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Патент USA US3032751

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May 1, 1962
R. E. FITZ GERALD
3,032,741
ELECTRICAL ASSEMBLY
Filed April 15, 1959
Fig". 2.
46 48 50
6'3
Invenior.‘
Ro'a'eawi E. ?fi'l't'zélerahl,
ited
tates
atent O
1
3,032,741
ELECTRICAL ASSEMBLY
Robert E. Fitz Gerald, Quincy, Mass, assignor to United
Carr Fastener Corporation, Cambridge, Mass, a corpo
ration of Delaware
Filed Apr. 15, 1959, Ser. No. 806,482
2 Claims. (Cl. 339-452)
3,832,741
Patented May 1, 1962
2
toward one end 42 to provide lead for insertion within
the eyelet 28. A series of circumferentially aligned pe
ripheral slots 44 are formed on the tubular portion 38
above the taper and spaced from each other by ribs 46.
A stop portion 48 is longitudinally spaced from the pe
ripheral slots 44 and is of lesser diameter than the eyelet
28 but of greater diameter than the inner diameter of the
circumferential grooves 34. Lugs or staking means 50
are formed on the free end of the wiring connector for at
This invention relates generally to lamp socket assem
blies and has particular reference to wiring connectors 10 tachment to suitable wiring 52.
To assemble the wiring connector 36 with the headed
adapted to be snapped into engagement with the terminal
eyelet 28, the tapered end ‘42 is inserted into the end and
contacts assembled therewith.
continuous pressure applied so that the connector 36 will
Detachable wiring connectors heretofore used in indus
?ex causing the longitudinal gap 40 to narrow and reduc
try and particularly in automotive wiring have been of
ing the diameter of the connector. The inherent resilient
the staked wire type and their particular con?gurations
characteristics of a connector of this construction will
have required high insertion pressure but which could be
allow it to pass into the headed eyelet '28 to a point where
withdrawn under pressures in the magnitude of twelve
the circumferentially aligned series of slots 44 enter into
pounds. Difficulties have been experienced with existing
snap engagement with the walls of the circumferential
wiring connections in that they are not vibration proof
grooves 34. The stop portions 48 are spaced from the
and result in faulty electrical connections and open cir
slots 44 a predetermined distance to prevent excessive
cuits.
pressure being put on the connector 36 during insertion
The object of my invention is to provide a wiring con
and to insure proper alignment of the slots 44 with walls
nector of a new and improved construction having high
of the circumferential groove 34. It will thus be seen that
withdrawal pressures.
Another object of my invention is to provide a detach 25 the tapered end 42 permits relatively easy insertion but
when the walls of the circumferential groove 34 are re
able wiring connector which will resist vibration and me
tained within the slots 44, dislodgement by vibration in
chanical strain.
other means will be effectively reduced.
A further object of this invention is to provide a resili
Since certain other obvious modi?cations may be made
ent wiring connector having means for snap engagement
30 in this device without departing from the scope of the in
with a terminal contact.
vention, it is intended that all matter contained herein
Other objects of the invention will, in part, be obvious,
be interpreted in an illustrative and not in a limiting sense.
and will, in part, appear hereinafter.
I claim:
In the drawing:
1. An electrical connector assembly for snap insertion
FIG. 1 is a view in elevation of the male wiring con—
35 into a lamp socket base comprising in combination a con
nector;
tact member consisting of a closed eyelet having an annu
FIG. 2 is a top plan view of the connector as shown in
lar detent therein and a tapered tubular barrel, said barrel
FIG. 1;
having an open slot on one lateral surface providing for
FIG. 3 is a view in elevation, partly in section illustrat
radial ?exibility, said slot widening at a point above the
ing the male connector snapped into engagement with a
40 taper into a peripherally extending aperture, a stop portion
female terminal contact;
spaced from said tubular barrel by said slot and connected
FIG. 4 is a view in section, partly in elevation, of the
therewith by depressed longitudinal bridges de?ning a
terminal contact carrying means with the wiring snapped
peripheral groove, said peripheral groove cooperating with
into engagement therewith, prior to assembly with a lamp
the annular detent of the eyelet for retention therein.
housing;
45
FIG. 5 is a section taken on line 5-5 of FIG. 4.
2. A removable terminal connector for insertion into
Referring to the drawing there is shown a lamp socket
a lamp socket base comprising in combination an im
145 of the type used in automotive illumination which is
proved contact member including a closed eyelet having a
adapted to be snapped into an opening 12 in a support
detent ?ange formed therein and a wire terminal, said
14 and retained by means of spring ?ngers 16. The lamp
wire terminal comprising a tubular male member tapered
socket 10 comprising an open ended housing 18 for re
along the longitudinal axis to facilitate initial insertion
ceiving the base of a lamp bulb 20 and terminal contact
within the eyelet member and being longitudinally divided
carrying means 22 extending rearwardly therefrom. The
by ‘an open slot to provide radial ?exibility, slots formed
housing 18 has J-slots 24 for retention of the base of the
in the periphery of said tubular male member above the
taper and separated from each other by longitudinal
lamp bulb 20.
The contact carrying means '22 are of the type which is 55 bridges, said bridges forming with the slots a peripheral
fully described in my copending application, Serial No.
groove adapted for cooperative engagement with the detent
731,822, ?led April 29, 1958, and now Patent No. 2,912,
flange of said eyelet to secure the wire terminal with the
669, issued November 10, 1959, and comprises an in
contact after insertion thereof.
sulated housing 26 having a pair of headed eyelets 28
60
disposed therein and retained in assembly by ‘a ?ared
References Cited in the ?le of this patent
opened end portion 30. The eyelets 28 are resiliently
UNITED STATES PATENTS
biased in the direction of the bulb 20 by spring means
F1,536,083
Douglas ____________ __ May 5, 1925
32. A circumferential groove 34 is formed in the eyelet
1,678,138
Douglas ___ __________ .._ July 24, 1928
on the exterior lateral surface at a predetermined point
65 1,995,172
Douglas ______________ .. Mar. 19, 1935
for a purpose to be described hereinafter.
2,430,543
Tinnerman __________ __ Nov. 11, 1947
The Wiring connector 36 as illustrated in FIGS. land
2 is formed from a resilient sheet metal blank rolled to
UNITED STATES PATENTS
form a generally tubular portion 38 having a longitudinal
Great Britain _________ _.. May 10, 1950
636,845
gap 40 on one surface. The tubular portion is tapered
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