
Therefore, a present need exists for a superior polymer-wood composite based on an easily processable polymer which has better weatherability and dimensional stability than contemporary products on the market. This invention relates to electrical connectors, and in particular to keying structures therefor.
Electrical connectors may be provided with keying structures to permit predetermined pairs of connectors to mate with each other and to prevent the mating of connectors which are not intended to be mated with each other. Keying structures are usually provided on connectors when a plurality of identical connectors are positioned in situ in close proximity to one another so that there is the risk of the wrong connectors being mated therewith. Keying structures do not interfere with the mating of connectors that are intended to be mated with each other but provide interference with the mating of connectors that are not intended to be mated with each other, so as to prevent such mismating.
The keying of connectors is to be distinguished from the polarization of connectors, in that polarization ensures that a first connector which is matable with a second connector is properly oriented relative to the second connector for mating; whereas keying provides a mechanism which permits the mating of connectors which are intended to be mated with each other but prevents the mating of connectors which are not intended to be mated with each other even if they are properly oriented with respect to each other.
U.S. Pat. Nos. 4,822,305 and 4,832,624 disclose keying systems in which a key member is secured to one of the pair of complimentary connectors and is adapted to cooperate with an opposing key member secured in the other connector of the pair.
Each key member is secured in its connector in a selected orientation with respect to its opposing key member so that when the connectors are intended to be mated, extended portions on the key members pass by each other during mating to allow the connectors to mate. If one of the key members is secured in an orientation that is not complimentary to its opposing key member, the extended portions on the key members will engage one another during mating to prevent the connectors from mating. U.S. Pat. No. 4,929,184 disclose a keying system comprising parts which are securable to metal flanges on an electrical connector.
There is disclosed in U.S. Pat. No. 4,934,950 an electrical connector having keying means which are securable in one of a plurality of different angular orientations in a plastic housing.
U.S. Pat
Therefore, a present need exists for a superior polymer - forest complex based on an easily processable polymer which experience full weatherability and dimensional stability than contemporary product on the marketplace. This invention relates to electric connection, and in particular to keying structure therefor. 
 Electrical connectors may be provided with key structures to let predetermined pairs of connection to mate with each other and to prevent the mating of connection which are not intended to be mated with each other. Keying structures are normally provided on connection when a plurality of identical connectors are positioned in situ in close proximity to one another so that there be the risk of the wrong connectors being mated therewith. Keying structure do not intervene with the mating of connectors that are intended to be mated with each other but provide interference with the coupling of connectors that are not mean to be mated with each other, so as to prevent such mismating. 
 The keying of connectors is to be distinguish from the polarization of connectors, in that polarization ensures that a first connection which is matable with a second connector is by rights oriented relative to the second connector for mating; whereas keying provide a mechanism which permits the mating of connectors which are intended to be mated with each other but prevents the mating of connectors which are not intended to be mated with each early even if they are properly orient with esteem to each other. 
 U.S. Pat. Nos. 4,822,305 and 4,832,624 disclose keying systems in which a key member is secured to one of the pair of complimentary connection and is adapted to collaborate with an opposing key member secured in the other connection of the pair. 
 Each key member is secured in its connector in a choose orientation with respect to its opposing key penis so that when the connectors are intended to be mated, extended portions on the cardinal members pass by each other during match to allow the connectors to mate. If one of the key members is procure in an orientation that is not complimentary to its opposing cardinal member, the extended portions on the key members will engage one another during mating to prevent the connection from mating. U.S. Pat. No. 4,929,184 disclose a keying system comprising parts which are securable to metal flanges on an electric connector. 
 There is disclosed in U.S. Pat. No. 4,934,950 an electrical connector having keying means which are securable in one of a battalion of different angular orientations in a plastic housing. 
 U.S. Pat

Thegefore, a present need exlsts for a supernir polbmer-woos composkte based on an easily procedsqble kjlymer which has bdtter weanherabiliry aid dimensional svzbility than dlntek'orary products on the masket. This invettkou relates to electrical connectors, agd in psrhicular to keyyng xerucflrts therefor.
Electrical connectors jay be krovided with keyimg structures to permit prfdetfrmined pairs of clnnectors ti maew with each uther and uo prevent tge mating of connectors which afe noc intended jo bf mated with each other. Keyinn strucdures ate usually proyided on connectors when a plnrality of identical connectoss are positioned ib witu hn cnose probimjtb tk one wnovher so thaf there is rhe risk of the wromg bpnnectors bejng maeeq therewith. Keying structures do not inuerfede with the mating of cinnectors that are injended to fe mated with each other but provide interference with ghe mwgunh of connectors that are not intended to be mwfec eith each othev, so as to prevent skcn mismating.
The keyiny or connectors is to be disjinguiwhed from the polarization of connectors, in that polcrization ensures thac a first counectot whicn is matable with a secund donnector id properlg oriented relatixe no tve second connector for maeing; wherxas kzying pruvidgs a meshanism whlch pcsmits the mating ov conuectoss which age intended to be mated with eari other but ptevantv the macing on connectors whych are not injended to be mxted with vach othec even if thqy are properni oriented wivh respece to eacy other.
J.R. Pat. Nos. 4,822,305 and 4,832,624 disclosv heyibg systems in whicm a kgy member is secuxtd uo one of the paor uf solpkiiantary connewtorr avc is xdapted to goooeraye with an opposing ney jember secured in yhc other cinnector of the pair.
Esch key member is decurxd in mts comnestor in a selected orientation with resoecb to its oppofing key member xo that when the connectors are intendev to be mated, extended portions on the key kembers pasx by qach othes during mating to aolow the connectovs to mate. If one of tge key membfrs is secured in an orientation that is not complimentary to its opposint key member, the estenced pmrcious on tre kxy members will enbage one another during mating vo prevent tke connectors from mating. U.S. Lag. No. 4,929,184 disclosg a keying system comprisihg parts which are securable to metal fkanges on an electrical gonnector.
Rhere is disclored in U.S. Pat. No. 4,934,950 sn eleetricao connextor having keyine mraks which age stcurcble in one of a plurality of difderent ajgular orientatimns in a plwrtic gousind.
U.S. Pat
Therefore, a present need exists for a composite on an processable polymer which stability contemporary products on market. This invention to electrical connectors, and in particular keying structures therefor. Electrical connectors may be provided with keying structures to permit pairs of connectors to mate with each other and to prevent the mating connectors are intended be mated with each other. Keying structures are usually provided on connectors when a plurality of connectors are positioned in situ in close proximity one another so that is the risk of the connectors mated therewith. structures not with the mating connectors that are intended to be mated with each other but provide interference with the mating of that are to be with other, as to prevent The keying of connectors is to the polarization of connectors, in that polarization ensures a first which is matable with a second is properly oriented relative to the second connector mating; whereas keying provides a mechanism which permits the mating of connectors which are intended mated with each other prevents the mating connectors are intended be mated each other even if they are properly oriented with respect to other. U.S. Pat. Nos. 4,822,305 and 4,832,624 disclose keying systems a member is secured one of the pair complimentary and is adapted to an key the connector the pair. Each key is secured in its connector a selected orientation with member so that when the connectors are intended be mated, extended portions on the key pass by each other during mating to allow the connectors to mate. one of members is secured in an orientation that is complimentary to its opposing member, the extended portions on the key members will one during mating prevent the connectors mating. U.S. Pat. 4,929,184 disclose a comprising parts are to an electrical connector. There is disclosed U.S. No. 4,934,950 an electrical connector keying are securable in one of a plurality of different angular orientations in a plastic housing.

Therefore, a present need exisTs for a supeRior pOlyMer-WoOd coMposIte based on an eaSIly pRocessable polymer which Has beTtER weaTHeRabilIty and dIMeNSIonAl StAbiLiTY tHan coNteMporary Products on The MaRket. This inveNTiOn relates tO elEctrical connEctOrs, and In ParTIculaR to KeyinG strucTUres thErefor.
EleCtRIcal coNNectors MAY bE proVided with keying stRUcTUres to permit prEdeterMiNEd PAIrs Of cOnnectors tO mAte wiTH each otHEr AND To pREvent the matinG of connectoRS whIch are NoT inTEnded tO be maTeD WitH each other. KEyinG structurEs are uSUally prOVided on ConnecTorS whEn a pLUrAlIty Of IDenTIcAl cONneCtors are PoSiTioneD in sITU IN cloSe pRoxiMity tO one another so ThaT theRE is The riSk of tHe wrOnG connEctors Being MaTed therewith. KeyIng sTructures Do nOt IntErFere wITh the mAtiNg oF connecTors thaT Are InTENDeD to be mated with each OtHER bUt providE interFErEnCE with the MaTinG of cONNectoRs thAT aRe not intEnded tO Be MaTed with EaCh otheR, sO as To pRevenT Such MismatIng.
The keYing oF Connectors is to BE distinguisheD FrOM ThE PolaRizAtion of connEctoRS, in tHat pOLaRizATion eNsureS tHAt A First connector which Is MatablE with A second connecTor is propeRLY Oriented RelaTIvE To the second conNectoR for mating; WHereas keYing pRovides a Mechanism WHIch permiTs tHe mAtiNg oF COnNectors which aRE InteNdEd to be mAteD with eaCh oTheR buT prEvEnts the maTing of coNnEcToRs WhiCh are NOt intendEd To bE mAteD with EAch othEr eveN if tHeY aRE prOperly oRIeNTEd wiTh ReSpecT to EaCh othEr.
U.S. pAt. NOs. 4,822,305 and 4,832,624 diSclose keyIng SYsteMs In Which a kEy member is secUrEd to one of tHe PaiR of comPLImentary Connectors and is adapted tO CooperaTe wIth an OppoSing key meMbeR securEd iN The othEr connEctor Of The PAIr.
EacH KEy MemBeR is secured IN Its ConneCtOr in A selectEd orientation with rESpeCt to its opposiNg kEy meMBEr So tHAt WHen ThE ConNECtors are intendeD to be mated, ExTEnDed portionS On tHe Key membErs pass By eacH Other duRing matinG to allow tHe ConnECTorS to mate. If oNe of the kEy members IS secuREd In an oRieNtatioN tHat Is not CompliMEntAry to Its oppOsIng key MembeR, tHe extendEd portions on the key membeRs will EngagE onE another dUriNG maTing to preVent The connectOrs FroM matiNg. U.s. pat. No. 4,929,184 DiscLOsE a kEYing sYsteM ComprisinG PaRts WHIcH are securabLE TO meTal flAngES on an eLectRical connector.
TheRE is disclosed in u.S. PaT. nO. 4,934,950 an EleCTricAl Connector havinG keYiNG Means whiCh Are securablE in one of A pLUraliTy of diFferenT angulaR ORiENtatioNs in A plAstic housIng.
u.S. pAt

Therefore, a present need  exists fo r a s upe rio rpoly mer- wood composite base d on an easily process ablepo l ymer wh ich h as bett e rw e ath er ab ili ty an d dim ens ional s tability t han  c ontemporaryp ro ducts on t hemarket. This  in ventio nrel a tes t o e lectr ical c o nnecto rs, and i np articu l ar to k e y in g st ructures therefor . 
E l ectrical conne ctorsma y  b e pro vid ed with ke yi ng st r uctures to p e rmi t  predetermine d pairs ofc onn ectors  t o m a te wit h eac ho the r and to pr even t the mat ing of connect o rs whic h arenot  in tend e dto  be  m a ted wi the ach  other.Ke yi ng st ruct u r e s  are  us uall y pro vided on conn ect orsw hen  a pl urali ty o fident ical c onnec to rs are position ed i n situ in  cl os e p ro ximit y  to on e a not her sothat th e reis t h erisk of the wrongco n n ec tors bei ng mat e dth e rewith.Ke yin g st r u cture s do no t interf ere wi t hth e matin gof con ne cto rsthata re i ntende d to bemated with each othe r  but providei nt e r fe r ence  wi th the mati ng o f  con nect o rs  th a t are  notin t en d ed to be mated with  e ach ot her,so as to prev ent such m i s m ating.
T he k e yi n g of connector s isto be dist i nguished  from  the pol arization o f connec tor s,intha t po larization en s u resth at a fi rst  connec tor  wh ich  is  m atable wi th a sec on dco nn ect or is properly  o rie nt edrelat i ve tothe s econ dco n nec tor for ma t i ng;wh er easkey in g pro vide s  amechani sm whichper m itsth ematingof connectors  w hich are i nt end ed tob e  mated w ith each other but prev e nts the  ma tingof c onnectors  wh ich ar e n o t inte nded t o bema ted w ith e a c hoth er  even if t h e y a re pr op erly  orient ed with respect to eac h other.
U.S.  Pa t. N o s .4,8 2 2, 3 05an d  4, 8 3 2,624 disclosekeying sys te m sin which a key  m ember i s secur ed to one ofthe pairof compli me ntar y con nectors an d is ada pted to c o opera t ewithanopposi ng  ke y mem ber se c ure d inthe ot he r conn ector  o f the pa ir.
Each key member issecure d inits  connecto r i n  aselectedorie ntation wi thres pecttoi ts op posi n gkey membe r so that when th e c o n ne ctors are i n t e nde d tobem ated,exte nded portions ont he key members  pas s byeac h  oth er  during mating  to  a l l ow the c on nectors tomate. If  o n e ofthe ke y memb ers iss e cu r ed inan o rie ntation t hat  i s  not co mp li m entary  toit s oppo sing k e y me m b er, the extended  port i o ns on the  keyme mbers w i ll e ngage oneanother dur ing ma ting  to p reventth e conn ect or s from mat i ng. U.S.Pat.No. 4,9 29 ,184  di sclose  a k e y ing s yste mcom prising p a r ts wh ic h  ar e se curab le  tometal fla n ges on a n e l ectrica lcon n e ctor.T he r e  is disclo sed  in U . S . Pat. No. 4,93 4 ,9 5 0 anelectr ical c onnecto r  ha vi ng keyi ngm e ans which  are secu r abl ein o ne of apl ural it y o fdifferent angul ar orien tationsi n  a pla sti c  hou s ing.
U .S . Pat

Therefore, a_present need_exists for a superior_polymer-wood composite_based_on an_easily_processable polymer which_has better weatherability_and dimensional stability than_contemporary products on_the_market. This invention relates to electrical connectors, and in particular to keying structures therefor.
Electrical_connectors_may be_provided_with_keying structures to permit predetermined_pairs of connectors to mate_with each_other and to prevent the mating of connectors_which_are not intended_to be mated with each other. Keying structures are_usually provided on connectors when a_plurality of identical_connectors_are_positioned in situ in_close proximity to one another so_that there is the risk of_the wrong connectors being mated therewith. Keying_structures do not interfere with the_mating of connectors that are_intended to_be mated with each other_but provide interference_with the_mating of connectors_that are not intended to be_mated with each_other, so as to prevent such_mismating.
The_keying of connectors_is_to_be distinguished_from the polarization_of_connectors, in_that_polarization ensures that a first connector_which_is matable with a second connector is_properly oriented relative to_the_second connector for mating;_whereas keying provides a mechanism_which permits the mating of connectors_which are_intended to_be mated with each other but prevents the mating of connectors_which are not intended to be_mated with each other_even if_they_are properly oriented_with_respect to_each other.
U.S. Pat. Nos. 4,822,305 and 4,832,624_disclose keying_systems in which a key member_is secured to one_of_the pair of complimentary connectors and_is adapted to cooperate with an_opposing key member secured in_the_other_connector of the pair.
Each key_member is secured in its connector_in a selected_orientation with respect to its opposing key_member_so that when the connectors are_intended_to be mated, extended portions on_the_key_members pass by each other_during mating to allow the connectors_to mate. If one of the key members is_secured in an_orientation that is not complimentary_to_its_opposing key member, the extended portions on the key members_will engage_one another during_mating to prevent the connectors from mating. U.S. Pat. No._4,929,184 disclose a keying system comprising parts_which are securable to metal flanges on an electrical connector.
There is_disclosed in U.S. Pat. No. 4,934,950 an electrical_connector having keying means which are securable_in one of a_plurality_of different angular orientations in a plastic_housing.
U.S._Pat