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Патент USA US2123422

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July 12, 1938.
c. w. KAUTZ, JR
Filed Sept. 5,1955
5m, lZar/m W?’azzfz; J1.“
‘- Z1!
‘ 2,123,422 4
' 2,123,422
Charles W. Kautz, Jr., Lancaster, Pa.
Application September 5, 1935, Serial No. 39,217
1 claim. (01. 173-343)
‘This invention relates to electric plugs or out
the threaded jacket of an ordinary lamp base, and,
lets, and is herein disclosed ‘as embodied in a plug like that, adapted to make electrical contact with
adapted to be screwed into a standard incan
the thread of the ordinary lamp socket.
descent lamp socket.
The ordinary electric light plug is convenient,
The jacket ll, in assembling the device, is
welded or sweated to a lug l3 projecting across the
5 ‘
but at a slight pull its terminals often slip out of face l5'from the body l9 of a terminal 20 lying
the socket or- outlet where they have been placed, _ in a second passage 2| which extends from the face
us cutting off the current from any device 15 to the face ii.
heated, or lighted or driven by current coming
To cause the terminals l2 and 20 to deliver elec-'
19 through the plug. Often the hold of the ordinary tric current to the wires 22, and 23 of a cable 24, 10
plug is so slight in the outlet that the vibration the cable 24 enters an opening 25 in a plug hous
of parts gradually pulls the plug loose in the ab
ing 26 so that its wires 22 and 23 are held by
sence of any attendant or watcher, with the result screws 21 and 23 to the turned over bottoms of
that the desired heat or light fails or the driven terminals 29 and 39 when the screws 21 and 26
II partstops.
According to the present invention these and
other objections and difficulties are overcome and
are screwed down in‘ the body 26 through the ter- 15
minals 29 and 30.
The terminals 29 and 33 are shown as standing
up within the annular wall 3| of the body 26 and
a plug is provided which cannot come loose or be
accidentally pulled out. ' In the form shown an ‘ having inwardly projecting arms 32 and 33 which
20 outlet is provided with terminals concealed behind
a cover having arcuate openings.
The plug shown is provided with projecting L
shaped terminals adapted to be passed through
enlarged ends of the arcuate openings. Then a
p, 25 twist of the plug carries the L-shaped terminals
The end 36 of the hood 3'! is spaced from the
end It of the body ll, being supported by an
annular rim 38 which engages a rabbet 39 on the 25
body II.
outlet terminals are shown as provided with re
When the arms 32 and 33 have passed through
the openings 34 and 35, the housing 26 may be
turned to cause the inwardly projecting arms 32
ping, besides making impossible slipping by direct
Other features and advantages will hereinafter
continued as narrow arcuate slots 40 and H
ing 26.
In theaccompanying drawing,
Figure 1 is a sectional side view of the plug in
an outlet.
When the arms 32 and 33 reach the terminals
l3 and 20 as the housing 26 is turned, they usually
‘ encounter one of the cam faces 44 and 45 of the
Figure 2 is a section on the broken line 2-2 of
Figure 1.
Figure 3 is a fragmentary section taken at right
‘ angles to Figure 1.
Figure 4 is a section on the line 4—4 of Figure 1.
Fmure 5 shows the plug and outlet separated.
Figure 6 is an end view of the plug.
The outlet member Ill illustrated includes a
solid insulating body I I, carrying a bottom termi
nal l2 like an ordinary lamp base which is elec
59 trically connected to a long terminal l3 lying in
a bore or passage l4 extending from the face l5
on which the terminal l2 lies to the opposite
face 15.
and 33 to engage the ends of the terminals I3 30
and 20.
For this purpose the openings 34 and 35 are
adapted to freely pass the shanks 42 and 43 of the
terminals 29 and 30 as they turn with the hous- 35
end of the body H .
into contact with the outlet terminals, and the
silient jaws adapted to seize the Us of the plug
terminals when the twisting of ‘the plug carries its
3') terminals into the laws.
The jaws grip the plug terminals making close
electrical contact and holding them against slip
are adapted to pass through openings 34 and 35 20
in the end'36 a hood 31 which is carried on the
The member II also carries a metal screw
55 threaded jacket 11, which may be identical with
terminals, so as to cam the terminal slightly up or 40
down and permit the arm 32 or 33 to seat itself
snugly and with good electrical contact into the
jaws of the U 46 which is formed by bending the
lower end of the terminal body horizontally at 41,
then downwardly at 48 and then horizontally 45
back at 49.
To enable each terminal l3 and 20 to adjust
itself to the fairly rigid arms 32 and 33, each ter~
minal l3 and 20 is provided with a stretchable
portion 5|), shown as a V bend in its long stretch 50
within the body I I.
In the form shown the annular wall 3| of the
housing 26 is provided with a rabbet 52 to ?t over
the outer edge of the hood 36, and provided with
circular ridges 53 and 54 for the fingers to grasp. 55
u o! the came a is elongated redi
halihitchoisuchacableoverthebody llasis
allyalongonediameter at It to iscilitste grasp
often done by users of electrical apparatus to pre- '
vent the plug from pulling out.
"mi in'place on the
‘_' fl bodyiibyscrewsI'lthreadedintothe-bodyii.
In the iormsh'own the bottom terminsl l2 is'a
‘It will be observed that the long terminals l8
and II provide spring clip! suitable ior use in
wnll outlets, and for giant plugs such as are used
in motion picture studios.v end for heavy drills.
sanders and other portable machinery.
' .
Having thus described certain embodiments of
the invention, what is claimed is:
into electrical contact withtheterminal i2.
vIn on electric terminal device, an outlet end in
cluding two electric terminals, U-ends on said
'ushortcircuitiormsbetweentheendll andthe
terminals forming Jaws, acover for the terminals.
having openings. :1. iixed mounting for each termi
nal, a. bend in each terminal between the mount
'Domakesurethat no
lug ll,» an elevated ridge .2 projects up from the ‘ing and the jaw adapted to yield, a plug having
two terminals with bent-over ends adapted to
bodyilbetweentheendllandlug ll.
'Dostesdythe U’slleachterniinal II and 2. pass through the cover openings and to be ro
ml! have its metal end bent into a reverse U ll
5 oi the hood end ll. As a result when the
E 82 and It are turned to the Figure 3
tated to seat the ends in the jaws, a rabbeted
housing on the plug adapted to ?t over the cover
and center the bent-over ends to protect them,
and U-extensions oi the U-ends resting on the
inside of the cover to resiliently support the jaws.
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