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Q Nov. 5, 1946. 2,410,722 0. J. ECKERT FILM VIEWING DEVICE Filed Jan. 31, (1944 3 Sheets-Sheet 1 W; \ I VENTOR BY . ,ww, ATTOR YS ~ Nov. 5, 1946. 2,410,722 c.’ J. ECKERT FILM VIEWING DEVICE Filed Jan. 31, 1944 3 Sheets-Sheet 2 CLARENCE J. ECKERT INVENTOR BY .m? .éaau} 72L 7 ATTOR EYS ‘Nov. 5, 1946. c. J. ECKERT I 2,410,722 ' FILM VIEWING DEVICE Filed Jan. ‘31, 1944_ 5 Sheets-Sheet 3 CLARENCE J. ECKERT INVENT R /7ATT0RN " Patented Nov. 5, 1946 2,410,722 UNITED STATES PATENT OFFICE 2,410,722 FILM VIEWING DEVI-CE Clarence J. Eckert, Rochester, N. Y., assignor to Bausch & Lomb Optical Company, Rochester, N. Y., a corporation of New York Application January 31, 1944, Serial No. 520,457 8 Claims. (Cl. 88—39) 2 1 the movable ?lm holder. This permits the de This invention relates to a ?lm viewing device vice to be made more compact in size for the and more particularly to apparatus for viewing ?lm holder need only be formed of sufficient ?lms of di?erent widths at varying magni?ca length to permit the two ?lms of diiferent widths tions. Continuous ?lms are now widely used for mi Cr to be inserted therein as one of the'?lms held in the ?lm holder need only be positioned relative cro?lming records, papers, and the like, for secur to the light opening and movement of the ?lm ing miniature reproductions of the same without holder thereafter to position the ?lm in the view the necessity of referring to the original docu of the eyepiece need not be had. The eyepiece ments and also to realize the many advantages accruingfrom condensing the information con 10 can'then be moved to a position wherein the en tire reproduction on the ?lm of lesser width may tained» therein in a small space for storage and be viewed or can be successively moved to view transportation purposes. These ?lms usually each half of the reproduction on the ?lm of come in two different widths and it is, therefore, greater width, dependent upon the ?lm selected desirable to employ a viewing device having struc for observation. This permits the length of the ture for permitting either of the ?lms to be ?lm holder to be decreasedywhich effects a de viewed at the option of the user. crease in the length of the device. , The viewing device of the present invention will In another modi?cation of the invention, the accommodate the two ?lm sizes generally used device is formed to permit a relatively largearea and yet is sufficiently compact to permit a user to easily handle the same. The device is pri- - of the ?lm to be held in the ?lm holder for the viewing of the same and the eyepiece and auxiliary marily- intended to be used by a worker in the lens are mounted for movement the length and ?eld and can be readily carried on the person width of the ?lm. By so doing, the eyepiece may of the user. be positioned to permit any part of the illu It is the principal object of the present inven minated ?lm to be viewed successively or, if de tion to provide a compact ?lm viewing device for sired, indiscriminately. It will be apparent that observing selected portions of one of two ?lms of in this embodiment of the invention, the device different‘ widths at varying magni?cations. For is advantageous for rapidly viewing either of the this purpose, in the preferred embodiment of the ?lms for the frequency of positioning and align invention, the device comprises a casing having a chamber extending longitudinally thereof and 30 ing a new section of the ?lm in the ?lm holder, as had in the other forms of the device, is dis in which is movably mounted a transparent ?lm holder having spaced slots of different widths pensed with. ' The ?lm viewing device of the present inven for receiving ?lms of different widths. The cas tion, and its modi?cations, is simple in construc— ing is so formed that the ?lm holder may be moved to position selected portions of one of 35 tion, easy and economical to manufacture, may be readily assembled and is easily adjusted in use. the ?lms between a light opening in the casing Further objects and advantages of the present and an eyepiece carried by a cover plate secured invention will appear in the following speci?ca to the casing. The eyepiece may then be focused tion and in the accompanying drawings in which: and will produce a magni?ed image of the re Fig. 1 is a side elevation, partly in section, of production on the ?lm for viewing purposes. the ?lm viewing device in its preferred form. The lens system of the eyepiece of the device Fig. 2 is a top plan view of the same. has a ?eld of view su?icient to permit the ob Fig. 3 is a top plan view of the ?lm holder for servation of the entire reproduction of the ?lm holding two different widths of films. of lesser width but only half the reproduction Fig. 4 is a section taken on line 4-4 of Fig. 1. of the ?lm of the greater width. This is desirable Fig. 5 is a top plan view of a modi?cation of to insure the compactness of the device for the the present invention. easy handling and ready carrying of the device. Fig. 6 is a side elevation, partly in section, of If desired, the magni?cation of vthe reproduc the same. tion on the ?lm may be increased for the minute examination of the same by an auxiliary lens sys Fig. '7 is a top plan view of another modi?ca tem mounted in the cover plate for movement tion of the present invention. into the optical axis of the eyepiece. _ Fig. 8 is a side elevation, partly in section, of In a modi?ed form of the invention, the eye the same. ‘ v piece and auxiliary lens system are movable as .The preferred embodiment of the invention is a. unit relative to the illuminated ?lm held in 55 illustrated in Figs. 1 to 3 wherein the device com 2,410,722 3 . 4 prises a casing Ill having an opening II formed in the bottom wall thereof. The opening is closed by a transparent plate I2 slidably mounted in a channel I3‘ formed in the bottom wall and of a size suil'icient to close said opening in all posi tions thereof. The plate I2 actually forms a por tion of the bottom wall of the casing and, in the barrel 15 to limit downward movement of the tube. The ?eld of view of the eyepiece lens system is such as to include the entire width of the ?lm IE but only half the width of the ?lm ll, With this construction, the device is maintained at a min_ into the ?lm holder, the upper surface of the plate I2 is formed with a pair of channels I8 and I9 of different widths and each having a shoul der formed in the opposite walls thereof as at H member 42 integral with the lens barrel 43 hold ing the eyepiece and the raised portion 44 hous ing the auxiliary lens 45. The slide member 42 is con?ned within the channel M ‘by a pair of retaining plates 46 and 47 engaging the upper edge surfaces of the slide member, The plates imum size so as to a?ord greater convenience preferred embodiment of the invention, is used to and facilitate its use. carry the ?lm to be viewed. In the modi?cations shown in Figs. 5 and 6, the The casing includes a cover plate M which is 10 ?lm viewing device there shown diiTers from that formed with an integral barrel I 5 for receiving a of Figs. 1 to 4 in that the eyepiece and auxiliary plurality of lenses forming an eyepiece for view lens contained in the lens barrel and raised por ing the ?lm. The casing I9 and cover plate I4 tion integral therewith are mounted for move are preferably molded of a plastic material to ment as a unit in the cover plate 4.1}. For this permit the ready formation of the same. purpose, the cover plate 48 is formed to provide To permit the ?lms I6 and II to be inserted a channel M in which is movably mounted a slide and 22, respectively, for receiving the edges of the ?lms I6 and II. To prevent the ?lms from buckling and to hold the ?lms ?at, a plate 23 having apertures 23’ and 24’ is cemented to the top face of the transparent plate I2 and engages the edges of the ?lms re ceived in the shoulders 2I and 22, As the ?lms are engaged only at their edges, there is little likelihood that the portion of the ?lms carrying 46 and 41 are secured to the cover plate by screws, as shown. The eyepiece comprises the lenses 43 and 49 which are carried by a tube 59 threaded into tube 5i which in turn is threaded into lens barrel 43. It will be apparent that the lenses may be focused by turning the knurled portions of the tubes 59 the image becoming scratched by contact with 30 and 5|. The auxiliary lens 45 is mounted on the viewing device. slide 52 so that it may be selectively positioned The eyepiece carried by barrel I5 comprises the in or out of cooperative relation with the eyepiece lenses 25 and 26 which are mounted in tube 2'! slidably held in tube 28 which in turn is slidable in barrel I5 whereby the eyepiece may be focused. In operation, the ?lm holder may be moved by lugs 28, formed integral with the plate 23 and lenses in order to vary the magni?cation. The casing 53, carrying the cover plate 40, is provided with a channel 54 in which is slidably mounted a glass plate 55 having on its face cut away portions 56 and BI. An opaque plate 58 having spaced apertures 59 and 60 is cemented to the top of plate 55 with the apertures sub extending laterally therefrom, to position a se lected portion of one of the ?lms between the opening II in the casing I0 and the eyepiece 40 stantially in alignment with the cut-away por carried by the cover plate I4. The ?lm will be tions 56 and 51. The under surface of plate 58 illuminated by the passage of light through the has shoulders 6| and 62 formed, respectively, opening I I and the ?lm holder so that a magni along the sides of the apertures 59 and 56 so as ?ed image of the reproduction on the ?lm may to provide slideways for receiving the two ?lms, be viewed upon focusing the eyepiece. '‘ B3 and 64. In many cases, it is desirable to secure a greater In operation, the ?lms 63 and 54 are inserted magni?cation of a, selected portion of the repro in the slideways formed between plates 55 and duction on the ?lm than afforded by the lenses 58. The ?lm holder may be moved by means of 25 and 26 of the eyepiece. For this purpose, the the lugs 65, integral with plate 58, to selectively magni?cation of the ?lm image may be aug- - position the desired ?lm in alignment with the mented by movement of an auxiliary lens 29 eyepiece and the opening 66 formed in the casing into the optical axis of the eyepiece. To e?ect 53. When the wider ?lm 64 is opposite opening this desired result, the lens 29 is mounted in a 66, the respective halves of the area in alignment slide member 30 carried in a raised portion 3| may be selectively viewed by moving slide 42 of the cover plate I4. The raised portion 3! is by grasping the barrel 43 so as to locate the eye formed integral with the barrel I5 and has a piece in the desired position. groove extending therethrough receiving the slide In the modi?cation shown in Figs. 7 and 8, the member 39. Referring now to Fig. 4, the slide device comprises a casing ‘I0 having a channel ‘II member 30 is held within the groove by retain which is slidably mounted a ?lm holder. The ing plates 32 and 33 secured to the surfaces of 60 ?lm holder is formed of a glass plate ‘I2 having the edges de?ning the groove by screws, as shown. on its upper face the cut-away portions 13 and ‘I4. To accurately position the axis of the lens 29 As in the other ?lm holders, an apertured opaque plate ‘I5 is cemented to the top of plate ‘I2 with with the optical axis of the eyepiece, the slide the apertures substantially in alignment with the member 30 is provided with a. stop pin 34 to limit cut-away portions. Adjacent the edges of the the inward movement of the lens 29 beyond a cut-away portions in the glass plate 12 there are predetermined position It will be apparent that formed shoulders ‘I6 so as to provide slideways for the lens 29 may be withdrawn to an inactive po the ?lms TI and ‘It. The ?lm holder may be sition beneath the portion 3| of the cover plate moved by means of the lugs ‘I9 formed integral upon movement of the slide member 39 in an out~ with plate "I5 and extending laterally from the ward direction. To facilitate the movement of casing. the member 3|], the outer end thereof is provided A plate 99 secured to the top of easing ‘I5 has with a groove 35 for engagement with a ?nger an upturned ?ange 8| extending around all sides of the user. To prevent the tube 28 contacting thereof. Slidably mounted on the top of plate 80 the slide member, a stop pin 36 is mounted in the is a slide member 82 having an integral upstand 2,410,222 6 stantially rectangular in form and ‘having an opening therein forming .a light passage; means tormoving said ?lm holder to position one of said Rotatablyl' mountedvin‘portion ‘83., is 'allstub shaft ?lms lini the-path of flight from said transparent ,88 car-ryin‘g'anarm .89 which holds the auxiliary lens”. By'meansof an arm Slthe lens 90 may iii portion; a, slidetmember movably mounted in said plate; said member‘formed substantially rectan be selectively swung intov or out .of‘operative rela gular in shape andof less area than said plate to tion with the lenses 88 and 81. The lens‘ 90 is permit movement of said member in any direc held. in selected position by means of the .pin 92-, tionon said plate; a lens barrel ?xed to said slide carriedby arm v89,-which ‘isurged into notch v93 '10 member‘; 'a'lens system ‘carried in said lens barrel by spring 94 surrounding shaft 88. ' . ‘for ‘(viewing :the illuminated ?lm; and a cover vMounted on the upturned ?ange 8.1. is the platelsecured vto said retaining plate and having cover plate 95- which has the centrally disposed an opening through which said lens barrel‘ex aperture 98 through ‘which the portion '83 ex tends, ‘the opening in said cover plate permitting tends. The aperture 96 is relatively large in ‘area movement of the slide member on said retaining but is smaller than the area of slide 82 which, in I plate the-length and width of the illuminated turn,E is'smaller than'the area con?ned byv-t'he ?lm to bring any selected portion of the ?lm in flange ‘8|. It 1will thus be apparent that the the ?eld of view ‘of said lens system. ' slide member 82,’ carrying the eyepiece, may be 3." A ?lm viewing (device comprising a casing, moved freely in different directions 50 as to posi tion the eyepiece in di?’erentlocations over the 20 said casing having a ‘wall having a slideway and an opening iorming a light passage; a ?lm holder ?lm which is in alignment vwith aperture ‘91 in _ slidably mounted in said slideway adjacent said the bottom of casing 10 and the aperture 98 in opening, said ?lm holder having guideways of plate 80. ' different widths ‘for receiving ?lms of different In' this embodiment of the invention, the for widths; ‘a retaining plate ?xed to said casing for mation of the device permits a relatively large ing. portion :83 providedwitha bore .84 ‘for slidably ‘receiving the tubei'85 carrying lenses“ and 181. area of each ?lm to‘be- held in the-?lm holder for the viewing of the same. As the eyepiece is mov holding said?lm- holder in said slideway, said re taining ‘plate formed substantially rectangular in form and having an opening therein forming a light passage; means for moving said ?lm holder to position one of said ?lms in the path of light from said opening; a slide member movably desired, indiscriminately. mounted in said plate, said member formed sub It will be apparent from the foregoing that I stantially rectangular in shape and of less area have attained the objects of my invention and than said plate to permit movement of said mem provided a compact ?lm viewing device for view ber in any direction on said plate; a lens barrel ing selected portions of one of a plurality of ?lms ?xed to said slide member; a lens system carried of different widths at varying magni?cations. in said lens barrel for viewing the illuminated Various modi?cations other than those shown ?lm; a cover plate secured to said retaining plate and described may obviously be made without and having an opening through which said lens departing from the spirit of my invention or the scope of the appended claims. 40 barrel extends, the opening in said cover plate permitting movement of the slide member on said I claim: retaining plate the length and width of the il 1. A ?lm viewing device comprising a casing, luminated ?lm to bring any selected portion of having a. wall formed with an opening providing the ?lm in the ?eld of view of said lens system; a light passage; a ?lm holder slidably mounted a slide member movably mounted in said ?rst in said casing adjacent the opening in said wall; named slide member; an auxiliary lens system said ?lm holder having guideways of different carried by said second-named slide member; and widths for receiving ?lms of di?erent widths; a means for moving said slide member to position cover plate for said casing; a slide member I said auxiliary lens system with the axis thereof mounted in said cover plate for movement in a plane parallel to the plane of the illuminated 50 in alignment with the axis of said ?rst-named lens system. ?lm; a lens barrel ?xed to said slide member; a 4. A ?lm viewing device comprising a casing, lens system carried in said lens barrel for viewing lens means carried by the casing, a wall of the the illuminated ?lm; a slide member movably casing having an aperture in alignment with the mounted in said ?rst-named slide member; an auxiliary lens system mounted in said second 55 lens means, a ?lm carrying member within the casing, said member comprising a light transmit named slide member; means for moving said ting plate having integrally formed channel holder to position one of said ?lms between the. means for slidably supporting ?lms of di?erent opening in said wall and said ?rst-named lens widths, said member being slidably mounted system; means for moving said ?rst-named slide member to position any selected portion of the 60 within the casing to selectively position the differ ent ?lms in alignment with the lens means, and illuminated ?lm in the ?eld of view of the ?rst means externally of the casing for moving the named lens system; and means for moving said ?lm carrying member. second-named slide member to position said aux 5. A ?lm viewing device comprising a casing iliary lens system with the axis thereof in align ment with the aXis of said ?rst-named lens 65 having an aperture in a wall, lens means carried by the casing in alignment with the aperture, a system. ?lm carrying member mounted within the cas 2. A ?lm viewing device comprising a casing, ing, said member comprising a transparent plate said casing having a wall having a slideway and having channels for receiving ?lms of different a transparent portion forming a light passage; a ?lm holder slidably mounted in said slideway ad 70 widths and an opaque plate having apertures se able the length and width of the ?lm, the eye piece may be positioned to permit any part of the illuminated ?lm to be viewed successively, or, if jacent said transparent portion, said ?lm holder having guideways of di?erent widths for receiv ing ?lms of different widths; a retaining plate ?xed to said casing for holding said ?lm holder in said slideway, said retaining plate formed sub cured to the transparent plate above the chan nels to provide ?lm guideways, said member being slidably mounted within the casing to selectively position the di?erent ?lms in alignment with the 75 lens means. 7 2,410,722 6. A film viewing device comprising a casing having a wall provided with an aperture, lens means carried by said casing in alignment with the aperture, a film carrying member movably mounted within the casing, said member com of the mounting means whereby the slide may be moved longitudinally and transversely to selec tively position the lens means relative to the ?lm. 8. A ?lm viewing device comprising a casing, top, bottom, and intermediate walls on the casing, said walls having apertures which are in align formed on a surface thereof, an apertured metal ment, a slide mounted to move in transverse and plate secured to the channeled surface of the longitudinal directions between the top and in transparent plate whereby the channels provide termediate walls, mounting means carried by the ?lm guideways, and portions on the metal plate 10 slide in alignment with an aperture in the slide, extending through slots in the casing whereby the lens means carried by the mounting means, said member may be moved to selectively position a mounting means projecting through the aperture ?lm in operative relation to the lens means. in the top wall, means for holding a ?lm between 7. A ?lm viewing device comprising a casing, the intermediate and bottom walls and in align top, bottom, and intermediate walls on the casing, 15 ment with the apertures therein, the area of the said walls having apertures which are in align aperture in the upper wall being larger in longi ment, a slide mounted to move between the top tudinal and transverse directions than that of the and intermediate walls in transverse and longi mounting means whereby the slide may be moved tudinal directions, mounting means carried by longitudinally and transversely to selectively po prising a transparent plate having channels the slide in alignment with an aperture in the 20 sition the lens means relative to the ?lm, and sup slide, lens means carried by the mounting means, plementary lens means carried by a holder on the said mounting means projecting through the ap mounting means, said holder being swingably erture in the top wall, means for holding a ?lm mounted, and means for retaining the holder in between the intermediate and bottom walls and adjusted position whereby the supplementary lens in alignment with the apertures therein, the area means may be selectively moved into or out of co 25 of the aperture in the top wall being larger in operative relationship with the lens means. longitudinal and transverse directions than that CLARENCE J. ECKERT.