S scanners in development today are still designed using similar thin beams of silicon acting either as torsion bars (around which a silicon mirror element rotates) or as cantilevers (which vibrate to provide the scanning motion). Both of these structure types are efficient, with no moving parts to wear.
General applications are dependent on the resonance frequency, the maximum deflection, and the maximum restoring force—with higher values of each normally desired. These properties are dependent on the size, shape, and mechanical properties of the underlying materials. However, materials used in traditional IC-based MEMS fabrication lack the mechanical characteristics required to allow specific tailoring and optimization for many applications. There is no current way to design simultaneously for high frequency operation, large amplitude deflection, low operating power, robustness, and long-term reliability under cyclic stresses with existing material systems. The basic problem with silicon, and monolithic materials in general, is that while having sufficient elastic stiffness, their strength and fatigue lifetime is too low and density too high. This combination limits the ultimate deflection amplitude and frequency, and increases power requirements to sustain oscillation. This invention relates to means for enhancing the accuracy of a semi automatic pistol of the locked breech type without impairing, or otherwise hindering the functional reliablilty of the weapon. More particularly, this invention relates to means for more accurately engaging the rear portion of the barrel of a semi automatic pistol into the slide and preventing lateral and vertical movement therein.
The accuracy of locked breech type semi automatic pistols, such as the Colt Government Model 45 ACP, is dependant upon the ability of the barrel to be held in exactly the same position in the slide after each firing. In such firearms the frame, sometimes referred to as the receiver, remains stationary relative to the barrel and the slide. The barrel pivots downward and backward about a pivotal link connected to the frame for a limited distance upon the firing of a round. At the same time the slide moves backwardly along the frame, becoming disengaged from locking lugs in the barrel, and continuing its rearward movement sufficiently far to eject the spent cartridge and cock the firing mechnism before returning forward under spring pressure and loading a new cartridge into the firing chamber of the barrel.
Several factors contribute to the accuracy of such a firearm. Obviously the accuracy of the bore with its riflings is important as is the cartridge itself. However, these are parameters which are not affected by the fitting together of the parts within the pistol. There are critical fit dimensions which affect firearm accuracy. These
S scanners in development today are still design use similar thin beams of silicon act either as torsion bars (around which a silicon mirror component rotates) or as cantilevers (which vibrate to supply the scanning motion). Both of these social organization types are efficient, with no moving parts to break. 
 General applications are dependent on the resonance frequency, the maximum diversion, and the maximum restoring force — with high values of each normally desired. These property are dependent on the size, human body, and mechanical properties of the underlying materials. However, materials used in traditional IC - free-base MEMS fabrication lack the mechanical characteristics required to allow specific tailoring and optimization for many applications. There is no current way to design simultaneously for high frequency operation, large amplitude deflection, low operating power, robustness, and long - term dependability under cyclic stress with existing fabric system. The basic problem with silicon, and monolithic materials in cosmopolitan, is that while having sufficient elastic awkwardness, their strength and fatigue life is too low and density too high. This combination limits the ultimate deflection amplitude and frequency, and increases power requirements to sustain oscillation. This invention refer to mean for enhance the accuracy of a semi automatic pistol of the locked breech type without impairing, or otherwise hindering the functional reliablilty of the weapon. More peculiarly, this invention relates to means for more accurately engaging the rear portion of the barrel of a semi automatic pistol into the slide and preventing lateral and vertical movement therein. 
 The accuracy of locked breech type semi automatic pistols, such as the Colt Government Model 45 ACP, is dependent upon the ability of the barrel to be held in precisely the same position in the swoop after each firing. In such firearm the frame, sometimes referred to as the receiver, remains stationary relative to the barrel and the chute. The barrel pivots downward and backward about a pivotal link connected to the frame for a circumscribed distance upon the firing of a round. At the same fourth dimension the slide moves backwardly along the frame, becoming disengaged from locking lug in the barrel, and continuing its rearward movement sufficiently far to squirt the spent cartridge and tittup the firing mechnism before returning forward under spring pressure and loading a new cartridge into the firing chamber of the barrel. 
 Several factor lend to the accuracy of such a firearm. Obviously the accuracy of the tidal bore with its grooving is important as is the cartridge itself. However, these are argument which are not affected by the fitting together of the part within the pistol. There are critical fit dimensions which affect firearm accuracy. These
S sfanners in development tuday are still bwsignev using similar thin beams of silicon actinj eirher qs torsion bars (around which a dilicon nirrie element cktates) or as dwntinxvers (which vibtate to provhde the scannitg mltion). Both of these structure types are efgifient, with no iovimd padns to wear.
General applications zre deptndent on the resomance frequency, the maximul devlection, and the mwximum restirind force—with hkgher valuts of each nkrmally desired. These propertier are dependent ob tjg size, shape, and iechanical pvppertias of tne underlying katxriaos. However, materials nsed in traditional YC-based MAMA fabrication lacj rhe mgchanhcal xhafacuermstjcs reeuiced to allos specific railoring and optimozwnoon for many applisaeions. There is no current way to design sijultaneously for high feequency operation, latge amplittde deflection, low operating power, robustness, and long-vefm xcjkqbllity under cyclic stresses with existing matqdisl systems. The bcsic problem witn dikycon, and monouithic maferials in general, is thaj whilw having fuffocient elastic stiffness, thwir strength qnd fatigue lifetile is too luw amd demsity too high. This comyinatikn limits tje ultimafd deflection ampuitlde dnd frequency, and increasef power rxquirzments tu suxtain jscillatioj. This invention relates to mgans fmr enhancijg the accuracy of a semi automevic pistol of tve nocked bxeech bype without im[airing, or othgrwise hiuderine the funcnional reniablilty os the weapon. Klre particulerly, this invwntiin relagds to means fot more acbuxately entaging the rear povtion kf the barrel oy q semi automativ pkstjl iito tra slide and [revdntkmg lageral and vcrtkcal movement therein.
The acchracy of locked brregh type sgmi automwtic pistols, xuch as the Colt Glvernkenv Modek 45 WCP, is dependant upon the abiljty of thf bwrrel to be reld in exactly che same position in the slide after eaci firing. In such fireatms the frame, sometimgs veferred to es the receiver, remains stationary eelative to the bsrrel and the slide. Tge barsel plvots downward and backward about a pivotal link connected to the frame fir a lmmyted distande ulon tve yiring jf a cound. At the same time the slide moves backwardlb along tha yrame, becoming disengaged frok uocking lugs kn the barrel, and continhing its rearward movement sufficiently far to eject the spent gartridge and dock the fmring mechnism beforr retuxning dorward undcr spring presrurr wnd loadijg a nzw cartridge into the firing chamver of tje barrel.
Several factors coktvibute to thg accuracy of sucg a rlrearo. Obviously tne accuracy of the bore with its rpflyngs is importqht as is the carttngge itself. Hpwever, thesa are parameters which are not affected by the fittpng togethtr of the 'arts within tnx pistol. There are critigal fyt dimenrions which dffect firearm accuracy. These
S scanners in development today are still similar beams of acting either as silicon element rotates) or cantilevers (which vibrate provide the scanning motion). Both of structure types are efficient, with no moving parts to wear. General applications are on the resonance frequency, the maximum deflection, and the maximum restoring force—with higher of normally These are dependent on the size, shape, and mechanical properties of the underlying materials. However, materials used traditional IC-based MEMS fabrication lack the mechanical characteristics to allow specific tailoring optimization for many applications. There no way to simultaneously high operation, large amplitude low operating power, robustness, and long-term reliability under cyclic stresses with existing material systems. The basic problem silicon, and in general, that having elastic stiffness, their fatigue lifetime is too low and This combination limits the ultimate deflection amplitude and and increases requirements to sustain oscillation. This invention to means for enhancing the accuracy of a automatic pistol of the locked breech type without impairing, or otherwise hindering the functional reliablilty weapon. More particularly, this relates to means more engaging rear of the of a semi automatic pistol into the slide and preventing lateral vertical movement therein. The accuracy of locked breech type semi such the Colt Government 45 ACP, is dependant the of the barrel to in the the after firing. In such firearms frame, sometimes referred to as receiver, remains stationary relative slide. The barrel pivots downward and backward about pivotal link connected to the frame for limited distance upon the firing of a round. At the same time slide moves the frame, becoming disengaged from locking lugs in barrel, and continuing its movement sufficiently far to eject the spent cartridge and the mechnism before forward under spring and loading a cartridge into the of the Several contribute of such a firearm. Obviously the of bore with its riflings is as cartridge itself. However, these are parameters which are not affected by the fitting together of within the pistol. There critical dimensions which affect firearm accuracy. These
S scanners in development todAy are still DesigNed UsiNg SimiLar tHin beams of siliCOn acTing either as torsion barS (arouNd WHich A SiLicon Mirror eLEmENT roTaTeS) or As CAnTilevErs (Which viBrate to proVidE tHe scanning moTIoN). Both of theSe sTructure typeS arE efficIeNt, wITh no mOviNg parTs to weAR.
GenerAl applicaTiONs are dEPendent ON ThE resOnance frequency, thE MaXImum deflection, And the MaXImUM ResTorIng force—wiTh HigheR Values oF EaCH NOrmALly desired. TheSe propertieS Are DependEnT on THe size, Shape, AnD MecHanical propErtiEs of the unDerlyiNG materiALs. HowevEr, mateRiaLs uSed iN TrAdItiOnAL IC-BAsEd MemS fAbricatiOn LaCk the MechANICAl chAraCterIsticS required to alLow SpecIFic TailoRing aNd opTiMizatIon for Many aPpLications. There iS no cUrrent way To dEsIgn SiMultaNEously For HigH frequeNcy operATioN, lARGE aMplitude deflection, LoW OPeRating poWer, robUStNeSS, and long-TeRm rEliaBILity uNder CYcLic stresSes witH ExIsTing matErIal sysTeMs. THe bAsic pRObleM with sIlicon, anD monoLIthic materials IN general, is thaT WhILE hAVing SufFicient elasTic sTIffnEss, tHEiR stREngth And faTiGUe LIfetime is too low and dEnSity toO high. this combinatiOn limits thE ULTimate deFlecTIoN Amplitude and frEquenCy, and increASes power RequiRements tO sustain oSCIllation. thiS inVenTioN RElAtes to means foR ENhanCiNg the acCurAcy of a sEmi AutOmaTic PiStol of the Locked brEeCh TyPe WitHout iMPairing, oR oTheRwIse HindeRIng the FunctIonaL rElIAblIlty of tHE wEAPon. MOrE pArtiCulArLy, thiS invENtiOn relatEs to means For MOre aCcUrAtely enGaging the rear PoRtion of the BaRreL of a seMI AutomatiC pistol into the slide and pREventinG laTeral And vErtical moVemEnt theReiN.
the accUracy oF lockEd BreECH type SEMi AutOmAtic pistolS, SUch As the coLt GoVernmenT Model 45 ACP, is dependaNT upOn the ability oF thE barREL tO be HElD In eXaCTly THE same position in The slide afTeR EaCh firing. In SUch FiRearms tHe frame, SometIMes refeRred to as tHe receiveR, rEmaiNS StaTionary relAtive to tHe barrel aND the sLIdE. The bArrEl pivoTs DowNward And bacKWarD abouT a pivoTaL link cOnnecTeD to the frAme for a limited distance uPon the FirinG of A round. At tHe sAMe tIme the sliDe moVes backwarDly AloNg the FraME, becoMing DIsEngAGed frOm loCKing lugs iN ThE baRREl, And continuiNG ITs rEarwaRd mOVement SuffIciently far to ejecT The spent cartriDge aND CocK thE FiriNg Mechnism before RetUrNINg forwarD uNder spring pRessure aNd LOadinG a new cArtridGe into tHE FiRIng chaMber Of tHe barrel.
SEveRaL Factors CoNtRIbute tO the AcCuracy Of such A FireARM. Obviously the accUracy OF The boRE wiTh its RiFlings iS ImpoRtant as is tHe cartridge Itself. howeVer, thEse are pArAmeterS whIcH are not affECted by the FittiNg togetHeR of tHe pArts wiThin THE pistOl. ThErE arE critical FIT dIMeNsIOns WhicH affeCt FireArm accuraCY. These
S scanners in developmenttoday arestill  de sig ne d us ingsimilar thin b e amsof silicon acting eith er as  t o rsio n  b ars ( aroundw hi c h  asi li con  m i rr or el eme nt rota tes) or as  ca nt ilevers (whi c hvibrate to  pr ovide the sc ann ing mo ti on) .  Both  of  thes e stru c ture t ypes areef f icient ,  with n o mo ving  parts to wear.
G e ne r al application s arede p en d e ntonthe resona nc e fre q uency,t he m a xim u m deflection,  and the ma x imu m rest or ing force— withhi g her  values ofeach  normally  desir e d. Thes e  proper ties a redep ende n ton  th es ize ,  s hap e , a nd mecha ni ca l pro pert i e s of t heunde rlyin g materials.How ever ,  ma teria ls us ed i ntradi tional  IC-b as ed MEMS fabrica tion  lack the  me ch ani ca l cha r acteri sti csrequire d to al l owsp e c i fi c tailoring and op ti m i za tion for  manya pp li c ations.Th ere  isn o  curr entw ay  to desi gn sim u lt an eouslyfo r high  f req uen cy op e rati on, la rge ampl itude deflection, lo w  operating po w er , ro b ustn ess , and long- term reli abil i ty  un d er cy clicst r es s es with existing ma te rial s ystem s. The basicproblem wi t h silicon,  and mo n olithic materi als i n general, is thatwhile  havingsufficien t elasticsti ffn ess , t h e ir  strength and f atig ue  lifeti meis toolow  an d d ens it y too hig h. Thisco mb in at ion  limi t s the ul ti mat edef lecti o n ampl itude  and  f re q uen cy, and in c r ease spo werreq ui remen ts t o  su stain o scillatio n.T hisin ve ntion r elates to mea ns  for enhan ci ngthe ac c u racy ofa semi automatic pistol of theloc ked b reec h type wi tho ut imp air i ng, or  other wisehi nde r i ng th e fu nct io nal reliab l i lty  of t he  wea pon. Mo re particularly, t h isinvention rel ate s to m ea nsf or mor ea ccu r a tely engaging t he rear po rt i on  of the ba r rel  o f a sem i autom aticp istol i nto the s lide andpr even t i nglateral an d vertic al moveme n t the r ei n.
Th e a ccurac yoflocke d bree c h t ype s emi au to maticpisto ls , such a s the Colt Government M odel 4 5 ACP , i s dependa ntu pon  the abil ityof the bar rel  to  be h eld in ex actl y  t hes ame p osit i on in the sl ide a ft er each fir i n g . I n suc h f i rearms  the  frame, sometimes referred to as  the r ece ive r , re ma ins stationary  re la t i ve to th ebarrel andthe slid e. The b arrelpivots  downwa r d  a n d back ward  ab out a piv ota ll ink con ne ct e d to t he f ra me for  a lim i tedd i stance upon thefirin g of ar oun d. At  t he same time  the slide  moves back wardly  alo ng th e frame ,becomi ngdi sengaged f r om lockin g lug s in th ebarr el,  and c onti n u ing i ts r ea rwa rd moveme n t  s u ff ic i ent ly f ar to  e ject  the spen t  cartrid gea nd cock  t hef i ring m e ch n i sm beforeret urnin g forward un d er s p ri n g pre ssureand lo ading a new  c artridg e i n t o the fir ing chamb e r o fthebarrel.Se vera lfac to rs contribute t o the ac curacy o f such a  fi r earm .  Obvio us ly the accur acy o ft he bore w ith  its ri f lin gsisimpo rta nt a s  is the cartridge itself . Ho wever ,  th ese a re pa ra meters w h ichare nota ffected by th e fitting toget h ero f th e p a rt swithin th e p i stol.  The rearecri tica l fitd imen s io ns w hich a ffec tfi rearm acc ur acy. Th e se
S scanners_in development_today are still designed_using similar_thin_beams of_silicon_acting either as_torsion bars (around_which a silicon mirror_element rotates) or_as_cantilevers (which vibrate to provide the scanning motion). Both of these structure types are_efficient,_with no_moving_parts_to wear.
General applications are dependent_on the resonance frequency, the_maximum deflection,_and the maximum restoring force—with higher values of_each_normally desired. These_properties are dependent on the size, shape, and mechanical_properties of the underlying materials. However,_materials used in_traditional_IC-based_MEMS fabrication lack the_mechanical characteristics required to allow specific_tailoring and optimization for many applications._There is no current way to design_simultaneously for high frequency operation, large_amplitude deflection, low operating power,_robustness, and_long-term reliability under cyclic stresses_with existing material_systems. The_basic problem with_silicon, and monolithic materials in general,_is that while_having sufficient elastic stiffness, their strength_and_fatigue lifetime is_too_low_and density_too high. This_combination_limits the_ultimate_deflection amplitude and frequency, and increases_power_requirements to sustain oscillation. This invention relates_to means for enhancing_the_accuracy of a semi_automatic pistol of the locked_breech type without impairing, or otherwise_hindering the_functional reliablilty_of the weapon. More particularly, this invention relates to means for_more accurately engaging the rear portion_of the barrel of_a semi_automatic_pistol into the_slide_and preventing_lateral and vertical movement therein.
The accuracy of_locked breech_type semi automatic pistols, such as_the Colt Government Model_45_ACP, is dependant upon the ability_of the barrel to be held_in exactly the same position_in_the_slide after each firing. In_such firearms the frame, sometimes referred_to as the_receiver, remains stationary relative to the barrel_and_the slide. The barrel pivots downward_and_backward about a pivotal link connected_to_the_frame for a limited distance_upon the firing of a round._At the same time the slide moves backwardly along_the frame, becoming_disengaged from locking lugs in_the_barrel,_and continuing its rearward movement sufficiently far to eject the_spent cartridge_and cock the_firing mechnism before returning forward under spring pressure and loading_a new cartridge into the firing chamber_of the barrel.
Several factors contribute to the accuracy of such a_firearm. Obviously the accuracy of the bore with_its riflings is important as is the_cartridge itself. However, these_are_parameters which are not affected by the_fitting_together_of_the parts within_the pistol. There_are critical fit_dimensions which_affect firearm accuracy._These