1 695 '428 Whic@ h @ , l - - t h e b r e i @ C , tlip Pllev @v ,,.hip.gp Ijigs,thq -p t'cl b at- c@the said "ch o' a,ten.,engaging; iiR--Itliis caM - QP@]@4@ ,.,Y qn --,eojp@s,,agg @t'. t v e x n .;clehr, y' A- aild'tl-.ere y, li@-4i-ts, t. is op,e@-'4tlo4 b eiR g to 1-6.' f 'Rf i@ bree6h-- s@@,r@IN,. .,ve., a .,c b said t4e 6,@',41ik piii,-D@ t b s-ITe - ,, .- y ai@g@C. qpq . - I o -tli@ "@t' 4' 70 'T ni U ly @t its @de@,d centre posi iq 'd' b br ,ai@ is@@s-iewn:@ r e e e i n i e c a ee,cli sqrq y V c4r@,A@r, i@ p,@,, o n tl l' e ' h I rts@,ire motili The @@'find@-,r E a,@d its ass6@liat@c pal 10 shenvn a@ being con,,3tructed g6ner@lly.in the screw 6@eratina sh@ft li@olinted in the @ @ 7 5 er de cribed in the specifiefiti@n of p-L-irier, a cylin(16r and -pisio@ attached I mann 6 British Patent No.@ 205522 with reference tliclinally t,o the gun on the same side as r c rrier ind except tlltlt, forward of@ tl-ie el,ii-rier fi@@ge,l a, c@aiik to the: a ' -swinuing cyl er, the poi-t e tlii@ougl.L -v@hicli.th6 pressui-e fl@iid enters the cylindei, to 6ffect th@,closii@o- i-noN,ef le mech@inism 1 '7rne(I in ineiit o tl breech: s f6i the cylinder wal.1, this i3ort bel@n@i pr-ovided witli a ball tl-irottle valve ex as @fes-,ribed in tl-ie, a.id prior specification.: It @vill be seen 2o that as the cylinder occupies a fixed posit,i@ii on the gun the pressure fluid coniiedtions Ex El, are of a 8imple character in 66mparison ii,ith tl-ie - swivelling connectioiis nece@sal-V in. those oonstructions @in which a 13ivote4 25 cyliildei- is employed. F6r- hand 6peration of the breecii m@chanisal the@ aforesaid ci-ank, pin D' is rem6ved' as:is filso the aforesaid h6@izoili:a.l pivot pin e2 and the ullit composed of the, link E3, E4 E 2 ;@O and E--, is connected t6 tl-.ie Iidi@o- ba-r , by me.an @ Of IUUS 62,, e2x on th6 side the@eof throuali w,hich lijos and through the holes in the linlis E' i,@ the piiis e-,@and'Di @are passed as she-,vn in Fi-ure 10, it bei@g -Lin- : 35 derstood that t6 e@ect-ti-lis conne'etion tlie, to 0 unit composed of the said @ links is: moved 3. @In )u@,h a @ight n @i abou.t its longitudinal axis thr( aiigle. @ In the pos- . Ltion she by Fio,4re 10 tl-ie a wn a pric)jection el on' the link E5 ehgages beatin& -sha 40 tiveen t-",o @lu-s eG eG on the c@lincler E -and t and a swinging on said' @haf l@nk m ch@@ iiisiii thr6iio-li'-NN,Iiieh the.pistbn r6d @o sai( piston is 6oiine-.ted t6,tlie piii. 80@ .2. in, i)o@v;6r operat@d breecli ineehan,isiii -'Lor (yuns, a hinged c@rrier, ii breech s'cr'etecl@ on t-h transiTei@@p-'b're elli moliii e cariei@, a, -,ci,ew operating shaft iilotinted @in - ihe ca;i-i,ier @i c,ylin(ler and @iston 'attachect lonLyi--@@ S5 tudiii@lly to th6 atih -on tlie same. side as and@ bf'th@ carrier@ hinge, a cranit pi-n '01 on sliaff; a.. proj6ction on tb.6- carrier, inging t roug' @an'cl, a. sw, link ii@echanism hnwl-tich the piston rod, of said pi@ton,,is con-,- 90 nected to the craiijt pin said swingin@ iiiik@ ii,.echanism iii I-L@dino, a short linl- @ conli@c.ted to the .6r,@nk'pin and,.mLovin& be@iifd @ti@@ diirin(@ u projection@@ O'..i thp, 6ar@ier tiloclKin6@ dis'pla6eiiient of said sh6.rt link', i.,i- m6veinent 1191, h ;6@e-@i -Avli6teby, 90 bl,pen6n will ft6t@ ig t@@ - o@@.@ier ior o,uns; a 13cre moun I tec on s -crew-'oper@arrier,- M6@il@for t@tati@@ sliel'i aff ancl swino@i@o@ the there@by locks the piston El to -tli-e cylinder. carrier, and a. -,lovable latch on i:ite carrier - L i l l y A handlover H is then in@erted in an under coacting; @when the breecli, se@@w is f gu'de D3 in the oliter end o Gilt f the- @perat- Lini6eke@l With a proje@t,LOn On the@ sli-ia'I"t; 'to inu craiik@. sf-iaft D @aiid is se6ured in position )reverit -angill,@i- ilisplacenient-of the :br"eepil, 45 b - iieans.of a sprii-io- pluno-e.r H wfiieh enscrey@' - dliring liloveinents 6f thb y in tl-ie hole prenvi6usly oceii ied by the carrier.- oll e@ piii DL this arran 4. O@dhoiiiee breecl)- mechaiii@in as:@.jj-l@@:@ tl, e PO@i,et geai, and the claiiii .3 whei-eintile I.a-teli-i,@ iii6vocl fo@ d in @ing couple(! to the, operatin&,cr otit oi@coactin-o- rela-ti6ii @vitli the pi-o'@ t' ' j e c i o n r)O Itt the @,,.,,me ti.me. The sdid r is on @ the@ ope@atiiig sliaf t.- -A,t tl-ie fitled Nvith' a, s rinucoiiti-olled@ 'catch H2 c6rr6ct time@-,-by 9-.'c,,tm glloove iorniecl in a p ivhicli 6--Ligages wil@h @a@sto-p C' on the ca@rier br@cket@6n 'the 'brep-(@ii eiid 6f the --un incl i,etains the. handlever in the locked po- 5.,- Ordnaii6e @ br@o@h- me6lianism@ ds n. sit;.on iihtil released- by the hand @vh6n the claim 3- whei,6in th@ c@ai-ik i-)in on th@ breech r)5 handle of th6 said handlever is c,@rasped iii ser@-@@ olie@atin, el.gnii: -sh@ft, is ,rran--e,-l to oi-der io open ihe breech n@echa@ism it be- b6 hearl@ @,t ii,@-s@ dead -center position- i@o when, @ing see.-i fi6m Ficrui@es 9 aiid 10 that: this the @bre6ch E;6rei@ i@ fully iinl66ked, for@@the catch is moved (fonvn-vvards byidownward 1:)uipose,specified. movement of th6 Iiand iipoii the, saicl handle. @ 6. Ordna-.ioe breecli mecl,.ianism as in@ 60 k 1)art D4of the guide D3 co-operates with wh(@,reii@ tiio li@k n-i@6hani in.com,-,. p C2 cl; t125 the aforesaid sto] to limit@ tho 16ekiiio. prises in, ad ition io thd @ ' hort . @@link wo movement of the sliaft D ivhetlier. th6 l@ttler o-ti@er Iii@lis . interposed @ botiireeq, the saicl. is b(@ino- operated by po,wer 6r by -ihe liandshort li-fili: and a,,slidina b@k whicli ext:e@cl,@ lever A aiid@ the@ lat-ter has a, projection Hx to the front 6f th6@@6peratin& cylinder - ,vhere:@.-.

1.695,728 it is coniiected to the pli@'toh i-od -v@Tliich @r6jects ' t @hrough the front @end of th@ @sqid cylin er, @ubstanti,@tll as described@ IT. Ordnance @ryeecli mechanism as in claini il,wherein for hand operation of the br-e-e-chi-iie6hani,3m the @Nvingino- link medhdnisrri; is uncoupled frorn the breech screw opei-atin-o, craiik shaft'@and a hand le attached t6. flie @otlt-er eiici0 saici @shaf t ig secLi@6d in '@o@ition@ b'y @ spi-in6, pliinger lo englq,&Ies iii the h@le. 1:)reviously 6cei'lpied by the 6i.-aiik pin 6onndcting@the' link iiiech@nis-m to@@ the shaft, f6r the plir pose specified ARTIlUri. TREVOR DAIVSON. GE, ORGE THOMAS@ BUCKHAM.

Pateniecl I)e-,. 18, 1928. l@5 7:28 @p ;A'@T."E@-, N.. -T -D -IOXAS BUCKHAM, LON,ARTHUR TREVOR, AWSON@ ORI.'xD, Ti ASS @UNITED STATES OR-Di' wA@@- DON@ @ENGT@A@ND, @AlIT6t i@PAN-@r@ ',Up -IN-GTO-N, D@ISTRICT@OF,COLUMBIA,@A C-ORPORA-TION, OF V.IRGI-t\TIA. -'OR MAIV-CE@BREE IE' -A'@licatibii"fired-Sept.-@@hb6r"3,'@@'26, St'ti.d7l -No.@133@4O@, dnd in G-reat P' - a o t i t 10,n e@iAt6@,t6, 0 I', s A ll,v,e, -naing 'OR0 e cif@ ihe, y t,.oii @at tIlO 'aa@ sing e -,o,f @h-6,11tili@l@@havi-ns i:d @odm 6ii,.@rier type ftnd I Opel ati6:@s of th@ t b e pi fd -ossure fl-Lli(I op6-r4t"ihd. g @oo @e r-ttit@cl 'Iiiz @i;brd@k6t t 'f e'9'LLn -a r@'G @@lie r oin elb @@iii --of -th iti@@l or 5 i@lil-n-1. -Y'30 ort,ea 6ii )iie @,A;rm_ o 1-@tch@-a 'ano'Lil @'i)f th@e f -,e,.Y-o, o,in(y -,In, bii-66, -s'e-P-@ew@ t'he e@t 6f '-tl-i6 @roo@,e. Undiie Dr6s_ur@ 'h@ o' 6artier t-he cl@o@ing,m venien. dis,,51iftc6 mei@t@6f fh-1: isav6i@lea@bv t-htli@ alid-'tlle cra,,il 3:, pl@n,is@ b @@et-kVodii 80 tion - v@hen. t@6 brd h cro-W -is@iii--li-y -i ekecl titht - tl-i 0 @i iila!7 @6 @6f @so:z@tti' @ihe s , @ @ o n l y . , t 6 n :l tee o'p6i@.iftd-,@-move-- ranlt @pi - - ; t-his positi6ii Lintili t,@h@@ ''cain e b -ser@biv'lfiiti, @8: -in tli h: it groon -nt '6 e,@'d@ rtier nie f @h , @iidil@ o-P @o:Ai6vo@. ili6,lat@-c'h 2t6-- t lh,6- o i@ ,d the@ lid int ci 'Catrier I iat6s @l" th'e c@l@o'siiho- @lh-ovel@@6]@i.of tll@, e - a evice-,. comes. 6P ati6n to i@,iti I t of the lbel@,i:hg @@dis @lliceiiien el' i @te-7 th6 @:ingL,@li@r di@plac6,in e n t : - - o f : @ t l i b @ @ b r b j 3 c h - 'b'ree'o,h ser6@v. ]@ . -@ I.. : @:; :1 .I I I.- .@ @ @ @,t. 1; @ ; "tii Aci3oral-n o- the- t-io.-ik e:@,,'ioros t@id pl,,coii4eh@ boi the@ - iAov@- @@is;"Atth@hed' 16h iit oi@@tfi-6; @I!, 6 o - nel,pr6sgul aine, @i P, - fi'@id. Th6 E@said s 6;- 7( ,Is n - I L'6 OT 20 gun -oly- th-@ -s' @d @'4 16f - - - j , @lvi e; @the Iii-h'o.'e -pi-.i or spi,g,ot. a,nd'Ith a swi'- ,@igin,(r -0 't, -S-,h-or, :-I'@ ong!@r,- i@6nnee-te'@l@'ihrdtio,h t , iln@IK: rof ei,'k6 @l: t in i 1-tiec i,,tnism, to a -era,n i - pin -ans- linl<: -r6ilt v6r,s@ 6- br6,6i@h @6te;@ m6@['@.Apd en d of tfie n -eat z@nc coyi ar @BNCL n ri r.- ie- sai@-cl i-n iz -nee,q re 25 i th'o 6,f a s e - c o i l l c @ v e . - t -pliiiaii i:s r- pi, enc- con(, 0 the a@f 6iles @,ti u @th' -1 6f thi-,@4 @,7e -tlic iiio 61 tli6@"b@e' li li@@s b -Ilibl.,i2@oiitalY screw iii-oves 1 b-'OliinCT a i3iLhe i)in tb tli @eli@d 6f ti fi@arql!idi-ng:i i d , , c 3 0 - e v e - l i t t i a l l @ c 6 i l l e s @ t o p e a t by s ,I, cl p o - to he@ f ii6et C,@d t,6 tlie,-,T) ii(,-, jec ion; tli6 ei@i),a'o,diiierit - 6f _on @@roc 'WI "tlie, pilo.- L of th@-, i, iis- thi-6@io-h tlie'f@bnt., U1116elt6ci @iii6Vei-ii(iiilu Of sa,i',cl t-li essai-y tinlvlersa, I to th6 to - itie 35 tlle pi4oh i,@,)c I - - t t'@-t g o-sf if oii,@ tl-i6, i'TELI", - t,e,m fti -ni-,t l@ii @O-Di-- i'a -'!Iii6el,@Lte o.pen p . I I I ' -&6inent @vitl 6--q@ @c Lil'in-6, c .7 r,jao 'e,-i -n -@edri the @6!e'of tli,@ siv -L -7 ln'd'l - 'P'@O'@lt :o - ,],n6v e 6y 0 -a@.@ As @h6. @dicf P@6,je@ti6ii, d@6es ,I ixec -i3rosltw si,d ,the c rri@ep. I f th t , - i e r e t o 4a 'op-erat-e 'to p'ro'vent flui,d-- - t zn ,is 9( @he bi-'th 66i3li kre@v@- tc)'@N@ai@@ls -its ),osi- a-i e of. chal @@c@L,6r. in cbmparis'o;n- @wi - tion th6 the @wivelling, Connectio il@cess@@y cari-i@r, we pi@ovi:cle a ose'. aon,@tructi@6ns @in p h w-- i@ii2li t.@14 iv6t4l, Cy W146n th6 breecli::@@oi, ip; flilly iiiil6,clc,6d deiis empioyect., ew b e6@oli ni ing @.Wit @s@i, i.iio h @@fot6said 6p@iqting, cy-,ank - tli6 @loi,6 oppi-p 'th is , u i-icoup @e I , Ing ci@@ilili sh,@it in co@operation th6ti@wi I @'d tiie..@ dtirin the sWi-noin(@ riao@emei@ts;6i@@th6@:6br- @a le@6@l i@, att@ched@ t6,. tiie oiit@4 @,@-@d 9 rier so. a's'to pi,ev@"nt the @d-i-s@of th-e .6ijera@.@g by means o f acei,nent' of the @'br-@6@4i s6r6@v. -Ti@i8 zl.- ,ktoh @.lhttor .,tn I ,'eel- I" c i s ' s I r e c 0 0

1 695,728 in po@ition by a. sp@ing pluno-er eii- iiiner end of the saicl sliaft, til:e latter piia ree Li screw in i gages in the liol6 proviously o he s6i@ving to 6- per,,tte the b @ el cranl,- pin by ivhi6li'@tlie firs similar ma to that describecl and: @liowii said short links was con in tl-ie speci on anc, draivipo,,s of Britisli -i-atin r3 opi@ crai@l@: - qhaf t TI)is arrangen-ie Pat6iit No. 6739:of 1912. TO @vents@the po tl-ie haiid lev E s th6 operating cylinder and E'@ is the Pr( -wer gear aiid I from - beinu. cou lecl to tlie@@(?i:)eratinz era piston disposed in this cylinder, 'he said cylI zn p 'h,qft at tl-ie s--iiie tili,16.1 ii@de@ bein(, attac@l-ied 16noitudi-.iall@y to. the In orcier thlif the saicl@iiiv,- ,iition the same sicle as and slightly in@ front learly undei-stoo and@-r--tclilv@-carri CE pig c, d of trriej: hinoe s -ot aiia.the rod el of 75 ( - , - f f , 2 c t , i l l e s a m e @ v i l l n o % v b e ( f 6 s c r i b i , 1 , 1 . o r , - t h e p i s t o n E l p r o j ( @ , e t i n g t . l i r o u ( y h t h e f r o n t f u l l @ - N v i t l i i @ e f e r e n c e t o : @ t l - i @ e f a c c o l a y i n g e n d o f @ i L , e c @ l i n d e i @ ' w l i 6 r e i t i s ' c o n n e c t e d t o (Tr,, iieli :-- L ]@,@ I %vin-s i@ ivl the f-i-o,.it'@-na of a b-,t@ E.@ slidin@,, in (,ui(les @ i g t L , @ e ' l i s a r e a r e l e i , , @ i i o n o f t g i l n I ) i - o - ' o i i - t l , , e c l i n d e i . - E ' - @ l e i - e a i - e n d - i e s a i d A l i 4 e t i @ @ A v i t i , b i - e e c l i i l l e c i i t i i i s i i i i i i @ i c @ o @ d t p c e b , , i r i s c o i i i i e c t e d @ y a l i o i - i z o n l l a l P i N ' O t I ) i l l e , 2 8 0 - I N @ i ' U l i t i l i s i i i v e n t i o i i t h e i h e c l , . a , i - i i s l i i t o a , s l - , i o @ t o n n e @ t e @ l b i , a s c beino-.iii- tlie,clos6cl po@ition. A-ei,ticql y.)illl-otplli@e@@ion,loncreriinkE'. 'klie 2 is ,t plan of Figure I 1,,tt'Ler is coiinected b@ a I)Ivot Figure 3 is-@,t -s.--ctioiial side' o@ 11. pi ii el t,o a -nother' sliori' iii@k'!r4,5, tl-ic re,,Li- e'l-ici 20 d i-,rotil -i (Yllt II I't II -,I s-de@ of - v,,hich the 'afores,@id cr@nk 85 t@e 1,,,t e-,ve III e - i I 6 t@ I oi er,:@@ur pin D' on tlie:6ute,.L@ eiid of.@the@ transverse op--Figure 4 is a s n take.,-i appi@o:iimttt(@ly eratino- crad 1< @'3h,,Lft :D. Tllls'arrar@gement -Y un ers,,tl on tl-ie line 4 4 4Df FigLire 3, of l@@k-s i)i-@6vides the necess,,ti @v Figure 5 is. -,L secilion tal@- eii @ipproxiiiiately joiiit connee-tions to accomiiaodat6 th@ angu25 on the line 5, 5 of Fig@ir@@4' ill-ovenients (@T th@ er,,tnk. pin D@ ai-id Zhe go Fi-iire 6 is a @ vie t() @@i(yuk6 3swinginu movel-n-eiits@ o@ the carrie@r@ C diiii@g w,@IlE@ siuion of the e opera loT Avi@(,Y tiie.po pa@ts, wlien uhe th t' -i o@f the @i-eecli 6chanisi-n. C" lbreech screw is unlockeOL a befor-e ti-ie is the aforesaid projection o@ the, carrier tilis carrier is swun;o=@ out@, it bei assi-imed i2or projection ill@LiTilig @t @rocess -lilt@@ whicli tlie 5 30 the purpose of illtistratiiig arts i-nore @shoi-t link E io@6s dtiriii ihe tLnloc'king 91 p . ' 1, t, clearlv.' that tlie, carrier h-,s received the disl:)Ih-- enient the breeen;@screw as she@Nn ustial'small, 6p(@ning movenient iinder the in Figure 16 so -that after the, @ @So@esaid 'cam infliience of the aforesaid cal-i device device (ii@dic@@ted at F Fl)' has',conP- into FigL@re 7 is @a-v@iew sin-iiiir to -Fio-ure 3 operation tc, initiat@ the, swin-iiig-.oti'-'ii-ioiem in the f@Illy con@ihu@a plill oil IOU 35 sh6-@viii-- the b,--eecli lilecliani. men't of the@co,@rier, the open P-@osition, this fizLi!7e'beiiig dra-vVn on ti-le tin.ks by the @ f orivard mo:vem6lit of tli@ - l i p ] a smaller scale than Fioures 1. to 6 pisto,@i El - coi .6tes tlio swiia(@ink-6ut inoi,6- Figu-r,e 8 i@ a plan of Figure 7, ment of the carrier th-rou,@h the iiitermecLial.37 Fiatire 9 is'a view sin@il@tr -to Fiaur@ I b Lit@ OT jtl-ie linl@.c -E5 and the stoi:) C'. Tl-ie, flilly 4(i "@@,)aris in section@ f@1.16 of s,@Lin,-6i-it position of thd breee meci-ia- i i).-- wit@li II e9@ 9 h@ 'PA io-ul.e 2 by, Fi@ iiisiii i sh( illres @ aiid S. The elev,- ino-iii,,--in oveii@6nt of 14 1-iii-e 10 is i si d(, Liion of Fi(,-iii-e 9 the is cf - m v fected -wE -.7,eN cl froiii 'tli - iglli, 'L 10 El.(I IiION,elllolit f the e. Fl( t@ ljy tlte reai 0 slieniinb@ the -Titio- I'll)(I I)ist6n El @vhich i i i @ i , e i n e n t i s t i . - , L n i m i t t e d t o i n C o l l ( - f o i . "6@i o-@ tli,, b@e, cli@i rati e - jliecliaiiisirl-, @.the by ()f tli6 Iiiilr, r,,--, Avhiel-i ,it liu Figiii-e .11 is a. n talzeii I)ro tliii bear-.- agD@,,Ii@s@- tliL,'innei, o@L the -P e - i o i i C " oi-i tl-ie,liil6 11, li- 6f t@i @,ui-e 1 @00 i.-ecf,.Ss in tli(, pi-oi et - @nd this I)ositioli Figure 12 is a pproxiiii el 6@v at y is iiiaintaiiied Lintil-t,he bl--e,,,ch coii on tl@e line 19-, @12 of Fig.uie 11 -iiien ces t6 -h A;e@ to its @ io@ki iig' I)OSition iinder I 0 5 0 Fic,-6i-e 11- is a sectioti t-- I@en approximaeely t,f@e infl@encelof tlie.Eifore ,,ticl c,,tin device F, 1 1.@, -Z, . ., C2 ;I on'@tti6 line 13, 19 of Fio.ul..6 1,2, Fl-. As the sa-icl I)i@oject-ion @!6es not ol-)el.- TPio-iire 14 is It. view siliiil,,tr to Fi(yiire @i3 @tte@ to ,ingi@it@i(lisi)lad6 nt of the btit' sl-ienvinff the, p@ri-s in the po itioi.i they bi-eeel-i i6@vai-ds its 16cl6n.. - ositio 9 p @occupy %viieii the @breecli screw is iinl@ck-e@l clLirii@g ti@e swi@ giiig moveinen ts- of the cal-- and the breecli lyleel-ianisiii s@ s,",inging o,u,t, i@ier a latch or cateli G is pi@ov,ided foi- co-6p- 11- @( @ratin@ @ii ariii oi- projecti6n Dx moviiig 'k eratinu, ei,a I n FigiLille 15, is ,,L @local @ection t,,i e i o n the with tl-ie op 1--@ sliaft D cl 15 of Fi@ rLire 14. o,ing iiio N@einei lil@e 15 the @A@vin lits'@of tl@e carrier so ,iq A i,, tile br6ech rin- of the -un Bt t pi-event the, s,,),id ano@ular clisplac6,ment 'of Go breech sere-\i7 C tlip- @arri er q-yid C' tllle Ili the breech @erew. This latleli. oi@ Ctii6ll il@ i2.-, i,-),ot of the said cai,i,iei@. Dis the ti-,Lllsiiioved into -,n@t olit@ 6f, its opei.-.iti-,r6 positioii p ver.9e opel-,ttin- crank shaft mounted in t@ile at the correCL imes li@ i-olatibl@ to the oidertctrrier. D3- is @t e @. erdlik pin on tl-ie oiite@r tions ol' the @am devi@e F, Fl- by inean 6f end -of ti ei-,@tin ,Ii 'f t@. D 2 i@ the @a can-i, aroove a f oi-in6@l in- il br,,Lp-l@6t Iii-oj ect65 iis op IL . zn treec li@ ,ere%v act,ti aFln.. craii k l@)i n on the in& f r6m tb.e bieecli eii d of tli6 - Lin b@t @ve oii i,3 0