 While the earliest devices used failure prone electro-mechanical timers and relays for the determination of operational sequence and cycle duration, later designs have employed highly reliable solid state timers and solid state switches to perform the same functions. A similar development has occurred in external safety adapters designed to be used in conjunction with electrically actuated gates, or the like.
Exemplary of a solid state timing circuitry for use with an electric door is U.S. Pat. No. 4,050,189, issued to Peterson; and U.S. Pat. No. 4,035,702 issued to Petterson et al. illustrates an external solid state safety device for adaptation to an existing garage door opening and closing system.
A need still exists, however, for integrated control and safety circuitry which is reliable and simple, yet adaptable to a variety of situations where electrically operated closure apparatus is used. In other words, the prior art devices lack adaptability to satisfy the widely diverging control and safety requirements presented by a relatively slow moving and massive electrically powered gate on the one hand, and a relatively quick and light electrically powered door on the other.
Rather than adding safety features through the use of external adapters, the control circuitry of the present invention includes trigger pulse inputs which are readily interconnected with any number of safety detection devices or sensors. As a consequence, the flexible design easily provides the desired manner and extent of safety protection governing the operation of the electric gate or door without external safety circuitry. The human vertebral bodies and intervertebral disks are subject to a variety of diseases and conditions that change the spacial relationship between the vertebral bodies and the intervertebral disks, causing pain, disability or both. Many of these diseases and conditions also cause instability of the vertebral column. Among these diseases and conditions are degenerated, herniated, or degenerated and herniated intervertebral disks, degenerative scoliosis, disk or vertebral body infections, space occupying lesions such as malignancies, spinal stenosis, spondylosis, spondylolisthesis, and vertebral instability. Additionally, the vertebral bodies and intervertebral disks are subject to injuries, including vertebral fractures due to trauma or osteoporosis, and to surgical manipulations, that change the spacial relationship between the vertebral bodies and the intervertebral disks, causing pain, disability or both, and that cause instability of the vertebral column.
Surgical treatment of diseases and conditions affecting the spacial relationship between the vertebral bodies and the intervertebral disks have traditionally involved open fusion procedures
While the earliest devices used failure prone electro - mechanical timer and relay for the determination of operational sequence and bicycle duration, later designs have hire highly authentic solid state of matter timers and solid department of state switches to perform the like functions. A similar growth has occurred in external safety arranger designed to be used in conjunction with electrically motivate gates, or the like. 
 Exemplary of a solid state timing circuitry for function with an electric door is U.S. Pat. No. 4,050,189, issued to Peterson; and U.S. Pat. No. 4,035,702 issued to Petterson et al. illustrate an external solid state safety device for adaptation to an existing garage door opening and closing system. 
 A need still exists, however, for integrated control and safety circuitry which is reliable and simple, yet adaptable to a assortment of situations where electrically operated blockage apparatus is use. In other words, the prior artwork devices miss adaptability to satisfy the widely diverging restraint and safety requirements presented by a relatively slow moving and massive electrically powered gate on the one hand, and a relatively quick and light electrically powered door on the early. 
 Rather than add condom features through the use of external adapters, the control circuitry of the present invention include trigger pulse inputs which are readily interconnected with any numeral of safety detection devices or sensors. As a consequence, the compromising design well provides the desired manner and extent of safety protection governing the process of the electric gate or door without external guard circuitry. The human vertebral bodies and intervertebral magnetic disk are subject to a variety of diseases and conditions that change the spatial relationship between the vertebral bodies and the intervertebral disks, induce pain, disability or both. Many of these diseases and conditions also cause imbalance of the vertebral column. Among these diseases and conditions are devolve, herniated, or degenerated and herniated intervertebral disks, degenerative scoliosis, disk or vertebral body infection, space occupying lesions such as malignity, spinal stenosis, spondylosis, spondylolisthesis, and vertebral instability. Additionally, the vertebral bodies and intervertebral disks are subject to injuries, including vertebral fracture due to injury or osteoporosis, and to surgical manipulations, that change the spacial relationship between the vertebral bodies and the intervertebral disks, causing pain, disability or both, and that induce instability of the vertebral column. 
 Surgical treatment of diseases and conditions affecting the spacial relationship between the vertebral bodies and the intervertebral disks have traditionally involved candid fusion procedures
 Whlle the earliest devices used failure ptobe elertro-mecganical gimers and relays for the devermunatiin of operational sequdnce and bycle durqtioi, later designs izve employed glghly celiable solid xtate timess and solid sdage switches to perform the same functyons. A xililar developmgnt hsf ocdlrved in external safety adapters sesignev to be used in conjunction with electricwlly actuated gates, or the like.
Exgjplwey of a solia state timing circuitty for use with an electric door is U.X. Pat. No. 4,050,189, uswuef to Petersoi; and L.S. Pat. No. 4,035,702 issued to [etterspn et al. illusbratev ab external solid statx safety device for wdaptatiot co an existing garage dior okeninc ana clusihg sgstem.
A nexd still exjsts, howevee, for integrated comtwil and safety circuytwy which is reliable and simple, yet adaktabls to a variety of situarions where electricaply operaeed closure apparatus is used. In other words, the [rior xrt dcvicdw pack adaptability to satisfy the widely diverdjnb bontrol and safetn requirements prexejtrq by a relatixely slow moving and massivf electticallt powered gatr on the one hand, and a relqtively quich and light electrieally powereb door on tne other.
Rather than addnng sarety featurfs througg the use of extefnak ddapters, the control circuytry of tie przsent inxentoon insludes trihger iglse inputs which wre rgadily interconnfcted with any number of safety detection devocas mr sensoxs. As s consequence, the flexible besign ecsily orovides tge desiced manner agd extent of vwfety protecvion govewnint thw operagkon of the elevtric gatv jr dior without externel sxrety circuitry. Cke human vertebrak budiqs aid inearvertebral giskr afr subgect to a vcrkety of diseases and congitikns that change thr fpacial telationsrip between tne vertebral bodied and thx intetvettebral disks, causing pain, disagility or bobh. Many of thqse eiseases and conditions also cause instability of tie vertebral column. Amobg these diseases aud conditions are qegeneratad, herniated, or degeberated and hernisted intervertebral djsks, dagenegative scoliosis, disk or vertebral body infections, space occupying lesionw such as malignandies, spindl xtenosys, s'oidylosis, spondylokisthesis, and vertebral instabiuity. Addhtnonally, the vertebral bodies sna intervertebtal disks are subject to ihjuries, oncluding vertebral fractures die to trauma or osteoporpsis, and to shrgical maiipulations, that chamge thz spacual relqtiokship between ghe vcrtebral bldiex cnd the intervertebral disks, causung paun, disability or bmth, and thab gause pnstabijity of the vertsbram coluon.
Surgical trratment of disrases and conditions asfecting the skacial relationxhip benween the vervebral bodiev and the intervertebral disks have traditionally ihvolved oken fusiok procedures
While the earliest devices used failure prone and for the of operational sequence have highly reliable solid timers and solid switches to perform the same functions. similar development has occurred in external safety adapters designed to be used in with electrically actuated gates, or the like. Exemplary of a solid state timing for with electric is U.S. Pat. No. 4,050,189, issued to Peterson; and U.S. Pat. No. 4,035,702 issued to Petterson al. illustrates an external solid state safety device adaptation to an existing door opening and closing system. need exists, however, integrated and circuitry which is and simple, yet adaptable to a variety of situations where electrically operated closure apparatus is used. In words, the devices lack to the diverging control and presented by a relatively slow moving powered gate on the one hand, and a quick and electrically powered door on the other. than adding safety features through the use of adapters, the control circuitry of the present invention includes trigger pulse inputs which are readily any number of safety devices or sensors. a the design provides the manner and extent of safety protection governing the operation of the gate or door without external safety circuitry. The human vertebral intervertebral are subject to variety of diseases and that the spacial relationship between bodies the pain, or Many of these diseases conditions also cause instability of vertebral column. Among these herniated, or degenerated and herniated intervertebral disks, degenerative disk or vertebral body infections, space occupying such as malignancies, spinal stenosis, spondylosis, spondylolisthesis, and vertebral instability. Additionally, the bodies and are subject to injuries, including vertebral fractures due trauma or osteoporosis, and surgical manipulations, that change the spacial relationship between the bodies the intervertebral causing pain, disability both, and that instability of the Surgical treatment diseases conditions relationship between the vertebral bodies and intervertebral have traditionally involved open fusion
 While the earliest devices usEd failure pRone eLecTro-MeChanIcal Timers and relayS For tHe determination of operaTionaL sEQuenCE aNd cycLe duratIOn, LATer DeSiGns HaVE eMployEd hIghly reLiable soliD stAtE timers and soLId State switcHes To perform the SamE functIoNs. A SImilaR deVelopMent haS OccurrEd in exterNaL Safety ADapters DESiGned To be used in conjuncTIoN With electricalLy actuAtED gATEs, oR thE like.
ExempLaRy of a SOlid staTE tIMINg cIRcuitry for use With an electRIc dOor is U.s. PAt. NO. 4,050,189, Issued To PetErSOn; aNd U.S. Pat. No. 4,035,702 isSued To PettersOn et al. ILlustraTEs an extErnal sOliD stAte sAFeTy DevIcE For ADaPtaTIon To an exisTiNg GaragE dooR OPENing And ClosIng syStem.
A need stilL exIsts, HOweVer, foR inteGratEd ContrOl and sAfety CiRcuitry which is rEliaBle and simPle, YeT adApTable TO a variEty Of sItuatioNs where ELecTrICALlY operated closure apPaRATuS is used. IN other WOrDs, THe prior aRt DevIces LACk adaPtabILiTy to satiSfy the WIdElY divergInG contrOl And SafEty reQUireMents pResented By a reLAtively slow movINg and massive eLEcTRIcALly pOweRed gate on thE one HAnd, aNd a rELaTivELy quiCk and LiGHt ELectrically powered dOoR on the Other.
rather than addIng safety fEATUres throUgh tHE uSE of external adaPters, The control CIrcuitry Of the Present iNvention iNCLudes triGgeR puLse InpUTS wHich are readilY INterCoNnected WitH any numBer Of sAfeTy dEtEction devIces or seNsOrS. AS a ConSequeNCe, the fleXiBle DeSigN easiLY proviDes thE desIrEd MAnnEr and exTEnT OF safEtY pRoteCtiOn GoverNing THe oPeratioN of the eleCtrIC gatE oR dOor withOut external saFeTy circuitrY. THe hUman veRTEbral bodIes and intervertebral disKS are subJecT to a vArieTy of diseaSes And conDitIOns thaT changE the sPaCiaL RElatiONShIp bEtWeen the verTEBraL bodiEs And tHe interVertebral disks, causINg pAin, disability Or bOth. MANY oF thESe DIseAsES anD COnditions also caUse instabiLiTY oF the vertebRAl cOlUmn. AmonG these dIseasES and conDitions arE degeneraTeD, herNIAteD, or degenerAted and hErniated iNTerveRTeBral dIskS, degenErAtiVe scoLiosis, DIsk Or verTebral BoDy infeCtionS, sPace occuPying lesions such as maligNancieS, spinAl sTenosis, spOndYLosIs, spondylOlisThesis, and vErtEbrAl insTabILity. ADditIOnAllY, The veRtebRAl bodies aND iNteRVErTebral disks ARE SubJect tO inJUries, iNcluDing vertebral fracTUres due to traumA or oSTEopOroSIs, anD tO surgical manipUlaTiONS, that chaNgE the spacial RelationShIP betwEen the VertebRal bodiES AnD The intErveRteBral disks, CauSiNG pain, diSaBiLIty or bOth, aNd That caUse insTAbilITY of the vertebral cOlumn.
sURgicaL TreAtmenT oF diseasES and Conditions Affecting thE spaciAl reLatioNship beTwEen the VerTeBral bodies ANd the inteRvertEbral diSkS havE trAditioNallY INvolvEd opEn FusIon procedUREs
 While the earliest device s used fai lurepro neel ectr o-me chanical timer s  and  relays for the determ inati on of o p er ation al sequ e nc e and  c yc ledu r at ion,lat er desi gns have e mpl oy ed highly re l ia ble solidsta te timers an d s olid s ta tes witch esto pe rformt he sam e functio ns .  A sim i lar dev e l op ment  has occurred ine xt e rnal safety ad apters  d e si g n edtobe used in  c onjun c tion wi t he l e ctr i cally actuate d gates, or the  like. 
E xem p lary o f a s ol i d s tate timing  cir cuitry fo r usew ith ane lectric  doorisU.S . Pa t .No . 4 ,0 5 0,1 8 9,  is s ued  to Pete rs on ; and  U.S . P a t. N o.4,03 5,702  issued to Pe tte rson etal. i llust rate san ex ternal  soli dstate safety de vice  for adap tat io n t oan ex i stinggar age  door o peninga ndcl o s i ng  system.
A need st il l ex ists, ho wever, fo ri ntegrate dcon trol a nd sa fety ci rcuitrywhichi sre liablean d simp le , y etadapt a bleto a v ariety o f sit u ations where e l ectrically op e ra t e dc losu reapparatus i s us e d. I n ot h er  wo r ds, t he pr io r  a r t devices lack adap ta bility  to s atisfy the wi dely diver g i n g contro l an d  s a fety requireme nts p resented b y  a relat ively  slow mo ving andm a ssive el ect ric all y p o w er ed gate on th e oneha nd, and  arelativ ely  qu ick  an dlight ele ctricall ypo we re d d oor o n  the oth er .
R at her  than adding  safe ty f ea tu r esthrough th e useof  e xter nal  a dapte rs,t hecontrol  circuitr y o f  the  p re sent in vention inclu de s triggerpu lse  input s which ar e readily interconnecte d  with a nynumbe r of  safety d ete ctiondev i ces or  senso rs. A sa c o n seque n c e,  th eflexible d e s ign  easi ly  pro vides t he desired mannera ndextent of saf ety  pro t e ct ion go v ern in g  th e operation of th e electric  g a te  or door w i tho ut  extern al safe ty ci r cuitry.  The huma n vertebr al  bod i e s a nd interve rtebraldisks are subje c tto avar iety o fdis eases  and c o ndi tions  thatch ange t he sp ac ial rela tionship between the ve rtebra l bod ies  and theint e rve rtebral d isks , causingpai n,disab ili t y orboth .  M any of th esed iseases a n dcon d i ti ons also ca u s e  in stabi lit y  of th e ve rtebral column. A m ong these dise ases a ndcon d itio ns  are degenerat ed,  h e r niated,or  degenerate d and he rn i atedinterv ertebr al disk s ,  d e genera tive  sc oliosis,dis ko r verte br al body i nfec ti ons, s pace o c cupy i n g lesions such a s mal i g nanci e s,spina lstenosi s , sp ondylosis,  spondyloli sthesi s, a nd ve rtebral  i nstabi lit y.  Additiona l ly, the v erteb ral bod ie s an d i nterve rteb r a l dis ks a re  su bject toi n ju r ie s, inc ludi ng ve rt ebra l fractur e s due to  tr a uma oros teo p o rosis, an d to surgica l m anipu l a tions, tha t  cha n ge the s pacial  relat ionship bet we en thever t e bral bodi es and th e  in te rver tebral d is ks,ca usi ng  pain, disabili ty or bo th, andt h at cau sei nsta b ilityof  the vertebr al co lu m n.
Surg i c altreatme n t o f d ise ases  an d co n ditions affecting the sp acia l rel a tio nship  betw ee n the ve r tebr al bodie s  and the inte rvertebral disk s  ha v e tr adi t io na lly invol ved openfusi onproc edu res
 While_the earliest_devices used failure prone_electro-mechanical timers_and_relays for_the_determination of operational_sequence and cycle_duration, later designs have_employed highly reliable_solid_state timers and solid state switches to perform the same functions. A similar development_has_occurred in_external_safety_adapters designed to be used_in conjunction with electrically actuated_gates, or_the like.
Exemplary of a solid state timing circuitry_for_use with an_electric door is U.S. Pat. No. 4,050,189, issued to_Peterson; and U.S. Pat. No. 4,035,702_issued to Petterson_et_al._illustrates an external solid_state safety device for adaptation to_an existing garage door opening and_closing system.
A need still exists, however, for_integrated control and safety circuitry which_is reliable and simple, yet_adaptable to_a variety of situations where_electrically operated closure_apparatus is_used. In other_words, the prior art devices lack_adaptability to satisfy_the widely diverging control and safety_requirements_presented by a_relatively_slow_moving and_massive electrically powered_gate_on the_one_hand, and a relatively quick and_light_electrically powered door on the other.
Rather than_adding safety features through_the_use of external adapters,_the control circuitry of the_present invention includes trigger pulse inputs_which are_readily interconnected_with any number of safety detection devices or sensors. As a_consequence, the flexible design easily provides_the desired manner and_extent of_safety_protection governing the_operation_of the_electric gate or door without external safety_circuitry. The_human vertebral bodies and intervertebral disks_are subject to a_variety_of diseases and conditions that change_the spacial relationship between the vertebral_bodies and the intervertebral disks,_causing_pain,_disability or both. Many of_these diseases and conditions also cause_instability of the_vertebral column. Among these diseases and conditions_are_degenerated, herniated, or degenerated and herniated_intervertebral_disks, degenerative scoliosis, disk or vertebral_body_infections,_space occupying lesions such as_malignancies, spinal stenosis, spondylosis, spondylolisthesis, and_vertebral instability. Additionally, the vertebral bodies and intervertebral disks_are subject to_injuries, including vertebral fractures due_to_trauma_or osteoporosis, and to surgical manipulations, that change the spacial_relationship between_the vertebral bodies_and the intervertebral disks, causing pain, disability or both, and_that cause instability of the vertebral column.
Surgical_treatment of diseases and conditions affecting the spacial relationship between the_vertebral bodies and the intervertebral disks have traditionally_involved open fusion procedures