U.S. patent number 3,808,581 [Application Number 05/274,376] was granted by the patent office on 1974-04-30 for socket assembly.
This patent grant is currently assigned to TRW Inc.. Invention is credited to Robert T. Murray.
United States Patent |
3,808,581 |
Murray |
April 30, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
SOCKET ASSEMBLY
Abstract
An indicator light assembly having a socket and an integral
cover. The socket includes two distinct compartments, one housing a
bulb and resistor, and the second housing a pair of spring, sheet
metal contacts. The contacts are electrically insulated from one
another and each embodies a first portion for engaging a wire lead
from the bulb and/or resistor, and a second portion having a free
end for bightingly gripping the stripped end of a conductor from an
electrical energy source inserted into an appropriate opening in
the end of the second compartment remote from the first
compartment.
Inventors: |
Murray; Robert T. (Needham,
MA) |
Assignee: |
TRW Inc. (Cleveland,
OH)
|
Family
ID: |
23047917 |
Appl.
No.: |
05/274,376 |
Filed: |
July 24, 1972 |
Current U.S.
Class: |
439/490; 439/438;
340/815.49 |
Current CPC
Class: |
H01R
4/4818 (20130101); F21W 2111/00 (20130101) |
Current International
Class: |
F21S
8/00 (20060101); H01R 4/48 (20060101); H01r
013/66 () |
Field of
Search: |
;339/59L,95D,119,147,176L,208,210 ;340/381 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Moore; Richard E.
Attorney, Agent or Firm: O'Connor; James R.
Claims
1. A socket assembly for an electrical bulb comprising a socket
member and a cover member integrally connected to said socket
member, said socket member including a first compartment for
housing a bulb and at least two lead wires for supplying electric
current to said bulb and a second compartment housing a pair of
spring, sheet metal contacts, said contacts being electrically
insulated from one another by means formed integrally with said
second compartment, each of said contacts having a first portion
for contacting one of said lead wires and a second portion having a
free end adapted to bightingly grip a conductor from a source of
electrical energy, said second portion of each of said contacts
including a pair of arms connected by a substantially U-shaped
bite, one of said arms terminating in said free end and being
deflectable toward the other arm to permit insertion of a conductor
from an energy source between the free end of said arm and a
confronting surface of said second compartment of said socket
member, said cover member having means thereon for urging said lead
wires against said first portions of said contacts and for urging
said second portions of said contacts into clamping engagement with
conductors
2. A socket assembly according to claim 1 wherein said socket
member includes a notch for receiving a resistor carrying wire
leads and said means on said cover are adapted to retain the
resistor in said notch and to urge one of the resistor leads into
an electrical contact with one of
3. A socket assembly according to claim 1 including cooperating
means on said socket member and said cover member defining a pair
of spaced openings at one end of said socket member, said openings
being adapted to receive conductors from an energy source and being
disposed substantially
4. A socket assembly according to claim 1 including cooperating pin
and socket means adapted to be releasably engaged to retain said
cover in a closed condition on said socket member.
Description
DESCRIPTION OF THE PRIOR ART
In the past, several methods have been used to connect the leads
from the bulb of an indicator to power supply leads disposed
outside of an indicator assembly per se. An early method of
attaching the leads to a connector was to crimp or solder a
connector, having an aperture formed therethrough onto the leads.
The lamp housing typically included a base portion having a hole in
the bottom wall thereof and a fastener such as a rivet was passed
through the aperture in the connector, the hole of the housing and
through a hole in a portion of an electrical terminal and upset to
secure the aforesaid elements.
Other indicators in the prior art utilized metal connectors which
were crimped to both the stripped ends of power supply leads and to
the leads extending from the bulb, in effect a parallel splice.
Still other heretofore known indicators, such as that disclosed in
U.S. Pat. No. 3,233,033, utilized blade terminals which were
pressed and locked into an indicator housing having the bulb leads
extending into an interference area where they were jammed between
the terminal and the housing to effect the requisite electrical
connection.
SUMMARY OF THE INVENTION
A socket assembly for an electrical bulb comprises a socket member
and a cover member integrally connected thereto. The socket member
includes a first compartment for housing a bulb and at least two
wire leads for supplying electric current to the bulb and a second
compartment housing a pair of spring, sheet metal contacts. The
contacts are electrically insulated from one another and each
contact has a first portion for engaging one of the said lead wires
and a second portion having a free end which is adapted to
bightingly grip a stripped end of a conductor from a source of
electrical energy. The second portion of each of said contacts
includes a pair of arms connected by a substantially U-shaped bite.
One of the arms terminates in the free end and is deflectable
toward the other arm to permit insertion of the stripped end of a
conductor from a source between the free end of the arm and the
confronting surface of the second compartment of the socket. The
cover has means thereon for urging the lead wires against the first
portions of the contacts and for urging the second portions of the
contacts into a clamping engagement with the ends of conductors
from the energy source inserted into the socket.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top plan view of an indicator housing according to the
invention with the cover open;
FIG. 2 is a central longitudinal cross section;
FIG. 3 is an end elevational view of the housing looking from the
lower end of the housing as depicted in FIG. 1;
FIG. 4 is an end elevational view of the housing looking from the
upper end of the housing as depicted in FIG. 1;
FIG. 5 is a top plan view of the indicator assembly shown in FIG. 2
with the cover member open; and
FIG. 6 is a side elevational view of the indicator housing with the
cover closed.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In the drawings there is shown a socket assembly for an indicator
light comprising a body having a socket member 10, a cover member
12 connected to the socket member 10 by a comparatively thin,
integral web 14 forming a hinge, a harness, a pair of connectors 16
and a shunt resistor 18.
The socket member, cover and web are formed of a plastic material
and the socket member 10 includes a generally rectangular mounting
portion 20 and a rectangular contact portion 22 integrally
associated with and extending substantially perpendicularly from
the mounting portion 20. The mounting portion 20 comprises a base
portion 24 having a pair of walls 26 extending in right angle
relation thereto and in spaced parallel relation to each other.
The forward wall 28 of the mounting portion 20 is integral with and
extends from the base portion 24 and between the walls 26, thereby
providing the box like configuration of the mounting portion 20. A
keyway 30 is formed through the base portion 24 and a flexible wing
32 extends from the external surface of each of the walls 26 in
acute angular relationship to the planes of the walls 26 and each
wing has a free terminal end extending below the plane of the lower
surface of the base portion 24 as is best seen in FIGS. 1 and 5.
The terminal ends of the wings 32 are bent so as to lie in planes
which are in parallel relationship to each other and to the plane
of the walls 26.
The contact housing portion 22 of the socket member 10 comprises a
pair of side walls 34 which extend integrally from a base 36 in
right angle relation thereto forming a box like shape. The contact
housing portion 22 is divided longitudinally by a partition wall 38
which extends upwardly from the base 36. The upper surface of the
partition wall 38 lies coplanar with the upper surfaces of the side
walls 34. A transverse notch 40 is formed in the partition wall 38
said notch extends downwardly a substantial distance so that the
bottom thereof is disposed proximate the base 36. A dividing wall
42 disposed in transverse, right angle relationship to the
partition wall 38 extends between the side walls 34. The dividing
wall 42 is disposed in spaced parallel relation to the base portion
24 of the mounting portion 20, and extends a substantial distance
below the base 36 of the contact housing portion 22, as is best
seen in FIG. 2. A sloping wedge shaped separator portion 44 extends
from adjacent the upper surface of the dividing wall 42 a
relatively short distance toward the base portion 24 of the
mounting portion 20. A cavity 46 having a chamfered lead open end
is formed in dividing wall 42 adjacent the separator portion
44.
The cover member 12 is generally rectangular in configuration and
includes a floor portion 48 and spaced, parallel side walls 50
extending upwardly from the longitudinal edges of the floor
portion, as best seen in FIG. 1. A rectangular platform portion 52
which is spaced from one transverse end of the floor portion 48
extends between the sidewalls 50. A pair of rectangular stud
portions 54 extend from the upper surface (as seen in FIG. 1) of
the platform portion 52 adjacent one of its terminal ends. The stud
portions 54 are spaced from each other and from an imaginary plane
passing through the longitudinal center line of the cover member
12. A pin 56 extends upwardly from the platform portion 52 of the
cover member 12 forwardly of the stud portions 54. The end wall of
the cover member 12 most remote from the pin 56 defined by a rear
wall which has a pair of projections 58 extending upwardly
thereform. Each of the projections 58 has a trapezoidal
configuration as viewed in elevation. The end wall of the cover
member 12 forms one of the walls of a pair of rectangular pockets
60 which are spaced from each other and disposed on opposite sides
of the longitudinal center line of the cover member 12.
The harness includes a bulb or lamp 62 having a pair of bulb
conductor leads 64 extending therefrom. One of the bulb conductor
leads 64 is connected to a resistor 66 from which a lead 67
extends.
Each of the connectors 16 is formed from flat, springy,
electrically conductive sheet metal and each includes a
transversely arced contact arm 68 having a free terminal end 70.
The contact section 68 is integrally connected to an intermediate
portion by a substantially U-shaped bight and thus is disposed in
spaced, angular relationship to the intermediate portion, as best
seen in FIG. 2. The end of the intermediate portion of each
connector 16 is formed into a step like free end 72.
The indicator light is assembled by placing a connector 16 into
each compartment formed by the base 36, the partition wall 38 and
the side wall 34 with the free end 72 of the connector 16 overlying
the upper edge of the diving wall 42 and the terminal end 70
directed toward the base 36. The harness is inserted into the
cavity defined by the walls of the mounting portion 20 and the
terminal end of the bulb conductor lead 14 that is not attached to
the resistor 66 and the lead 67 are bent and placed in position to
overlie the free ends 72 of the connector 16 as shown partially in
FIG. 2. The shunt resistor 18 is dropped into the notch 40 so that
it lies transversely of the longitudinal axis of the contact
portion 22. The left lead of the shunt resistor 18 is in superposed
abutting relation to the stepped end 72 of one of the connectors 16
and the right lead overlies in abutting relation the end 72 of the
other connector 16. The cover member 12 is then closed on the
socket member 10 by rotating the cover about the hinging web 14.
One of the stud portions 54 presses down on the lead 67 of the
resistor 66 while the other stud portion presses down on the bulb
conductor lead 64 forcing the leads into abutting electrical and
mechanical engagement with the free ends 72 of the connectors 16.
Each of the bights of the connectors 16 extends into a pocket 60 in
the cover and the projections 58 partially close off portions of
the openings to the contact housing compartments thereby providing
small cable receiving openings and flexing the contact sections 68
toward the intermediate portions of the contacts to permit stripped
wire leads from power fource to be inserted between the terminal
ends 70 of the connectors and the inner surface of the base 36.
Thus as is best depicted in FIG. 2, the strip ends of the wire
leads 74 when inserted beneath the free ends 70 of the contacts are
bightingly gripped thereby to provide an efficient electrical and
mechanical connection. Obviously, withdrawal of the wire leads is
firmly resisted by what is, in effect, a bighting, ratchetlike
engagement of the free ends of the contacts with said leads.
It is to be understood that the foregoing description of a
preferred embodiment of the invention is to be construed as
illustrative rather than a restrictive sense and that the scope of
the invention is best defined by the following claims.
* * * * *