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Патент USA US3084313

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April 2, 1963
s. E. GREGOIRE El‘AL
3,084,303
ELECTRICAL CONNECTOR
Original Filed Oct. 1, 1957
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3,084,303
ELECTRECAL CONNEQTQR
Stephen E. Gregoire, Sidney, Richard J. Davies, Afton,
and Samuei A. Schroeder, Baiuhridge, N.Y., assignors
to The Bendix Qorporation, Sidney, N.Y., a corporation
of Delaware
Patented Apr. 2, 1953
2
to which said cylindrical portion is circumferentially
brazed by means of a ?ne silver or nickle braze.
The
central cone-like portion 16 and the inner unsecured por
tion of ?ange 17 function as a ?exible diaphragm which
absorbs or compensates for diiferences in the expansion
and contraction of the various assembled parts when the
same are subjected to wide variations of temperature. A
Original application Get. 1, 1957, Ser. No. 687,417, now
hermetic seal is also formed by member 14 between insu
i’atent No. 2,982,937, dated May 2, 1961. Divided
and this application Aug. 31, 1960, Ser. No. 53,205
lator 12 and shell ‘10.
13 Ciaims. (Ci. 33§--3ti)
A novel socket contact assembly is provided within and
10
hermetically seals the bore through insulating tube 12.
This invention relates to electrical apparatus and more
‘Said assembly comprises an inverted cup-like metallic
particularly to means for effecting terminal connections
between electrical conductors.
member 18 having a cylindrical portion 19 and an internal
?ange 20 connected ‘by a cone-like portion 21. Cylin
This application is a division of application Serial No.
687,417, ?led October 1, 1957, now Patent No. 2,982,937, 15 drical portion 19 is circumferentially brazed to ‘a metallic
coating on the inner surface of the end portion of insu
issued May 2, 1961.
lating tube .12. A cup-like socket contact 22 has a clear
One of the objects of the present invention is to pro
ance ?t in the bore of insulator 12 and engages the closed
vide a novelly constructed electrical terminal which will
end of member 18. The adjacent ends of cup members
provide a satisfactory electrical connection throughout
a Wide range of temperatures and at substantially high 20 18 and 22 are preferably provided with matching holes
for receiving a rigid pin 23 which may ‘function as a rivet
temperatures.
mechanically connecting said members and as a connector
Another object of the invention is to provide novel co
‘for a conductor within casing '11. The parts may be
operating male and female electrical terminals for effect
silver soldered or brazed together around the pin-receiv
ing a connection between conductors in hermetically
25 ing hole to complete the hermetic sealing of the bore of
sealed units.
insulator 412. Member 18 functions as a diaphragm while
Another object is to provide electrical terminal means
member 22 is slidable in tube 12 to compensate for rela
wherein parts having different coe?icients of expansion
tive movement of the parts caused by expansion and con
are novelly constructed and assembled to compensate for
traction caused by the heating and cooling of the parts in
expansion and contraction of such parts resulting ‘from
temperature variations extending from below ‘—65° F. to 30 operation. Cup member 22 is advantageously made of
nickel or is nickel plated to prevent its becoming oxidized
1000° F. and more.
during use.
The above and further objects and novel features of
The plug or male terminal of the connector is likewise
the present invention will more fully appear from the
novelly constructed to function with complete satisfaction
following detail description when the same is read in con
nection with the accompanying drawings. It is to be 35 at high as well as low temperatures and to provide an her
metic end seal for a conductor conduit. As shown, the
expressly understood, however, that the drawings are for
lead assembly embodying the plug terminal comprises a
the purpose of illustration only and are not intended as a
de?nition of the limits of the invention.
In the drawings, wherein like reference characters refer
to like parts throughout the several views,
FIG. 1 is an elevation view, mostly in section and with
parts broken away, showing one form of electrical con
nector means embodying the present invention; and
FIG. 2 is a detail elevation view of a part of said ter
conductor 24 covered with electrical insulation 25 which
will withstand high temperatures. In one suitable em
40 bodiment, conductor 2-4 was wrapped with tape consisting
of ceramic ?bers in sheet form laminated with glass cloth
and covered with one or more ‘braided layers of yarn
made of silica ?bers. The insulated conductor may be
covered by a tube 26 of woven metallic strands. Sur
45 rounding the shielded cable above described, is a ?exible,
minal.
impervious conduit comprising ‘a corrugated metal tube
The single embodiment of the invention illustrated in
27 covered by a braided metal tube 28. The ends of
the accompanying drawings, by way of example, is in the
tubes 27 and 28 are connected together, such as by heliarc
form of separable or detachable connector means adapted
welding, in a welded assembly with a ring 255 and a metal
for making an electrical connection between electrical
sleeve 30 to form an hermetically sealed joint. The
conductors in hermetically sealed containers or conduits.
braided cover 26 of the cable is cut off short of the end
The novel construction shown is designed to Withstand
of insulated conductor 24, 25 and is circumferentially
the high temperatures encountered in use on jet type
fanned ‘out at 31 to lie between ring 2% and the end of a
engines, missiles and the like and to hermetically seal an
metal tube 32. The engaging par-ts are welded, as by heli
insulated conductor in a ?exible shielding conduit for pro
tection against electrical ?ZiSJOV?i‘S at low atmospheric 55 arc Welding, to form an hermetically sealed joint.
The insulated conductor 24, J25 extends into a ceramic
pressures occurring at high altitudes.
tube 33 which is novelly suspended or supported within
In the form illustrated, the socket contact assembly of
and in radially spaced relation to metal tube 32 by a metal
the novel structure contemplated by the invention com
diaphragm 34. The latter may consist of two cylindrical
prises a tubular metallic shell iii hermetically secured in
an opening of a casing 11. The shell and casing may be 60 portions 35 and 36, one of which ?ts into and is circum
ferentially brazed to metal tube 32, and the other of which
integral if desired. A tube or sleeve 12 of heat resistant
surrounds and is brazed to an external metallic coating
refractory insulating material is novelly supported or sus
on the end portion of ceramic tube '33. The cylindrical
pended in shell 16 in radially spaced relation thereto, and
portions 35, 36 are integrally joined by a conical portion
the annular space between the two is hermetically sealed
by a ?anged metal tube 14 which may be made, for exam 65 317 which provides for any necessary relative movement or
expansion between the connected parts when the same are
ple, of nickel, nickel plated steel, stainless steel, or other
subjected to temperature variations.
suitable metal. The tube 14 comp-rises a cylindrical por
The lower or outer end portion of insulating sleeve 36,
tion 15, a central cone-like portion 16 and an external
as viewed in the drawing, is of reduced diameter for pass
annular ?ange 17 which engages and is soldered or brazed
throughout its circumference to a downwardly facing 70 ing an uninsulated end portion of conductor 24. Sur
rounding said reduced end portion and brazed to a metal
shoulder in shell 1%. Within cylindrical portion 15, in
lic coating thereon in a hermetic manner is a tubular metal
sulating tube 12 is provided with a metallic surface coating
3,084,393;
A.
lic tip or nose piece 38, the end of which preferably ex
tends beyond ceramic tube 33. Conductor 24 extends be
yond the tip piece and through a central opening in the
bottom of a cup-shaped; male contact terminal 39, and
the three are heliarc-ror otherwise suitably welded to form
an hermetic seal at the end of the bore. through; tip
piece 38.
Contact member 353 has the side walls thereof slotted, to
form a plurality of resilient ?ngers 4%} (FIG. 2) and is
thereto, a hVeat-expansible member positioned between
each of said ?nger members and said conductor whereby
upon a rise in temperature said heat-expansible member
will expand and back up, said ?nger members.
4. A separable electrical connector comprising in com
bination a. socket contact and a pin contact adapted to be
received Within and make electrical contact with the
socket contact, a central axially extending conductor, the
pin contact being generally cup shaped and telescopically
adapted, to slidably ?t into socket contact 22 for electrical 10 positioned over the end of said conductor, and having a
contact therewith. For. the purpose of assuring ?rm and
good electrical contact between ?ngers ‘til-and socket 22
under high‘ heatv conditions, contact terminal 3-9~-rnay, be
of bi-metal construction and of‘ such a naturethat??g?rs
40 will bend. or push. outwardly when subjected to heat.
Preferably, however, contact member 39 is fabricated
transverse bottom portion and, longitudinally slotted side
wall-portions, a bimetallic member positioned coaxially
of said conductor and radially inwardly of the sidewall of
said pin contact, said bimetallic member being expansible
upon. a rise in temperature and backing up the sidewall of
the pin contact.
from soft annealed nickel or- the like and a split annular
5. A separable electrical. connector comprising in com
bination a socket contact and a pin contact adapted to be
received within and make electrical contact with the
and held against axial displacement by an annular groove 20 socket contact, a ?rst axially extending conductor elec
42 in tip piece 38; Member lil'exertssome expansive
trically connected to said socket contact, a- second axially
bimetallic member 41 capable of ‘withstanding extremely
high temperatures is provided ‘within terminal member 39
force upon- member 39 at room temperature, to assure
good contact’ between members 39 and 22. When sub
jected to high temperatures, the bi-metallic member 41
expands to maintain ?ngers 40 in ?rm and good electrical
contact with, socket contact 22.
r
The connector parts may be positively held‘ in; assem
bled position by detachable means, asshown. A ?anged
nut 44 ?ts over and contactsthe edge of a ?ange 451'on
extending conductor electrically connected to- said pin
Contact, means to mount said; ?rst conductor and socket
cont-act for axial movement relative to the pin contact
upon a rise in temperature, means to mount said second
conductor and pin contact for axial movement relativeto
the socket cont-act upon arise in temperature, said pin
contact comprising a plurality of ?nger portions radially
de?ectable. toward said socket contact and means to cause
housing member 32. The nut has. threaded engagement 30 said ?nger portions to be radially urged ‘against said socket
at 46 with‘ the confronting end, of housing [ML-thereby to
contact upon a rise in temperature.
drawand maintain the. two housings together. If‘desired,
6. A separable electrical; connector comprising in com
the two housings may be sealed to. each other by any an
bination a'socket contact and a pin contact adapted to be
nular sealing- ring 49 whichis carriedin a seat on. the end
received within and make electrical contact with the socket
of housing 10 and is compressed between the ends; of'the ' ‘contact, a ?rst axially extending conductor electrically
housings. Housing 32 may be extended, if: desired, in a
connected'to said socket contact, a second axially extend
circular cylindrical portion 47'which lies between housing
ing- conductor electrically connected to said pin contact,
110 and tubular insulator 12. Portion 47' aids in the‘pre
means to mount said ?rst conductor and socket contact for
liminary- aligning of the connector parts upon their as
axial movement relative to the pin contact upon- a rise
sembly, andv also functions ‘tog-guard» the parts of- the male 40 in- temperature, means to mount said second? conductor
or pin connector against injury’ when it is disconnected
and pin contact for axialv movement relative to the socket
and withdrawn from socket 22‘ and housing 10‘.
contact upon- a rise in temperature, said pin. contact having
Although only one embodiment of‘ the invention has '
a plurality of ?nger portions radially displaced from. said
been illustrated, in the accompanying drawings and de
second conductor and radially de?ectable toward said
scribed in the foregoing speci?cation,‘ it is to be expressly 45 socket contact, and a heat-expansible member retained
understood that various changes, such as in the relative
adjacent a surface of said. ?nger’ portions whereby upon
dimensions in the parts, materials used, and'the like as
arise in temperature said member will expand and back
Well as the suggested manner- of meat the apparatus of
up each of said ?nger portions.
the invention, may be made therein without departing
7. A separable electrical connector comprising in- com
50
from the spirit and scope of ‘the invention as will now be
binationv a socket contact and a pin contact adapted to
apparent to those skilled; in the art.
be received within and make electrical contact with the
What-is claimed is:
,
socket contact, the pin contact being hollow- and having
l. -A separable electrical connector comprising in com
a relatively thin sidewall which is longitudinally slotted
bination a socket contact and a pin contact adapted toybe
to provide portions generally radially deflectable toward
received within and make electrical contact with the
socket contact, a conductor for said pin contact, said‘ pin
contact comprising a plurality of resilient ?nger members
secured to said conductor and radially spaced» from, and '
the other contact, and a generally annular bimetallic
member- positioned coaxially of the pin contact and radi
ally inwardly of the sidewall thereof, said annular mem
ber being expansible upon. a rise in temperature and back
extending axially of saidjconductor with the external snr-'
ing up the sidewall of‘the pin contact.
faces thereof adapted‘ to engage said socket contact,,heat 60
8. A separable‘ electrical connector as claimed in claim
expansible means positioned between said conductor and
7, comprising a hollow, axially extending substantially
said ?nger members andadapted to contact the internal
rigid'insulating member, the pin contact including a radi
surface of said ?nger members upon expansion whereby
ally outer member which is generally cup shaped; said
said ?nger members are held in, contact with said socket
outer member being centrally telescoped over the end of
contact throughout an extended range of’ ambient tem
the insulating member, and means on the insulating mem
peratures.
ber positioning the annular bimetallic member axially of
2. An electrical connector as de?ned in claim .1 com
the insulating member, said last named means having a
prising means on said conductor to prevent the axial dis
transverse portion secured tol-abut- the end of the insulat
placement of said heat-expansible means.
a
3. A separable electrical connector comprising in com 70 ing member.
bination a socket contact and a pin contact adapted to be
socket contact,v an axially extending conductor, said pin
9. A separable electrical connector as claimed in claim
8, wherein the means positioning the annular bimetallic
member has an annular seat for said bimetallic member
contact comprising a plurality of ‘?nger members radially
displaced from said conductor and electrically connected
spaced axially from the bottom portion of said outer
member, said annular seat loosely receiving the'annular
received within and make electrical contact?with the.
3,084,303
5
6
bimetallic member to allow the latter appreciable free
dom of movement in axial and radial directions.
spaced radially inwardly of the second shell, the socket
contact being centrally positioned Within and sealingly
10. A separable electrical connector as claimed in
connected to the second ceramic tube, and resilient dia
claim 9, wherein the insulating member is tubular, and
phragm means sealingly connecting the second ceramic
comprising a conductor extending axial-1y within the in 5 tube to the second shell, the inner end of the ?rst ceramic
sulating member and electrically connected to the bottom
tube being telescoped within the inner end of the second
portion of said cup-shaped outer member.
ceramic tube when the two shells are in confronting sealed
11. A separable electrical connector as claimed in claim
position and the pin contact is telescoped within the
10, wherein the insulating member is a ceramic tube, and
socket contact.
comprising an outer tubular metallic shell disposed co
axially of and spaced radially outwardly from the ceramic
tube, and means sealingly connecting the shell and the
10
ceramic tube, said last named means comprising a ?exible
annular metallic diaphragm having its radially outer
larger diametered edge portion bonded to the shell and 15
its radially inner smaller diametered edge portion bonded
to the ceramic tube.
12. A separable electrical connector as claimed in claim
11, comprising a second outer tubular shell adapted to
be aligned with and sealed to the ?rst recited shell, a 20
second elongated ceramic tube positioned coaxially of and
13. An electrical connector as de?ned in claim 3,
wherein said heat-expansib-le member is a bimetallic mem
ber.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,635,832
Gagnon ______________ __ July 12, 1927
2,339,329
Funk ________________ __ Jan. 18, 1944
140,318
537,757
Great Britain _________ __ Mar. 25, 1920‘
Great Britain _________ __ Aug. 15, 1941
FOREIGN PATENTS
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