[1]Patented Nov. 20, 1923. l9C494O9' UNITED STATES PATENT OFF@ICE* 013CAR E. DEPUB. OF CHICAGO, ILLINOIS. MOTION-PICTURE FILK-PR.INTING APPARATUS. Apl)lication Itled May 14,1921. Serial No. 469,418. l'o all whom it may conceiw: be subsequently cut into shorter lengths in 55 Be it known that 1, OSCAR B. DEPUE, a order to be de,- @eloped. citizen of the United States, and a, resid'ent - It is also well known that a single negaof Chicao-,o, in the county of Cook and State of Illino"i@,s, have invented certain iiew and iiseful Improirements in MotioiiI)icture @n p . . t. @ @.-X Fil - @in -Ing pp@i-at-us, o:r whicii the follo wing is a, specifi(.ation. This invention relates t-o iniproieinents in l@O mbtion picture film printing app,,trittus, and moi-c parti6ularl3, to a (leiice used iii connection with the printing apl)aratii,@ for automiatically controlli-nty t,lie intensitv of liglit used in the priiit@ino@eration a-% d@tentiined 1,3 by the natur@-, of tEe piettires to -be print(!(I. In the art of print,in- niotion pict,tire filiiis a process not unlike alat i-,sed in printing f i-om ardin@ary ph6tographic negatives is @mplo3,ed, alt-hough somewhat inon@ compflcated by reasori of the charaeter of the negaI ii-P, fil@m -",hicli is well knowd tO CODSioi of ,t Sti-il) 'olf celluloid-like -substatice of -reat len4,rth on ivhich ai@e negatin-ely pi,,,-Iiiced a intil@itude of smcill P-ictures, 'I'lie pro,-ess of transferring the pictures froni a T).egatiN7e, to a positive film is aca@omplislied by passiiig a, ileo,,ative film and a positi-*,e film in superosed relation in front of an aperttire !h light rays f roiii ft sotirce o f incandeseent la p, jtr m, are alt@ 0 the negative film. thiis reprodiicing the pictiires suc@essin,ely iipaii the seiisitizedsurface of tlte positiv'e filrri. Tjie negp,tive film may be of any desire(I longtli, 3.5 for ex 'ample, one thousand feet iii leiioth, in which case it would ordinarily be terrned a ,@reel." In the proeess of printing froni a negativ(film, it is fed from one reel throtigl-t tl,.e 40 priiit,ing al>paratits@ and i-eNi7btijid on anotlier i,eel, the lengtli of the filiti beiiig o@nlv limited bN, tiie size of tli@ reel that can be )ii.%, cx eiiientf3, liandled. Iii the ca@@a of the I)OSitive fitm, l@owever, the lengtli of filni wliielt can 45 be fed to the printing macliiiie is limited to a lenl,,th which can be COIlVeDielltly liandled in the developing inachine, it being tinderstood tha,t, a pa,;itive filiti, must be de@,eloped after it is printed. . Up to the piweiit tin-ie a, posi50 tive filrn of not over two hiindre(I feeti iii length could be succes.,,,ftillv (leveloped, so thaf aitliougli: a. y)ositive filui might,, be c on-tiiiuouslv%fed@t6,t-.@e. printin(,r.iii"i(@Iiine ln(i of tlie@sam@, lenzth as tlie. negitii,@@ film, it nlutst. tive film may contain different swnes taken it diffei-ent places and under different conditioins of ligbt. witli tlle result that a gm,,ater 60 intensity of light is required to print certain port,ions of the film tlia.n. is requ@ired l)-v otherq. The inteiisity. olf light requiied fo@ printino, i7a.rious @@grees of films have been blished well esta in practice so that it deC),:, vo,li,es tipon- the operator of 'a. pl,lnt'Ino@ Machine to -,Iiange the intensit3, 6f the li@lit to (- (..,rr@spond to the particular scenes thit are, beiiig print@ed. For instance, it is well establish ed that th6 ti.tle picture, requires a 70 certai n intensity of light iii order to produce ,i s4.arp and clear reproduction on the positivq fiin-i so that during the pri-nting o the titi@I a certain light intensity, wliieh may I)c ivpres ented bv the figure "8," is used. Im- 75 iiiediat p..Iv following t@he title, a scene taken oii the ocean is to be printed, in Nvhich case t lilrlit iiitensitv, represented by the figi@re "1!?" would be i@quired. For this purpose device s are used for autornatically ch,ong- 8o ing the intensity of the l,iglit I)y varying the amou nt of rc@,-,istance in tlie@ lamp' eiretiit. IlaviD g e w previously charted th filin itli reh sl,- ,,ct to t e, successive lilit iiiten sities re@ 'r qttired - durinr the priiatint@.o@erat,ioii,, varl- 85 ous rnothods are einployed, @o r auton-mtically cliangi ng the intensit,v as the successive ses,- ,nes are p-rinted. It is to a device of this cliaractei@ that the prese nt invention relates, -the n(>vel :(-eatures 90 thereo f being hereinafter;descri@@ed in detail and iii eonnection with the aceckmpanyinz draivings, in, which i is a view in f ront elevation of the esLIg @ial part of a, printing:,app'arittiis and 95 t@lie liglit, intensitv controlliii- device @used ,,junct in co ion tl@erewith,, Fig. 2 is a view in rear elevation'of the liglit. intensit-y. eontrollinw device@, sli(wi'ng tlio ol)erating parts thereof. ioo Fig. 3 is a view iri: - vertical@@ section of the ligh, ro ng device,@ as taken on line 3 of @cozit Hi 3, i . 21 Fig@ 4 is:a, view in@. iiorizontal ertion@ of the same'taken.Qii line,4,, 4 of Fig. 9,1 105 Fig., 5 i-,; 8, @viow: in'horizontal sectioii; taken througli.ai p6rtioxilof. the. printing appa,rat-us oii@ line,5,
[2]1,474,400 Fig. 6 is a fra.,-mentary view in frorit elevation of portions of the negative filin a-n-@d positive film showino, the n-ietliod emplo (ed 7 for indica,tino, the p o"ints in the positive Zlm where the sa"me is tc, be severed, and Fig. 7 i@s a vie-,v sl-iowing the opei@ative parts of the complete a-pp@aratusind the eleetric,,tl connections.therebetweeii shoivn (li agraminatimlly. 10 A preferable construction of an appai-atiis embodying the features of the invention combines the printing tpparatus an([ the light intensit controlling,, apparatus in a singyle unit, altiough if desired, the t-%vo I)arit-, 1.15 of the complete apparatus iiia3, be entirely independentof one anoth6r and oiily conn -a nected electrically. The pri ting a pai US is disclosed only in part, the poi-tio s -svhicli co-o@erate with the light controlli 20 being only illustrated, i.-iamely, avert c 1 forming the front - ,vall of a c housing within which is ciielosed a, soiirce ()f li-ht, such as an incandescent lamp L. The pl@to 1 is provided Nvitli a vertical film 25 guide formed betweeii two guide plates 2, 2, setving to guide a negati-,,e filiii N aii(i 'a' superimposed po,,itive film I' iii a (]oNi,nward direction parallel to the plate I aiid iii front of a rectangtilar apertur'e 3 corre30 sponding in shape and size'to the india,idtial pictures oii the negative. In a complete apparatus, a liinged door is tistially motiiited at one side of the groove an(I covei-s the film throug'liout the poi,tioii imiiiediately adjacent,the aperture 3. From the disclostire, it will be seen tli'at if the iiegitii-e an(I I)osi@tive films a-re fed contintiousl@, ill fi-ont of the aperture, the liglit rays fro'iii the lanip L will print a photolraplile iiiipression ii,[)on 40 the positive film in accor-dance with the ivell known photographic process. A vertical frame,, consisting c)f tipi-iglits 4 and cro s members 5, (these inembers Deill(r preferably angle bars joinecl together) forii.is 45 a support, not only for the printing apparas tus already'parti@lly,desei-it- so for the light controlling device now to be described in detail. - The frame supports at its up-per ciid a panel board 6 of iiisiilatiiig ma60 terial and resemblino, somewliat the pa@el of anelectricalswitchboard. Mouiitediipontlie panel and extending tlirougliotit the entiiie length thereof is a pltirality of liorizontal bars 7, clearly slioivn in Figs. 3 and 4 as sqtiire. iii 55 cross-sectional area and secured at t-lieir eiids to the vertical edges of the panel I)oar(I 6 bv iiaeans of scre,,irs 8 and iiiternLediate sl)acin 9 blocks 9. SliZIably nioiinte(l. on eacli of thesl, bars is a inetal strip 10 of a len,-tli .@iil)stan60 tially one-lialf that of the associatea I)ar 7, each strip lyinflatwise a-ainst tl-ie oiiter face of its siipporting ba@ 7 an(I liavingtaniped tliereon a series of nuiiibers 11, say from 1 to 12, ai-i,anoed fi-oni riglit to left, o6 that is, from 'the inner end of the stril) to the outer end. TI-iese strips 10 are iiiolinte(i i-i on the bars by meaiis of sleen-es 12 seclii-e(i at the ends of each stri aii(I stirrottii(iiii,)- said bars. The outer eill t.1 (-, of eacli st@i.p i,4 preferably beiit outwardly to forin a li@in(lie 70 13 which niay be iised in slidin(r the stril)s in-@vardly aild outwardli@ alonotlic@ bai-. Iiiimediately behiiid the '@'Irs i aii(.1 iii(iiiite(t iipoii the paiiel board 6 is a I)ILII',Ility f COIItact bars 14 exteiidiiig i-erticallv aiicl at. i,i,,-ht, 7,5 angles to the horizontal bars i4. Ttiese bal-s 14 extend lengtliwise throtigliotit the liei,)-lit of the board 6 ancl. are insulated froiii et(-Ii ofher by intermediate sti-ips of lnsitl,,itiii(,- iiiaterial 15 -v,-Iiicli proje(-t t)eN,oii(I the stirface of-tlie contact I)ars aii(I sli, . Iitlv - sliowii iii. Fi,,. 4 rounded, as clearl3 tl-l TI@(@ col-iductor bars 14 are grouped closelv together and correspond in nuinber to tli . (@ iiiimei-icil desi(viiatioiis 11 appearin(,, oii tli(,@ 85 sliding strips 10. lii otlier Nyor(Is, foi- eacii designatioii oii the slidiiig sti,il) there is a correspondiii- coiitact bar 14. Nloiiiited ,it the outer eiicl of eacii slidiii(,- sti-il) 10 ancl (Iii-ectly coniiected to the sleeN,(@, 12 L t said go outer en(I is t contact j)ieiiiber or -Nvil)er 1(3 adapte(I in the moveii-if-,iit of et(-Ii ,@11(tiilg sti-ip 10 along the I)ai- to the contact I)ars 14. @Nfoitiite(t oii ttie I)ack of the I)anel boar(l. 6 is a rheostat R, the 9.15 saine @ei@g a i-i@ell kiioayii electrical (tei,ice ivliieh is inserted in all electi,ic,.il eiretilt for the piirpose of introdticitig diffei@ciit, deurees of i,esistance into said (-ii-etilt tliei-eb-v -,,ai-yiiig the aitiount of curreiit delinrere@l f rom i m the source of electrical eiiergy to the point of coiisumption. In tllis in,,tance the rlieostit R. as clearly shown dia(ri-aiiiiii,,itically iii Fi(-. coiisists of a series of i-esi,,,tiiic(-, iinit.-, 2, connected in series witli eacli other an(I 10r) eacli hnit coiiii4@eted -,vith ,t contact bar 14 by a series of condtictors 17 at terminals 18, as shoAi7n in Fig. 2. Oiif@ terniiiial of the rlieostat R is connectetl. bv means of a conductor 19 witli the lamp L so that the ci@ii.,- 110 rent delivere(I to one of the co'ii(Itictor bai-s 7 passes tlirougli the contact litir 14 ivitli wliieh it contacts aiid theiiee tliroiich the I-esistaiiee tinits i@ iii series NN,itli that liar. riiiis it Nvill be seen that the (-oiitact bai-s 14 are I I selective. that is, any oiie of the liorizolit,,Il condtictor bars 7 iiiav lian-e electi-i(!,tl coiinectioii with aiiy oiie @)f the coiit,,i(-t I)ars. (1(@- peii(Iiiig oil the 1)ositioii of tli(@ (-oiita(-t wil)er 16 associite(I witli sucti bai-. To (- oiiil)lete 121) the lamp cii,ctjit tlii-oiigli any ojie of the coiidtictor bars 7' a iiiovable or I)ro(,ressiN,e coni t-I tact iiieitiber 20 is emt)loye(l, tlle saiilt@ iiig the form of a iiietalli(, stiil) a(lal)te(t to travel iii a vertical patb iii cont-,t(!t witti the 12r) expose(I en(is of sai(t. coiiditet'or I)ai-s 7 (at the @iglit iri Fi . 1). Thi@.-, c(')iitact iiieziil)ttor -%viper 20 ii ffxe(l to a rectanguliir sliapect block 21 slidable upoii 1. vertical i-oct 22 fixed to the stipporting fi-iinie I)eliliid t,lie ].If)
[3]1,474,409 ai,p,l board 6. The contact memb6r 20 is also shown diagraiiimatically in Fig. 7, as weil as the rod 22 which has electricai connection at its lower end with a c I onductor 23 connected ivith the main circuit M of the apparat@s.on the positive side. The lamp circuit is completeci by @Lnother conductor ed on the negative side of th@ main circuit. 10 it is now manifest that the curren,t may be supplied to the laml) L throu(,Yb a circuit coriaprising the particular conductor bai-s 7 having (ontaet with the contaef member 20, 4nd the, selected contact bar 14 cletermine(i 1.5 I)y the position of the sliding stril) 10 of tli(conductor bar .!,. circuit. Inasmtieb as eacli coiiductor bar 14 varies in- its capacity to carry by reasgn o-f varyinamoitnts of resistance in series therewiti@ 20 tl,,e ct-urrent capacity of each contact bar mav I)e indicated by the position of the numbers on the sliding strips 10, such nuinbers also indicatin,r the degree. of intensitv of light emanatin(,- froin tlie, lanip L. Iii this man25 zier an intensity of light that will be obtitined when the contact member 20 contacts with the several 'horizontal bars 7 is (letei-miiied I)y the p,-)sition of each sliding .-trip 10 with kelation to a predete.rmined @,0 -i7ertical or "zero" line. -vn@ith wbich the sev, el-al ntimbers on said sliding strips will regi-ter. Tlius t)y moving the strips 10 along the bars 7 until the desired nuinl)eiregisters witii sucli ,t line, the intensity of ilic w e 23a extending froiii the lamp L ttnd coniiect- - sion on the tabulatiiig strip. Immediately lanil) wlien lighted ill cori-espond in d gree to that particular nurierical designatio-n. This line may be considered as the edge of a stl,ip of paper T, termed a tabulating strip,, which is prepared prior to the 40 I)rintinc operatiori in a manner liereinafter to be d@i-selosed, and secured in a vertical position ,nidway between the side.edges of the panel over the bars 7, there being provided clampq 24, 24 above and below the 45 I)aiiel into which the ends of the strip may I)e inserted and gripped. i@s a preferable constrtictio.n. a portion of the panel is covered by a sheet of insulating niaterial 25, which covei-s the riglit Iiand ends of the bars ,50 7 and serves to space the strip T away from tl)e bar,3. As I)efore siiggested, the strip T is pi-e1.)ared at the time the negatin-e film is being made iij) for the priiiting operatiop. As iG 55 (I learl@v shown in Fig. 1, the surface of the strip,T is divided into three, vertical col.iimns whicli in turn are stib-divided to form a series of divisions having a width .,;tibstaiitiallv eqiiil to that of a bar 'T, each 60 clivision coi@taining titree @I)aees, the one at tlij left liaving i ntizyieral therc@on indicitizig the (legree of iiglit intensitn, re(Iiiired, the central space 'iai,ing the matter of the film *ritt@,@.ii thereon- and the riglit@. 35 lian(I -, ice. havirg it ntiniber writteii therep@ on iridicating the number of feet of film oc.- cupied bv the subject. matter and to be priiite d @t the light intensity indicated in the left-liand space. The entire film is charte d in this manner, each change Of scelle 70 liaving its subject matter, light 'intensity, and length entered in a corresponding diviprior to the printing process the strid is applie d to thp, light regulatin- device 'ref- 75 p erablp with its lef@t-har@Ld ed7ge register.iiig ivith the corresponding edoe of the sheet of materi al 25 which thus may serve fis a guide for positioning the strip, T. , As a means for obser ving at a glance the position of the s,) conta ct niember @0, ivitli respect to the tabulating strip T, a poiiiter 20a is proi,ided as an extension of said member 20, the same pointin g to the particular.division on the strip. corresponding -to the bar 7. through E;5 wliieh the curjr6nt is passing. T he parts of the lityht inteiisity apparatus thus far described provide for setting the succe ssi-ve @conducto@ bars by moving the sliding conta(t strips 10 so that the liunibers fpi) on the '@.atter i-egistei- with the required light intensity entered on the strip T. Now, if the contact rhember 20 be placed,in contact witli the uppermost contact bar 7, and stiitable inecha nism provide(I for rele,,ising the same oi at the instant of eacli scene cliange, perinitting it to di-op into contact ivith the next bar below, it is obvious that instantancouc; chang es of light intensity will be effected throug liout the entire length of the Alm. iiio Such niechanism will now be described. It may b6 said generally that the movement of the contact member is in a doyvnward direction coiitacting with eacli bar 7 as it progresses,'the movement b-eing bv grav- 105 ity, so that the mechanisni eniployed is one Wiiich preferably releases the hlock 21 carrying the contact member 20, permitting the same to drop from one position to the next. The foundation of this iiiechanism is an elee- 110 tricall y controlled pawl and ratchet, - inclu'ding associated liarts as folloavs: Mounted on the rear side of the panel and exteiiding parallel to the rod '?.2 is an endlesa sprocket chain 26 carried on sprocket w.heels 27, 27, 11ri, the upper wheel being ii-iounted upon a shaft 28 journalled in a I)racket 29 and the lower sl)rocket wheel joiirnalled in a I)racket 30. To the inner lea(l o-f the sprocket cliain 26 the. sliding bl I ock 2'-) is fixe(l. A ratchet 120 wlieel 31 is also fixed to the sliaft '28 jouriialled in the upper bracket 29'and pii,()tally rfiounted ul)on an- arni 29"' tbereof is a pawl 32 wliicli in ttirn is connecte(i at the lower end of the armature 33. of a solenoid S .1 2r) MOUDted at the rear of the supi)o'rtin-, franie above the pa-%%,l and ratchet. The solenoid S (ionipi-i."- in addi-tion to the armature 33 it (,,,oil 34 adapted to be energized b:y an electric ciii-i-erit. tbii@, creating ele6tro-magnetisin .'30
[4]1,474,409 Ni,hich acts-on the armature 33 to draw it up@@ wardly iiito tlw, coil 34. The upward riioveiiient of the armaturo 33 acts to release the I)a-",l 32 I)ermitting the ratchet wheel 31 to advance the aiigiilar distaiiee between two teeth of tlie, ratchet ivlieel and i'n a clock@@vise (lirection iinder the, -%i-ei(yht exerted upon the sl)roeket chain bv the block 21 carrying the contact ii-ieiiiber 20. The spacing of the t'etli of the ratchet wlieel is such that the i-eleasing of each tootli by the pawl permits the coiltact member to drop down %vardly out of con'Lact witli a hol'Izontal liar 7 ind into contact ivith the one immediatelv beloiv. 15 Tlius it ivill be se(,n that if the solenoid is eiiergized 'mon-ieiitaril.@ at the instant e,,icli ll(,Yht chlnge is required, the result iiill be ,t I)rogi-c@ssii-e advaiieement of the contact iiieii-il)ei- 20 in a clown-%varcl direction, con2(-) tactiiig,, -%i-ith siiceessive coiidiietoi, I)ai-s T. The enei,(,iziii(y of the sol.enoid S is controlled bv mear)s of a si-viteli ilicorl)orated in tlic- I)rintiii- al)l),ii-attis ,iiidl'ormiii(v oiie el(,i,.ient bf a noriiialiv oi,,eii c,,I(,ctr;c Cileiiit iucliidiiig the soleiioicl S, this cireiiit -bein(r' (@l(,ai@l.v showii in FAi(,Y. 't' as coiis;stiii- of t-\v@ (,oncliietors 35. coi- iviji the 1)6sitin-o tiil(-! iiegatin-e si(le,, o'l II-.e iiiain (@:i,eiilt I wi.'Ii tllc? coi-i-esi)on(Iiii(y t,,,l,ill@nal, (f tli,- solenoid. Iii this cii-eiiit is - tli(- switeli .jti@,t n-ientione(l, the saiilc, l@eiii@4 lo,,,ited iniiiiecl:latelv L(Ija(-(,iit the i@c,,rti(,al 1),itli of tli(,, necrative filtii -i\ tind aboi7e ilic@, giii(le meiiiI)ei,s 2, 2 of the I)riilting alii)dratt,,s. The sivitch 36 conll)rises a I)ell crank lei-er ilT provided at the etid of one leveiai-m -%iitli a (-rroove,d adapted to en-a.Lrc,, the ,i [jacent iiiar,,iii of tlio neg-,itive fillii @'\. @t the en(I of the other lever arni is i)rovi(lecl ,, 40 contact point 374 iormally- sl)acecl aivav f i-oiii a co@ictin(y cont@ct i)o;nt 39',' formiii,), 1)art of :i fixe(I tei,m;pal ilate 39. said plate toaetlier in-itli a 1)late 40 on Nvhich the bell cranlc lover '@7 is iiiotiiited beiiig con'uected in seri(,-, witli c-iie, of the coiicltictors 85 of the solenoid @irciiit. Connected ii,ith the bell crank lever is ii sn-iall @coil spriiitx,@41 (Fi@r. 7) which acts to vieldiii--Iy hold the roller 38 in contact %vi.th the ed(.Ye of the film N. So long as the edge of the film i's Y)erfeetly straight the bell ei-ank lever '37 i,(,mains in a position sticii that the conta(,t points are si)aced PI)artan(I tl).e eirenit remaiiis.ol)en. No",, if a noteli, ,;iieh as n is ciit. iii any siiitable manner in the edge of the filin N, as sliown in Fig. 11 it is apparent that wlien the roller engages the depression formed by said notch, the bell crank lever 37, iinder the tension exel@ted b:v the spi-in-- 41, will be moved so that, the con6( tact i)oints 17", 39a en@iage eacli other, tlltis closinu@ the solen6id cii-cuit for an instant, thereby ener(.rizing the solenoid, releasing the pawl aiid perinittinz the contact nieml)ei20 to drop do'wnwardly into contact ivitli 65 the -next condiietor bar 7 of the lioht in-t6ri-sity controlling @ipparatus. The notches 9,t are cut in the negative film at the point ivllere tlle chan,.Yes of scene occur, the notchiiig beiiig done 'prior to the printin-- operation and in co.niunctioii -with the prepara- 'I tion of the tabulatiii- stril) T. Thus it ivill I)e seeii tliai, in the ol)eratioii -of printii-ig fi-om a iiegative film the complete film -is previously charted on the tabulating stril) 1)@7 entering ihereoii the decyree of light in7,@, tensity required for eich scene as ivell as the niimber of feet of filril to be printed at each (le-ree of li_-Iit ii-itelis;t At tlle sin)e time tlle iiotelics i@, are cut in the film, as before @Les i-ibed, so that as tlic, ne@@at've filrii 1)asses c tlirough the I)rintin(r i'@iacliine aiicl ii-i contact -%N-itli the roller 38 of the solenoid s%Yiteli, the li-lit intensitv is aiitom@iticallv clianged .is eacli stiecessii-e iioteli saicl i@oller 38. s -Vs has been US117 poiiite(I olit, it is pre7io ' iiecessai,y ill printin@,, t positi@-e filni to ciit the sanie iiito len(,tlis oi': al )l)roxirii,,iteli, -et for coni-en;ence 'n detwo litindi,e(I fe l i-elol)ment. As a means for i-narlciiii)- the 1)0 positive filiii it the points N%,Iieve it is'-to 1)(, se'vere(.1 t some,,,vliat similar dei-ice is lis;(,(t foi- the piii,l)ose. This dei-ice is clearlv slioii-n in Fi(r,-@. 1 and 5, and clia(rramm. t' cally in Fi g. 'i. 'inloiinted iipon the plate 1 @15 of the printiiial-)piratiis ,iii(I I)elow the ,iiide nieinbct,s 2, 2 tliereof, is iii(tlier ,,-ol(,nold 42 consistin,--- of @ a coil 421, aii(I iii,iyiltui@e 42b, .i(]. soleiioid I)ein,(, so m(,tinte(I that the ari-n,,itiire is inove(I lioriyoiitzilly ,in(I I()') at i-i-ht ,ingles to the plane of the,' filiii. Connected -%i-itli the arniatiii-e is a ei-aiii@ -t,2 iioiinte(l,at the tii(I of a @raiilc sli:ift 44 joiii,iialled iii the bcai-iii(r 45 seetti,ecl to tlic, Tace of, the I)Iiite 1 in-iiiiedii.teli7 above the solenoid 42. The cilaiilc sbaft extencls iiiivarcily toward and parallel to tlie. film ln(I cai@ries at its iiiner cnd ,In eceenti,ic c!llil niember 46 wliich enga.- a 47 locatied in the path of the ri(ylit-liaiid e(Ige ]lo (l,ig. 5) of the I)ositive film P. The plilliger 47 is in the nature of a punch wliich coates -with a fixed puiieli I)I@tte 48 pi,ooper iecting laterally bet-ween the ecl.-cs of the negative and I-)ositive filnis. ks a I)refer.able constriietion, the pltin(yer 47 is siiri-ound@ed by @t c,,tsin(r 49 aii(I iv;tllill tll(-@ is -(i coil sl)riii,r @-)O ii-Iiieli 47a of the I)Itin,("'er tlierel)@, actiiit-, to N'l,@lil;llay force the sa.me iii (@ontzt(-t w'tli tli(@ 120 cam 46. By iiieaiis of tli;s the I)Iun(yei- 47 is capal)l(@ of I)eili@x forAvard-ly I)y the rotition of 0,1111 46 when the armattire of the ,,,o](@iioid is actuate(I bv tlle energizii1cr (f tlle Coil 125 tli6reof, tlie, forwar(I mon@eiiient of the plunger acting to I)Ilncli a seiiii-eirelilar sliape iioteli P in the edge of the positive film (Fig. 6) wliieli serves to indicate the point at @vliieli the positive film is to be 13(
[5]1,474,409 cut. As a means fbr energizing the solenoid at the proper instant, a separate circuit is. utilized, consisting of conductors 51, 51 (Fig. 7) connecting the positive and n ative sides of the main eircuitM with eg the C()rresponding terminals- of the solenoid 42. In series with one of the conductors @@')l Is a E@witeli 52, shown in Fig. 1 as locate(I vertically below the switch 36 forming ii lu part of t-he light control.linga.pparatus and immediately below the guide members 2 and oa the opposite side of the pith of the films from the plunger. 47. This switch 52 comprises a lever 53,, ftilerumed at 54 intermedi15 ate 't ends, the lo er ena being conI c ]Ywith a T-s w te haped rod 55 mounted to sli(le endwise and at right angles to the path of the films. At the ends of the cross arm of the rod 55 are mounted grooved rol-' lers 56, 56 adapted to engago, the edge of the negative film N and spac@d apart a distahce slightlv greatei than the length of the no,tches n ufilized for operating.the switch associated with the light changing apparatus. At the u per end of the switch leier 53 is provided p &,contact point 53a adapted to enga,-e 9, fixed contact point'571, mounted upon a plate 57, said points being normaII3, out of contact with each other. A small co'll ring 58 is connected with the lever 53 in SP such a way as to force tl@e rollers 56, 56 into contact with the edge of the ne-ative film N. To operate.the switch to close the circuit and to theivby operate-the plunger 47 to punch t@e nGt4ches P in the positive film, a n(>tch N' (Fig. 6) is cut in the margin-of the film'@t points spaced apart a pred@termined'.distaiiee, as :tor instance two hundred feet. The notches 9?,' are cut in the 40 Same edge of the film N as the notelies gi and in the same manner the distinction I)eing only in the length,tlienotchesq?,' being substan,tially twice the length of the iiotches n. The purpose of forming the notches 45 n' of greater length thafi the notches @i, is to rovide an arrangement such that both switetes.will n6t be, operated by either f-orm of notch. In other words, the shorter nbtches n as well as the longer notches 9'6' 50 will operate the upper switch 36 whereas only the longer notches n' will operate the lower switch- 52, this being dite to the fact tha@l- the latter includes the two rollers 56; 66 which will n6t permit the switch to 65 f=ction unless both of said rollers engage. a notch long enough to receive the 'same simultaneously. For this. reason the shorter notches n wili pass the roberr, 56, 66 without operatin the punch operating,eircuii 60 switch. -Whi e it is true that the light controlling switch 36 will be clo"d when the roller 38 thereoi engages the 1[7er notches t n' it is quite prope,r that h be so for @h'e reason that it is possible, as well as con65 venient, to etit the tlim at the point where there is a change of scene so that-when the' film is to be severed a, point is selected at which a scene change occurs, in @which case a long notch n' 'is cut in the 'film wliich operates both switches, thiis effecting a change 70 in liglit. intensity as well as marking the positiv e filn-i for severin(r. Inasmiieh as light change I s are consid;rably more frequent than the intervals at which the film is to be cut, this,procediire is not ofjection- 75 able. A light controlling mechiiiisni sucli as lierein described is entirelv atitomatic in its action and, operating . in conjiinction with a previotis . ly prepared tabulating strip, 80 provid es a dependable means for ch-,inging the light intensit-%@. The varioiis setting.@ to obtain the des@ired degrees of light in'- tensity -may be readilv verifie(I b@ c6mparing the nu orical ir@dications on the con- 85 m tact strips _ivith those indicated on the tabillati@g strip by merely glancing down the paralle l column of figitres. Furtliern-iore@ slibseq uent changes in ibe degrees of light intensity can be readi]37 made bv altering'90 the figuies on the tabtilating strip'and shifting -tlie coi-respondi@g indicator strip aecordi gly. A further ad ant-age . re-,ides n in the fact that the de iev v e is exceedingly flexibl e in that anv niimber of conductor 95 bars i' may be tised,'the only limit-,ition be' Ing the height of the panel: on whiell they are mouiit ed. In this wai, filnis of almost -,tihv length may be printe(l' in a single ope-i-ation withou t a resettino, of the device or a re- 100 place ment of the - t'abulat.ing strips T. Alt hougli I h-,ive shown -a pi-efel-able constructi on for 'an apparoLtiis'emb6dying the feattir es of the invention, it is to be iinderstood that vai-ioiis modificdtions may be 105 emplo y(-d witlioiit departinr froni the spirit of the invention. For instance, a baiik of lights may be used instead of a single lamp circuit and a rheostat. For this reason, there! ore, I do iiot wish 'to be lirnited ex- 110 cept in so far as the inx,ention is +pecifically set forth in,the appended claims. - I
