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Патент USA US2125713

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Aug. 2, 1938.
Filed ‘Feb. 18, 1936
.2, 1938
' 2,125,713
‘ 2,125,713
Arthur M. Drawing, Philadelphia, Pa., assignor to
- ‘
Hugh H. Eby, Inc., Philadelphia, Pa.
‘Application February .18, 1936, Serial No. 64,481 ' I
2 Claiins.._ (Cl. 173—361)
in the body of the tubular prong, sidewall offsets
from the abutment shoulders, and the sidewall
and more particularly to a terminal prong with ' extensions to form the soldering lug.
Fig. 4 shows a top View of Fig. 3.
an integral lugJormed and drawn from strip or
My invention relates to improvements in an
electrical terminal prong with an integral lug,
sheet metal.
Heretofore electrical plug-in devices using a
terminal prong in combination with a separate
soldering lug have been found costly to manu
facture due to the assembly and riveting opera
10 tions, also to the cost of the parts, and further
more detective electrical connections have re
suited from poor riveting of the lug to the prong.‘
One object of my invention is to provide a
tubular terminal prong and soldering lug in one
Fig. 6
Fig. 7
shows an aperture in an insulatingbase
to receive the prong sidewall extensions.
shows a front elevation of a prong with
extensions inserted in an aperture, the'
insulating base being shown in section. .
Fig. 8 shows a view similar to Fig. 7, but after‘
the sidewall extensions have been‘ folded in and
pressed together, providing clamping means and
a soldering lug.
Fig. _9 is a top view of Fig. 8.
A further object is to provide a tubular ter
minal prong with a lug of uniform shape and
ing the integral lug of a prong after the assembly
maximum strength at low cost.
and clamping operations.
A further object is to provide a.tubular ter
20 minal prong with a lug made from sheet metal
in one stamping and drawing operation.
A further purpose‘ is to provide an abutment
shoulder on the prong portion at its open end.
A further purpose is to provide a ‘lateral onset
25 of the sidewall extensions at the termination of
the tubular prong's open end providing means
for forming said sidewall extensions into a. sol
dering lug.
fastening the prong/and the lugv to an insulating
base member.
. Fig. 10 is a top view of an insulating base show
' Fig. 11 is a side elevation of Fig. 10,
Referring to the drawing like numerals refer to
like parts in the ?gures where they appear.
To produce a tubular prong, seamed and with
uniformly true sidewalls, having the same ex
tended and providing means for forming a sol
dering lug, and also means for anchoring the
prong with the lug unit in an apertured base, I
I provide a ductile strip or ?at sheet of metal of
correct uniform width so that when the prongs
A further purpose is to provide sidewall ex
30 tensions at the termination of the tubular sec
tion of the prong to form means for rigidly
Fig. 5 shows a side elevation of Fig. 3. '
are formed by the drawing and folding 'method,
iii and it’ become seams i l and I i’of the tubular
body portion i2 whenthe blank is forced into the
cavity ii and the remaining portion’ of the blank
is forced into the cavity it. being con?ned inside
A further object is to provide an integral ter
minal prong and lug in combination with an elec
and out by punch and die so that when the shoul
trical plug-in device.
die, the tapered end portions 22 of the blank are ‘
A still further purpose is to provide an insulat—
der iii of the punch enters the cavity it of the
pressed outwardly and form the shoulder it, and
ing base having suitably formed apertures to’ the parallel sidewall extensions it areiormed
receive and hold a drawn metal prong with an
40 integral'lug.
With the foregoing and other objects in view I
devised ‘ an improved construction and
method of fabricating from sheet metal an intee
grai terminal prong and soldering lug, and my
5' invention lies in the structure and features here
inaiter described and claimed.
Referring to the drawing:
Fig. 1 shows a metal strip with the ends ta
pered and punched to form an integral soldering
lug prior to drawing and forming ‘operation.
- Fig. 2 shows a punch and a cross section thru
when ‘the aforementioned shoulder ‘it of the
punch presses outwardly and down on the strip 4:0
oi’ sheet metal, seating the same on the shoulder
it of the die. This shoulder may be formed at
any .point intermediate the rounded closed end
it and the ends of the sidewall extensions 23.
By increasing the diameter of the die cavity 20
over that of‘ the cavity 2! and employing a blank
of uniform width as between points 25 of. the
blank shown in Fig. 1, an abutment shoulder i5 is
formed. separating the sidewall extensions... it‘ v
with clearance space it between the same.
Ta- .
pered end portions 22 of’ the blank shown in Fig.
a die for drawing and forming a tubular prong
1 are pierced at it and a common lug is formed
with an integral lug according to my invention.
Fig. 3 shows a ‘ii-out elevation oi'the prong
'55 andulug also showing one oi! the two iold seams
after mounting the prong on the insulating base,
providing means for attaching a wire terminal 3 i ,
as shown in Fig. 8. An insulating base it, Fig._
10,‘ is apertured as shown in Fig. 6 thru which
Having thus set forth the nature of my inven
prong sidewall extension pieces I‘ are inserted , tion, what I claim is:
as shown in Fig. 7.
A portion of said extension
1. In combination, a base member of insulat
pieces It extends thru and past the top surface
ing material having an aperture therethrough,
25 of the aforesaid base and after the abument
portions of the said extension pieces M are then
the aperture being generally circular and the
wall thereof being provided with apluralityj of
inwardly extending projections, and a generally
tubular terminal prong secured in said aperture,
the said prong having upwardly extending side
folded over and pressed inwardly until both of
aforesaid sidewall extensions are pressed to
wall extensions, the diametral distance between
the sidewall extensions being greater than the
shoulder i5 01’ the tubular prong I2 is ?rmly
seated against the under side of the base pro
jections 21 in the aperture, and the projecting
gether as at QL'fOI‘ITLiHg a common soldering lug
diameter of the prong proper and the projec
and also providing means for clamping the prong
tions in the aperture extending into the spaces
between the said projections whereby the prong
is prevented from rotation.
2. A plug-in device comprising a base member
having an aperture therethrough, the wall of the
aperture being provided with a plurality of in
and lug unit securely in the aperture of the
insulating base.
An aperture 28:: in an insulating base member
26 to receive and hold a prong with a lug member
is shown in Fig. 6 in which 29 shows the edge of
said base, the aperture is generally circular in
form, its diameter being slightly larger than the
overall dimensions of the prong at the shoulder
IS, the base projections?! extend inwardly from
wardly extending projections, aterminal prong.
generally tubular in con?guration and provided
at one end with a plurality of axially extending
lugs o?set radially therefrom, the said lugs be
ing spaced apart circumferentially of the prong a
distance substantially equal to the width of the
the circumferential edge 28 of the aforesaid aper
ture providing means for preventing turning of
the prong with its integral lug and also provid
aperture wall projections andv the said lugs be-' -
ing means for seating the prong abutment shoul
projections are interposed between them, where
ing so disposed in the aperture that the said
der l5 and for folding over of the sidewall e'x— . by the prong is prevented from rotation.
tensions H at 32, as previously stated.
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