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Патент USA US2137077

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' 4DIsc'oNNEcT swl'rcnv
Filed April 16, 1936
s sheets-sheet 2 ~
l ///
Patented Nov. 15, 1938
4Westinshoiue Electric?sz » lilnnufactui'ing'` Com
_ pany, #East Pittsburgh,
1 Y Pennsylvania
implication’A aprirla, isssgserisl No. 54,108 ¿f l
15 Gummi.l (CL 20114-48)
My., invention relatesftofelectrical `switching ‘ insulator and the ‘other'endoi which isconnected i»
equipment and particularly to ,high voltagedis'-l ` ` f to the unitary* blade'member adjacent the _ un
connecting switches. - ß
'_suplaortiàdexidfthereof.` rDuring the operation oi'
i „Devices of this type are utilized' primarily >for _’ 4the switch, the unitary blade element is'swung
interconnectingV and for isolatingportions‘of a‘ into engagement withthe stationarycontact. y‘By
high'voltage transmission or other power distri
this'operation the -cooperating‘toothed members
_ bution system,V and in tliislservicei’lare slûàjecte'd to n ` are causedto'engage each îother, therebypme#
a number» ofw veryÍ exacting.v operational require-` j chani'cally- interconnecting the rotatable insulator
and the stationary insulator; Alost'motioncon
In the interest 'of safety, it is practically vi'rnp'era- ` - nection intermediate the` unitary `blade and the
tive that disconnectingl’switches shall sl'ioyfxr- fa visi- _Y rotatable insulator-allows the further rotation of
i ments, some‘oiwhich are conñictin'g'in nature. ’ “
» yble breaksin’the controlled _circuit`when‘in- the Y' that insulator,- which v'rotation causes the articu
open position. 'Ordinarily this' means" that 'the> lated -blade element gto". be moved longitudinally
devices must be air breakÍsWîtches. and as a, result, ‘andy-at the‘s'ame" timefl'aterallywith respect to the
the switches are subjected'to all types of weather funitarybladel- element. ‘ The combined4 result of 15
conditions. vDisconnecting'switches are operated l l'this _i«.">ngitudinal:andl lateral’movement is to pro
but; infrequently, yet when called _upon the‘y‘must' videìfahigh pressure wiping engagementbetween
‘4 the cooperating portions of the _blade elements
spite corrosion,
iceA or sleet yforxnation,“‘orfòther
[and the-contact meana
20 conditions.. Further,`,thedevice_s should be‘auto- " A further object of the-‘present invention to
be Vcapable ~ of ,y opening the` controlled _circuit‘de- ‘
\ matically‘capable ofcutting through oxidation
'generally `simplify the structure ,of _switches o'f
t tand corrosion inïorder to assure _low- resistancejj" "this typeby reducing the:.number„oi; partsjre- _
.contacts throughout' their operative jlives.` " As ,quiredv to the minimum'and_toxincrease there
opposed to these operational requirements, com - liability in operationfof‘thestructures. . ~
mercially successful disconnecting switches must , Other‘objectswill be apparent in the iollowing '
« Abe relatively low in- costidue tothe large numbers' 'description Í‘ofthe’ -two preferred-.embodiments of
1 which ,are used on even a small ‘ transmission ` ythe invention; ' Referring totthe drawings,
Figure 1 lis a side elevationalfview'of a three
insulator side f break disconnecting vswitch _utiliz
_ The principal; objectief. the presentinvention,
therefore, is ,to provide a simple, reliable disconá"
` ing the features ofthe presentinvention, \
Fig. 2 is a plan view'ot the structure, shown in
necting switch. which -shall be capable of'` satis
factorilymeeting the _above stateclb` requirements', 'l
i -~ The particular structure'` utilizedfor 'accomplish-> ‘ `rFig.; 3 is an enlarged fragmentary Dian _view
ing this object ofthe invention is an improvement f similar to Fig. 2, showing they switch ¿in the> par
and» a further refinement of the 'switch disclosed
Fig. 4 is a Iragm'entary'elevational view-,sinnlar‘
,in my Patents Nos. 2,039,059 and y2,067,659 issued
_ _April 2s, 193s, and January 12,1937, resoecuvelygf toQFiggïl." showing-î'th'e‘.relativellpositlon of,- the _
„ The present device diners from thestructures -_blade elements _and the " cooperating stationary
shown in thosepatent'sin that `it is> a side
40 `breal: switch, either of _the vtwo insulator ori'of the
tiall‘ygopen position,
‘ ~
,Contact .when the switeh 'is 1n the fpartiauy. open
three -insulator .type,_an`d_ in' applying the'princi- ` 1 '»Fig.` 5 isafragmentarysectionalview showing
y ples disclosed in "the"` above-‘mentioned patents the. details of the lost- motion lconnection , between
to a side‘breakswitch I’accomplisha‘nother or the .the unitary blade elementV and the rotating'1nsu_ _
objects of myfinvention;`
The present inventic‘mny as 'dol'thestructures
patents,` utuizes
111g. 61s ¿fragmentary secnonai viewî showing
` " parallel blade construction., vOne of the blades is ' ' the details 0f the Cooperating contact portions of ~
l a'.unitary„memberyhich' isfprovide'd îwith a
the ’stationary` contactfmeans and the blade- ele..
toothed portion for‘engaginga similar toothed(
portion forming a part'of the stationary contact‘
Fig. -7 is a side `elevational view similari` toFig. yl g
means in .order to permittl'ie `mechanical inter-l
connectingv of the rotatable insulatonand the* oi a two insulator. sidev break switch embodying
stationary contact means >andthe other blade
the vfeatures in the present invention, " _. ¿
Ymember comprises an articulated jblade element,-‘_ ~» î"1'°‘ig. 8 is a plan view ofthe» switch `shown in
lonelend of which is connected to thejrotatable f ¿Fig 7; and ’
unitary blade element n by a pair or ne
.line> Y the
links 21. one end of each of these links being
pivotally joined to one ofthe members by suit
The three insulator switch illustrated in Figs'. 1 ,
Fig. 9-is a sectional view taken on
through 6, inclusive, includes a base i which'is
preferably formed from a piece of channel iron.l
a pair of stationaryinsuiators 2 mounted on said
base through the use' oi' a pair of suitable spacers
3, and a rotatable insulator l mounted on the
base intermediate the two stationary insulators.
10 A ball bearing connection 5 permits the rotatable
insulator I to be moved freely with respect to the
base. A stationary contact assemblage 'I is sup-'>
ported upon each of the stationary insulator col
able pivot pins.
It will thus be seen that the blade assemblage
comprises in effect one substantially rigid blade
’ ement which isg'provided with toothed` portions
-for engaging'the toothed portions of both of the
two contact jaws and a pair of articulated blade
» elements fastened at their inner end to' the ro 10
tatable insulator column and fastened at their
outerend by suitable tie links to .the unitary blade ’
structure. The spring 2l intermediate the ro
tatable support member 22 and the cap member
2i biases’the several portions of the blade as
umns 2 and a blade means l movable into and out
of engagement with these contact means is 'sup-f' , semblage to the position shown in Fig. 4. 'I‘hat is,
ported upon the rotatable insulator l.
- Each oi the stationary contact assemblages 'l _it biases the articulated blade elements IB to a
where the contact portions it thereof are
includes a jaw member l which is cast inteiral ' position
with the base portion i0 of the assemblage and as'closelyg adjacent the toothed portions I4 of
the unitary‘blade'structure as is possible. >>This 20
facilitates the engagement of the cooperating
20 an outwardly projecting ¿portion ii which is
utilized as'one of« the terminals for the switch.
A The upper of the two inner surfaces of each of
portions ofthe blade means and the contact jaws
i the jaw contacts is machined so as to deñne a
`A,the plalncontact portions I8 of thearticulated
the operation‘of the switch.
the jaw members 0 is machined into a knife edge Q during
The switch is shown m me fully dosed-position
form as `shown at I3 in Fig. 6 for cooperating
with one of the Itoothed >portions I4 of the blade Vin Fig. 1. `>In this position, the toothed contact
assemblage land the lowersurface of each of portions i4 fof the unitary blade element Il and
blade elements VIl are held into intimate en
gagement with the cooperating portions -of the
.one ofthe’ccntact portions il of the blade as- M contact jawsl. The rather considerable length 30
semblage. The outer’portion of each of the ¿law` of the blade elements I8 and the positioning of
soo contacts is ilared in order to facilitate the entry
the link members 21 closely adjacent the outer
`_ of the cooperating blade portions therein.. o» '
`of the blade assemblage allows the inherent'
The blade assemblagelcomprises in eiiect >one
curved surface as shown at Il for cooperatlngwith
unitaryl blade member Ilwhich is supported on ~ >resilience of the blade members to be utilized as
>the source of contactpressure between~ the co
the rotatable insulator I for swingable movement _ operating portions of the blade assemblage and
about the‘axis thereof andafpair otarticulated the contact jaws. To “open‘the switch, the ro
blade elementsv I8', likewise supported
-tatable >insulator I is turned in a clockwise direc
rotatable insulator 4 but. which are lrlovable'in-A tion (Fig. 2)_virom the position shown in Fig. l
dependently of the unitary blade element -i‘l dur
to the position shown in_Fig. 4'. This clockwise 40
40 ing the operation of the switch in‘order to eiiect rotation actuates each of the articulated blade
high contact pressure between the cooperating members “through-»the crank arm's 2B -joined
-contact portions of the blade means and the
contact jaws and toelfect thegoperlttiony of the
means for. mechanically interconnecting the
spaced stationary insulator> columns. `The uni-_
tary blade element i1 includes a pair of ytubular
' blade members- ILeach oi which is rigidly af
fixed to" a centrally `positioned cap member
n 2|
which-is bolted to the support member 22 for the
thereto, and _moveseach of the blade members
longitudinallywith respect to the unitary-l blade
element i1. The presence of the links 21 causes 45
the contactportion Il to move in the direction
of the toothed ~portion Il and thus decreases the
space between those portions so as to permit leasy
disengagement of the portions from the contact
which member is, in turn, bolt- l jaw 9. lThe swivel connection between the cap
50 blade assemblage,
member` 2| and the support member- 22. allows
ed to _the cap 23 of the rotatable insulator 4. The this longitudinal and lateral movement yof the
capv member 2i
contact portions I6 to take placewithout moving
support member 22 through a-deiinitely restrictv ` .the unitary bladestructure i1. When the articu
ed distance and a coil
biasing the cap member 2| and the blade por-v lated blade elements i8 have reached the position
shown inv Fig. 4,"or .the limit of 3 their relative
‘ tions supported thereon to a predetermined posi
tion `»with respect to the support member. The movement with* respect to the blade members
II, further rotation _of therotatable insulator l
" toothed portion il for engaging the toothed por
tion I3 of the cooperating contact> jaw is brazed Yin the clockwise direction will cause the toothed
`or -otherwise rigidly »aiilxed to the other end of members il to disengage’rthe cooperating toothed
lportions il ofthe contact, jaw 9 as ‘shown in Fig.
each of these tubular blade members i9.
As is-shown particularly in Figs. 1 and >4, »the 3, andthe entire blade assemblage to moveto' the
support member 22 for the blade assemblage is position shown bythe `dotted-lines 'in Fig.> 2,» the
provided with a pair oi'outwardly projecting . normal fully open position ofthe switch.
To close the switchì the central insulator 'l is 65
>crank arms 25 and the inner end lof each of the
in a counter-clockwise direction so as
otherl two tubular blade members il is pivotally ' rotated
to swing the blade assemblage from the open cir
ai‘llxed to each of these crank members. there cuit position to» a position where the toothed
sultant structure comprising a pair of articulated
u _of che unitary blade' element l1 en
bladeV elements. The contact element ii, sub-> o Vportiers.
gage the cooperating portions i3 of the contact 70
stantlallysimilarto the toothed members il’ ex
cept that the lower surface thereof is ilat, is af
fixed to the outer end of each of the blade ele
ments i8, and the unsupported endf of each >of
the articulated blade elements I8 is mechanically
76 connected to the~ adjacent unsupported end of
jaws. The biasing spring 24 causes the blade as
semblage to remain in theoposition shown in Fig.
4 during this portion of closing operation. As
soon as the toothed portions Il engage the closed
end of the jaws 9, further rotation of the unitary 75
blade element l1 is prevented and a subsequent
n by mesmo: a. sectas pair _of shuntsfsl.
rotation of the central insulator! will cause the
articulated blade portions il .to be moved from
` the position shown in 113.4 to the position shown
Through 'thisarrangement the terminal at Il
of the _switchis free to turn `with respect to the
rotatable insulator 33 during ‘the operation of
in -Fig. 1. This movementbi!v the- articulated
. the device. .l 'nie other.
or the ~ switch ,
is formed by an outwardly projecting element vI'l
blade elements `Il causes each ot the blade por
tions Il thereof to be moved longitudinally and i cast integral with thecontactjaw 31. _ .
A coil spring‘nll :which ispositioned interme
diate the u_-shaped support> “and the crank
laterally with respect to the unitary blade- ele
ment l1, and the combined result of this longi
tudinal yand .lateral .movement isito produce a
portion 4I oiïthearticulated blade `element '3l'
serves to bias‘the 'blade assemblage toa position _,
high pressure wiping-_engagement betweenthe
„substantlauyas rthat* shown in Fig.V 4;.¿tnat is,`
cooperatingcontact surfaces - Il ‘ot _ the , contact
>jaws i and the` contaEtj portions i0 of the two, . .to a position `where -the- contact portion It of
...articulated blade elements.v The _ lateral move i the _articulated blade yelement Il has been moved
ment of the articulatedblade elements Il> also _ as far as possible in the direction ofthe toothed
enects an intimate engagement: between Athe vportion Il of the unitary blade element Il. _ rI_‘lils
toothed portions Il ofthe contactiaws l and .the -_ arrangement, as'has been explainedinthe fore--`>to't'ithedportionsil of the unitary blade element going, faeuits't’es the entry or the.; unsupported»
I1, thus assuringv that the two `spaced stationary _end ,foi the blade >ass'e'inblyirlto the cooperating `
insulators I. shallbe rigidly interconnected'when . contact Jaw 31.
' the switchis in4 theg‘fully closed position.. ,_ j j j' "‘j
_ _The.'operation
of _this embodiment ormyfin;
By interconnecting` the switchesl the spaced " vention‘is substantially the same as the
stationaryinsulatorsl. during the switch closing: g'tion >of the three insulator switch previouslyde
\ operation, are subjected to substantially no canti-1 ` scribed. ‘ .'rne device is shown in the closed tira. ' '
25 lever-stress.. This permits the useof high pres ~cuit position in Fig.5'l.`_ ` To open the switch, ythe >
sure contacts witha 'wiping .action and _in_addi- _ insulator _Slis rotatedy in a clockwise direction `
(Flg..8), thereby causing thearticulated blade.
tion makes i'or a much more rugged structure. .
Figs. 7 through 9 illustratefanembodiment oi element n_’t'o b_e moved substantially to the_po-~
so break switch: . _The various structural elements t yto biasthe blade element 38 intoengagernent l30
- -my invention as applied-to 4a two insulatorgside _ sition shown infFlg.- 4. _The coil >spring if acts
îwith the `contact Jaw Il du'rlng‘this longitudinal
- of.
I _of vtheupon
a base litwhich,
described andlateral movement ofthe contact portion “_
> structure, mayfbe of channel iron and include j foi >the blade element l’. As soon as the articu- -
lated 4blade element 30 hasl reached they position »
a stationary insulator. column lihaving _a sta-`
tionary contactmeans 32 supported thereon and
shown> in Fig. 4, the rotation _of the‘rotatable 35
insulator `“is transmitted tothe blade’eiement`
I_jandthe entire assemblage is then swung as
p a rotatableinsulator column 38 supported upon>
thebase 30» by means-ofy a bearing Il. A blade ‘iul’
assemblage” isl supported upon and adapted," a"unit >from the closed. circuit positiontol the
' to be actuated in response» to the rotation of thef‘ _ opencircuit position which mayîbe'f90‘.- more orll`
»rotatable insulator 33.
lessg‘fromt'he position shownin Fig.' 8.
‘ prises a jaw member4 31 which is bolted _to the
stationary supportinginsulator 3l therefor. this
jaw ,beingv substantially the same as the jaw mem
bers _i in thefstructure just descijblìdt‘ßnd has
_ a knifeedge >I_Ifupper portion and a curved
`~llower portionzil. as is 'shown in Fig. 6. ~
'40 .v
The closing. operation of the switch is'sub
stantially the, reverse of the opening operation.
; The rotatable insulator 38' is turned so as to
f swing theentire blade assemblage from'the open
circuitposition to a -position where the toothed
portion ll of the blade element 30 engages the J
The stationary contact assemblage 3_2 com
cooperating toothed portion of the jawelement
31. The biasing spring ll by holding thefblade _
elements in the position shown in Fig. 4, assures
' p. » Theblade assemblage 8l comprises a pair o!v
bladcelements 3l and Il. `’I'he element 3l is a
thet'tne contact and _toothed .portions> 4s and>
unitary member and is >rigidly ainxed at one end
to a substantiallylU-shaped support III, adapted
l45, respectively; of that assemblage shall be'read
1 ily moved into'the contact jaw Il..` _Upon further
`Ato engage a bearing pin," which projects up
' wardly from" acast Aframe l2. .The frame l2 is _ rotation -ofthe' rotatable insulator Il the articu
' bolted to a ycap “of _the vrotatable insulator 33, lated' blade> _ portion \ Il is~ moved _from the `_ co1
asis shown particularly in Fig. _'l.l The outer ]_lapsed tofthe >extended position, thus moving lthe
» end of the blade member 38 is provided with a.v
toothed portion 45 for engaging thetoothed por--`
tion i8 ofthe cooperating contact jaw _31. -
l '
blade member“ longitudinally and laterally with
respectito the .blade .element ",@this ‘movement
v `being’controlled by the links Il ‘connecting the
`plain contact and-the toothedfcontact portions
' .The
blade element
3l `and I9
is is
en__out-Áv-f _Il and_;`ll6=, respectively,__ oi' the blade assemblage
wardly. projecting crank memberll‘ cast integral -ati .their unsupported end. The combined result
__'.with the frames! by means'of‘a >pivotlpin Il. "
" The other endoi.I :the-bladefmember-.II _is pro-,1l
' vided with acontactportion “.forjengaging the ,
cooperating portion Il‘of the contact, jaw I1 l
and isfmechanlcally connected to the outer end-
of this-longitudinal and. lateralmovement is to ’
produce fa' >high pressure «wiping engagement 'of
the cooperating _. contact portions _ll‘and' i5 oi'
the blade 3l and the _contact jaw `I1 and to cause
the cooperating toothed 'contact portions" and
-joi':the.blade element il by means of` a link`> or . I3 of those structures to be forcedI into intimate
pair o! links 50 and twopivot pinsll. .
'engagement With each other.
l By utilizing a `toothed element having.` a plu
shaft portion 4I of the frame 42 4and is provided `_rality ‘of -separate teeth as the interconnecting
with an outwardly projecting element 53 for sup- _ means for the insulators Il and n, a structure is
porting one oisthe Vterminals of the switch.- VA" provided which is capable of automatically ad-_
A cylindrical member l2 is journaled upon the
ilexible shunt 54 connects the cylindrical mein--V » justing itself` to a very substantial amount offrel
ative displacement of the stationary and the ro
ber l2 with the blade element.“ _and this ele
ment, in turn, isconnected to theblade element
tatable insulators. Satisiactory operation of the
' 2,137,077
’ interconnecting means under extremely adverse
conditions isthus assurred.
spaced'insulator columns to rigidly interconnect
said columns withoutl subjecting the columns to
From the foregoing it will be seen that I have
ydescribed two embodiments of a novelform of
side break disconnecting switch which possess
numerous advantages 'over thestructures here
toiore .known to the art. More particularly, I
have disclosed a double break three insulator dis
connecting switch which isprovided with'means
for rigidly. interconnecting the three insulators
during the operation of the ~switch so as’to im
part rigidity and strength to the device, and
which interconnecting means is capable of auto
matically adjusting itself to a very substantial
substantial cantilever stress.
3. In` an electric switch, a pair of spaced insu
lator columns, contact »means rigidly supported
upon each of -said columns, a rotatable insulator
disposed intermediate said spaced columns;I a
blade means supported o'n said rotatable insu
lator having a contact portion at opposite ends
thereof movable into and out of engagement withj
said contact means in'response to rotation of said
rotatable insulator, and means responsive to the
>rotative movement of said rotatable insulator for
causing said contact portions of said blade means
amount of relative displacement o! the several to engage said 'contact means ‘with a wiping ac
insulators- of the'switch. Further, I have shown tion, said blade means having other contact por
how this interconnecting means; can be applied to tions adapted to interlock ' with said contact
a switch «structure which utilizes cooperating ' means in one 'of va plurality of` predetermined
contacts adapted toengage each other with a positions for interconnecting said spaced insula
‘ tor columns> prior to` movement of saidinrst- _
high pressure wiping engagement.
` I have also disclosed how the above features for named contact portions'intowiping engagement
automatically interconnecting the rotating in
with said> contact means.
sulator , and the spaced stationary 'insulator _may
be applied to a two insulator side break discon
necting switch with all of the advantages result
4. In an electric switch, a pair of spaced insu
lator columns, contact means mounted on each
oflsaid insulator columns, a rotatableA insulator
disposed intermediate said- spaced insulator col
umns, and a'blade means supported upon said
rotatable insulator and movable into and out of
Aengagement with said contact means in response
ing in the case of the threeinsulator switch.
Both of the structures are relatively simple in
design, they are easy to service andare not un
reasonably costly.
ì '
While ‘in accordance with the patent statutes, "v to the rotation of said rotatable insulator, lsaid 30
I have disclosed in the foregoing thedetails of
blade- means including means for'rigidly inter
are merely illustrative and variations in their
ing means including cooperating toothed mem
certain preferred embodiments of my invention, connecting said spaced insulator columns during
it is to be understood that many of these details the .circuit closing operation,-said interconnect
b'ersat least one of which'has a plurality of teeth
35 precise form will be both necessary and desirable Y
in certain instances. It is my intention,- there
fore, that the language of the accompanying
claims shall be accorded the ybroadest reasonable
to'provideffor cooperative engagement lof said
members in any one of a plurality of positions,
a contact portion for engaging each of said con
construction and shall be limited only by what f` tact means, and means for causing each of said
is expressly >set forth therein and by the prior contact portions to be moved, with respect to the 40
contact means with whichA it vcoacts during each
switch closing operation so as to eiîect a high
Y ` . I. claim the following as rny‘invention:y
1. In an electric switch, a pair of spaced insu- ‘ pressure wiping engagement between'each of said
_ lator columns, contact means mounted on each
45 ' of said spaced insulator columns, a rotatable in
sulator disposed intermediate said spaced insu
p lator columns, a blade means normally supported
on said rotatable insulator for movement into and
out of engagement with said contact means, and
means responsive to the rotative movement of
said rotatable insulator for causing said blade
means to engage said contact means with a high
pressure ‘contact,_.said `bl-ade means having con
tact portions adapted to interlock with said con- y
tact means in one of a plurality of predetermined
contact portions and saidA contactv means. ,
5. In an velectric switch, a pair of spaced insu
lator columns, contact means rigidly supported
upon each of said insulator columns, a rotatable
insulator disposed intermediate said spaced insu- v.
lator columns, and conducting means supported '
upon said'rotatable insulator column and mov 50
able into and out of engagement' with said con
tact means, in response to the rotation of said
rotatable insulator, said conducting means in
cluding a plurality of blade elements, one of
which comprises a relatively rigid bridging mem 55
ber supported on said rotatable insulator for
swingable movement about the axis vof rotation
thereof, and the othery of said blade elements
comprising a blade member, said bridging mem
ber and said'contact means being provided with 60
_ lator columns, contact means> rigidly supported cooperating toothed> membersïadapted to en
on each of said insulator columns, a rotatable in 'gage each other in any onevof a-plurality of po
sulator column disposed intermediate said spaced sitions for rigidly'interconnecting said spaced in
insulator columns; and a blade means normally ' sulator columns when> said interrupter is in the
positions for interconnecting said spaced insula
tor "columns prior to movement of said blade
means into high pressure engagement with said
closed circuit position, said blade member in 65
andr movable, in response to the rotation there-v cluding a contact portion `which ‘engages each
of, into- and out of` engagement with said'contact of said contact- means, and means for 'moving
said blade member- during each closing opera
means, said blade means and said spaced insula
tion of said switch into a~high pressure wiping
tor columns having- cooperating toothed mem
supported upon said rotatable insulator column
bers for rigidlyinterconnecting said spaced insu
lator columns ’whenv said interrupter is in the
>closed ‘circuit-` position, and said toothed members
, lbeing disposed longitudinally of said blade means
o for engagementwith each other irrespective of
75 the displacement within certain limits of said
engagement with said contact means.
6. In a side break electric switch,"a stationary
contact means, a rotatable insulator and a blade
means supported thereon for swingable move
ment into and out of engagement with said sta
tionary contact means in response to the rota
i f
tion'oi» said-„rotatable'insulaton
said blade means
fdinal‘movement’of said'blade member for caus
ingïthe- contactyportionb! at. least lone of said
said rotatable
‘bladeelements _to engage'the 'cooperating con
tact portionïot- saidïcontactímeans‘with a high
.movement about `,the ,pivotal axis‘fthereoi'fï‘~beá- 'l
tween _predetermined `angular positions, anvar
ticulated blade'imember, pivotally añixed atone
end to said rotatablelinsulator, a linkage joining
l 9. In anlelectric’switch;
wiping engagement."
a ’stationary insulator
column; a Contact' means-mounted thereon, a ro- `the otherä end-offsaid articulated blade member'> tatableï‘insulator, meansz;comprising a pair of
ïelements's‘u‘lpported' upon said rotatable in
end` thereof,
blade> member
«and means
the in blade
sulator and' swingable r1x1/response tothe rotation
- _ , ,response` to the rotation `of‘said rotatable 'insu-v
\' i
lator between said: predetermined ‘angularfposi
Íthereoi' 'finto and "out ofïîengagemfent‘ 'with said
` contact means, lostf-“rnotionimeans operatively'
tions forimoving lsaid articulated blade member
coupling one o-‘o'f'isaidi elements? and >said 'rotatable
„ lis`_longitudinally and independently'oi‘said unitary insulator, the «whenbfjsa1~ç1'.tieneV ‘elements be
blade member, said-linkage being responsive-‘to », ing mechanicallyconnectedg'at itsfouter end to
l f »the llongitudinal movement `of saidf'larticulated» :said tlrstimentioned blade *element _ arid pivotally
, _ blade member for eiïecting a high pressure wiping ï, connected i at - its »inner end’tb a _crank member ‘ 1`
_engagement "between `the 'cooperating contact'A *j ‘rigidly~` amies* »to Y said’ rotatable" insulator, said -
portionslof said _contact means and ‘said blade'
Inl a side :bre
means having; ‘ cooperatin`g-` 'toothed portions
a ¿léase ¿esta 'statmnary? adapted toengag'e each‘fother `in’a'ny'one of a
.plurality of positions fior ‘ positively' ' interconnect? '
l» _ contact means,` `a; rotatable-insulator- and a blade `>
_ lmeans supported `thereon for ‘swingable move-2*]` ingsaidi‘stationary insulator column _and said ro--`
ï ; , mentintoiand `outjof engagement with said"sta`-" tatable insulator{colummwliensaid _interruptor is
tionary ,contact means in` response tothe r'_o'ta-‘4 ~ nff‘the closed "cií'c'suit'position` said -`last?rnentioned
\ 1 `tionof said;rotatable«»-insulator, saidfblade means
25 "
A"blade :element*beingïmcvable' longitudinally with
i ¿3 _including-a* unitaryblade memberfsupportedffon ‘~-res'pectìto"said nrst=mentioned bla'cle element in
». saidzrotatableV insulator for relatively rotatable`~~-' response fto‘yniovement "of __s'aid crank> member , ï
movementabout the‘pivotal axisf thereof betv'veen'Y yrig'_idlyiafliíced ofsaid rotatable insulator column
_-\_ e
i `30'.
predetermined’angular positions, an articulated
_blade member pivotallyxaiilxed at one endto said@
insulator, a.A linkage Vjoining the -other end offsaid*
_ ' _contact-»means `arid*s_aidfblade lmeans 'andto effect
* articulated „blade member-toî'said- unitary blade" ` i _the'f‘cooperative*engagement‘of ‘said interconnect- ' l
member adjacent theunsupported Lend' thereof; ‘fing 'means ' during; each ' operation oi "said switch.
>>`and» meansnoperable in 'response- to therotation ‘1 l0'. an'electric-switch_including-acontact, a ro
- of said rotatableinsulator betweenfthe predeter
ï‘tatable actuating@insula/tor;Li?l >‘switch blade hav
mined angulanpositionsj‘for moving-said articuï
~ ing "a‘ contact atl one _end :thereoi for _engaging the
lated blade member ylongitudinallySand inde- 1_ ' "first said contact,`_`_ s_a ‘ " 'sw_ii'._'cl’_11` _blade 'being piv-`
pendently foffîsaid unitary blade memberfsaid’f" otallymounted on said’__rotatable insulator and
40 linkage being responsive to the longitudinal"` 'f being actuated thereby,"`theI pivot'of'the switch
movement of saidarticulated'blade member for` vblade being coincident with the axisof rotation
eilîecting a-‘high `pressure wiping engagement‘be-f‘4 «of _the insulator and permitting rotation of` the
tween the cooperating contact portionsof said insulator relative Vto the blade, spring means_be-l
contact means’and said articulated blade inem» 4tween the .blade and the `insulator tending to ^
45 ber, the contact portions of said unitary >blade ¿ maintain them in a predetermined angular posi-_
member and the cooperating contact portion of" tion with respect to oneanother, said rotatable
said contact means being provided with serrated insulator being rotatable _relativerto said bladey
surfaces for positively interlocking said unitary '.
against the biasof said spring after engagement
blade member with said contact means in any
of the contacts tomovevthecontacts into flnal
_ high pressure engagement,A and theengageable
8. Inr an electric switch, a stationary insulator.v surfaces' of said. contacts having cooperating
50 one of Aa plurality of positions.
‘ ,
column, a contact means mounted thereon, a ro
4toothed portions for positively interlocking the `
tatable insulator, a blade means comprising a,_v
pair of blade elements supported upon saldro `_
55 tatable insulator and swingable into and outof
engagementlwith said contact means in response
>to the -rotation thereof, one of s-aid blade ele
switch blade with said first contact in any one
_of a plurality of positions as determined by the»
. ments being rotatably supported upon said ro
displacement between said first contact and said
11. InV an electric
` switch,` a contact membena'
pair of switch bladesfeachliaving acontactfat
tatableinsulator for relative rotative movement onjexend thereof for‘engaging said contact mem~`
60 about the pivotof said insulator, a mechanical. ber, "`a._ linkage joiningsaidblades adjacent `said 60
linkage connecting the other of‘said blade ele
contacts, a >rotatable insulator for pivotally sup
ments at its outer end to said iirst mentioned ,_ porting said switch blades and for actuatingv
blade member, a crank member rigidly añlxed to them to open and ‘closed positions, one of said
said rotatable insulator and pivotally connected ` switch blades being rotatably _movable with re
65 to the inner endof said other blade` element, said spect to said insulator between predetermined 65.
support means for said :first-named blade ele-, _angular positions, and means responsive to the
ment permitting the rotation of said crank mem
rotation of saidv insulatorbetween said prede
_ ber independently of said first-mamerginblade` ele» ' termined angular positions for moving the other
lment during the final stages of each closing op ‘ o_tsaid switch- blades longitudinally `with respect
eration of said switch, said last-mentioned blade , yto said ñrstblade, saidI linkage being responsivel 70
element being _movable longitudinally with re to the longitudinal. >movement of said switch
spect to said `first-mentioned blade element in' `'blade for Acausing saidcontacts to firmly engage ‘
response tothe rotation of said crank during the ysaidcontact member, at least one of said switch
cooperating contact vpor
circuitclosing operation, saidmechanical link blade contacts and
contactf'memberbeing provided with
serrated surfaces for positively interconnecting
the switch blade and contact member.
causing said contacts to iirmly engage said con
tact member, at least one of said switch blade
12. In an electric switch, a'supporting insula
contacts and-‘the vcooperating contact portions
tor,v a contact member mounted on'said insulator, . Voi'said contact member being provided with ser
a rotatable insulator, a l¿pair of blade members,-A
for positivelyinterconnecting the
mounted> upon'nhsaidrotatable. insulator and op Aratedvsuriîaces
switch bladeand contact member.
erable by the rotation thereof into engagement
. 14.,In an _electric -switch,'. a supporting insula
with said contact member, a linkage joining said tor,.a
contact member mounted on said insula
blade members adJacent the endvwrhich engages
tor, a rotatable'insulator, blader means carried
by said rotatable insulator adapted to be swung 10
ing rotatablerelative to one o_fk said blade mem
, bers "between predetermined angular positions,` into and out’of engagementfwith‘said contact
lmember 'by -rotation of said rotatable insulator,
10 said contactmember, said rotatable insulator be-`
tl'ieother of 'said bladeïmembers being longitu and means responsive'to .the rotative movement
dinally movable-with> respect tothehfirst said , of
said rotatable insulator for causing said blade
.blade member “bythe rotativemovement of saidÀ means- to engage -said ‘contact’ member witlf'a
, rotatable insulator betweenA said'predetermined'` `high
pressure contact, said blade means having
angular positionsfto actuate lsaid linkage and> ‘contact
portions adapted tofinterlock with said
' f therebymove said blade `members into iìnal high ~» contact` member in one of a plurality of predeter
pressure contact withsaid contactmember, and
positionsl for interconnecting said sup
.the engageablevcontact. surfaces ofA atv-least onel « mined
port _andsaid rotatable insulators prior'to move 20
of said blademembers andsaid lcontact member _» ‘mentiof said blade means into high :pressure en
Y having cooperating toothed. bportionsyforgpositive#
gagement with said contact member. . "
ly interconnecting, said insulators when,y the@ v- 15._ In an electric switch, a pair of spaced insu
switchis in the closedposition. ~
lator columns, one of'which >is rotatable, acon
13. In an> electric'switcna cuntactmember;` a ` tact‘member supported‘upon the other‘insulator
pair of switch bladeseach havingraïcontact; at;- `column,
a` pair of blade‘elements carried by said
one end thereof4 for engaging said contact mem
insulator column, said Vblade elements
l, _ber,_ a linkage Vjoiningsaid blades adjacentsaid .rotatable
being adapted to be-movedinto'and out of en
' -contacts, arrotatableiinsulatorji’or pivotallyvsup-A- ~.
porting said switch_„blièide_s.l and for¿_actuating` fgagement with `said v,contact member’in response
_ them‘to openïandftoclosed positions,`one of*j said c to rotation of said rotatablef'insulator column, 30
responsive rto theirotation‘of said ro
switch blades' being rotatably movable' `with Are and means
insulator column for moving said blade
' spect to said insulator between predetermined »tatable
relements into -final» high Dressurefiengagement
" , angular positions, means biasingsaidfirst-named
blade to Aa predetermined angular position'with -with said Acontact member, at least. one of said
respect to‘sa'id insulator, andsirieansr responsive
, blade elements and‘said‘contact‘m'ember having 35
a yserrated contact Aportion for interlocking en
d to the rotation o1 saidinsulator between` said
with eachI otherpinone of 'a plurality
ì. . predetermined angular `Apósitioifis .against said*` gagement
of posltionsprior- to movement :of said blade ele
" biasing means forì moving the other of said switch _
ments into final Ihigh pressureV engagement with
40' blades longitudinally> with >respect to said first said»
contact member.
blade, saiqiinkagebeing responsive tothey 1on
rgitudinal movementfoi
witch~ bladé„„,for
l I“
» » :HERBERT J; enanas.
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