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Патент USA US2119452

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May 31, 1938.
D. WOODHEAD
2,1 19,452
ELECTRIC CONNECTER
Filed Oct. 15-, 1934
GO
mm
5
‘7
4 I,
7
Y
Patented May 31, 1938
UNITE
2,119,452
STATES
PATENT caries
2,119,452
ELECTRIC CONNECTEB,
Daniel Woodhead, Barrington, Ill.
Application October 13, 1934, Serial No. ‘748,251
9 Claims. (Cl. 173-358)
This invention relates to electric connecters,
and particularly to electric sockets. '
This application is a continuation in part of
Numerous other objects and advantages will
be apparent throughout the progress of the fol
lowing speci?cation.
application Serial No. 601,462, ?led March 28,
The accompanying drawing illustrates a se->
5 1932.
views
lected
therein
embodiment
are as follows:
of the invention and the
Soft rubber sockets and other electrical con—'
necters are desirable because of their insulating
Fig. 1 is a detail sectional view of the im
capabilities, and are furthermore desirable in
proved socket and embodying the invention.
asmuch as they are practically unbreakable, be
Fig. 2 is a detail sectional View similar to Fig. 1,
10 ing capable of sustaining hard usage without
breakage or wear. It has been a problem of the
past to provide some means for making a water
proof connection between the ?exible irubber
casing and the light globe. Various attempts to
15‘ accomplish thisrdesirable result have failed. It
has often been proposed to a?ix thin separate
soft rubber sleeves to the inside of the casing
in some manner so that these lips would en
gage the light globe. After a period of time,
20 however, the heat from the light globe will
cause the thin soft rubber to vulcanize or be
come set to the shape of the lamp globe and
no longer tightly hug the lamp globe, thereby
damaging any water-proof capabilities the cas
25 ing formerly had. The present invention over
comes these disadvantages and attains all the
advantages .of a soft rubber casing, its primary
object being the provision of a new and soft
30
35
40
45
50
rubber socket for lamp connections in which
there is arranged a means for engaging the lamp
globe with a waterproof type of joint, at the same
time providing means in cooperation therewith
to maintain the effective water-proof seal, de
spite the vulcanizing action of the heat in the
lamp globe when the same is turned on, there
by preventing water and moisture from getting
into the interior of the casing to the electrical
connections.
A further object of the invention is' to provide
a soft rubber socket casing which has a metal
shell imbedded therein for threadedly receiving
an electric lamp globe, and which has means
integrally connected therewith or formed there
in, whereby a ?exible gasket element may engage
a part of the lamp globe when the same is
screwed into the shell, making ‘a water~tight con
nection between the casing and the lamp to pre
vent water from entering the casing and getting
to the electric connections.
A still further object is to provide a soft
?exible rubber casing which has a ring formed or'
imbedded therein near its outer or open-end to
prevent the casing from spreading by heat radi-'
ating from the globe, the‘said device being ex
55 tremely economical to manufacture. '
showing a lamp globe operatively arranged there- T09
in.
'
Fig. 3 is a detail bottom plan View of the cas
ing looking in the direction of the arrows 3-3
of Fig. 1.
Fig. 4 is a detail sectional view showing the 15:1
rubber washer or gasket operatively engaging a
light globe.
I
Fig. 5 is a detail perspective view of the grooved
metal member.
washer
Fig. 6 or
is agasket
detailwhich
perspective
is received
view of
in the
the rubber
metal
member shown in Fig. 5.
Fig. '7 is a detail sectional view of a modi?ed
form of socket.
'
-
Figure 8 is a partial cross-sectional view of an- 285.?
other preferred embodiment of the present in
vention.
Figure 9 is a partial cross-sectional view of
the embodiment shown in Figure 8, showing that
embodiment in operative engagement with‘ thesis?
light bulb.
'
'
The connecter herein shown comprises a body
or‘ casing ‘I which is preferably made of soft
?exible resilient material such as rubber, hav
ing conductors 8 and 9 imbedded therein. Up- 357-:
standing protuberances H) are formed on the
casing l and engage the conductors for forming
a water and moisture proof joint or connection
between the casing and the conductors.
The
body or casing ‘I is provided with a recess or 40*
chamber ll into which a shell i2 having threads
I3 is operatively arranged. The shell I2 is pref
erably imbedded in the casing during its manu
facture, and makes electrical contact with the
manner.
conductors 8 and 9 in the usual conventional
One preferred form of the invention is shown
in Fig. 2. An annular grooved metal ring [4 is
arranged at the lower end of the casing l and
below the lower end E5 of the shell 12. This 5b?
annular member '14 is preferably molded in posi
tion during the construction of the casing, being
arranged in the mold and having the rubber
molded thereabout. The ring [4 has an annular
groove l6 formed therein, which groove is greater 55??
2,119,452
than a semi-circle in cross section so as to receive
and retain the annular ?exible washer or gasket
H. The washer or gasket I‘! may be made of
any kind of ?exible material desired, but in actual
practice it has been found that a continuous
member made of rubber satisfactorily performs
the function intended in that it is instantly re
placeable and exceedingly cheap to manufacture.
The rubber washer I1 is maintained in posi
tion in the groove by the natural resilient char
acteristics of the rubber washer, which causes it
v10
. to ?t or snap in position in the annular groove
provided in the metal retaining ring M. The
metal retaining ring l4 prevents the washer I‘!
15 from spreading when a lamp‘ I8 is screwed into
the socket, and thereby causes a pressure to be
exerted against the rubber member [1’, forming
a tight seal against the lamp I8 as indicated at
H) in Fig. 4.
20
25.
V
A soft rubber casing is desirable in that it
stands they wear and abuse, while the metal mem
ber imbedded therein prevents the rubber from
expanding at the lower end of the casing. The
metal member is grooved in such a manner as
to receive and retain an annular rubber washer.
The annular rubberv washer?ts or snaps into
place ‘in the groove and is held therein by the
natural expansible characteristics of the rubber
washer. This washer projects inwardly from the
inner peripheral edge 20 of the casingand is en
" gaged by a lamp which causes the washer to be
squeezed tightly between the metal ring l6 and
theiouter periphery of the lamp globe, making
a tight water-proof connection between the lamp
and thecasing, thereby making the device mois
preferable. Another way of making the assem
bly is by providing an annular grove 2|, Fig. 4,
in the casing and then 'imbedding the metal ring
M in position in the casing. As the casing is
made of soft ?exible material and stretchable
within reasonable limits, the metal ring I4 can
be easily placed ‘in the groove 2| and held in
position therein due to the normal resilient char
acteristics of the rubber casings After the ring
I4 is arranged in position in the socket groove
2|, the washer I‘! may be inserted in position
in'the same manner as previously described, pro
ducing the same result inasmuchas all pressure
is limited between the lamp and the ring, where
by the employment of the washer will not act to 15
loosen the ring from its groove 2| in the casing.
In the modi?cation shown in Fig. 7, the thread
ed shell l2 is provided with, a lower extension
3|] formed with an expanded annular ring 3|
providing an inner groove 32. .The inner groove 20
32 is adapted to receive the rubber washer or
gasket |‘|. Thus,rwhen the light globe is screwed
in position in the socket, the globe will squeeze
the rubber, as indicated in Fig. 4, making a
water-tight connection between the globe and the 2.5
casing to. prevent water and moisture from get
ting inside the casing to the electrical connec
tions. .The construction disclosed in Fig. '7 may
be preferable'to the other types. previously de
scribed in that the entiresocket, including the
metal shell member 3|, may be formedin; one
piece, the shell being set in the mold and the
soft rubber casing 'l molded thereabout. This
construction has all the advantages of the con
struction previously described whether it be the 35'
ture-proof and water-proof, preventing rain and
ring l4 imbedded in the rubber casing or an in
moisture from working up into the electrical con
nections and causing a short-circuit.
The invention may be made without the em
a non-expansible metal ring is provided.
40. ployment of the metal retaining ring M.
This
‘ " may be accomplished by forming the rubber cas~
ing 1 with su?icient length 42 below the opera
tive end of the shell l2 to engage aportion of
the lamp globe 43 below the threaded male end
In such case, it isdesirable to relieve
45 ‘athereof.
portion 44 of the rubber casing on the inside
of the opening, so that there is a space 45 be
dependent ring receivable in the groove 2|, as
The
ring 3| is preferably made greater than a semi
circle in cross section so as to hold the gasket
|'| securely in position. However, the ring need
as the natural expansible characteristics of the
rubber will cause the gasket to seat itself in the
groove.
,
"
'
i
It is to be noted, however, that whether a re
lieved contacting lip structure is used or the
tween the casing and, the lamp in the zone where washer and retaining ring structure is used, the
the metal retaining ring l4 liesin the previously contacting edge of either the lip or the. rubber
described embodiment. The lower end 31 shown washer must be substantially inward of the side
wall of the brass shell' in the casing. . This is
in Fig. 4 of the rubber casing would then be ex
tended inwardly, so that the rubber opening at ' shown in Fig. 4. The line parallelwith the edge
of the casing is shown at 39. The line of the con
the lower end of the casing is substantially small
er than the lamp globeJ When the lamp globe tacting edge of the rubber washer or relieved.
lip structure, Whichever may be employed, is
55 is inserted therein, this inwardly curving sec
tion of the casing will engage the lamp globe shown at 4|. It will be seen that the line 4| lies
and make a water-tight and moisture-proof joint substantially inside of the line 39. Thisrneans
therewith. Ordinarily, the heat from the lamp that the inner diameter of the rubber washer or
globe would vulcanize and render ineffective such the inner diameter of the bottom opening of the
rubber casing, if the relieved lip structure be used.
60. a resilient contact. However, in the present in
vention,rsu?icient rubber is embodied‘in this area is of substantially smaller dimension than‘the
of the device so that its springiness is not lost innerdiameter of'the brass shell l2.
through heat, ‘but only theportion right at the
juncture of the casing with thev globe will be
65 aifected by heat, the balance being capable of
maintaining the resilient contact.
.
The invention not only makes a tight connec
tion between the lamp and the socket, but also
prevents the lamp from backing out of the socket,
70 .should the same ever be jarred or shaken.’
Of course, it is to be understood that in the
first described embodiment, the grooved metal
ring .14 need not be formed or imbedded into the
49;
not be greater than a semi-circle in cross section ,
The invention provides a’ simple and efficient
water-proof socket which positively prevents all
moisture or water from getting into the electrical
connections and causing a short-circuit. The
4.5..
59
65.
rigid'collar is preferably imbedded into the rub—
ber casing during its manufacture, and the rub
ber gasket is impinged between the body of the
casing and the lamp when the lamp is screwed '70.
into the sockets During the screwing operation.
'offthe lamp into the socket, the rubber gasket
isyimpinged and distorted to conform withthe
peripheral contour of the lamp‘ causing this
rubber casing during its construction, although at
75. the present time thislatter method ‘is deemed ‘washer to be impinged between the lamp and‘
3
2,119,452
the ring, positively making a water-tight con
nection. When the washer becomes disintegrated
semi-circle in cross section, and a ?exible mem
by the heat of the lamp, another one may be
ber carried by the metal member and adapted to
be distorted when a lamp globe is screwed into
position in the casing to provide a water-tight
connection between the casing and the lamp.
6. An electric connecter comprising a soft ?ex
ible rubber casing, a screw threaded shell imbed
instantly inserted in position without much trou~
ble and at an exceedingly low cost.
Changes may be made in the form, construc
tion, and arrangement of the parts without de
parting from the spirit of the invention or sac
ri?cing any of the advantages thereof, and the
10 right is hereby reserved to make all such changes
as fairly fall within the scope of the following
claims.
What is claimed as new and desired to be se
cured by Letters Patent is:
15
the casing, said member being greater than a
1. An electric connecter comprising a soft flex
ible rubber-like casing, a socket in the casing and
ded in said casing, said casing having its lower
end formed with an inner annular groove, said 10
groove being greater than a semi-circle in cross '
section, and a ?exible rubber ring receivable in
said groove and maintained therein by the ex
pansible characteristics of the rubber ring, said
rubber ring being squeezed between the body of 15
the casing at the groove and a lamp when a lamp
an annular metal member arranged in said cas
is screwed in position in the shell.
ing forwardly of the forward end of the socket to
7. An electric connecter comprising a soft ?ex
ible rubber-like casing, an annular rigid member
imbedded in the rubber casing and having a 20
prevent same from spreading, and a rubber gas
'
.
ket supported in the metal member.
2. An electric connecter comprising a soft ?ex groove therein, and an annularr?exible gasket»
ible rubber-like casing, an annular metal member removably arranged in the groove.
in said casing to prevent same from spreading,
8. An electric connecter comprising a soft ?ex
said member having a groove therein, and a rub
25 ber gasket arranged in the groove.
3. An electric connecter comprising a soft ?ex
ible rubber-like casing, an annular metal mem
ber arranged in said casing to prevent the same
from spreading, said member having a groove
30 therein, a rubber gasket arranged in the groove,
a socket shell arranged inside of said casing, said
ible rubber casing, a screw threaded shell im
bedded in said casing, said shell having an in
groove, said groove being greater than a semi
circle in cross section, and. having a resilient
rubber ring therein, providing thereby a portion
rubber gasket being impinged between a light
at the forward end of the connecter of‘resilient‘
rubber of smaller diameter than the screw
globe and the metal member when a lamp is
screwed in said socket, thereby making a mois~
ture and water-proof connection between the cas
threaded shell.
9. An electric connecter comprising a soft, ?ex
ible and resilient casing of insulating material,
ing and the lamp.
4. An electric connecter comprising a soft ?ex_
ible rubber-like casing having an open end, an
25
tegrally formed extension below the threads
thereof, said extension terminating in an annular
a screw threaded shell of conductive material
embedded in said casing, said casing having its
lower end formed with an inner annular groove
annular metal member arranged in said casing ' of arcuate cross section and a ring of ?exible,
~10 at the open end to prevent the rubber-like ma
terial from spreading at the open end, and an
annular rubber gasket removably supported in
said metal member.
5. An electric connecter comprising a ?exible
rubber-like casing, a metal member imbedded in
resilient material in said groove and resiliently
retained therein, said resilient ring being squeezed
between the body of the casing at the groove and
a lamp base when a lamp is screwed in position
in the shell.
DANIEL WOODHEAD.
45
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