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Патент USA US2123631

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July 12, 193s.
Filed July s, 1955
3 sheets-sheet 1
July v12, 193s.
med July e, 1955
3 Sheets-Sheet 2
` July 12, 1938.
Filed July 8, 19.35
3 Sheets-Sheet 3
Patented July 12, -1938
Charles H. Kuehler', Chicago, 1u.
Application July s, 1935, serial N0.'3o,zs3
' 14 Claims.
(C1. 173-328)
such use and produces a high-grade efficient con
This invention relates to electrical connecters,
and more particularly is directed to connecters
providing a positive electrical connection between
two spaced contact terminals, and capable of
5 maintaining an equalized contacting pressure at
both contact terminals regardless of slight mis
alignment of _ the terminals.
tact device.
Also, because of its self-aligning ~
characteristics, the present invention is capable
of being employed in connection with the ter
minals of circuit breakers, if desired, since the 5
sockets or terminals of such"v breakers must be
self-adjusting and capable of maintaining equal
In my copending application, Serial No. 724,118, ized contact pressure upon the male contact plugs
ñled Mayfä, 1934, now Reissue Patent No. 20,608, with which the breaker terminals are engaged
when the breaker is connected in switch-closed 10
10 dated December28, 1937, I have disclosed a plug
and receptacle connecter lparticularly adapted _ position. It is to be understood, however, that
for connecting and disconnecting an electrical the invention is `not to be limited to these spe
circuit, havingy a `plurality ofv contact shoes ciñc uses, since the'broad features thereof are
applicable in various other iields.
mounted for universal movement about a ter
Other objects and advantages of the present 15
minal stud and adaptedto engage about a con
tact stud carri`ed\,byÁ amovable closure member. invention Vwill appear more fully from the fol
lowing detailed description which, taken in con
The present invention; in Vits preferred em
junction with the accompanying drawings, will
disclose to those skilled in the art the particular
bodiment, is directed tov af'similar connecter
mounted on a ñxed terminal stud which is con
nected to a second spaced contact terminal by
means of an extending connecter having substan
, tially floating engagement therebetween.
accommodates any slight misalig'nment between
the terminals. Engagingeach of ’the terminals
is a plurality' of contact shoes having substan
tlally universal movement about .the termina‘ls
and normally urged .under spring pressure against
the terminals' andalso >against the connecter.
An object of the present invention is to pro
3f) vide a connecter fory electrically connecting two
spaced s contact'. terminals,` which connecter has
relative ñoating engagement between .the ter~
minals to accommodate slight ,- misalignment
construction and operation of a preferred form 20
of the present invention.
In the drawings:
Figure v1 fs an elevational view, partly in sec
tion, of an electrical connecter embodying the’
l present invention;
i _ Figure’Z is an enlarged plan view of one of the
Vterminal contact devices, taken substantially on
line 2--2 of Figure 1;
» ,
Figure 3 is a plan' view of a modiñed form
of contact structure;
` `
Figure 4 is a view, on a smaller scale, taken
through the structureV shown< in Figure 3, with
the connecter inserted;
Y `Figure 5 is a vertical sectional view through
» ¢
lAnother object o_f the. present invention 'is 4to a modifiedform of connecter; fj'
' Figure 6 is a plan viewI of amodiñed assembly
maintain equal Ácontactpressure between the ter- ~
minals and the contact shoes, and ebetween* the >of Contact shoes;
shoes and the-connecter. yThis :equalization of
obtainedby Áthe provisiony ofçxa yfull.
ñoating housing enclosing the shoes and biasing
the outer-ends ofthe springs associatedywith
each of the shoes, or by the provisionI of aninter
~ mediate spider'member having, arms upon which
the shoes are mounted 4for substantially universal
Another object Vof "th‘e present invention is the
Figure 7 is‘a‘xsectional view through‘fa-still
further modified type of~connecter; ‘
. Figure 8 `is -a vvertical sectional view through `4,0
a telescoping type ofy connecter` embodying rthe
principles of the present invention;
Figure 9 is a sectional viewstaken on
Figure 10 is a sectional View taken substantially 45
on Yline Ill-I0 of Figure 8; and \
MFigures 11 and 12 are sectional views of modi
elimination of spring means from any 'part'of
the electrical circuit- through the'contact" te#
y'fled types of contacts.>r
terially increased.
provided a pair of spaced terminal supporting 50
minals, -whereby theliíe‘ of thel springs'is ma- , ^ Considering now Figure 1 in detail, I have
connecter for connecting and disconnecting two
members 5 and 6, which membersare in the
'form of brackets having normally extending por
present invention ñnds particular application for
' In the Aprovision >of a disconnecting device or
spaced terminals, spacial requirements usually ` tions adapted to be disposed in substantial ver
demand a compact but sturdy construction. The tical alignment. The brackets 5 and 6 may be
through any suitable
connecting 55
2,123,631 '
means to a source of current supply.
Each of
the brackets 5 and 6 has extending therethrough
a contact terminal, indicated respectively at 1
tion 26, which contacting portion is adapted to
have equalized pressure contact upon the lateral
surface of a connecting rod 21, which rod is
and 8. The contact terminals are held in ñxed formed of a suitable metal member having a
position by means of flanged collar portions en > relatively high degree of conductivity, such as
gaging one surface of the bracket arms 5 and 6 copper or the like, the rod'21 being of sufficient
and having threaded nut members, such as the length to have its head portion thereof, indicated
hexagonal nut members 9, threaded over the ex
at 28, comprising a substantially spherically
tending portions of the studs 1 and 8.
formed head portion guided by the inclined sur
Each of the studs 1 and 8 is provided with an faces I6 of the shoes I4 into the substantially cy 10
enlarged rounded head portion I0 and I2, respec
lindrical opening defined within the inner sur-`
tively, which head portions are joined to the faces of the shoe members Il to provide for con
flange portion of the stud by means of a reduced
‘ neck portion.
tact between the shoes 20 and the shoes I4.
The connecting member or rod 21, at its upper
end, is mounted within a suitable insulating han 15
ture indicated generally at I3, comprising a plu
die member 29, or may be carried by any other
rality of contact shoes I4, preferably six in num
suitable operating mechanism for projecting it
ber in the illustrated embodiment of the inven
through the stud 8, which stud is provided with
tion, although it is to be understood that any a cylindrical axially extending opening 30 adapt
20 desired number of contact shoes may be provided.
ed to receive the rod 21, and throughv the cylin
These shoes are internally recessed atl one end, drical opening formed in the contact shoes 20 20
as shown at I5, to engage about the head portion downwardly into engagement within the opening
of the stud 1, whereby substantially ball and formed by the shoes I 4. It will be noted that the
socket engagement of the shoe members I4 about rod 21 has relative telescoping engagement with
25 the head portion I0 of the s_tud 'I is provided.
respect to the stud member 8, and the contact
At their opposite ends, the shoes Ilare pro- ' between the stud member 8 and the rod 21 is pro
vided `with inwardly extending tapered surfaces vided by the engagement of the inwardly extend
I6, defining an inwardly tapering circular open
ing portions 26 of the contact shoes 28 with the
ing for receiving a connecting member. y The ex
surface of the rod. This provides a wiping
30 ternallateral surfaces of the shoe members are
contact of these portions of -the shoe members w .
. provided with recesses. I1 as shown in Figure 1,
along the surface of the rod, whereby clean and
which recesses are tapered to receive the small positive pressure contact of the shoe members
ends of helically coiled spring members I 8, which with the rod is provided.
spring members, at their inner ends, bea-r against ‘ Since the shoe members 20,- at their opposite
35 the shoe members I I to urge the same into equal
ized contact pressure about the head portion I8 ends, have pressure contacting engagement with se
of the stud 1, and at their outer ends are biased the head end I2 of the stud, which is connected
against the defining walls of an enclosing housing to the _contact` supporting bracket 6, it is appar
member I9 which is preferably polygonal in shape, ~ ent that the rod 21 is in proper equalized pressure
contact with the bracket 6 _so that‘current may
40 having as many sides as there are shoe members _
transmitted from the bracket 6 through' the
in the present embodiment of the invention, be
being in the form of an hexagonal tube extending rod 21 with a minimum of resistance.
It will be noted that the upper end of the stud
axially ofthe stud member 1. This member I9 8 is
with an outwardly flaring opening
may be formed of insulating material Aif desired. 32 soprovided
that the head end 28 of the rod 21 may be.
Thus a full-floating self-aligning contact re
ceiving structure I3 is provided about the head. readily guided into the interior of the stud m‘em 45
The stud 1 is provided with a contacting struc
, portion ~I-Il of thestud, which has substantial- uni
ber 8 for telescoping movement therethroughA
4when it is-~desiredlto connect the contact brackets.
versa] movement about the stud 1. By reason „5
and 6.
of the springs I8, each of the shoe members has
Normally, when the rod has not been connected
the stud whereby equalized contact pressure of in position, the springs I8 bearing against tire
the structure I8 with the lateral surface oi’ the tubular sleeve member I 9 will urge the upper ends
of the shoe -members I4 inwardly, and when the
stud 1 is provided.
end 28 of the rod is guided into the open
The head rportion I2 of the stud member 8 has
end of these shoe members along the tapered
55 engaged. therewith a plurality `of contact shoes .
surfaces Il, the shoe members are spread out
28. which shoes have recessed portions at one wardly
against the pressure of the springs I8 55
end thereof, -as shownat' 2_2, adapted to have whereby an equalized pressure contact of each of
beating» engagement about the rounded stud I2,
- whereby the shoes are supported for substantially the shoes upon the head endl! ofthe rod is
lâzi‘ver’lllfconjoint movement' about the stud head
28, in theiriaister-smfaces, are 're
It is _thus apparent vthat I have À provided `an
electrical connecter whereby the _ _ '
ceos'ed'fas 'shown at 23 tofprovide suitable> seating » 21 may_,be,._¿telescoped 'with respect’to one con
, 4.portions-for helically coiledsprings ‘24,'which
65 springs, at their outer ends. are biased against an
enclosing tubular polygonally shaped member 2l
corresponding to the member I8 of Figure 2.
'I'he shoes are thus resiliently maintained in pres
. sure contact about the head y portion I2 of the
stud 8, and are supported for floating movement
thereabout due to the fact that the sleeve member
tact studïand g/uided into >electrical contact en
gagement .witha second spaced contact stud, the
two contact studs having contact devices where-l
by the rod is supported substantially for float
ing movement between the two contacts, thus
accommodating- for any misalignmentÀ between
the contacts and providing an equalized contact
pressure about each ofthe contacts and about 70
25 does not extend up to the flange of the stud I the surface of the rod at each of _the contacts
and therefore floats about the head I2 with the>> regardless of variations in the alignment between
-shoe members. Each of the shoes 20 is also pro
these contacts. 'I'he opening 30l in the stud 8
75 vided with an inwardly extending contacting por
accommodates slight cooking of the rod 21 there
in when the studs 1 and 8 are not in exact align
In the embodiment of the invention shown in
Figures 3 and 4, the contact bracket 5’ has a con
tact stud 1’ mounted thereon by means of the nut
9’ threaded over the extending portion of the
stud, the head portion i0’ of the stud being
adaptedto receive a plurality of .contact shoes
35 having recessed portions 36 at `their lower
10 ends adapted to engage about the head portion
I0' of the contact stud 1’ whereby substantially
universal movement of the shoes with respect to
the stud is provided.
Thev shoes 35, at their upper ends, are pro
15 vided with outwardly flaring tapered surfaces
31 for guiding the end 28 ofA a contact rod or
connecting rod 21 into engagement within the
circular opening formed by the respective sur
faces of the shoes. Intermediate the head por
20 tion l0' of the stud and the position which the
head portion 28 of the rod 21 assumes with re
spect to the shoes 35, there is provided a spider
member 38 having a plurality of radially ex
tending arms 39. The arms are adapted to ex
tend through enlarged openings formed in the
shoes 35, and project outwardly of the external
periphery of the shoe members to the tapered
openings 40 formed in the shoe members. At
their outer ends, the arms 39 are adapted to
30 carry suitable cap members 42, which cap mem
bers provide for biasing the outer ends of the
helically coiled spring members 43 against dis
placement outwardly of the ends of the arms
39, while the springs 43 are biased at their in
ner ends against the base of the tapered open
ings 40. The shoes _are thus mounted for uni
versal movement about the stud-member 1', and
are held in their respective cooperating positions ,
by means of the spring members 43 mounted
40 about the arms 39 of the spider 38.
In this manner the shoes may move outward
indicated at 59, adapted to engage the head end
"66- of a .terminal stud' member 62 secured in any
suitable manner to a supporting bracket 63. A
suitable garter spring 64 engages the free ends
of the- spring fingers 58 for.urging them into
tight uniform pressure contact with the head
end 60 of the terminal 62.. The opposite end
of the contact socket member 56 is adapted to
receive the ball tip end 65 of a connecter rod
66 corresponding tothe connecter rod 21 of Fig» 10
ure 1, and the `spring fingers are inwardly
rounded, as at 61, to receive a circularly coiled
garter spring 69 for urging the fingers radially
inwardly to provide a uniform pressure contact
of each of the spring fingers 51 about the lateral
surface of the ball tip 65.
In this manner a
selfáaligning contact assembly is provided in
which uniform contacting pressure is produced
between each of the contact fingers andthe con
,tact terminal and contact rod.
In Figurek 5 I have disclosed a modified form
of connection, in which only two points of con
tact are required to effect electrical connection
between a pair of spaced contacts.
Referring in detail to the structure shown in 25
Figure 5, I provide a fixed contact Cmember 10,
having a normally extending arm 12 supported
upon a suitable supporting bracket 13. The con
tact member 16 is provided with a ball tip end
14, and is also provided with a longitudinally ex 30
tending central passageway 15 receiving the in
ternally threaded sleeve 16 which is mounted
therein and which has an extending end portion
projecting below the contact 10 and having a
bevel gear member 11 keyed thereto. The gear 35
11 ,is driven by a second gear member 16 sup
ported on a driving shaft 19.
The threaded shaft 16 is adapted to receive an
externally threaded shaft 80 which is recipro
cated within the passageway 15 by rotation of the 40
shaft 16, the shaft 89 having a suitable stop mem
ber 82 for limiting its downward movement with
in the passageway 15. The stop 62 slides in a
suitable keyway 83 formed in the passageway 15
to prevent rotation of the shaft 86 and to pro
vide for only longitudinal movement thereof.
ly to accommodate the admission of the head end
28 of the connecting rod 21, and an equalized
pressure of each of the shoe members against
the surface of the rod and against the surface
of the head portion I0' of the stud is provided.
The upper end of shaft 80 has a socket 86’ re
It is obvious that the maintenanceof equal
ized pressure and the'provision of a positive, high ceiving the ball end 8|' of a pin 8l mounted 'for
grade, eiiicient contact structure is provided with universal movement about the upper end of shaft
either the construction shown in Figures 1 and 2, 8U.
At its upper end, the pin 8l is provided with
where an enclosing polygonally shaped housing
is provided, or by the provision of a spider such a spider member 84 having radially extending
arms 85 passing through suitable openings formed
as shown in Figures 3 and 4.'
In Figure 6 I have shown a further modified in a plurality of contact shoe members or bars R..
form of contact assembly, in which a plurality 86,.,the outer lateral surface of the contact bars
of contact shoes 50 form a circular opening 62 - 86 being provided with tapered recesses ill re
ceiving the helically coiled spring members 68
into which a contact connecting member is adapt
ed to extend, and are held in position by means carried by the arms 85 and biased at 'their outer
ends against a stop plate 89 secured to the .outer y
of a coiled garter spring 53 engaged in a suit
ends of the arms. This provides for resilient
ery of the shoes 56. The shoes are provided, movement ofthe contact bars 86 inwardly and
at one end, with the inclined> tapered surface outwardly with respect to the spider 64, and also
55 for guiding a connecting rod into the socket provides for resilient and uniform contact pres
defined by the shoes. The garter spring 53 is sure of the bars against the ball tip end 90 of a
contact member 92 fixed at a predetermined dis 65
65 adapted to constantly urge the shoes toward each tance from the contact 10.
other, and radially inwardly toward the contact
The lower ends of the contact bars 66 are also> '
member, whereby equalized pressure of each of
provided with tapered recesses 93 formed in the
the shoes against the contact member is pro
outer ‘lateral surface thereof, which recesses are
adapted to receive helically -coiled springs 94 70
normally biasing the lower ends oi’ the contact
'resilient metal socket member 56, which is pro
vided at its opposite ends with slotted portions - bars into contact engagement 'with- thelball tip4 providing a plurality of spring fingers 51 and 14 of the contact 10. The springs are'maintained
in proper biasing position by an enclosing hous
56, respectivelyr The spring fingers 5,8 are'pro
vided with an enlarged arcuately curved portion
ing member 95 having suitably inset portions 96
forming spring seats for the springs-94. In this
for the lower end |09 4of a threaded shaft ||0,
manner the lower ends of the contact bars 86 are
which shaft at its-lower end is provided with a
biased inwardly into uniform contact engage lhelical gear ||2 having bearing within a suit
ment with the lateral surface of the ball tip 14. able supporting bracket member ||3. Suitable
Preferably, the inner contacting surfaces of the thrust washers ||4 are provided at opposite ends 5
contact bars 86 and the ball tips 'I4 and 90 of the of the gear |I2, and the gear is adapted to be
> contacts 'l0 and 92 are silverplated in order to
rotated by a second helical gear ||5 carried
reduce the resistance to passage of current there
within suitable bushings ||6 extending into op
_ posite ends of a' cylindrical'recess formed in the
In the operation of the structure shown in member ||3. Suitable graphite or other bearing 10
Figure 5, in the position shown in this ñgure the members ||'| are interposed between the ends
contact bars 86 have been moved upwardly to of the gear | |5 and- th'e bushings || 6, the bush
provide for contacting engagement between the ings ||6 being bolted into position by means of
contacts 10 and 92. When it is desired to dis
the stud bolts ||8 threading into the lateral
connect the ’electrical connection between4 these walls of the bracket ||3.
contacts, the shaft 19 is rotated by any suitable
The bracket ||3 is also provided with oppositely
driving means to effect corresponding rotation’ `extending flanged shoulders | I9,l which shoulders
of the sleeve 16. This results in threading of the are adapted to receive suitable stud members |20
externally threaded shaft 80 downwardly within securing the bracket ||3 to the portion |04 of
the passageway 15, and results in corresponding the member |03. It will be noted that the bracket
movement of the contact bars 86 due to their en
||_3 may be rotated through a limited arc with
gagement by the arms 85 of the spider 84 secured respect to the member |04 in order to accommo
on the sleeve member, away from the ball tip 90, ’ date any slight misalignment between the mein-l . .
disconnecting the contact 10 therefrom. At the ber |04 and the shaft |22 which carries the gear
same time, the lower ends of the contact bars ||5. `
`are moved downwardly past the ball -tip 14 of
The .shaft |22 extends outwardly of the bush
the contact '|0 until the contact bars 86 assume ings | I6 and is provided with squaredend por
a position with the spider 84 disposed imme--- tions |23, one~of the end portions |23 receiving'
diately above the ball contact tip 'I4 of the con . a crank member |24 whereby the shaft |22 may
30 tact 10, with thelower ends of the contact bars be rotated in. opposite directions to produce cor
86 being disposed about the lower cylindrical responding rotation of the threaded shaft ||0.
portion of the contact 10. '
'I'he upper end of the Itubular member | 05 is'
This provides a suitable clearance between the provided with a rounded external bead |25, which ‘
contacts 92 and 10, and at the same time pro
bead is adapted to form a suitable contact sur
, .duces wiping engagement of the inner surfaces face engaged by a plurality of contact shoes |26
of the contact bars 86 across the ball contact' having arcuate inner surfaces engaging about the
tip 14, and also across the ball contact tip 90 when bead |25 at the lower end thereof. The contact
the bars are moved ‘upwardly into contact en-v
gaging position. This is extremely advantageous
40 in providing a clean and positive contact between
the ball contact tips and the contact bars, thus
reducing the resistance through the connection.
At the same time, the spring mounting -of the
contact bars 86 at their upper and lower ends
assures that uniform contact pressure of each
" of the bars upon the lateral surface of the ball
-contact tips '14 and 90 will be secured.
Obviously, the reciprocatory movement of the
contact bars 86 might be secured by other means
thanv the externally threaded shaft fitting in_to
Ul Cl
the threaded sleeve 16, and I do not intend to
limit my invention to this specific form of actu
ating mechanism, since a suitable plunger mem
ber might be employed for producing the same
mode _of operation. Further, even if a slight mis
alignment of the contacts 92 and 1.0 is present,
the resilient mounting of the contact bars 86
upon the sleeve 80 insures that such misalign
ment will be accommodated, and that no un
shoes |26 are also provided with concave recesses
-|21 for clearing the bead |25 -when the shoesv
are lowered. A plurality of spring members of 40
arcuate cross-section, indicated at | 28, are adapt
ed to engage in suitably notched portions of the
external surface of the members |26, being held
in position by means of a polygonal band |29
surrounding the shoes and connected with the
springs |28 by means of the adjustable threaded
pin members |30 which have suitable seating en
gagement in the arched portions of the spring
|28. This servos to urge the shoes |26 resiliently
into engagement -with the upper end of the tubu
lar member |05 and to >maintain equalized pres
sure between the shoes and the contact surface
of the member | 05.
The threaded shaft> ||0 is provided with a
spherical traveling nut |32 adapted to move up
wardly and downwardly on the shaft ||0 by
reason of the pin |33 guided in the keyway |34
formed in the internal surface of the member
| 05, whereby the nut |32 is prevented from ro
60 even contact pressure Will be produced thereby.
tation and threads upwardly and downwardly
the invention shown in Figures 8, 9 and 10, a
contact stud |00 is provided with an extending
threaded portion |02 receiving a support member
upon the shaft || 0 as the shaft is rotated.
» A suitable supporting sleeve |35 is providedat
its lower end with a ball socket portion |36 welded
or otherwise suitably secured thereto which en
Considering now„ in detail, the embodiment of
|03 threaded thereover and having a laterally
extending portion |04 which receives a hollow
metallic tube |05 threaded into a recess formed
in the portion |04 of the member |03.
Within the lower end of the tube y|05 there is
gages about the spherical surface of the traveling
nut |32 to provide for substantially universal
movement of the sleeve |35 about the member
| 32. The socket portion | 36 of the member |35
is suitably milled out as shown at |31 about the
provideda bushing |06 which has an annular pin |33 to provide for this universal movement
shoulder |01.seating on the bottom of the recess _ of the sleeve |35 about the traveling nut.
into which the tube |05 extends. The bushing
The upper end of the sleeve |35 is provided
|06 also has an extending cylindrical portion |08 with an annular disc-like member or spider |40
whichextends into a suitable recess formed in having a plurality of radially extending slots
the member |04. the bushing serving as a guide " milled into the outer surface thereof, which slots
» are adapted to receive radially extending blade
0r cam members |42, the members |42 extend
ing radially‘outwardly of the spider |40 and be
ing suitably welded or otherwise secured in- the
milled out slots formed in the outer surface of
the disc | 40. The upper ends of the shoe mem
bersl |26 are slotted, as indicated at |43, from the
end longitudinally to a point below the extend
ing arms |42 of the spider |40. Suitable leaf
spring members |44 are mounted in vertically
extending position on the external surface of the
shoes |26 by means of bolts |45 threading into
the shoes |26.
modate any misalignment which may be present.
'I‘his swings the shoes in unison therewith. Also,
by reason of the particular spring mounting dis
closed, equalized contact pressure of each of the
shoes against the stationary contact is provided,
and the wiping action of the shoes across the
contact surfaces serves to maintain these sur
faces clean and bright.
In Figure 11, I have shown a modified type
of contact structure in which two round ended
cylindrical contact members, |66 and. |62, are
adapted to receive therebetween a suitable con
tact sleeve formed of a plurality of contact shoes
|63. Each of the contact shoes is provided at
Retaining means |46 are carried by each of the
.opposite ends with inwardly beaded portions |64 15
|26 are supported upon the arms |42 by means `having substantially line contact engagement
about the external surface of the members |60
of the bearing of the spring members on the up
per edges of the arms |42. This provides for and |62, whereby circular line contact of the
resilient mounting of the shoe members upon shoes |63 with the external cylindrical surfaces 20
of the members |60r and |62 is provided. Suit
20 the spider |40, whereby the shoe members may
move radially inwardly and outwardly under the able tapered recesses |65 are formed in the ex
ternal surfaces of each of the shoe members,
pressure of springs |44 to be expanded or con
and receive helically coiled springs |66 seating
tracted, as desired.A
thereagainst and biased into position by means
A hollow contact sleeve |50, or any other de
of a polygonal shaped sleeve member |61 main
sired type of contact, is mounted in fixed posi
tion above the tube |05, and has an externally taining the shoes in pressure engagement with
the contacts |60 and |62. This provides for
enclosing insulating member |52 carried there
about and maintained in predetermined position equalized contact pressure of the beaded portions
|64 of each of the shoes against the contact sur.- n
with respect to the contact sleeve |50 by means
of the lock nut |53 bearing-against the lower faces.
end of the insulator |52 and threaded onto the
contact sleeve comprising a cylindrical member
contact sleeve.
In the operation of the construction shown in slotted longitudinally from the opposite ends in
Figures 8, 9 and 10, rotation of the crank |24 'Wardly past the central portion thereof, -the
serves to rotate the shaft ||0, causing the nut member |10 having slots | 12 extending from
| 32 to travel longitudinally of this shaft. This one end thereof which Aare alternately spaced
results in downward movement of the member with respect to slots |13 extending frtm the op
|35 from the position shown in Figure 8, which posite end thereof, the inner ends of the ad
results in drawing of the upper ends |43 of the jacent -slots overlapping', as shown. The sleeve
shoes |26 downwardly out of engagement with is adapted to fit over the rounded tips |14 and 40
|15 of a pair of contact studs |16 and |11, re-_
the contact end of the sleeve |50, thereby break
spectively. Due to the slotting of the sleeve |10,
ing contact between the contact |50 and the con
the fingers formed by the slots |12 and |13 are
tact |00. This downward movement is accom
modated by means of the recessed portions |21 resiliently maintained in pressure engagement
oi.' the shoes |26 which ñt around the beaded with the surface of the ball contact tips |14 and 45
portion |25 -of the tubular member |05. The |15, thereby maintaining a substantially equal
traveling nut |32 can move downwardly upon ized contact pressure about each- of these con
the shaft ||0 until the spider |40 rests upon the tact tips. The sleeve |10 or the contact as-`
sembly comprising the shoes |63 of Figure 11
upper surface of the tubular member I 05. Inas
much as the normal external diameter of the may be reciprocated with respect to the contacts
tubular member |05 is substantially less than the in any desired manner to provide for closing and
opening of the circuit therebetween.
beaded portion |25 thereof, or the external di
It is therefore believed apparent that I have
ameter of the contact sleeve‘l50, the shoes will
be expanded against the pressure of springs |28 provided an electrical connecter adapted for use
in situations in which contacts may be slightly
55 and |43 when in the position shown in Figure 8. misaligned, and which provides for the main
Consequently, upon» downward movement, the
shoes will contract, but cannot contract inwardly tenance of equalized contact pressures and» for,
beyond the external diameter of the member the floating support of the contact member be
|40 or the external >diameter of the member |05. tween the spaced contacts.
Having described my invention in accordance 60
with the patent statutes, what I claim as new
position, the upper ends |43 thereof are con
and desire to secure by Letters Patent is:
tracted to a slight extent by reason of the pres
1. In an electrical connecter, a pair of spaced
sure of springs |44. so that upon upward move
ment into switch closing position, the shoes will Contact studs, a full-floating contact structure
mounted for universal movement about each of
be spread radially as they come into engage
said studs, one of said contact structures Lbeing
ment with the contact sleeve |50 due to the up
wardly and outwardly flaring end portions |43 adapted to receive a connecting member Aendvvise
thereof, so that any slight misalignment of the therethrough, and a connecting member mov
contact |50 and the tubulare member |05 will able endwise' through said one contact structure
be accommodated by the swinging movement of into the other of said contact structures and 70
70 the sleeve |35 about the traveling nut |32, the having floating engagement between said con
sleeve having substantially universal movement tact structures. ,
2. In an electrical connecter, a pair of spaced
about this nut so that as thecontact shoes are
guided into engagement, the sleeve may rotate contact studs, each of said studs having a spring
controlled contact structure mounted for uni
about the nut in any desired manner to accom
versal movement thereon, one of said contact extending outwardly of said studs, the shoes for
studs being adapted to receive a contact mem
one of said studs defining an outwardly ilaring
ber endwise therethrough, and a contact mem
cylindrical opening, the shoes for the other stud
ber movable endwise through said one contact having inwardly extending contacting portions atstud and into engagement between said contact their free ends, and a contact member movable
structures to eiïect electrical contact between endwise through said one contact stud into said
said studs through said structures.
opening and within said contacting portions for
3. In an electrical connecter, a pair of spaced iloating support between said studs.
contact studs, a plurality of contact shoes for
9. In combination, a pair of spaced contact
10 each of said studs, means for maintaining the
studs having rounded head portions, one of said 10
shoes for each of said studs in equalized pres
studs being adapted to receive a rod-like member
sure contact with said respective studs, one of endwise therethrough, a plurality of contact
said studs being adapted to receive a connecting shoes for said one of said studs having ball and
member endwise therethrough, and a connecting socket engagement at one end about the head
15 member movable endwise through said one stud
portion of said stud and having inwardly extend
into engagement between the respective shoes of ing contacting portions at the opposite end. 15
each of said studs for effecting contact there
spring means intermediate the ends of said shoes
4. In an electrical connecter, a pair of spaced
20 contact studs, one of said studs being adapted
to receiv'e a connecting member endwise there
through, a plurality of contact shoes for each
of said studs, means for maintaining the shoes
for each of said studs in equalized pressure con
25 tact with said respective studs, said means com
prising an enclosing housing for said shoes hav
lng spring means biased between the interior of
said housing and each of said shoes, and a con
necting member movable endwise through one of
30 said studs into engagement between the re
spective shoes of each of said studs for' eiïect
ing contact therebetween.
5. In an electrical connecter, a pair oi.' spaced
contact studs, one of said studs being adapted
35 to receive a connecting member endwise there
through, a plurality ofcontact shoes for each of
said studs, means for maintaining the shoes for
each of such studs in equalized pressure contact
with said respective studs, said means for one
of said studs comprising a spider member hav
ing radial arms receiving said shoes and spring
means urging said shoes fcentrally toward said
spider member, and a connecting member mov
able endwise through the other of said studs
into engagement between the respective shoes of
each of said studs for eiïecting contact therebe
urging said shoes together, a plurality of corre- `
sponding contact shoes mounted at one end
about the head portion of the other stud and 20
having outwardly ñaring surfaces at their oppo
site ends, corresponding spring means for said
second plurality oi' shoes, and a rod-like member
movable endwise through said one stud and the
contacting portions of said first plurality of shoes 25
and guided at its opposite end by said flaring
surfaces into contact within said second plurality
of shoes.
10. In combination, a ñrst terminal stud adap't
ed to receive a _connecting member endwise 30
therethrough, contact shoes mounted for uni
versal movement thereabout and extending out
wardly of said stud, a second terminal stud, con
tact shoes mounted for universal movement
about said second stud and extending outwardly 35
toward said ñrst stud, a connecting member
movable endwise through said ñrst stud and be
tween said contact shoes carried thereby into
engagement within the contact -shoes carried by
said second stud, and means for equalizing the 40
contact pressure between each of said-shoes and
the corresponding studs and between said shoes
and said connecting member.
11. In combination, a pair of spaced contact
studs, contact shoe structures mounted for uni 45
versal movement about each of said studs and
`Iextending toward each other, one of said studs
6. An electrical connecter comprising a ñrst having an axial passageway therethrough, and a
terminal stud having a rounded head portion contact rod movable through saidv passageway
and adapted to receive a contact member end
and having a ball tip portion engageable in the
wise therethrough, a plurality of contact shoes contact shoe structure of said other stud.
mounted for conjoint universal movement about the contact shoe structure of said ilrst stud
said head portion and deilning a contact-re
engaging about the lateral surface of said rod
ceiving opening, a second terminal stud spaced as it is moved into engagement with the con
55 from said ilrst stud and having contact shoes tact shoe structure oi’ said other stud.
mounted for conjoint universal movement there
, 12. An electrical connecter comprising, in com- 4
about, and a contactv member movable endwisel bination, a pair of spaced apart contact mem
and axially of said ñrst terminal stud into en
bers having convex spherical contact portions, a
gagement in said opening and with said contact polygonally shaped' support member disposed
shoes of said other stud.
substantially coaxially with said contact mem
7. An electrical connecter comprising a pair bers, a contact shoe individual to each inner side 60
» of spaced terminal studs having rounded head
portions, a plurality ofcontact shoes mounted for
universal movement about each of said head por
tions, one of said studs having an axial opening
therethrough, and means movable through said
1 opening and into engagement between the re
spective contact shoes of each stud for eil'ecting
electrical connection between saidl studs.
8. In combination, a pair Vo1' spaced contact
studs, supporting brackets for each of said studs,
>said contact studs being adapted to receive a
contact member endwise therethrough, a plural
ity of contact shoes having substantially uni
versal movement about each of said studs and
of said polygonal support member and arranged
and adapted to interconnect said contact mem
bers by contact engagement with said convex
spherical contact portions thereof, and resilient 65
means acting between said support member and
said contact shoes for biasing them inwardly in
to contact engagement with said convex spher
ical contact portions oi' said contact members.
13. An electrical connecter comprising, in 70
combination, a pair of spaced apart contact
members having convex spherical contact por
tions, a polygonally~ shaped support member dis
posed substantially coaxially with said contact ,
members, a contact shoe individual to each in
ner side of said polygonal support member and
arranged and adapted to interconnect said con
tact members by contact engagement with said
convex spherical contact portions thereof, means
preventing detachment of said contact shoes
from one of said contact members, said contact
shoes being readily detachable from the other of
said contact members, and resilient means in
dividual to each of said contact shoes and acting
between the same and the side of said polygonal
support member individual thereto for biasing
said contact shoes inwardly into contact engage
ment with said convex spherical contact portions
of said contact members.
14. In an electrical connecter, a pair of spaced
contact members. one of said contact membersA
being adapted to receive a connecting member`
endwise therethrough, an assembly of contact
ñngers for each contact member, a connecting
member movable endwise through said one con
tact member into engagement with the respec
tive assemblies of contact iingers for effecting
_contact therebetween, and resilient means for
maintaining equalized contact pressure between
said assemblies of contact ñngers, spaced con
tact members and connecting member for pre
determined positions of misalignment of said
spaced contact members.
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