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Патент USA US2108916

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Feb. 22, 1938.
2,108,916
H. w. CHAPLIN
CONNECTER PLUG
Filed Aug. 7, 1934
30
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Inventor ‘
h’. 14/; a’?a/b/lk
@250” 19 ‘hAttorney
2,108,916
Patented Feb. 22, 1938
UNITED‘ STATES
PATENT OFFICE
2,108,916
CONNEC'I'EB PLUG
Hershel Wayne Chaplin, Morgantown, W. Vadas
i
signor of one-fourth to S. A. Phillips, and ii!
teen percent to Richard Earle Davis, both of
Morgantown. W. Va.
Application August 7, 1934, ‘Serial No. 738,862
‘
SClaims. (Ci. 173—343)
My invention relates generally to electrical pressed below the floor of the recess 13' as shown
in Figure 2. A bushing 29 has its upper'end
cable or cord connectors, and particularly to con
abutting the lower end of the insulatorlcup i9
necters of the plug type, 'and an important ob
ject of the invention is to provide a plug connecter and has its lower end arranged ?ush with the
5 of the type indicated wherein the receptacle por-. lower end of the body 8 and engaging the upper
tion and the plug portion can be more easily and
surface'of a dielectric plate 2|.
quickly separated, notwithstanding the fact’ that
ductor, 22 passes through the lower end of the
insulator cup 59, through the bushing 20 and
through the head 23 on the plate 2!; and the
pin is riveted within the‘ insulator cup l9 and
against the lower side of the head on the plate
2|. The riveted portion of- the pin within the
they are in adequately connected condition in
ordinary circumstances.
’
Another important object of my invention is
to provide a simpli?ed and ei?cient plug con
necter of the character indicated above which is
capable of being made at low cost.
‘Other objects and advantages of my invention
15 will be apparent from a reading of the following
description in connection with the drawing
wherein for purposes of illustration I have shown
a preferred embodiment of my invention.
In the drawing:
Figure 1 is a side elevational view of the con-V
20
10
necter plug.
.
Figure 2 is a transverse vertical sectional view
through Figure 1.
Figure 3 is a side elevational view of the plug
25
portion.
Figure 4 is a bottom plan view of the releas
ing collar on the plug portion.
Referring in detail to the drawing, the nu
meral 5 refers generally to the plug connecter
30 which is composed of the female receptacle por
tion 6 and the male plug portion l.
The female receptacle portion 6 is formed of
a generally cylindrical dielectric body 8 which
has on its lower end a threaded ferrule 9 adapted
35 to be screwed into an outlet, such as a base out
let or socket receptacle and has on its upper
end a portion. ill of relatively greater diameter
whose upper part is beveled as indicated at H.
The upper part of the body 8. has therein a
frustro-conical recess l2 which opens into the top
of a cylindrical recess 53.
‘
In the cylindrical recess i3 is arranged an
annular contact member it which is slightly
smaller in diameter than the diameter of the re
45 cess i3 and has on its lower end the ?ange 85
which engages the top of a helical spring. 66 lying
on the bottom of the recess l3 in such a way as.
to normally force the contact member It up
wardly to engage its cupped upper part iii. A
50 conductor i8 connects the contact is with the
threaded ferrule or shell 9.
-
An inverted frustro-conical insulator cup 19 is
arranged concentrically spaced within the an
nular contact member M within the recess i3,
55 the insulator cup l9 having its lower end de
A riveted con
insulator cup it constitutes a contact to be en
gaged by a contact member on the plug portion
of the plug connecter, while the riveted portion
on the lower ’end of- the pin engaging the head
of the plate 2! forms the contact for engaging
the contact in the receptacle or socket to which
the plug connecter may be connected.
The plug portion ‘i comprises the dielectric
solid body 2'5 which is generally cylindrical in '
form and has a frustro-conical lower part 28 .
which is adapted to seat in the frustro-conicalj
recess it of the receptacle portion when the
plug portion and the receptacle portion are as
sembled as shown in Figure 2. The upper end
of the frustro-conical portion 26 is beveled as
indicated at 2'! to provide a surface for spread
ing latches to_ be described. At three equally
circumferentially spaced places the body 25 has 30
above the beveled portion 21 radially inwardly
extended notches 28 in each of which is arranged
in a chordal direction-a part of a pivot ring 29
on which is hinged a latch 30, the ring 29 en
circling the body 25.
Each latch comprises the long arm 3i provided
at its radially outward end with the right angular ‘
book 32 and hinged at its inward extremity on
the ring 29. On the upper side of the portion of
the arm 3! adjacent ‘the ring 29 but at a position 40
slightly radially outwardly thereof is the foot 33.
When the plug portion is connected to the re
ceptacle portion as shown in Figure 2, the lower
side of the latch 38 will rest upon the extreme
upper edge of the beveled portion 21 and on the , ,
beveled portion ll of the body 25, in which posi
tion the hook 32 engages under the lower edge
34 of the beveled portion ii on the receptacle
body 8.
-
'
Telescoped on and concentrically spaced from
the cylindrical upper part of the body 25 is the
releasing collar 35 which has 9. depending skirt
portion 36 which is provided at the three circum
ferentially spaced intervals with openings 31
through which the latches 30 are arranged as
2
.
2,108,316
helical spring 40 whose upper end is con?ned by
48 to enter the member IS in concentrically
spaced manner. A helical spring 49 is located
in an accommodating recess in the bushing 41
and works between the bottom of the recess in
the bushing 41 and a cross member 50 connected
to the pin 46 in such a way as to keep the pin
48 pressed downwardly to engage its contact
head 5| withthe upper contact of the conductive
pin 22 which is located within the member ID,
when the plug portion is connected with the re
ceptacle portion. A conductor 52 traverses the
a ?ange 4| on a cap 42, whereby the releasing
body 25 and has one end connected to the con
indicated in Figure 2 and in Figure 1. The por
tion of the skirt} above each opening 31 is in
teriorly rounded as indicated at 38 to cooperate
with the angulated outer end portion of the foot
33 and also the upper side of the long arm 3|.
of the respective latch on which the skirt rests
' in the assembled condition of the connecter.
The collar 35 has an interior ?ange 39 concen
trically spaced from the body 25 and against the
10 upper side of which works the lower end of _a
tact cylinder 53 and its remaining end connected
rection. The eilect of the downward position of to one or the wires 01' the cable or cord 43. The
15 the collar 35 is to push the skirt down on the contact member 53 surrounds and receives the 15
upper side of the latches '30 and thereby yield ’ bushing 4'! and is itself ?tted in the receiving
ably urge the latches in the contracting direction opening in the lower end of the body 25 and the ’
so as to clamp on the mentioned receptacle por
member 53 has "on its lower end and engaging
tion in such a way that the plug portion and re
the bottom of the body 25 the rounded annular
20 ceptacle portion will pull ‘apart if a relatively
contact ring 54 which is received in the cupped 20
strong pull is exerted on the cord or cable 43 formation H of the contact member l4 in the
while the receptacle portion 6 is held, which receptacle portion 6 as shown in Figure‘2, when
would otherwise break the cord or cable 43. the plug portion is connected to the receptacle.
However, in ordinary service, the latches 30 will The member l9 provides adequate segregation of
collar 35 is normally pressed in a downward di
25 securely hold the plug. portion and the receptacle
portion, together and they may be rotated rela
tive to each other‘while so connected.
It will be
observed that in the normal position of the parts
described the foot portion 33 of the latches is
3.0 above and slightly radially outward of the curved
portion 38 on the interior of the skirt of the re
leasing collar 35.
When the releasing collar35 is grasped and
moved in a direction to compress the spring 40
35 while the plug and receptacle portions are con
nected, the rounded part 38 of the skirt of the
releasing collar will ride against the outer end of
the foot 33 and spread the latches 30 and at the
same time the lower end of the skirt will be dis
40 engaged from the upper side of the long arm 3|
of the latches and permit the latches to spread
sufficiently to disengage from the receptacle por
tion. The movement of. the releasing collar in
the direction indicated will cause the rounded
45 part 38 to have a cam action on the foot 33 of
the latches which spreads the latches and un
hooks the hook portions 32 of the latches from
the receptacle portion, so that the plug portion
and the receptacle portion may be separated sim
50 ply by moving them in opposite‘ axial directions.
The plug portion 1 may be assembled or con
nected to the receptacle portion 6 simply by
roughly axially alining the plug portion and the
receptacle portion and pushing them together.
55 It will be noticed that as the latches 30 are en
' the various contacts.
_
Although I have shown and described herein a
preferred embodiment of my invention, it is to
be de?nitely understood that I do not desire to
limit the application of the invention thereto,
and any change or changes may be made in ma 30
terials, and in the structure and arrangement of
parts, within the spirit of the invention and the
scope of the subjoined claims.
What is claimed is:—
1. A plug connecter comprising two dielectric
separable bodies,. one of said bodies having an
annular retaining portion, latches pivoted on one
of said bodies and engageable with said annular
retaining portion, a sleeve mounted for longi
tudinal movement on said one body, said sleeve 40
being movable to an axial position to engage with I
a ?rst portion of said latches in a manner to
hold the latches engaged with said annular re
taining portion, said sleeve being movable to an
opposite axial position to engage with a second 45
portion of said latches in a manner to hold said
latches disengaged from said annular retaining
portion so as to enable separation of said bodies,‘
one of said bodies having a centralized stationary
contact and the remaininglbody having an axial 60
spring pressed contact engageable with said cen
tralized stationary contact, ?rst annular con—
tact means on said remaining body and sec
ond annular contact means on said one body
arranged to be’ in engaged positions while 55
gaged with and are spread by the beveled portion said bodies are connected together, and a di
H on the receptacle portion in the act of pushing electric tubular member spaced radially in
the plug portion into engagement with the re . wardly from the ?rst and second annular con
ceptacle portion, the frustro-conical part 26 of tact means and surrounding said spring contact
60 the plug portion advances into the receptacle
whereby said axial spring pressed contact is posi
portion ahead of the rest of the plug portion. tively prevented from becoming engaged with
This produces early engagement of the contact either of said annular contact means at any time.
5| of the rod 46 with the upper head of the con
-2. A plug connecter comprising two dielectric
tact 22.
separable bodies, one of said bodies having an
65
The cable or cord 43’ passes through the cap 42 annular retaining portion, latches pivoted on one
which is threaded on the upper end of the body of said bodies and engageable with said- annular
25 as indicated at 44, and the wires in the cable retaining portion, a sleeve mounted for longi
or cord 43 pass through accommodating open
tudinal movement on said one body, said sleeve
ings in the body 25, and one of the wires is con
being movable to an axial position to engage with
70 nected to an L-shaped connection 45 located in
a ?rst portion of said latches in a manner to hold 70
teriorly of the body 25 and having an opening the latches engaged with said annular retaining
through which slides an axially arranged contact portion, said sleeve being movable to an opposite
pin 46 which passes through the lower end of the axial position to engage with a second portion
body 25 and through a bushing 41 whose lower. of said latches in a manner to hold said latches
end is frustro-conical or tapered as indicated at disengaged from said annular retaining portion so 75
'75
3
2,108,916
tion of said latches in a manner to hold said
as to enable separation of said bodies, one of said
bodies having an axial spring pressed contact, a
latches disengaged from said annular retaining
body with which said spring pressed contact is
one of said bodies having an axial spring pressed
engageable, ?rst annular contact means on said
one body and second annular contact means on
remaining body with which said spring pressed
contact is engageable, ?rst annular contact
" centralized stationary contact on the remaining ' portion so as to enable separation of said bodies,
said remaining body arranged'to be in engaged
positions while said bodies are connected to
gether, and means spring pressing said second
10 annular contact means toward said ?rst annular
contact means.
3. A plug connector comprising two dielectric
separable bodies, one of said bodies having an
annular retaining portion, latches pivoted on one
15 of said bodies and engageable with said annular
retaining portion, a sleeve mounted for longitudi
nal movement on said one body, said sleeve being
movable to an axial position in engagement with
a first portion of said latches in a manner to hold
20 the latches engaged with said annular retaining
portion, said sleeve being’ movable to an opposite
axial position in engagement with a-second por
contact, a centralized stationary contact on the
means on said one body and second annular con
tact means on said remaining body arranged to
be in engaged positions while said bodies are con 10
nected together, means spring pressing said sec
ond annular contact means toward said ?rst. an
nular contact means, and a dielectric tubular
member surrounding and projecting axially from
said centralized stationary contact and spaced 15
radially inwardly from said ?rst‘ and second an
nular contact means whereby said axial spring
pressed contact is positively prevented from be
coming engaged with either of said ?rst and sec
ond annular contact means at any time.
nnasnm. WAYNE CHA‘PLIN.
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