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Патент USA US3036179

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May 22, 1962
B. J. .KIENLEN ET AL
3,036,169
SHIELDED ELECTRICAL SWITCH
Filed Nov. 10, 1960
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United States
1
3,036,169
SHIELDED ELECTRIQAL SWITCH
Berthol J. Kienlen, Washington, D.C., and Norman G.
Hayward, Fairfax County, Va., assignors to Cooke En
gineering Company, Alexandria, Va., a corporation of
Delaware
Filed Nov. 10, 1960, Ser. No. 68,441
12 Claims. (Cl. 200--51.1)
ice
3,036,169
Patented May 22, 1962
2
type with su?‘lcient length so that when the correspond
ing male and female connectors are mated, their respec—
tive inner conductors are in electrical contact with each
other, for example as illustrated in FIGURE 5 by the
mating of the inner female conductor 19 of connector
10 and the inner male conductor 23 of connector 12.
As above indicated, the internal conductors are insulated
from their respective shields 18 and 22 by insulating
material 30 and 32 respectively. A like insulating con
In
' This invention relates to a shielded electrical switch. 10
dition exists in each of the connectors 14 and 16.
In one speci?c embodiment, the switch includes two
coaxial female connectors each of which has an aper
ture along its length for access therethrough to its re
spective inner conductor. These connectors are se
curely spaced apart so as to extend parallel to each
other, and a third electrical conductor extends there
betweeu. This third conductor is releasably held with
its ends in contact via the said apertures with the inner
conductors of the female coaxial connectors. However,
either or both ends of that third conductor may be
taken out of contact with the respective inner conductor
by mating one or two male coaxial connectors with the
respective female connectors to overcome the bias on
the third conductor end or ends. The third conductor
end is thereby substantially removed from its aperture
and the shield of the mated male connector is of su?i
cient length to close that aperture completely.
Numerous uses and advantages of this invention will
be apparent from this speci?cation. ‘In general, the
switch is a normal-through, shielded jack which pro
vides very low cross-talk and noise pickup. It also
provides good surge impedance characteristics up to the
ultra-high frequency range, due to the separate shield
ing and isolation of all active conductors and the physical
con?guration which results in very low coupling.
An object of the present invention is, therefore, the
provision of an improved shielded switch.
each instance, the insulating medium between isolated
switch or relay contacts (inner conductors) and the
associated shield or neutral conductor prevents the
grounding or shorting to ground of either of the isolated
contacts.
From the foregoing, it will be apparent that the
speci?c embodiment of this invention is illustrated as
a coaxial type switch, in that each of the connectors
10—16 is a length of rigid coaxial connector. Con
nectors 10 and 14 may generally be referred to as co
axial “jacks,” while connectors 12 and 16 are referred
to as coaxial “plugs.” As may be noted particularly
in FIGURE 6 which illustrates the switch situation when
plugs 12 and 16 are removed from their respective jacks
10 and 14, the internal connectors 19 and 21 of jacks
10 and 14 respectively, are shorted by an electrical
bridging, and preferably substantially non-?exing, con
ductor 36 which extends transversely therebetween
through a sleeve 38 of insulating material, for example
plastic. As illustrated, sleeve 38 does not extend the
full length of connector 36 but leaves the ends thereof ,
exposed for respective engagement with inner connectors
19 and 21. At the ends of sleeve 38 are respective
insulating arms 40 and 42, also of plastic for example,
each of which is pivoted on conductor 36 and inde
pendently pivotable on a shaft 43 extending between
and secured in the upstanding ends 44 and 46 of a
A further object is the provision of a switch of the
U-shaped bracket 43, which in turn is secured in any
shielded male-female connector type with the added
desired
manner to shields 18 and 20. Sleeves 50‘, 52
provision of an aperture in the length of one of those 40
and 54 around shaft 43 effect desired spacing of arms
connectors for receiving an electrical conductor biased
. 40 and 42.
into contact with the inner conductor of the apertured
In order for the bridging electrical connector 36 to
connector whereby mating of the connectors overcomes
be able to make contact at either one of its ends with
the bias, ‘breaks said contact, closes said aperture, and
the respective inner conductor of the associated jack, the
makes contact between the inner conductors of the male
shield of that jack is transversely slotted, for example
and female connectors.
as at 56 and 58 in shields 18 and 20 respectively. Fur
Other objects and advantages of this invention will
ther, in order for arms 40 and 42 to move the ends of
become apparent from the appended claims and the
bridging connector 36 into the slots or apertures 56 and
following description of the drawings in which:
58,
the jack shields are further slotted, this time longi
FIGURE 1 is a plan view of this invention,
50 tudinally as shown at 60 and 62. By virtue of spring
FIGURE 2 is a cross-sectional view taken along line
64- which is wrapped around sleeve 52 with one end
2-2 of FIGURE 1,
pushing against bracket 48 and the other against a
FIGURE 3 is an elevational view taken along line
grooved central collar on sleeve 38, the ends of bridging
3-3 of FIGURE 1,
connector 36 are releasably held or biased into contact
FIGURE 4 is a front elevational view,
55 with the inner conductors 19 and 21 to effect a short
FIGURE 5 is a longitudinally cross-sectional view of
ing condition therebetween when plugs 12 and 16 are
the upper half of FIGURE 1, and
removed. On the other hand, when either one of plugs
FIGURE 6 is a cross-sectional view similar to FIG
12 and 16 is inserted, consider plug 12 for example, the
URE 2 but without the male connectors inserted.
‘In the speci?c embodiment illustrated in the draw 60 forward edge or mating end of male shield 22 comes
into contact with the underside of the respective arm
ings, in which like numbers in di?erent ?gures designate
40, and pushes that arm upward and substantially out
like parts, the switch is comprised of four longitudinally
of
its longitudinal aperture 60. This of course breaks
extending electrical connectors 10, 12, 14, and 16. In
contact between connector 36 and inner conductor 19.
each instance, these connectors include a shield insula
tively surrounding an internal conductor. For example, 65 Furthermore, it moves that end of connector 36 substan
tially out of its transverse aperture 56, and shield 22
as shown best in FIGURES 2 and 6, the female con
moves on forward to completely close both the trans
nectors 10 and 14 respectively have external shields 13
verse and longitudinal apertures 56 and 60. In other
and 20 surrounding their respective inner conductors
words, arm 40 is responsive to the mating end of shield
19 and 21, while the mating male connectors 12 and 16
respectively have external shields 22 and 24 surround 70 22 whlie plug 12 is being inserted, to overcome the bias
of spring 64 and cause connector 36 to be disengaged
ing their respective inner conductors 23 and 25. The
from
the inner conductor 19. At the same time how
associated inner conductors may be of the male-female
ever, unless male plug 16 is also inserted su?iciently
3,036,169
3
What is claimed is:
into jack 14 to break contact of the other end/of con
nector 36 and inner conductor 21, that end of connector
36 remains in contact with conductor 21 due to the bias
4
-
'
1. An electrical switch comprising a ?rst longitudinally
extending connector including a ?rst electrical conductor
and a ?rst shield insulatively disposed around said con~
ductor, said shield having an aperture disposed in its
length for access therethrough to said conductor, an elec
trical contact releasably held in engagement with said
conductor through said aperture, and means, comprising
a second longitudinally extending connector which in
ing effect of spring 64.
It is therefore apparent that plug 12 may be inserted
alone to disengage connector 36 only from the inner
.conductor 19 and effect connection between that inner
connector and the inner connector 23 of plug 1-2, or
alternatively, plug 16 may be inserted alone to effect
a second electrical conductor and a second shield
connection of its internal conductor with that of jack 10 cludes
insulatively disposed around said second conductor and
14 while breaking contact between connector 36 and
matable with said ?rst shield sufficiently to cause contact
inner conductor 21, but not inner conductor 19.
If de
between said ?rst and second conductors, for disengaging
sired, both plugs may be inserted simultaneously or be
said electrical contact from said ?rst conductor by mov
in an inserted position concurrently, in which case the
bridging connector 36 is completely out of contact with 15 ing said contact substantially out of said aperture and
causing said aperture to be closed by said second shield
any of the inner conductors. In any case, the complete
when said ?rst and second conductors are in contact.
. 2. An electrical switch as in claim 1 wherein said ?rst
insertion of a plug causes the apertures which are in the
length of the shield of the jack in which the plug is
inserted, to be completely closed by the shield of the
' inserted plug.
and second shields are respectively of the male and female
20
Since the inactive or disengaged end of conductor 36
is removed from the shielded enclosure with the aper
tures therein being closed by the inserted plug, coupling
and impedance variations as Well as stray pickup, are
reduced if not completely eliminated. In particular, ca
pacitive coupling is substantially eliminated between con
ductor 36 and the'inner conductor from which it is dis
connected, by the insertion therebetween of a neutral
type.
‘ 3. An electrical switch as in claim 1 wherein in each
of said ?rst and second connectors is a coaxial connector.
4. An electrical switch as in claim 1 wherein said elec
trical contact is substantially non~?exible, is disposed trans
versely to the said ?rst conductor, and is one end of a third
electrical conductor, the other end of which is terminated
in a predetermined manner.
» 5. An electrical switch as in claim 1 wherein said
means includes an arm pivotally disposed on said ?rst
conductor or potential barrier such as the male shield.
By virtue of conductor 36 being at 90° relative to either 30 shield for pivoting said electrical contact into and out of
of the inner conductors 19 and 21, inductive coupling
therebetween is eliminated.
Preferably, the center conductors, for example 19 and
said aperture, and including means for biasing said elec
trical contact into engagement with said ?rst conductor,
said arm being responsive, to the mating end of said sec
ond shield while the shields are being mated to overcome
23, make contact after the cross conductor 36‘ breaks
the bias effected by said biasing means and pivotsaid elec
contact with conductor 19‘, though this switching arrange CO CH trical
contact substantially out of said aperture.
ment may be reversed if desired. Considering one half
6. An electrical switch comprising a ?rst longitudinally
of the dual switch, for example jack 1t} and plug 12, it
extending connector including a ?rst electrical conductor
will be apparent that the end of connector 36 not asso
and a ?rst shield insulatively disposed around said conduc
ciated with that half is terminated in a predetermined
tor, a second longitudinally extending connector including
manner, speci?cally in contact with center conductor 21.
a second electrical conductor and a second shield insula~
Of course, the outer ends of the plugs and jacks may be
' tively disposed around said second conductor, said shields
?tted as desired tov make connection to ?exible or other
rigid shielded connectors as desired. Also, a friction
being matable and longitudinally movable relative to one
another to make and break contact between said ?rst and
second electrical conductors, said ?rst shield having an
aperture disposed in its length for access therethrough to
said ?rst conductors, a third electrical conductor having
may be shielded, as indicated by the shielding can box
one end biased into contact through said aperture with
66, one end 68 of which may be secured to jacks 10 and
said ?rst conductor, and means, operable in response to
14 with the rest of the box being such as to slide over
relative movement of said shields toward each other for
the left (FIGURE 1) ends of jacks 1t) and 14 to com 50 purposes of making contact between said ?rst and second
plete the enclosure.
.
electrical conductors, for moving said one end of the third
The switch of this invention has many uses as will be
electrical conductor substantially out of said aperture to
appreciated by those skilled in the art. For example,
allow said second shield to close said aperture when the
and Without limitation intended, two such switches may 55 shields are mated and the ?rst and second conductors
be employed on either side of a circuit component, say
are in contact.
an ampli?er, with the plugs normally removed. Then,
7. An electrical switch as in claim 6 wherein said means
whenever a quick substitution for that component is de
includes an arm pivotally disposed on said ?rst shield for
sired for any reason, a plug which is connected to the
pivoting the said one end of said third electrical conductor
input of a substitute component is inserted in the ?rst
60 into and out of said aperture, said arm being responsive
in-circuit jack and a plug whichis connected to the output
to the mating end of said second shield while the shields
of the substitute component is inserted in the last-in
are being mated to pivot said one end of the third elec
latch (not shown) may be employed with the mated
shields for example, to prevent accidental disconnect.
If desired, the overall switching area of the switch
circuit jack, thereby completing the substitution and
allowing the circuit to operate via the substituted com
ponent.
Thus ‘it is apparent that this invention successfully
achieves the various objects and advantages herein set
trical conductor substantially out of said’ aperture'
8. An electrical switch comprising a ?rst longitudinally
65 extending connector including a ?rst electrical conduc
tor and a ?rst shield insulatively disposed around said
conductor, a second longitudinally extending connector
including a second electrical conductor and a second
forth.
Modi?cations of this invention not described herein
shield insulatively disposed around said second conductor,
will become apparent to those of ordinary skill in the 70 said shields being matable and longitudinally movable
relative to one another to make and break contact between
art after reading this disclosure. Therefore, it is intended
said ?rst and second electrical conductors, said ?rst shield
that the matter contained in the foregoing description
having an aperture disposed in its length for access there
and the accompanying drawings be interpreted as illus
through to said ?rst conductor, a third electrical conductor
trative and not limitative, the scope of the invention being
75 terminated at one end in a predetermined manner with its
de?ned in the appended claims.
5
other end being disposed so as to be movable into and
out of said aperture, and means for releasably holding
the said other end of said third conductor in said aperture
and in contact with said ?rst conductor, said means being
responsive to said second connector, during relative move
ment of said shields toward each other for purposes of
making contact between said ?rst and second electrical
conductor, to break contact between said other end and
said ?rst conductor and to move said third electrical con
6
the third connector is substantially removed to be closed
by the respective one of the fourth and ?fth shields.
10. An electrical switch as in claim 9 wherein the ?rst
and second connectors are of the female type, and the
fourth and ?fth connectors are of the male type.
11. An electrical switch as in claim 9 wherein said ?rst,
second, fourth, and ?fth connectors are of the coaxial
type.
12. An electrical switch as in claim 9 wherein said
ductor substantially out of said aperture, said second shield 10 means further includes two arms pivotally disposed re
being of su?icient length to close said aperture for pro
spectively on said ?rst and second shields for independent
viding complete shielding of said ?rst and second con
1y holding opposite ends of said bridging third connector
ductors, when they ‘are in contact, by said ?rst and second
for movement of those ends into and out of said apertures
shields.
respectively, and including means for biasing said ends
9. An electrical switch ‘comprising ?rst and second 1on 15 of the bridging connector into engagement with said ?rst
gitudinally extending connectors transversely spaced apart
and second conductors, said arms being responsive to the
and respectively including ?rst and second electrical con
mating end of the respective fourth and ?fth shields while
ductors with respective ?rst and second shields insulative
those shields are being respectively mated with said ?rst
ly disposed around said conductors, each of said shields
and second shields, to overcome the bias effected by said
having an aperture disposed in its length for access there 20 biasing
means and pivot the respective end of the bridging
through to the respective said conductors, a third electrical
connector out of the respective said aperture.
connector extending substantially transversely from said
?rst to said second connector and releasably held in en
References Cited in the ?le of this patent
gagement through said apertures with both of said con
ductors to e?ect bridging therebetween, and means, com 25
UNITED STATES PATENTS
prising fourth and ?fth longitudinally extending connec
1,046,227
Seemann ______________ __ Dec. 3,
tors respectively including fourth and ?fth electrical con
1,047,744
Bundy ______________ __ Dec. 17,
ductors with fourth and ?fth shields respectively and in
1,162,996
Farrel'ly et a1. ________ __ Dec. 7,
sulatively disposed around said fourth and ??th conductors
Schmitt ______________ __ Feb. 23,
for respectively mating with said ?rst and second shields 30 2,312,002
FOREIGN PATENTS
su?‘iciently to cause contact between the ?rst and fourth
and between the second and ?fth said conductors, for
12,452
Great Britain _________ __ July 26,
substantially removing said third connector from either
of 1909
of said apertures and causing each aperture from which
696,687
Germany ____________ __ Sept. 26,
1912
1912
1915
1943
1910
1940
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