Патент USA US2130793код для вставки
Sept. 20, 1938. L. T. ELIEL 2,130,793 MULTIPLE TRANSFORMING PRINTER Filed April 27. 1936 l ' l0 Sheets-Sheet l /43 .6’ A TToR/VEK Sept. 20, 1938. L.. T. ELIEL 2,130,793 MULTIPLE TRANSFORMING PRINTER Filed April 27, 1956 l0 Sheets-Shea?l 2 Sept. 20, 1938. Amr2,130,793 L. T. ELM-:1_ MULTIPLE TRANSFORMING PRINTER Filed April 27, 1936 lO Sheets-Sheet 3 @Y ma( Sept. 20, 1938. L, TA ELM-¿1_ ` 2,130,793 MULTIPLE TRANSFORMING PRINTER Filed April 27, 1956 l0 Sheets-Shes?l 4 A TTOR/VEK Sept. 20, 1938. 1_. T. ELIEL 2,130,793 MULTIPLE TRANSFORMING PRINTER Filed April 27. 1956 l0 Sheets-Sheet 5 /0 A TroR/VEK Sept. 20, 1938. L, T_ ELlEL 2,130,793 MULTIPLE TRANSFORMING PRINTER Filed April 27. 1936 l0 Sheets-Sheet 6 /04 /08 y m5 A63 /15 7 /J/ A66 (iw /22 /// Sept. 20, 1938. L. T. ELIEL 2,130,793 MULTIPLE TRANSFORMING PRINTER Filed April 27. 1956 l0 Sheets-Sheet '7 «d TroR/VEY. Sept. 20, 1938. L, T. ELM-:L 2,130,793 MULTIPLE TRANSFORMING PRINTER Filed April 27. 1936 10 Sheets-Sheet 8 @Y ou( A TTOR/VEY. Sept. 20, 1938. L, TA E|_|EL_ 2,130,793 MULTIPLE TRANSFORMING PRINTER Filed April 27, 19156 l0 Sheets-Sheet 9 _ A rrOR/VEY. Sept. 20, 1938. L_ T. ELlEl. 2,130,793 MULTIPLE TRANSFORMING PRINTER Filed April 27, 195e ' 1o sheets-sheet 1o F1312 mi A rroR/Vfx '2,130,793 Patented Sept1 20, 1938 UNITED STATES PATENT OFFICE 2,130,79'3 MULTIPLE TRANSFORMING PRINTER Leon T. Euer, rumena, cam. Application April 27, 1936, Serial No. 76,573 7 Claims. This invention relates to transforming printers whereby photographs having images which are distorted, by reason of the fact that they have been taken at oblique angles, are corrected in 5 the printing thereof so as to eliminate the dis tortion of the image and thereby produce a print wherein the various parts of the image are spaced apart/in accordance with the true scale relationr ing the foregoing members in such a manner that they may be quickly aligned and so that « the positions thereof may be changed at any time to change the focal distances and also the angu lar relationship of the photograph support and 5 the print support under various selected condi tions of operation, such as a change in the focal distance of the lens or the use of the transform in which the original parts represented by the ing printer with photographs made by a different image existed at the time the photograph was taken. The invention relates in particular to a transforming printer whereby a plurality of com multiple-lens camera. plementary oblique photographs/„which have been simultaneously taken may be transformed and. printed on a single sensitized member, such as a photographic negative. Herein I use the term “complementary photo graphs” to indicate two or more photographs si multaneously taken of adjacent sections of an 20 area, and likewise employ the term “complemen tary images” to mean the images of photographs simultaneously taken of adjacent sections of an area and which, when properly combined in side by-side relation, will form a complete picture or of the total area covered by the comple L25 image mentary images. 'I‘he invention is of especial utility in the art oi' map making, wherein the terrain is photographed by use of a multiple-lens camera in which the lenses are so placed that 30 they will photograph on separate negatives com plementary images of complementary sections of’ an area of the terrain. It has been the custom ary practice to print each image of a set of com plementary images separately by use of a trans 35 forming printer, and then join the separate prints together in side-by-gde relation so as to produce a picture of the entire ar‘ea covered by the set of .complementary photographs. It is an object of the present invention to pro 40 vvide a transforming printer whereby the com plementary images of a set of complementary photographs may be printed on a single sensi tized member, such as a photographic negative, thereby Aforming the complete or composite pho 45 tograph without the necessity of separate prints as has been heretofore necessary. It is an object of the invention to provide a transforming printer having a rotary head or photograph support with means thereon to carry 50 a plurality 'of photographs, a rotary> print ísup port for carrying a sensitized photographic sheet or plate on which the composite print is to be made, and a lens support carrying a lens in oper ative position between- kthe photograph support 55 and the print support, with means for support ` 10 It is a further object of the invention to pro vide a transforming printer of the above char acter having a removable head or photograph support in duplicate so that one set of comple mentary images can be printed from photographs held in one of the heads while another set of photographs is being mounted inthe other head in preparation for the transforming and printing thereof. It is a further object of the invention to pro 20 vide a simple means for holding the photograph or analogous means carrying the distorted com plementary imagesA in proper position on the ro tary head, together with an improved means for bringing the photographs into practical positions of registration. Multiple-lens cameras of the character employed in aerial photography gen erally provide registration marks in their margins by means of which the relationship of each indi vidual picture with its lens is re’corded. My invention provides an effective means, utilizing these registration marks, for locating the photo graphs on the rotary head of the transforming printer while the rotary head is removed from the printer, and so that the images of the photo graphs will al1 be in proper position for projec tion in complementary relation onto a sensitized member carried by the print support. It is a further object of the invention to pro vide a transforming printer of the above char acter having a. mask disposed adjacent the front surface of the print support, this mask exposing on the face of the sensitized member carried by the print support an area which is to receive the transformed image projected from a distorted 45 image carried by the rotary head. The invention also has as an object thereof to provide a means for adjusting this mask to a high degree of pre cision. Illumination control in transforming pictures 50 taken by a multiple-lens camera is very trouble some owing to the fact that the pictures arey taken obliquely, one toward the sun', one away from the sun, and-two at right angles to it, or some similar arrangement. Asthe result, at least 2 2,130,793 three out of four of the pictures taken by a four lens camera, for example, will be produced under different conditions of lighting, with the result that under ordinary practices of transforming the prints separately and then assembling them to produce the complete picture, great difliculty is experienced in matching up the complemen tary prints so that the same density within rea sonable limits will be obtained in all parts of the 10i complete picture. It is an object of my invention to provide a lighting system for the transform-` ing printer adapted to be adjusted in accordance with the requirement of a complete assembly of complementary photographs carried on the ro 15 tary head'so that in the printing of the images from these photographs consecutively onto a sen sitized member carried by the rotary print sup port, a practical matching of densities will be accomplished in each of the complementary sec 20 tions of the completed print. A further object of the invention is to provide a photoelectric cell for making a ñnal check of the printing lights used in the printing of the re spective images from the photographs before 25 these images are printed onto the sensitized mem ber, together with an arrangement whereby the adjoining edges are matched with a high de gree of precision by the checking of the printing light through the overlapping edges of the re 30 spective complementary images. 'I'he `result of the foregoing is that the composite prints ob tained by the use of my transforming printer are far superior, from the standpoint of color match ing and detail matching. to results obtainable 35 when all of the transformations of a set of dis torted images are individually transformed and the prints therefromv subsequently trimmed and assembled. greater illumination than the sections which are either not enlarged or are reduced in the print ing thereof. It is an object of the invention to 45 provide means for light distribution and control which are adjustable so as to compensate for the variations hereinabove set forth. " Further objects and advantages of the in vention will be made evident throughout the fol 50 lowing part of the specification. Referring to the drawings, which are for illus trative purposes only, y Fig. 1 is a diagrammatic view showing the re lationship of a group of complementary photo-55 graphs taken by a multiple-lens camera with a photographed area and with the composite pic ture of such area. Fig. 2 is a -plan view of a preferred form of my transformer. ` , Fig. 3 is a fragmentary section taken as indi cated by the line 3-3 of Fig. 2, but with the head supporting easel turned into a plane perpendicu lsr tto the. longitudinal axis of the supporting bed p a e. 65 dicated by the line >ill--lilboi’ Fig. 7. Fig. 11 is a partly sectioned elevational view of the printing head easel. Fig. 12 is a face view taken substantially as in dicated by the line l2-I2 of Fig. 11. Fig. 13 is an enlarged fragmentary sectional 10 view taken as indicated by the line,«i3--I3 o Fig. 12. . ' Fig. 14 is an enlarged fragmentary section taken on the plane II-il of Fig. l2. „ » Fig. 15 is a fragmentary, partly sectioned view 15 showing the means which I employ for checking the projected light through use of a photoelec tric cell. Fig. 16 is a sectional View taken as indicated by the line Iii-I6 of Fig. 15. 20 Fig. 17 is an electrical diagram showing the means for controlling the printing light. In Fig. 1, which is purely schematic, I show an area 2i, consisting of complementary areas A, B, C, and D, which is to be photographed. This 25 area 2| may be a portion of a terrain which, to the eyes of a person in a position of elevation thereabove, presents a picture. This area 2| may be of such size that it cannot be suitably photographed through a single lens; therefore, to produce a picture thereof, a multiple-lens camera is employed. Although the multiple-lens camera used may have various 'numbers of lenses, I shall in this description of the adaptability of the invention 35 limit the description to the use of a four-lens camera 22 having four negative plates or films A', B', C', and D’ adapted to respectively receive v The problem of proper illumination is further 40 complicated by the fact that those sections of the transformations whichk are enlarged require 60 the telescope holder thereof removed so as to show the underlying parts and the manner in which engagement with the plate holder is made. Fig. 10 is a fragmentary section taken as in Fig. 4 is a face view of the rotary head, viewed as indicated by the line 4-4 of Fig. 3. Fig. 5 is a fragmentary elevational view taken as indicated by the line 5_5 of Fig. 4. Fig. 6 is an enlarged sectional view taken on 70 a plane indicated by the line 5-5 of Fig. 4. Fig. '7 is an enlarged plan View of the adjust ing jig in place on the rotary head. Fig. 8 is a sectional View taken substantially as indicated by the line 8_8 of Fig. '.7. Fig. 9 is a plan view of the adjusting jig with the images of the areas A, B, C, and D. Owing to the fact that the optical axes on which the negatives A', B', C', and D’ are photographed are oblique, the areas photographed upon the negatives A', B', C', and D' will be of the char acter of the respective areas a', IJ', c', and d' indi cated by dotted lines in Fig. 1, and which radi- „ ate from a common center P. Further, in view of the oblique setting of the negatives A', B', C', and D' relative to the surface of the terrain, the complementary areas A, B, C, and D will be each represented on the negatives A', B', C', and D’ by distorted images indicated by dotted lines 23. It is Well known that in order to produce a recti ñed picture of the area 2|, or pictures of the areas A, B, C, -and D, it is necessary to use a trans forming printer, wherein the negative and the 55 sensitized member on which `the print is to be made are disposed at predetermined angles so` that the images projected onto the plane in which the sensitized member is held will be of the shape of the area a', b', c', or d' originally photo 60 graphed. l In Fig. ‘2 I’show a photograph A' which may be the negative transparency indicated in Fig. 1 or may be a positive transparency directly print' ed therefrom. This member A' is mounted on 65 a rotary head 23 in such position that light may be projected therethrough and along a path indi-, cated by dotted lines 24 to a lens 25 by which the image is projected forwardly, :is indicated by dotted lines 2E, to a plate or sheet of sensitized material 2'? mounted on a rotary print holder 2l, the members iii?, îiïi, and í'li g disposed in the proper angular ticnship to; transforming the image of the aber fi’ in the printing thereof on the sensitized member 21, If the member A’ 2,130,798 shown in Fig. 2 carries a negative image, the transformed print obtained on the sensitized member 21 will be a positive print. . It is custom ary in practice, however, to prepare positive photographs by direct contact from the negative taken from the aerial camera, so that the print obtained on the sensitized member 2,1 will be a negative print from which a positive direct print is subsequently made. The transformer shown 10 in Fig. 2, and the succeeding ñgures, includes a cast bed plate 29 having a table 3| formed at the rearward end thereof in permanently fixed relation, and having mounted thereon adjustable tables 32 and 33 respectively supporting the ro 15 tary head 23 and an easel 34 carrying the lens 25. As best shown in Figs. 2 and 3, the adjustable tables 32 and 33 each have a horizontal wall 35 and oppositely disposed, downwardly projecting Then, by rightward pressure against the project" ing end 86 of the bar 32, such bar is moved right» wardly against the force of the spring 53 so that the rightward end of the ‘par 62 will move :into lthe position indicated by dotted lines 11. The cap 1i .is then slipped over the rightward end 61 of the bar 62 and past the ends of the pin t6.,r whereupon the 'cap 1i is rotated so as ‘to bring the 'depressions 69 into alignment with the ends of "the pin 68, and, the pressure against the leftward 10 end 66 of the bar 62 is released so that the spring 59 will .force the bar 62 leftwardly and will trans mit a leftward force throng the pin 68 and the cap 1I tothe hub 14 of the rotary head 23 to hold such rotary head against the shoulder 15. The rotary head 23 has a number of openings` 16 therein corresponding 'to the number of photo graphic plates to be transformed onto a single side walls`36 at the edges of the horizontal wall print. in the present instance, where the in Each table 32 or 33 is adjustable in all di# vention is being used with a four-coupled aerial rections on the bed plate 29. For example, there j camera, there are four of such openings 18 evenly spaced around the center of rotation of the are vertical screws 31 threaded through the hori zontal wall 35 and -having plates 36 at the lower rotary head 23 defined by the stub shaft 55. In ends thereof for engaging the y,upper wall 39 of Fig. è E have shown the rotary head with one of 4the openings 13 exposed and with photograph 25 25 the bed plate 29, as shown in Fig. 3, and in the supporting means 19 secured in operative rela side walls 36~ there are side screws 4i for engag ing `the side faces 42 of the bed plate 29. At the tion to other of the openings 18. As shown forward and rearward ends of each table 32 and in Figs. 3 to 6 inclusive, each of the photograph. 33 are hold-down brackets 43 which are bolted supports has a base frame 3i consisting of four‘ to the upper wall 39 of the bed plate 29 by use side members i12 from which lips or shelves 33 36 of bolts 44. Each of the brackets 43 has a ver» project inwardly so that a photographic plate tical wall 45 and an inwardly extending wall 46 34, or other image carrying transparency, may projecting over a portion of the associated table he supported thereon, as shown in Fig. 6. To hold 32 or 33. In each of the vertical walls 45 there the photographic plates 84 in place in the base 35 are two adjusting screws 41 adapted to engage frame 8 i, cover frames 85 are provided which are an edge of the table 32 or 33, and through each essentially the same sizeas the base frame 9i. wall 46 there is a hold-down screw 48 adapted to "jachicover frame 85 carries an optical flat glass 3S having downwardly converging edge faces 8l engage the table with which each bracket is asso» ciated. Mounted on the upper face of the table engaging the frames S5 and 3l in the manner shown in Fig. 6. 'ïhe lower face B8 of each glass 40 32, as shown in Fig. 3, there is a head supporting may "near directly against the photographic easel 43 having a base portion 5l which may be plate at, or a piece of transparent material 83, such as Celluloid, may be placed between the prepared vertical extend studs axis, so that by 53 byfwhich using the easel slotsthe 52 may easel through be 49 swung iswhich secured on 20 ,35. ',30 face S8 and the upper face of the member 84 to 45 to thetable 32. 'The upper end of the easel 43 has a horizontal bore 54 in which a forwardly projecting stub shaft 55 is secured, which may be by use of a pin 56. ,The stub shaft 55 has an axial bore 51 with 50. a counterbore 56 at the rearward or ieftward end thereof position for to engage receiving theahead compression 6I of a bar spring 62 which 59 prevent the face t3 from becoming scratched. The glasses are held in the cover frames 85 "ny means of small plates or clips 9i which are secured by means of screws Q2 so as to project over the edges oi the plates 3G. The photograph supporting means 19 are ad justabiy secured in place by means of lugs 93, two Eachofiug which has project an opening _fro-in each 3G» »therein base frame through extends through the bore `51 and the counterbore of considerabiy smaller diameter, 58 of the stub shaft 55. A plate 63 is secured by" _ “which a stud may project from 'the face of the rotary head 23 55 and screws this 64 to plate the leftward 63 has an end`opening of the stub 65 shaft through in the manner shown in Fig. 5. Each stud SLT which an end 66 of the bar 62 projects. On the forward or rightward end of the bar 62 there is a transverse pin 68 adapted tov engage diametraliy co opposed depressions 69 in the front i’ace of a cap 1| having an opening 12 through which the end 61 of the bar"62 may pass, and likewise having transverse notches 13 radiating from the opening 12 and being of such size that the ends of the pin 65 68 may pas/s therethrough when the cap 1i is rotated through an angle vof 90° from the position lnas a nut S5 threaded thereon, adapted to force washer a lug downwardly against 'the upper face . so as to clamp the lug 93 tightly against the face of the rotary head 23. Prior to the tightening of the nut 96, the photograph holding means ‘i9 may be .adjusted on the face of the rotary' head 2E within reasonable limits. .As shown at the top and right-hand side of Fig. fi, each base frame Si has lugs 98 projecting 65 outwardly therefrom to which leaf springs 99 in which it is shownso that the notches 13 are in ' are pivotally secured by such means as screws 70 alignment with the ends ofthe pin 66. 'I'he ro tary head 23, which is essentially a circular disc, llii, so that they may be swung outwardly as shown. Each cover frame 35, as shown at the has a hub 14 with a lbore 15 adapted to closely fit the shaft 55. It is the function of the cap 1i to hold the hub 14 against the shoulder 16 at the upper end of ythe easel 43. With the cap 1i re~ moved from ther position in which it is shown, the left-hand side of Fig. 4 and also in Figs. 5 and 6, has lugs H22 projecting outwardly near the cor ners thereof and in such positions that when the 75 rotary head 23 is placed upon the stub shaft 55; leaf springs 99 are swung inwardly, the free ends thereof may be rested upon the lugs S32 to apply downwardly pressure to hold the -cover frames 85 2,180,793 member A', and the telescopes |35 of the jig may be adjusted so as tobring the cross lines |53 thereof, which are projected kin dotted lines in 9, into- registration with the registration marks |49; After being so adjusted, the tele scopes |35 are locked in position, and thereafter the adjusting of the supporting means 19 to bring the ,photographic plates into proper position on the rotary head 23 is accomplished by use of the 10 .jig` |03 which is consecutively placed over each of the photograph holders, so that while the jig A|03 isso placed the adjusting screws |22 and |25 5 it is shown in> full lines in Fig. 11 against the face of the sensitized member 21, into a retracted'po sition indicated by dotted lines |16. The mask |14 has a plate portion |11 with a notch |18 at the rightward side thereof, as viewed in Fig. 12. To the edge walls |19 of the plate |11 forming the notch |18, adjustable edge strips |8| are se cured by means of screws |82, as shown in Fig. 14. These edge strips |8| have accurately ground knife edges |83 which, by adjustment of the edge 10 thereby are brought into register with the cross `lines |53 of the telescopes of the jig |03. When the rotary head 23 is mounted in opera >strips |8|, may be caused to l'ie exactly on lines diverging at an angle of 90°. With the knife edges |83 disposed at an angle of exactly 90°, the »mask |14 may be adjusted so that the point of meeting of the inner ends of the knife edges |83 15 will coincide with the axis of rotation p of the rotary member 28, which axis p will pass `through the exact center of the print formed on the sen tive position on the easel 49, as shown in Figs. 2 20 and 3, the registration or aligning openings ||3 member |83 is radially disposed at point p, so 20 may be operated to move the supporting means 19 in such direction or directions that the regis .15 tration points on the photographic member held of the ‘rotary head 23 are employed to position the rotary head 23 so that the photographic plates carrying the distorted images may be successively brought into exact positions of cooperation with 25 the lens 25. For this purpose a bracket |54, Figf’3, is mounted on the easel 49, this bracket having a horizontal opening |55 through which a pin |56 extends,'such pin |56 being movable back and forth into and out of engagement with 80 the successive registration openings | I3 when the rotary head 23 is rotated from one position to sitized member 21. A small saw cut |80 on the' that a center cross will be formed on the trans formation 21, and notches |90 on the member |83 provide registration marks on the transformation by means of which principal point p may also be located. 25 The mask |14 may be adjustedl in all directionsA by use of the following means. A bracket |84 is secured to the lower part of the easel |59 in forwardly extending relation, this bracket having a threaded bore |85, Fig'. l2, centralized on a hori 30 zontal axis which is likewise parallel to the plane defined by the front face of the rotary member another. As shown in Figs. 2, 1l, and 12, the rotary print 28.. Threaded into the bore |85 are laterally ad holder 28 comprises a metal disc having a rear- ' justable sleeves |86 which serve as bearings for 35 wardly extending hub |51 which rotates in the bore |58 of an easel or standard |59 having a base plate |6| so that it may be secured to the table 3| ofthe base plate 29 by means of studs |62 and nuts |63. The sensitized sheet 21 which is to form the transformed print may, in accordance with the practice of the invention, be a sheet of .sensitized photographic paper or may be a trans parency with a sensitized photographic emulsion thereon. In the present instance the member 21 is square and is to receive four complementary images thereon, such images being disposed around the center of the member 21 as defined by the axis of rotation of the print supporting head 28. To hold the member 21 against the front face 50 of the member 28, a grille of crossing channels |64 is provided,'such channels |64 being con nected to a central opening |65, Fig. 11, which projects within the hub |51 of the member 21 and communicates through radial openings |66 55 with a channel |61 formed in the bore |58, such channel |61 being connected to an exhaust pump through a tube |68. The tube |68 may be pro vided with a suitable two-way valve |69 for con trol of and release of rthe vacuum to be applied to 60 the4 channels |64 ofthe member 28. , . a shaft |81 having outwardly extending squared 35 ends |88 which support' legs |89 of a connector plate |9| which is adjustably secured to the low er portion of the‘plate |11 by means of screws |92 which pass through enlarged openings |93 in the member |9|. Adjusting screws |94 are mounted 40 on opposite sides of a notch |95 in the member |9|, through which notch |95 a lug |96 projects from the plate |11. The legs |89 of the plate |9| have bosses |91 at the lower ends thereof with squared openings |98 therethrough, through 45 which the squared ends |88 of thegshaft |81 ex tend. Perpendicular adjustment screws |99 are threaded through the walls of the` bosses |91 into engagement with plates 20| which fit against 50 the upper and lower faces of the squared shaft ends |88, and end plates 202 having rectangular openings 203 therein are fitted on the outer ends of the squared shaft ends |88, these end plates 202 having horizontal adjusting screws 204 55 «adapted to bear against the opposing horizontal faces of the squared shaft ends |88 in the man ner best shown in Fig. 11. The end plates 202 have vertical slots 205 in the upper and lower , portions thereof, which slots 2705 receive. horizon _tal pins 206 which are projected outwardly from thegeasel; |59. byqmeans of aabracket.,> |12, a; divid-y thebosses |91. Washers 201,and nuts 208 are 60 Bymeans of ,afregistrationpin |1|, carried on inge‘of'tlie rotary,-print.lfiolder»Í 28 into, a desired yapplied to theouter ends of the ysquared, shaft number l.of .divisions or seetionsvis" accomplished. , portions |88„and spacing plates or washers 209' 65 In the present,instancethenmember 28‘and'vthe fare disposed between the inner faces of the bosses 65 ‘ sensitized;membertgfl’gsuppolgted thereby `,are to _` |91 and the endsof the sleeves |86,"as shown in Fig. 12. The foregoing arrangement of parts be ,divided int_c,>;.<i§ou,r` sections, which is accom plished by@previdíriathefmemberè 28 with four» may b'e`„employed~ to adjust the‘mask `|14 in any n ' eVenIyspaçed- registrationopenings‘. |13 `in posi-,y f desired direction so-as to bring the'point of meet--k 70 tionsto ,be consecutively engagedxby.r the leftward ing'of the knife edges> |834 into registration with 70 endet the l'pizimlm'llg asbestshown in Figli. A ¿ the axis p. The imageprojected'by the lens v25 from the mask »|.141is tprovided lto ycover. three lquarters, vof the ksensitized memberzkandto, leave a quarter I photographic member,„such as A’ aligned there section,„IM-1,5-` thereofy exposed.. `This mask „is with,y will have a shape somewhat of the charac~ v adaptedto berotated-fromthe position `in which . terindicated by ldotted lines2|| of Fig. 12. The e 2,180,793 two inner edge portions of the image 211 will 'be cut off by the mask 114, and the Vouter edge portions 212 of the image 211 will fall beyond the edges 213 of the sensitized member 21. The knife edges 183 accurately define the lines of division or engagement of the complementary images received by the sensitized member 21, these images meeting accurately on the lines of division Without overlapping or without unex 10 posed strips therebetween. As indica-ted by dotted lines 214 in Fig. 2, a light box or housing 214 is mounted behind the rotary head 23 in alignment with the axis of the l'ens 25 so that light will be produced behind the photographic plate A', or` other photographic plate aligned with the lens 25. The lamp hous ing 214 carries a group of electric lamps adapted to be individually adjusted. In the present practice of the invention I employ six lamps L1 20 to Le inclusive as shown in Fig. 1'7 which may be distributed within the light housing 214 in a manner which may be readily determined by experimentation. Each lamp has four adjust able, separately and selectively used controls 25 which may be adjusted with respect to the four photographic plates A', B', C', and D’ before the sensitized member 21 is placed on the head 28. To accomplish this control, I provide a control panel 215 having four sections Si, Sz. S3, and S4 30 across ‘which conductors 216 extend from the lamps L1 to Ls inclusive, the other sides of these lamps being connected through conductors 211 with a common conductor 218 leading to a source of electric current such as a generator 219. Each 35 section S1 to S4 inclusive has six rheostats R1 to Re inclusive, all being connected to a common conductor 220 which leads to the generator 219, and each rheostat R1 to Rs being connectable through a switch 22| with a conductor 216 lead 40 ing to a corresponding lamp of the group of lamps L1 to Le. There are six of the switches 221 in each section, and all of the switches 22| of each group are adapted to be simultaneously closed and opened so as to close electric circuits 45 including the lamps L1 to La inclusive and the associated group of rheostats R1 to Re inclusive. This is accomplished by the use of i‘our sole noids 222 connected'by conductors 223 with a common conductor 224 leading to the side of the generator 219 to which the conductor 218 50 is attached, and being connectable through manually operable switches 225 with the com mon conductor 220. The selective operation of the switches 225 accomplishes a selective bring 55 ing of the groups of rheostats in the sections S1 to S4 into circuits including the lamps L1 to Le and the generator 219. Four complementary photographic plates are mounted on the rotary head 23, and the indi 60 vidual sections of rheostats are adjusted in ac an especial feature of the invention to provide means for precisely controlling the lighting of the adjacent or matching edges of the comple mentary images projected onto the sensitized member light measuring 21. This device I accomplish 226, Fig. by 15, the which use oper of ates in conjunction with means 221 for projecting desired portions of the images projected by the lens 21 to the light responsive and measuring device 226. It will be understood that the transforming printer is preferably to be used in a dark room and that portions thereof may be housed-in as required to protect the sensitized member 21 from light other than the image projected there on by the lens 25. As indicated by dotted lines in Fig. 2, a wall 228 may be placed across the iront of the easel 34 so that the lens structure 25 may project therethrough. As shown in Fig. 15, the light responsive device 226 >may be mounted on 20 the Wall 228 adjacent the forward end of the lens 25, and the image projecting means 221 may be mounted on the wall 228 by means ol' a bracket 229 so that it may be swung from a retracted position indicated by dotted lines 231 into a position before the lens 25, as indicated in full lines. The member 221 has a front wall 232 carrynrO a lens 233 adapted to be aligned with the objc@ tive lens 25, a diagonal wall 234 carrying a plane 30 reflecting mirror 235 which will project the image from the lens 233 toward a lens system 236 car ried by a side wall 231 of the device 221 in such position that it will direct the image to a photo electric cell 238 forming a part of the light re sponsive means 226. The use of a photoelectric cell for the measurement of light is old. Accord ingly, the light responsive means 226 has been shown diagrammatically. For the present pur poses the light responsive means 226 is shown 40 with an ampere meter 239 adapte-d to be placed at a point convenient to the operator of the transforming printer and to be connected to the remaining electrical parts of the device 226 by means of conductors 241, this meter 239 having 45 an indicator 242 which moves in accordance with the light received .by the photoelectric cell 238. As shown in Fig. 16, the side wall 231 of the device 221 has a mask 243 mounted thereon so as to partly cover the area of the lens system 236. 50 This mask has two slots or openings 244 therein through which the matching edge portions of the images projected from the lens 25 may pass to the lens system 236 under control of shutters 245 and 246 which are interconnected in such a manner 55 that when the shutter 246 closes the lower open ing 244, the shutter 245 will expose the upper opening 244 of the mask 243. The shutter 245 consists of a metal strip having its inner end 241 hinged on a pivot 248'which may be mounted on 60 cordance with the light requirements of each the mask 243. The rightward or outer end of the photographic plate before _the sensitized member `shutter 245 has a slot 249 therein and a projecting 21 is mounted on the rotary support 28. Each handle 251 whereby the shutter may be raised and section of rheostats Si to S4 is adjusted inde lowered. The lower shutter 246 is mounted on a pivot 252 disposed at its inner end and has a pin 85 65 pendently of the remaining sections and en 253 at its outer end which engages the slot 249 tirely in accordance with the strength and dis tribution of light required by the photographic in the shutter 245. .When the shutter 245 is raised, the engagement of the pin 253 with the plate to which the section of rheostats corre sponds in the operation of the transforming slot 249 Will raise the shutter 246 into closed 70 printer. In this manner such variations in position relative to the lower mask opening 244, 70 density existing in and between the photographic and as the shutter 245 is swung downwardly into plates is compensated for, with the result that closed position relative to the upper mask open ing 244, as indicated by dotted lines 254, the shut a practical control of the densities of the com plementary images obtained on the print formed ter 246 will be swung into lowered position, or ".15 from the sensitized member is attained. It is open relation to the lower mask opening 244, as 75 2,130,793 indicated by dotted lines 255. An auxiliary mask 256 is provided which may be swung on a pivot 251 from the open position _in which it is shown in strips and half striœ the total illumination oi’ the strips is identical and the illumination of the half strips is identical, thereby providing for identical illumination along the matching lines. It will be apparent that the lamps L1 to Le in lines 258 wherein it will cover the inner halves of clusive comprise a bank of lamps that, by virtue both upper and lower mask openings 244. As shown in the schematic Fig. 1, the portions of the control system indicated in Fig. 17, is or images a', b', c', and d’ of the terrain which adjustable with respect to the pattern of inten are projected photographically to the respective ,sity in cross-section oi' the light projected from the bank, and that such a bank of lamps may 10 photographic plates A', B', C', and D' have over lapping edge areas 259. 'I'he transformed images be adjusted for a beam pattern so related to the which are projected from the photographic plates pattern of the light-transmitting character of the photographic plate as to produce a desired in the transforming printer and onto the sensi full lines to closed position indicated by dotted tized member 21 are of the same shape as the ‘ distribution of intensity over the image cast on 15 areas a', b', c', and d' of Fig. 1, as indicated by the printingmember. Thus, if it is desired to the image 2H shown in dotted lines in Fig. 12. have an image of substantially uniform intensity, With ’relation to the transformed images, and the bank of lamps will be adjusted to project a likewise with relation to thebriginal images a',v beam having a cross-sectional pattern of light b', c', and d', the mask openings 244 correspond 20 to the overlapping areas 259 at the edges of the images. Accordingly, in preparation for the printing of the complementary images on the sen sitized member 21, each photographic plate, such as the plate A' shown in Fig. 2, is moved into 25 printing position, and by use oi lights obtained from the lamps L1 to La inclusive, the image thereof is projected onto a sheet of paper carried on the face of the rotary member 28. The rheo stats R1 to Re in the control section correspond 30 ing to the photographic plate at this time in alignment with the lens 25 are given an initial adjustment while the intensity and distribution of light on the paper carried by the rotary mem ber 28 is visually checked. The member 221 may 35 be then swung from its retracted position shown intensity substantially complementary to the pat tern of the light-transmitting character of the photographic plate. The required adjustment of the projected light beam is possible because each individual lamp of the bank projects its ‘own beam and the beam from the bank as a whole is a combination of these individual beams. With 25 the light measuring means described, it is con veniently possible to measure the light intensity rof selected portions of the image to determine the particular pattern of light beam projected from the bank of lamps that will be required to 30 give the desired effect at the printing member ci the apparatus. ` After adjustment of each of the sections S1 to Si, inclusive, of the rheostats R, the sensitized member 21 may be placed on the rotary member 28, and the complementary images carried by in dotted lines 22| Íof Fig. 15 into full line posi tion, andthe matching edge areas of the image may be individually checked by use of the photo electric cell 238. With the auxiliary mask 256 in retracted position as shown in full lines in Fig. 16, the upper matching edge area o'f the projected the photographic plates held on the rotary mem ber 23 may be consecutively projected onto con secutive portions of the sensitized member 21 while the mask 114 is in raised position as shown 40 in Figs. 2, 1l, and 12. This consecutive projec image is permitted to pass through the upper mask opening 244, whereupon the reading of the tion of the images so that they will become con secutively printed on the sensitized member 21 meter 239 is noted. The handle 25| of the shut 45 ter 245 is then swung downwardly so that the lower mask opening 244 will be opened and the upper opening 244 closed, whereupon the quantity of light constituting the lower matching edge area of the image may be noted on the meter 50 239. If there is a discrepancy between these readings, or., in other words, a deviation from a isy accomplished by consecutively rotating the head 23 and the print supporting member 28 45 from position to position, and using the differ ent sections oi rheostats S1 to S4 with the re spective photographic plates for which they have been adjusted. Although I have herein shown and described my invention in simple and practical form, it is recognized that certain parts or elements there standard reading, the rheostats at this time con nected with the lamps L1 to La inclusive may be of are representative of other parts, elements, or readjusted to balance the light passed through mechanisms which may be used in substantiallj7 g >the same manner to accomplish substantially the 55 the upper and lower mask openings 2413. Two like readings obtained through the upper same results; therefore, it is to be understood and lower openings 244 and 245 of the mask 243, that the invention is now to be limited to the de tails disclosed herein but is to be accorded the with the auxiliary mask 256 in retracted posi tion, indicate only that the quantities of light full scope of the following claims. 60 passed through the openings 244 are the same, but do not show whether or not the light at the inner end of an opening 244 may be stronger or 4„weaker than the light at the outer end of the opening. To determine whether the light pass ing through the inner and outer halves of the _openings 244 is balanced, the auxiliary shutter 256 is moved into the position in which it is in dicated in dotted lines 258, wherein the inner halves of each oi the openings 244 are covered. 70 Light is then projected through the remaining or outer portions oi.' the openings 244 by use of the shutters 245 and 246 as previously described, and the lights adjusted until the reading is the same on both outer portions. At the conclusion of the balancing of the complementary whole I claim as my invention: i. In a photographic printer for printing con tiguous complementary images on a single light sensitive member from a plurality of complemen tary photographic members to produce a con solidated print, the >combination of: supporting 65 means for said plurality of photographic mem bers; supporting means for said light sensitive member; a light source and an optical systemv by which printing light can be transmitted suc cessively through said photographic members upon corresponding areas of said light sensitive member; means for varying the intensity and cross sectional pattern of said printing light to compensate for varying densities of said photo~graphic members; a light intensity indicating 8 , 2,130,793 device positioned upon said printer, including an element movable into and out of the path of said light, for measuring the intensity of the light transmitted through each individual photo graphic member; and means for restricting the light reaching said device to that transmitted through selected areas of said individual photo graphic member to indicate the variation of the cross sectional pattern of said printing light 10 which will match the contiguous margins of the individual images printed upon said light sensi tive member when projected thereon, so that the photographic members can be successively printed upon said light sensitive member to pro 15 duce a print having substantially uniform density. images printed upon said light sensitive member when projected thereon, so that the photographic members can be successively printed upon said light sensitive member to produce a print hav ing substantially uniform density. 4. In a photographic printer for printing con tiguous complementary images on a single light sensitive member from a plurality' of complemen tary photographic members to produce a con solidated print, the combination of : supporting 10 means for said plurality of photographic mein bers; supporting means for said light sensitive member; and an optical system and a light source including a plurality of lamps by which printing iight can be transmitted successively 15 through said photographic members upon corre 2. In a photographic printer for printing con tiguous complementary images on a single light sensitive member from a plurality or" comple sponding areas of said light sensitive member; means for varying the energization of each of mentary photographic members to produce a consolidated print, the combination of: support tional pattern of said light to compensate for 20 varying densities oi said photographic members; a light intensity indicating device positioned up said lamps to vary the intensity and cross sec ing means for said plurality of photographic members; supporting means for said light sen sitive member; a light source and an optical system by which printing light can be trans on said printer, including an element movable into and out of the path of said light, for meas uring the intensity of the light transmitted 25 mitted successively through said photographic through each individual photographic member; members upon corresponding areas of said iight vsensitive member; an individual control means corresponding to each said photographic member for varying the intensity and cross sectional pattern of said light to compensate for varying densities or" said photographic members; a light intensity indicating device positioned upon said printer,- including an element movable into and out oi the path oi said light, for measuring the intensity oi the light transmitted through each individual photographic member; and means ior restricting the light reaching said device to that transmitted through selected areas of said indi vidual photographic member to indicate the var iation of the cross sectional pattern of said printing light by the corresponding control means which will match the contiguous margins of the individual images printed upon said light sensi tive member when projected thereon, so that the photographic members can be successively printed upon said light sensitive member to pro duce a print having substantially uniform density. 3. In a photographic printer` íor printing con tiguous complementary images on a single light sensitive member from a plurality or" comple mentary photographic members to produce a con-1 solidated print, the combination oi: supporting 55 means for said plurality of photographic mem bers; supporting means for said light sensitive member; a light source and an optical system by „which printing light canbe transmitted succes sively through said photographic members upon corrresponding areas of said light sensitive memu and meancx i’or restricting the light reaching said device to that transmitted through selected areas of said‘individual photographic member to indicate the variation oí the cross sectional pat ternv or? said printing light which will match the contiguous margins oi the individual images printed upon said light sensitive member when projected thereon, so that the photographic members can be successively printed upon said 35 light sensitive member to produce a print hav- ing substantially uniform density. 5. In a photographic printer :for printing con tiguous complementary images on a single iight sensitive member from a plurality or” complemen 40 tary photographic members to produce a con solidated print, the combination oi: supporting means `ior said plurality oi photographic mem bers, supporting means for 'said light sensitive member; a light source and an optical system by which printing light can he transmitted succesu sii/ely through said photographic members upon corresponding areas of said light sensitive mem ber; a presettable control means corresponding to each ksaid photographic member i’or varying 50 the intensity and cross sectional pattern oií said iight to compensate for varying densities of said photographic member; a light intensity indicat ing device positioned upon said printer, in cluding an element movable into and outA or the iight path, for measuring the intensity of the light transmitted through each individual photo» graphic member; and means for restricting _ the iight reaching said device to that transmitted through selected areas of said individual photo ber; means for varying the intensity and cross ' graphic member to indicate which setting oí the sectional pattern of said light to compensate i'or corresponding control means will vary the cross varying densities of said photographic members; sectional pattern oi said printing light to match a light intensity indicating device positioned up the contiguous margins of the individual images on said printer, including an element movable into and outof the path of said light, for meas uring the inœnsity of the light transmitted through each individual photographic member; - and mask means movable into and- out or the 70 light path for restricting the light reaching said device to that transmitted through selected inar ginal areas of said individual photographic mem ber to indicate the variation of the cross sec tional pattern of said printing light which will* match the contiguous margins of the 'individual printed upon said light sensitive member when 65 projected thereon, so that said control. means can be preset and successively operated and the cor responding ;photographic members successively printed upon said light sensitive member to pro duce a print having substantially uniform den sity. 70 6. In a photographic printer for printing con tiguous complementary images on a single light sensitive member from a plurality of comple mentary photographic members to produce a 75 9 2,180,798 consolidated print, the combination of: support ing means for said plurality of photographic members; supporting means for said light sensi tive member; and an optical system and a light source including a plurality of lamps by which printing light >can be transmitted successively through said photographic members upon cor responding areas of said light sensitive member; presettable control means corresponding to each 10 photographic member for varying the energiza tion of each of said lamps to vary the intensity and cross sectional pattern of said light to com pensate for varying densities of said photographic members; a light intensity indicating device, in 15 cluding an element movable into and out of the path of said light, for measuring the intensity of the light transmitted through each individual photographic member; and means for restricting the light reaching said device to that trans mitted through selected areas oi said individual photographic member to indicate which setting oi' said control means will vary the cross sec tional pattern of said printing light to match the contiguous margins of the individual images 25 printed upon said light sensitive member when projected thereon, so that the control means can be preset and successively operated and the cor responding photographic members successively printed upon said light sensitive member to pro 30 duce a print having substantially uniform den consolidated print, the combination of: support ing means for said plurality of photographic members; supporting means for said light sensi tive member; an optical system and a light source including a plurality of lamps by which printing light can be transmitted successively through said photographic members upon corresponding areas of said light sensitive member; presettable control means corresponding to each said photo graphic member, each control means including a presettable means for each of said lamps for varying the energization of each of said lamps to vary the intensity and cross jsectional pattern of said light to compensate for varying den sities of said photographic members; a. light in 15 tensity indicating device positioned upon said printer, including an element movable into and out of the path of said light, for measuring the intensity of the light transmitted through each individual photographic member; and mask 20 means for restricting the light reaching said de vice to that transmitted through selected areas oi' said individual photographic member to in dicate which setting of the resistors of each control means- will vary the cross sectional pat 25 tern of said printing light to match the con tiguous margins of the individual images printed upon said light sensitive member when projected thereon, so that the control means can be pre set and successively operated and the correspond 30 sity. ing photographic members successively printed 7. In a photographic printer for printing con tiguous complementary images on a single light upon said light sensitive member to produce a sensitive _member from a plurailty of comple 35 mentary photographic members to produce a print having substantially uniform density. LEON T. ELIEL.