Junevzs, 1943.
M. LlTWlN ETAL
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2,322,947
PIN AND SOCKET CONNECTION
Filed May 7, 1942 I
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2,322,947
Patented June 29, 1943
UNITED "STATES
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2,322,547,
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PrN AND SOCKET CONNECTION"
Max Litwin and Bertram Masts; Cincinnati; and ‘ 7
Joseph Ellert,‘ St. Bernard; Ohio, assignors to,
Litwin-& Sons, Cincinnati, Ohio, alfpa‘rtnei'shipw
composed of'Akini LitwinpJacohLit'wifn; Boris
Litwin, and Max Litwin
Application May 7, isizfserial Isa/442,06!
2 Claims. (Cl.V"2‘87_i"-‘—‘126)‘
socket in-which‘the- pin maybe inserted smoothly
andevenly without; canting of“v the pinand re
This invention relates to a pin and socket con
nection as part of‘ aplug assembly in an‘ elec
trical wiring system and more particularly to
the socket utilized in such a connection.
sultant» arcing ‘ of I‘ the rcurrent.
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be apparent from, the further and more detailed
description ‘of the inventionwhen considered in
conjunction with the drawing in which:
invention is particularly concerned with a socket
in which a pin may be quickly‘ and easily. in
serted but when positionedin the socketwill be
securely held: so; positioned and willv at the same
.1 Figure _1‘ is~a~perspectiye view‘ of‘ a pin ‘and
socket‘ connection-of'the type of the invention
time provide a‘ maximum of contact area vfor
the transmission‘of electricaljcurrento "
‘
. _ Qther andfurther objects and'advantages will
The
10
In the past it has been usual to providea
with the pin fully positioned in the socket.
'
"Figure: 2 is a side elevation of the respective
socket which ‘is slightly more oversized with re
spect‘ to‘ the pin’ than is absolutely necessary.
elements disengaged mm 0116 anethér andyith
the seekstehqwe Resection to illustrate the‘ ar
The advantage of this is to permit the insertion
easement.ottherparts-r
of the pin into the socket quickly with the exer
cise of a minimum amount of care. In such an
oversized socket one or more contact points have
usually been provided at or near the neck or
open end of the socket so that the contact will
be established and the circuit completed as soon o
as the pin is inserted into the socket to any
‘
Figure 3 is a similar view showing the pin par
tially inserted into the socketbut engaged by
one contact point only. The socket illustrated
in this ?gure is of slightly different interior con
struction from the one illustrated in Figure 2.
Figure 4 is a similar view showing the pin
almost fully inserted and being securely held
In this type of construction when the pin has
been fully inserted in the socket it is usually in
against the inner surface of the socket by the
tangs.
Figure 5 is a sectional view along the line
continuous contact at only one point or area,
5—5, Figure 4.
appreciable distance.
that is, immediately adjacent to the neck of
'
Considering now a further and more particular
the socket. This tends to provide a more or less
loose point connection and one in which the cir
description of the invention the various parts
vided. In this arrangement the contact depends
essentially upon the canting of the pin in the
generally at 2. The socket is indicated generally
at 3 and its corresponding‘lead wire at 4.
and elements are best illustrated in Figure 2.
In this ?gure the pin is indicated at I and the
, cult is apt to be broken should anything unusual
develop to‘ affect the limited contact area pro 30 lead Wire to which it is connected is indicated
socket.
With the correction of this general problem in
mind, one of the objects of the present inven—
tion has been to provide a socket in which the
pin is. securely positioned at all times against _
an entire inner side surface of the socket whereby
a large and continuous contact area is provided.
Another object of the invention has been to 40
provide a socket of the type described in which
a plurality of resilient tangs is struck from the
Resilient tangs 5-—5 struck from the outer cas
ing of the socket are bent inwardly to form con
tact points 6—6 which are adapted to engage
the surface of the pin l and force it downwardly
against the opposed inner surface I of the socket
3 as best illustrated in Figure 4. When the pin
has been inserted to the depth indicated in this
?gure, it is apparent that it will be very securely
positioned and that the contact will be over what
is comparatively a very large area, that is, along
a line extending the entire length of the pin as
qouter surface of the socket and bent inwardly
well as at the tangs on the other side of the
with their free ends at all times engaging the
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outer surface of the pin to urge it and maintain 45 socket.
As illustrated in the preferred example de
it in contact engagement with the socket proper
scribed, the mouth 8 of the socket may be very
as well as with extended projections thereon.
decidedly oversized with respect to the pin with
Another object has been the ‘provision of a
out affecting particularly the tightness of the
socket in which at least two inwardly directed
?t
or the amount of contact area maintained.
50
contact points are spaced a substantial distance
It isv preferable that the contact points 6-6
from one another and adapted to hold the pin.
be spaced apart a substantial distance lineally
against an opposed inner side surface of the
socket in such a way that it will not cant or
and some distance laterally as in this way there
is no tendency of the pin to rock in the case and
wobble.
Another object has been the provision of a 55 the large contact area is thereby maintained.
2,322,947‘
In applicants’ preferred structure, as illustrated,
the contact point 6 on the foremost tang 5 holds
the pin I against the inner surface of the front
part of the socket while the contact point on the
rear tang holds the pin against the inner rear
surface of the socket. In this way the pin is
maintained in substantially parallel relation
ship to the inner surface of the receptacle along
the entire length of the pin and the canting or
socket by the tang which terminates in the sec
and point. This guiding action occurs smoothly
and evenly and with no danger of arcing caused
by the canting of the pin in the socket.
It will be apparent that in describing our in;
vention we have described only a preferred em
bodiment and that it may be possible to make
changes in, additions to, or rearrangements of
the parts without avoiding the substance of the
rocking characteristic of sockets having but'a 10 invention as set out in the ensuing claims.
single contact point is completely vavoided.
Having described our invention, we claim:
A particular advantage of the invention is that
as illustrated in the preferred form the ‘tangs
may be formed from the outer surface of the
casing of the receptacle. This obviates the
necessity for providing a contact 'point or points
as separate elements in the interior of the socket
and greatly simpli?es and cheapens the mass
production of the structure. Likewise there are
advantages in striking the tangs from the sur
face of the socket directly adjacent‘ one another
but with the inwardly extended contact points
oppositely disposed. Providing the tangs ad
J'acent one another avoids weakening of the sur
face of the socket at more than one point while
disposing the inwardly extended contact points
"a substantial distance apart provides a fork
which holds the pin very tightly against the in
ner surface of the socket opposite to the one
from which the tangs are, struck.
'
A consideration of Figures 3 and 4 indicates
clearly how in the preferred embodiment of our
invention the pin ?rst encounters one contact
point and is then guided into the interior of the
1. In combination a pin and a socket, the
socket including a pair of inwardly bent re
silient tangs formed from the outer surface
thereof; said tangs being adjacent one another
on the surface of the socket but being bent in
wardly at opposed ends whereby the inwardly
extending points of the tangs will be spaced
apart the length of the tangs; said inwardly ex
tending points being substantially equidistant
from the inner surface of the socket.
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2. A socket for a pin comprising a tubular
member having a plurality of inwardly bent re
silient tangs formed from the wall thereof, the
said tangs being adjacent one another but being
oppositely arranged whereby inwardly extend
ing surfaces on adjacent tangs are spaced apart
a distance corresponding to the length of the
tangs, the said inwardly extending surfaces being
substantially equidistant from the inner surface
of the said tubular member.
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MAX LITWIN.
BERTRAM MILNER. "
JOSEPH ELLERT.