CA 02272957 1999-OS-26
ARi~ANGEMENT QF A ~iLEEuE, A COAXIAL CABLE. A~1D ~~
FElLIALE COAXIAL CONNECTOR FOR COAXIAL. CG~NNFC-
TOR FOR TELECOMMt!NICAT(ON SYSTE,~IS
The presEnt invention ccnc:ems a sleeve for coaxial C,~,,r',f',E~tin~r~
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Mcra ,speci~caliy, the inventicr~ ~:.onc2rns an ar,~ar~cerwar,; ;,~f ~;
sleeve, a coaxial cabla and a female coaxial ~nnectcr for coax;ai
cenr,ection of the above kind to be employed to duple in a ~uic;t anG
eiectricatly perfect way a coaxial cable with a female coaxial conner:cr, for
$xamcle provided with an outer thread and a central contact, e.g, an
alastic central contac; of the F kind connectors.
As it is known, to corne~~ coaxial cables with alec;rrcal ~cr
e)eCrcr~ic circuits, and more oarticuiarfy fen the coaxial. c,~,nnec;ier.s
emFioYed f~.r ~e realisation of systE~ms for the distriCuticn of radio. V
t 4 signals. met3ilic clamps are generaJ(y employed, said clamps irping chea;r
but raving different technical drawbac(<s.
The above drawbacks are even mere evident if considering :hat
the advancement of the state cf ,he art makes .t ccmr-,on the sae of signal
reception and distribution systems having frequencies higher than 4CCC
<<: MHz, s~:ch as the satei(ite reception systems, the c:zerip re>t,vor'<s,
the
MMOS sys;erns and so cn.
In order to obviatQ to these c'rawbac~cs it is advisaCle '~e usa cf
n'ale and ,'ema(9 CaaXi21 connectors, the first one coc.;p(ed tc tt~e cc2xiai
c.-,aCle and tt-e ether one t~ the final circuit.
~5 Tne technique already known generally promdes, for the
connection cf coaxial cables with co;~,~cial c ;nnectors, t~ a ~,veiding cr
scre~,ving of the two pelts to the cable of the conneC.or encs, cr the
screwing cr cr imping Qf the male cc~axiaf ccrnec;er cn the sc; een
ccr;dc:ctcr cf the coaxial cable.
Further, the coupling cf the cable with a connector is realised
by screwing or by ccuo(ing cr ir;trcducticn of two metallic our ns, a rvgid
one
and an elastic one, respectively.
On tre basis of these solutions, a(I the Yast ar.d presar~t
systems; patented cr not, and all the cor:~merciai coaxial connectors have
~5 treen dev~?(cced.
?"ne choice cf this kind of se!~.tion for the ccuclirg c,-' cca:aal
~5les is d~;e 'c 'he (imiter' use of tt~a ccaxiai joints emF~cyec cr~
rrePessicral aFoaratuses only, highly qxpensive with respect to tre cost
c. era cr rwo ;raditicr.ai coaYi21 jcir;ts.
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CA 02272957 1999-OS-26
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i ne most updated te~c~nolcgica! dsvefepmer~t ~as instead
grpatty widenec tre fields of use of the :oaacial ~bies ar~G consequently
of the relevant connectors which, if employed for uses suc.~ as the
radicfret~;:ercies dis',dbc:'icn in ~i~e demestid builcings, hi~t~iy ;nf?uerce
the cost cf tre wc,~c necesvary t~: cetair: a 'ec-,; nically er;cierr ~:,: -
.,~ee~
and easy 'o apply ;,: ~upling.
'v~~thin this general :yituaticn, it is inc,uded ti"e sclut:cn
suggested awarding to the prese~n# invention whic.'~ is able to satis~,~ tr;e
above r;eedings, being completely different with respect to the systems
already employ>rd.
Main object of the prF~sent invention is that of obtaining a
sleeve for coaxial connection alfowir?g to realise a coupling t;eh,veen a
coaxial cable arid a female coaxial conneCor sa as tc ct;tain, wiihir a
frequencies range between G and morn than 2QOC I~~H', a c;.nstart
impedar~cp power transfer, with maximum car.centricity, maxirnur-~
electroma5uetic sG'eening, minimum loss of the signal. m~~irvum
misr~atching and minimurn parasitic: :apacitance.
It is a further cbjec: of the present invention that of r caiisrg a
sleeve for waxia! connection allowing a connection t;er~rYeen a coaxial
cable arid a 'amale coaxial conneci:or having a good mechanical cct:cling
but which is at the same time easily removable.
A further object of tre invention is that cf realising a sleevE 'cr
coaacia! connection allowing a connection behnreen a coaxial cable an,~i a
female coaxial connec;or very easy to be E ealised, to be used ~yvithcut t~e
25 need of any specfic tool, with minimum sizes and vey cheap.
Ti~ese and ether results arts obtained according to the present
invent;orr suggesting a sleeve far coaxial connection ccupable by pressure
for telecernmunicaticn systems employing as contra! pin of tt~e connection
the rigid central Conductor of the c;:axial czble fixed by pressure cn the
30 outer sun~ace of the female connec;or by a sleeve slidable cr ;tie raCle
and having en its rear portion a diameter corresponding 'a er slightly
greater thsn the diameter of the coa:<iaf cable and on its trGnt perion a
diameter slightly greater than the onf; c~~ aata-cf ~e rerr~ie c~r~e'~',
!t is therefore specific object of the present invention an
arrangement of a sleeve a coaxial cable and a female coaxial connector
suitable for coaxial connection, particularly for the rtiechanical and
electrical connection of the outer screening conductor of the coaxial cable
AN1EIVDED SH~~T
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CA 02272957 1999-OS-26
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with the outer wall of the female coaxial connector, said
female coaxial
connec;er being of the kind providing a substantially
cylindrical outer waif
and an inner, insu'ated central female contact, characterised
in that said
sleeve has a f~rst and a second coo:<iai inner cylindrical
scGt. said ~ir5t
seat having an inner a ~ ; ~~.. .~s cobi~ ~ s~i ~ ~~ r
~i~.meter (d ~ ~rr~ p g to ~r , gi~;ly ~.'e~ a
than the outsr diametar of said c.a~:2 and Said sECOnd
seat raving an
inner diameter (d2) slightly greater than the outer diameter
of the outer
wail of said female connector, and being realised by an
elastic materia4, in
such a way to obtain a pressure coupling of the outer
screening conductor
of the Coaxial cable between the ~iee~~e and the outer
wall of the female
coaxial connector, the connection zone between said first
and second
! seats being realised by a sloped wall.
Prefera>aly, acxrding tc~ the invention, at feast one
pro;ecticn
can be provided within said seccnct seat.
' ; ~ Furthermore, ac;,crding to the invention, outside said
saccnd
seat, close tc the outer cnnr;edicn zone with said first
seat. a circ.;lar
pre;e~ction car be provided.
Stlll according to the inv~es~t:en. spaced !anrituc:ina(
ribs can t~e
provided cutside said second seat.
Always ac:.ording to ire invention, on the inner ~ur;acs
ef said
' fast and second seat a roughness can be provided.
~~litrin said first seat, longitudinal lugs can Ire f,:rther
prcvidec,
preferably three tugs circumferentially spaczd at t20.
- Furhermore, within said second seat, Icngitudinai lugs
can be
further provided, preferably three iuc;s cireumterentiafly
spaced at 12C.
PJw2ys according to the invention, said sleeve for coaxial
connection is used fcr the connec;ion of the coaxial cable
screen made up
of metallic braid, with the threaded outer scrEening of
a female coaxial
connector, or it is used far the connection of the coaxial
cable screen
;;,p made up of one cr more metallic fcils, with the threaded
cuter screening of
a female coaxial cable, or still for the connec;icn of
the coaxial cable
screen, n-ode up of metallic braid and one or mare metallic
foils, with the
outer screening of a female coaxial connector
Furthermore, according to the invention, said sleeve fcr
ccaxi2l
:;5 connection can be made up with pias~;ic material, elast;c
material, such as
rubber, or elastic metallic material.
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CA 02272957 1999-OS-26
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The present invention wi~il be now described, for illustrative but
not limitative purposes, according to its preferred embodiments, with
particular reference to the figure of t~ne enclosed drawings; wherein:
figure 1 is a perspective view of a first embodiment cf a sleeve
fer coaxial cennecticn according to the invention;
figure 2 is a perspective; view of a sec,~,nd emCocment cf a
sleeve for Coaxial connection, acccr~ci~g to the invention;
figure 3 is a section lateral view of the head of the ~3xial cable
ready for the connection;
figure 4 is a section vie~nr of a sleeve for coaxial connection,
according to the invention;
figure 5 is a section view of the coaxial cable, of the sleeve for
coaxial connection and of the female: coaxial connector of the F kind ready
for the realisaticn of the coaxial connection;
figure 6 is a section view of a connection of a coaxial cable with
a female coaxial connector of the F kind realised employing the sleeve fcr -
coaxial connection according to the invention; and
figure 7 is a partially sectioned view of a connection between
two cables realised employing two sleeve for coaxial connecticn acccrding
to the invention and a double fcmale~ coaxial connector of the F kind.
Making reference to the figures of the drawings enc;osed, the
slidable sleeve for coaxial connection 1 according to the present invention
is comprised of an integral body of rnaterial preferably semirigid or elastic,
in the hollow inner part of which t.wo coaxial cylindrical seats 2; 3 are
obtained, said seats being connected sry a sloped wall 4, and having the
inner smaller diameter d1 correscwnding to or greater than the outer
diameter of ~he coaxial cable 20 used for the connection and the bigger
inner diameter d2 slightly bigger then the outer diameter of the threaded
surface or wall 41 of the coaxial connector 4D in order to allow to fix the
screen 21 of the coaxial cable 2D between the threaded outer surface 41
of the coaxial connector 40 and the inner surface 5 having the diameter d2
of the slidable sleeve for coaxial connection.
The cylindrical portion 2 of the sleeve fcr co&xial connection
wounding the coaxial cable 20 is quite long, as shown in figure 1, in order
to obtain a greater mechanical stability far the connection, er shorter, as
shown in figure Z, to realise a connection in limited spaces, such as the
embedded boxes for the fittings of tree ds~butior~ ~r~arsofthe radONs9"~
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CA 02272957 1999-OS-26
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1
The inner surfaces cf the sle°ve Par cca,~lal :cr~~~c;ic~ ; 1
according to the invention can 5e roach in orr:er to inG ease :he achererce
of the sleeve for Coaxial c4nne<aion 1 with the outer shea;h 22 cf the
coaxial cacle 2G and with the Er~readed cuter surface cr wai; a1 cf the
,. 1°rr!al9 cca~iai c;.n:~~:c;~r ~. Ti~i~ ~i~.'~.:~; ~~ c~var~in~ ~ ~?
A"= 5;~!:ya '~;r
coaxial ~nraciLn 1 having Giarre;s~r d1 ensJs ~~rith a flared ~~r° ~
m2!~;rg
it ~'aSl~t t~"e If'S~~ ilCn Cf a L~ 518~4'E? ?Cr cr~aYial CCr'neCtlCn i ~('
;hE3 terr.'sin~l
afi the cc~aacial cable 20.
The circular opening 8 or the sleeve for coaxial crnnecticn 1
1c? having the diameter d2 ends with) a flared pcrtic7n 4 raking it easier the
insertion cf the sleeve far coa~:ial connection on the female raaxiai
connector 40.
Fcr partic::lar usas tt-;e slidalole sleeve sleeve 'cr cr~cia!
connec;icn 1 can be proviCed fir, tt,e inner par; with prciec;ions 1G
r;rani~ng
l;. it moor ~~ere di~'icult the removal 4f tt~e 'emale coaxial ccnr~pc:cr ~0,
'
he thickness of t''e s:lidabie sleeve craxial connector is a
func~~ien ai the dimensions cf the coaxial cable 20 to be connected and cf
the material employed for tt-s realisation cf the sleeve for ccaxia~
cannec:icr 1. The c~.ter wall 1 ~' cf the slidable sleeve 'er ~aaxial
20 connection t has a circumferencial ridge 12 to make it easier, by creating
a
grin uccn whic~ it is possible tc exert a higher prasssrre with the !yards,
during the insertion and removal opE°rations ofi the slidable slqPVe
.or coaxial
cornect:on 1 frcrn the fema;e coaYlsti connector 40.
Lugs (not shown) can be~ provided within the seat ~, nreferat;Iy
?5 three lugs at 12C°, to avoid th:? sliding of the sleeve for coaxial
cc.~nec;icn
'f along cables having smaller diamslter.
The use ef the slidable sleeve for coaxial corn ~ec;icr 'f as
described is particularly simple:
as first step, the sleeve for cea'<ial connection 1 is irtrcc:;:eed
3t7 from the part with the smaller diam~ster d1 vn the terminal of the coaxial
cable 20 to tre c;,nnected:
then, the coaxial cable a?0 is suitably prepared as shcwr~ in
'gr~ra 3, widening the screen 2" of the same cable and cbtairinr~ a:he
situation shown in figure 5;
35 new the central conductor 23 of the coaxial cable 20 within ore
central tap 42 of the female coaxial connector a~;
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-CA 02272957 1999-OS-26 w
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finally, the sleeve for coaxial connection 1 slides along
the Coaxial cable 2Q toward the female connector ~0 up to tfi~e
complete coupling with the threaded outer surface er wall 41
of the connector ~0 with the sie<eve for coaxial connection ' , ,~s
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6
shown in figure 6: by this step, the s ~ een 21 of the coaxial cable 20 is
automatically lied o,~, and ~ghtened on the threaded outer surface cr wall
41 of the female coaxial conneCor 4D at the same time obtaining the
dt~uble mechanical and electrical couplir;g beh~reen the able 20 and the
connec;cr ~0.
From the desG'iptier. of the :caxial c ;up:lr:g c~tained by the
solution aC.~.ording to the present ~rnrention, the advantGcas that said
coaxial slidable sleeve far coaxial connection 1 ailcws to obtain with
respect to the known coaxial connection systems are cuite evident.
7 0 )t is in fact evident the ease and the convenience of use of the
solution according to the invention, whic;~ can be set up without employing
any tool but the one necessary to strip the coaxial eacle 2G.
Further, the electrical features cf the coaxial coupling are
optimal: the concentricity and t'~e complete screening ef the connection
are ensured by the immediate electric contact between the czble screen
21 and the outer surtace or wall 41 of the connector ~0, contact obtained
immediately after that t3ie screen 21 of the coaxial cable 20 is widened
and detaG~ted from the dieiectr is 2~ dividing the same screen 21 from the
central conductor 23 of the waxiai cable 20.
These features allow to have a perfect wortcing of the coaxial
connection within a freguencies range between 0 and more 'than 2600
MNz.
The sleeve for ~,,oaxiai connection 1 acc,~,rdirg to the invention
further allows to make coaxial connection within small spaces, such as the
space available within tt~e :..~sual connection blocks of the radio TV signal
distribution systems provided within the houses_
A further remarkable advantage is due to the low total cost of
the coaxial connection that such a connector allows to realise, cost
obtained adding the cost for the material of the connector with !he cost of
the labour necessary for the realisation of the connection: as it is evident
from the above specification of the solution according to the invention and
of its use, both ,~,osts are very low and in any case lower than the costs
necessary to make a valid coaxial connection empbyir~g 'c~rr>~rs.
Further, the sleeve for coaxial connection 1 according to the
35' invention completely covers the connector, protecting the same.
CA 02272957 1999-OS-26
7
Another advantage is due to the fact That the sleeve for coaxial
connection 1 according to the invention can be used more than once in
case it is necessary to make the connec~icn again. ..
Moreover, the squeezing ef the cable does net cc:...,r,
squeezing instead Qccurring with the other soiutlcns cf the prier ar*,.
Ali the above mentioned advantaCes are such to rr:ai~e ;he
present invention,aavantagecusly usa~bie in any aqplic.'-tics invclvir~ the
coupling of ccaxial cables.
The present invention has been descrit:ed for illustrative but
p not limitative purposes, according to its preferred embodiments, b~.~t it is
to
be understood that modifications anchor changes can be introducxd by
those skilled in the art without departing from the relevant scope as
cefned in the enclosed ciaims~
