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Патент USA US3099520

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July 30, 1963
Filed April 25, 1960
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United States Patent 0
Patented July 30, 1963
FIG. 1 is a plan view showing the socket contact of my
Heinz Piorunueck, South Norwalk, C0nn., assiguor to
Gom Electric Company, Inc., Stamford, Conn., a cor
poration of Connecticut
Filed Apr. 25, 1960, Ser. No. 24,337
2 Claims. (Cl. 339-256)
1FIG. .2 is a section along line ‘2-2 of FIG. 1;
‘FIG. 3 is a section taken along line 3-3 of FIG. 2;
FIG. 4 is an end view of the left hand end of the con
tact of FIGS. 1 and 2;
FIG. 5 is an end view of FIGS. 1 and 2 taken from the
right end prior to the shaping of the detent bar of the
This invention relates to a contact of the type utilized
FIG. 6 is a section similar to FIG. 2, but showing the
in miniature connectors. In such connectors, it is quite 10
common to mount in a plastic body a large number of
shaping of the detent bar;
FIG. 7 is an end view similar to FIG. 5 taken after the
small contacts, each adapted to engage a series of opposed
shaping of the detent bar.
contacts, all as those skilled in the art will readily ap
Referring now more particularly to (the drawings,
preciate. My invention relates particularly to a socket
type of contact having means that yieldingly resist the 15 reference numeral 10 indicates ‘a contact of the type used
in the art but incorporating the contributions of my inven
entrance of a pin contact and the removal of the pin con
tion. This contact is approximately 1%" in length and
tact. The socket contact of my invention is also required
its greatest overall diameter is less than 1A0". A woven
to present rather considerable resistance to distortion as
electric wire is adapted to be inserted, and generally
when weight is applied to the pin contact after it has
been placed within the socket. This weight operates 20 soldered in the bore .11 formed at one end of the contact,
the other end of the contact having a bore or socket 12
transversely relatively to the direction of insertion of the
into which a pin contact is adapted to be inserted. Usual
pin into the socket, and simulates the type of strain that
ly there are a considerable number of socket contacts of
may be applied.
this type mounted within a small plastic body, all as those
Not only is it necessary in contacts of this type to
present resistance to the removal of a pin from the socket 25 skill-ed in the art will fully appreciate.
The right hand end of the contact 10 is maintained in
contact, but it is further required that electrical contact
the form of a solid continuous ring 13‘ having a cam sur
be made through means other than that part of the mecha
‘face 14-‘ for aiding the entry of the pin contact. This solid
nism that presents this resistance to the removal of the
and continuous ring 13 is also adapted to resist distortion
I have conceived a socket construction for a contact 30 of the contact as when a force is applied to the socket
contact through an inserted pin contact in the direction
that is novel, and is eifective to contribute the several
of the arrow 15 in FIG. 2. I have found that the solid
features that are required. Thus, my socket contact
ring is very effective. It is emphasized that the solid ring
presents a solid ring that resists distortion through trans
is made possible only because I obtain my detent mecha
verse application of force on a pin within the socket. In
addition, my new contact socket presents resistance to the 35 nism in a novel manner as set forth below.
In order to form the detent bar to which I have already
removal and insertion of a pin into the socket, while simul
alluded, I slot the cylindrical surface of the bore 12 at
taneously eifecting electrical contact between the pin
16 and 17, the slots \16 and '17 de?ning therebetween a
and the socket through a solid surface, that is undistorted
solid bar 18. The section of the bar 18‘ is well shown in
or worked in any manner.
As a feature of my invention, I form a cylindrical socket 40 FIG. 2. In FIG. 5 the spacing of the two slots 16 and
17 is well illustrated as is also the bar 18.
having a ‘solid complete ring at that end into which a pin
In order to shape the bar 18 so that it may perform its
contact enters the socket. My new socket contact diur
function properly, I ‘apply impact to ‘one end thereof, as
ther provides an integral bar that presents yielding detent
at the point 19, thereby bending the bar 18 as is fully
means for resisting movement of a pin into the socket
and out of the socket ‘with the main portion of the socket 45 illustrated in ‘FIG. 6. This bending of the bar 18 is also
well illustrated in FIG. 7 where the numeral 19 again
undisturbed and fully e?ective to maintain true and ef
shows the maximum bend. It will be noted that the curve
fective contact between the pin and the socket.
of greatest bending is near one end of the bar 18 because
As a still further feature of my invention, the bar that
of the application of the bending force. The bar will not
presents the resistance to the entry and removal of the
pin from the socket is readily ‘formed through ‘a simple
slotting of the socket in spaced relation to the complete
ring at one end of the socket. Further, as part of the
concept of my invention, this bar is so shaped by a simple
application of sudden force as to ‘form a non-setting detent
that will present yielding resistance to the entry and re
moval of a pin relatively to the socket.
I have thus outlined rather broadly the more important
features of my invention in order that the detailed descrip
tion thereof that follows may be better understood, and
in order that my contribution to the art may be better
appreciated. There are, of course, additional features of
my invention that will be described hereinafter and which
will ‘form the subject of the claims appended hereto.
Those skilled in the art will appreciate that the conception
on which my disclosure is based may readily be utilized
as a basis for the designing of other structures for carrying
out the several purposes of my invention. It is important,
therefore, that the claims be regarded as including such
equivalent constructions as do not depart from the spirit
and scope of my invention, in order to prevent the appro
priation of my invention by those skilled in the art.
Referring now to the drawings,
bend symmetrically but rather will bend assymmetrically.
Because of the forming of the curve or bend in the bar
as shown, the bar will not take a permanent “set” as
readily as when it is bent symmetrically. This was deter
mined by taking a group of contacts made exactly alike,
55 and bending some of the bars 18 of the contacts sym
metrically and some asymmetrically. Then, by inserting
pins of the exact same size and material into the socket
bore 12, it was found that the contacts with the asym
metrical bars were far superior to those with symmetrical
60 bars. This is a most valuable feature of my invention
since the ‘forming of a bend centrally of the bar leads to
setting of the bar and a considerable lessening of the
effectiveness of my invention.
It will also be quite well seen both from sections of
65 FIGS. 6 and 7 that the bar \18- occupies relatively little
room :on the circumference of the bore of socket bore 12,
and that therefore there will be considerable surface with
in the socket bore 12 for maintaining solid contact be
tween a pin contact and contact 10 as the pin contact
70 moves. In other words, electrical contact may be es
tablished over a relatively larger area rather than through
the relatively narrow bar 18.
I believe that those skilled in the art will now fully
appreciate the importance of my invention.
I new claim:
1. An integral solid metal socket contact having a
complete‘ integral solid ring- 'de?ningthat end‘ thereof into
which -a pin contact enters ‘a cylindrical ‘bore’ of said
socket contact, the other ‘end ‘of said. bore‘ terminating in
a1 completely‘ solid cylindrical metal structure, a pair of
relatively'long". slots'formed in the outer solid wall of said
contact de?ning said ‘bore, {and extending through said
ring de?ning the outer end thereof and through which a
pin contact enters the cylindrical bore of said socket, a
pair of relatively long slots formed closely to one an
other in the outer solid wall of said sleeve-like portion
and extending through said Wall to said cylindrical bore
so as to leave a narrow ‘bar-like [piece of metal ‘as a part
of the surface of said lbore integral at each end with the
surface of the bore and adapted to be contacted by a pin
contact entering said bore, and‘ said bar'lbeing deformed
asymmetrically of its length inwardly of said lbore to
wallito. s‘aid cylindricalflhor‘e so as towleave'a bar-like piece
present yielding resistance to the‘ sliding of said pin into
of metal as apart of the surface of said bore integral ‘at
vand out of said ibore more effectively than were the same
its ends with the metal forming said socket contact and
'bar bent symmetrically of its length.
adapted to‘ be contacted by a pin contact entering said
bore, and said bar being deformed inwardly of said bore 15
References Cited in the ?le of this patent
adjacent one end thereof, said deformation being such
as to ‘present a non-symmetrical conformation that 'will
not take a set as readily as were‘ the" said bar to be bent
Litwin et a1. _.__~ _____ __-_'_ June \29, 1943
symmetrically while yieldingly resisting more effectively
Litwinet val ____________ __ Aug. 3, 1943
Uline ________________ __ Aug. 7, 1951
Beaver ______________ __ June 21, 1955
France ______________ __ Feb‘. 2.9, 1960
Great Britain ________ __ ‘Oct. 16‘, 1930
Switzerland __________ __ Apr. 16, 1930
thanwwere said bar bent symmetrically, the entry' and‘ re 20
moval of a pin‘ from said‘ socket.
2. An‘: integral solid metal socket contact‘ having a
central solid portion, a bored‘. integral sleevealike portion
extending fromE each side of said central solid portion,
one of said sleevealikeeportions formingthe socket ofsaid 25
socket contact and terminatingfin' acomplete solid integral
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