broken into required
lengths by the user. The connector strip may be fixed in several
different mounting positions, thus allowing a large range of
application of the connector.
Inventors: |
Haag; Herbert (Grossheppach,
DT), Kreutter; Erich (Winterbach, DT),
Muller; Wilfried (Fellbach, DT) |
Assignee: |
ITT Industries, Inc. (New York,
NY)
|
Family
ID: |
5883104 |
Appl.
No.: |
05/473,280 |
Filed: |
May 24, 1974 |
Foreign Application Priority Data
Current U.S.
Class: |
439/218; 439/682;
439/856; 439/862 |
Current CPC
Class: |
H01R
13/114 (20130101); H01R 12/737 (20130101); H01R
27/00 (20130101); H01R 2107/00 (20130101); H01R
12/58 (20130101) |
Current International
Class: |
H01R
13/00 (20060101); H01R 9/00 (20060101); H01R
027/00 (); H01R 011/22 () |
Field of
Search: |
;339/18P,18C,92R,32,33,176R,176M,258R,258C,258F,258P |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: McGlynn; Joseph H.
Assistant Examiner: Feinberg; C. R.
Attorney, Agent or Firm: Peterson; Thomas L.
Claims
What is claimed is:
1. A multi-terminal connector strip comprising:
an elongate insulator having a plurality of contact cavities
extending therethrough transversely with respect to the
longitudinal axis of the insulator, said insulator having a
mounting plane adapted to engage a mounting board;
a socket contact mounted in each of said cavities and provided with
a leg extending through said mounting plane for securement within a
hole in said board; and
each said socket contact having open end sections adjacent to the
opposite ends of its corresponding contact cavity defining entrance
holes for optionally receiving mating pin contacts inserted into
either end of said cavity, each said end section of each socket
contact having a U-shaped cross-section defining a base and a pair
of parallel legs, a generally flat, longitudinal bridge member
joining the bases of each said socket contact and being generally
coplanar therewith, each said socket contact having a pair of
spring members each having a fixed end connected to a leg of an
opposite one of said end sections on opposite sides of said bridge
member and a free movable end, said spring members extending in
opposite directions toward each other.
2. A multi-terminal connector strip as set forth in claim 1
wherein:
said longitudinal bridge member extends at an angle beyond at least
one of said bases and terminates in said securement leg.
3. A multi-terminal connector strip as set forth in claim 1
wherein:
said spring members of each said socket contact are arranged on
opposite longitudinal sides of said longitudinal bridge member
generally normal thereto and facing one another.
4. A multi-terminal connector strip as set forth in claim 3
wherein:
said spring members of each said socket contact are inclined
inwardly at an angle toward the longitudinal axis of said bridge
member and said free ends are reversely bent.
5. A multi-terminal connector strip as set forth in claim 1
wherein:
said insulator comprises a bottom part and a cover strip; and
the top side of said bottom part has transversely extending indents
therein in a parallel spaced relation subdividing the top side into
a plurality of support surfaces, said socket contacts being
positioned on said support surfaces.
6. A multi-terminal connector strip as set forth in claim 5
including:
an upstanding post in each corner of each said support surface;
and
the longitudinal sides of said bottom part having vertically cut
grooves therein aligned with said support surfaces.
7. A multi-terminal connector strip as set forth in claim 6
wherein:
downwardly opening recesses are formed in said cover strip aligned
with said support surfaces and separated by partition walls, the
wall surfaces of each said recess and support surface defines a
contact cavity; and
each said recess is terminated at its open ends by a three-sided
frame provided with insertion bevels.
8. A multi-terminal connector strip as set forth in claim 7
wherein:
said cover strip is located on said bottom part with said partition
walls thereof inserted in said indents in said bottom part; and
said frames rest on said posts.
9. A multi-terminal connector strip as set forth in claim 5
wherein:
said cover strip and said bottom part are bonded to one
another.
10. A multi-terminal connector strip as set forth in claim 1
wherein:
said securement leg extends from an end section of each said socket
contact at right angle along the longitudinal side of said
insulator.
11. A multi-terminal connector strip as set forth in claim 10
wherein:
the end of said securement leg is bent at a right angle with
respect to said longitudinal side of said insulator.
12. A socket contact comprising:
a pair of U-shaped end sections each defining a base and a pair of
parallel legs;
a generally flat, longitudinal bridge member joining said bases and
being generally coplanar therewith;
a mounting leg joined to at least one of said bases aligned with
said bridge member; and
a pair of spring members each having a fixed end connected to a leg
of an opposite one of said end sections on opposite sides of said
bridge member and a free movable end, said spring members extending
in opposite directions toward each other and inwardly toward the
longitudinal axis of said bridge member.
13. A socket contact as set forth in claim 12 wherein:
said spring members extend along opposite longitudinal sides of
said bridge member generally normal thereto and facing one
another.
14. A socket contact as set forth in claim 13 wherein:
said free ends of said spring members are reversely bent.
15. A socket contact as set forth in claim 12 being of one-piece
unitary construction.
Description
BACKGROUND OF THE INVENTION
The present invention relates generally to a multi-terminal
connector strip and, more particularly, to such a connector strip
containing socket contacts which may receive pin contacts from
either end thereof.
Connector strips with contact elements held in position in their
cavities are known in various forms. In German Petty Pat. No.
7003857, for example, there is shown and described a female
connector strip with through cavities disposed transversely in
relation to the longitudinal axis of the strip. Contact elements
are arranged in these cavities. Each contact element embodies
spring members for engagement with mating pin contacts. However,
due to the configuration of the socket contact, the pin contact may
be inserted thereinto from only one end. U.S. Pat. No. RE. 26,837
discloses a so-called box-type contact which may be either free
standing on a mounting board or inserted in cavities in an
insulator. This socket contact has a through passage which allows a
pin contact to be inserted completely thereto. However, the pin
contact may be inserted from only one end of the socket.
It is an object of the present invention to provide a connector
strip which can be easily and inexpensively manufactured and in
which pin contacts are capable of being inserted from more than
only one side.
SUMMARY OF THE INVENTION
According to the principal aspects of the present invention, there
is provided a multi-terminal connector strip comprising an
elongated insulator having a plurality of contact cavities
extending therethrough transversely with respect to the
longitudinal axis of the insulator. A socket contact is mounted in
each cavity. Each contact is formed with a mounting leg which is
adapted to be secured within a hole in a mounting board for
attachment of the strip thereto. Each contact has an open end
section adjacent to its opposite ends each defining an entrance
hole. The socket contact has a pair of spring members each
connected to an opposite one of the end sections. The spring
members extend in opposite directions along the other end section.
Due to this arrangement, a mating pin contact may be optionally
inserted into either entrance hole at the opposite ends of the
socket contact. No matter into which entrance hole a pin contact is
inserted, there will always result the same electrical values, such
as contact resistance, capacitance, or inductance. This arrangement
also allows versatile mounting of pin contact strips or other
printed circuit components with respect to the connector strip of
the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of one form of the socket contact of
the present invention;
FIG. 2 is a top plan view of another form of the socket contact of
the present invention;
FIG. 3 is an exploded fragmentary perspective view of the bottom
part and cover strip of the connector strip of the present
invention shown before being assembled together;
FIG. 4 is a fragmentary perspective view of the connector strip of
the present invention fully assembled with contacts mounted
therein;
FIG. 5 shows the connector strip of the present invention mounted
on a printed circuit board with various forms of connector pins and
electronic circuit components which are capable of being inserted
into the connector strip, in perspective representation; and
FIG. 6 shows the connector strip of the present invention mounted
on a printed circuit board in a different orientation than that
illustrated in FIG. 5 with various forms of pin connector strips
and electronic components which are capable of being inserted
thereinto, in perspective representation.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to FIG. 1 in detail, there is illustrated one form of
the socket contact of the present invention, generally designated
1. The contact is punched out from sheet metal in one piece, and is
completed after having been subjected to necessary stamping and
bending processes, which are well known to those skilled in the
art. The contact therefore is of one-piece unitary
construction.
The contact includes a pair of U-shaped end sections 2 each having
a pair of parallel legs 3 and a base 4. The bases 4 of the two end
sections 2 are joined by a longitudinal bridge member 5. Each
U-shaped end section forms an entrance opening 6 at each end of the
socket contact. The longitudinal bridge member 5 extends beyond the
base 4 of each end section 2 and continues as a shank or leg 7
which, as illustrated in FIG. 1, is bent at a right angle with
respect to the bridge member 5. The leg terminates in a reduced
cross-sectional mounting section 8 which is adapted to be mounted
within a hole in a printed circuit board.
The socket contact is provided with a pair of spring members 9.
Each spring member has a base which is integrally joined to a leg 3
on opposite end sections 2 and on opposite sides of the bridge
member 5. The spring members therefore extend in opposite
directions, yet face one another. The spring members are inclined
inwardly toward the longitudinal axis of the bridge member 5. The
end portions 11 of the spring members are reversely bent back in an
outward direction. The end surfaces 10 of the spring members are
normally positioned so as to be spaced from the plane in which the
outer surface of its respective mounting end section leg 3 is
disposed so that the spring members are free to spread upon
insertion of a pin contact member into the socket contact.
It is seen that the spring members extend along opposite
longitudinal sides of the bridge member 5 and are generally normal
thereto, thereby defining the contact receptacle 12 of the socket
contact. Thus, the U-shaped parts 2 at opposite ends of the contact
member 1 define open end sections either one of which may receive a
mating pin contact which will frictionally engage the spring
members 9 when inserted into the receptacle 12.
The socket contact illustrated in FIG. 2 is identical to that
illustrated in FIG. 1 except that the shank or leg portions 7, 8
lie in the same plane as the bridge member 5.
Reference is now made to FIG. 4 which illustrates the connector
strip of the present invention, generally designated 13. The
connector strip comprises an insulator 16 and the socket contacts
1. As best in FIG. 3, the insulator consists of a bottom part 14
and a cover strip 15. These halves are made from a plastic material
in separate molds. The top side of the bottom part 14 is formed
with a plurality of indents 17 which extend transversely in
relation to the longitudinal axis of the strip and parallel to each
other. The indents extend over the entire width of the bottom part,
dividing the upper surface into support surfaces 18 for the socket
contacts 1. Moreover, small upstanding posts 19 are arranged in the
four corners of each support surface 18. The two longitudinal sides
20 of the bottom part 14 are provided with vertically extending
grooves 21 each terminating between two posts 19 and thus in
alignment with a corresponding contact support surface 18.
The cover strip 15 has a plurality of parallel longitudinally
spaced recesses 23 therein which define separating partition walls
22. The three wall surfaces of each recess 23 are closed on the
face sides 20 of the strip by a three-sided frame 25 provided with
insertion bevels 24 forming a closed entryway. Each closed entryway
leaves space adequate for insertion of a mating pin contact,
without engaging the U-shaped sections 2 at opposite ends of the
socket contact. A plurality of slots 26 are arranged in parallel
spaced relationship along the top surface of the cover strip 15.
Each slot has a wedge shaped design at its bottom. The slots are
located centrally over each recess 23.
When assembling the connector strip 13, the socket contacts 1,
which are provided with, for example, the angled legs 7, are placed
on the support surfaces 18 with the legs extending into the grooves
21, thus restricting axial play of the socket contacts.
Subsequently thereto, the cover strip 15 is placed over the bottom
part 14. The lower ends of the frames 25 will then rest on the
upper ends of the posts 19 while at the same time the somewhat
longer partition walls 22 extend into the indents 17 in the bottom
part 14. The insulator 16 assembled in this way thereby provides a
plurality of spaced transversely extending contact cavities each
containing a socket contact 1. The two parts 14 and 15 may be
joined to form one unit by subjecting the parts thereof to gluing
or ultrasonic welding.
The slots 26 formed on the cover strip 15 represent a nominal
breaking point weakening the cross section of the insulator 16. The
bottom part 14 of the insulator is provided with a hollow space
below each support surface 18 in the shape of a pocket 27 which
opens at the lower surface of the bottom part as seen in FIG. 4.
The insulator 16 of the connector strip is normally manufactured in
excessive lengths. It can be divided into shorter connector strips
by breaking off the required lengths of the point of the slots 26
and pockets 27, which reduce the cross section of the inset
allowing it to be easily broken.
Mounting arrangements for the versatile connector strip of the
present invention are illustrated in FIGS. 5 and 6. However, first
referring to FIG. 4, it is seen that the reduced cross section end
8 of a leg 7 may be bent at a right angle with respect to a
longitudinal side 20 of the insulator strip, as shown in phantom
lines. With one leg of each socket contact so bent, it is possible
to fix the connector strip 13 on a printed circuit board 28 so that
the socket contacts 1 will assume a perpendicular position in
relation to the board. Such an arrangement is illustrated in FIG.
5. In this arrangement one longitudinal side 20 of the insulator
constitutes a mounting plane, and the ends 8 of legs 7 on that side
extend through the plane, and project into aligned holes (not
shown) in the board 28. The other row of legs 7 may then be
separated from the other ends of the contacts. This mounting
arrangement allows another PC board 30 provided with a
corresponding male contact strip 29 to be mounted at a right angle
in relation to the PC board 28 carrying the connector strip 13.
FIG. 5 also illustrates a strip of pin contacts 31 mounted on a PC
board 32 so that the pin contacts 31' are positioned at right
angles with respect to the boards. The board 32 may be arranged
parallel with the board 28 with the pin contacts 31' inserted into
the connector strip 13.
A plurality of holes 33 may be provided in the PC board 28 aligned
with the socket contacts 1 in the connector strip 13. By this
arrangement, it is possible to insert in the bottom side of the
connector strip 13 either one of the previously described PC boards
30 or 32, or to insert a test plug 33', for example, as illustrated
in FIG. 5.
In FIG. 6, both rows of legs 7 of the socket contacts 1 are shown
set into the grooves 21 of the sides of the insulator 16. The
reduced cross section ends 8 of the legs extend through holes 28'
provided in the PC board 28. The ends of the legs 8 may be soldered
to traces, not shown, on the board. Alternatively, the holes 28'
may be plated through holes and the leg ends 8 press fit into such
holes. In this mounting example of the connector strip 13, the
socket contacts assume a position which is parallel with respect to
the board 28. If, as already described hereinbefore, either the PC
board 30 provided with the male contact strip 29 or the test plug
33' is inserted into the connector strip 10, then these components,
just like the socket contacts 1, are in a mounting position which
is parallel with the board 28. When the PC board 32 carrying the
strip of pin contacts 31 is inserted into the connector strip 13,
the board 32 will be perpendicular to the PC board 28.
Thus, from the foregoing, it is seen that the connector strip of
the present invention permits a variety of mounting arrangements
for printed circuit boards and electronic components. In addition,
each of the halves 14 and 15 of the connector strip insulator may
be manufactured in a separte die-casting tool. In this way it is
possible to design the tool configuration in a more simple way,
without slides, thus considerably extending the service life of the
tools, and also considerably facilitating the mold release of the
die-cast parts. Also, because of the configuration of the socket
contacts, with the spring members extending in opposite directions,
mating pin contacts may be inserted into either side of the
contacts. The spring members are protectively arranged in the
inside of the socket member. Because the socket contact is of
symmetrical design, it is easily assembled in the lower part 14 of
the insulator strip since it may be optionally placed in either
direction on the supporting surfaces 18. Moreover, when subjecting
the socket contact to a galvanic treatment, the symmetrical
arrangement provides for good and uniformly distributed coating or
plating. It will also be appreciated that the socket contacts 1 may
be mounted in free standing relationship on a printed circuit
board, without the insulator 16.
* * * * *