Патент USA US2412246код для вставки
Dec. __10, 1946. MLEQBLUMENSTEIN ' ‘2,412,246 PROJECTION PICTUR'E FEEDING MECHANISM _ ‘ Filed, July 28 , 1945 . .5. WW. ., wum'm. 3A‘ MaxEBllunensib ire, ‘ 36 14!’ I 15 lr 1:4 26 . 1 Patented Dec. 10, 1946 unrrso STATES I PATENT OFFICE 2,412,246 PROJECTION PICTURE FEEDING HANISM MEC , ' Max E. Blumenstein, Hyattsville, Md. Application July 28, 1945, Serial No. 607,551 3 Claims. (Cl. 88--28) 1 This invention relates to an improved mecha nism for feeding picture slides to a viewing po sition. The general object of the invention is to pro vide a simple, practical, inexpensive and reliable step-by-step, ?nger-operable mechanism which is e?ective, by each step of operation thereof, to shift one projection picture slide from a view ing position and, simultaneously, to take from a magazine and shift to said viewing position another slide to be viewed. A special and important object of the inven tion is to provide a mechanism for the purpose stated embodying stop means to limit each step of operation thereof and to insure that upon completion of any given step of operation there of a picture slide taken from the magazine and shifted to the viewing position by that step of operation will be disposed accurately in the view 2 Figure 2 is a central, vertical section through the mechanism; and Figure 3 is a horizontal section on the line 3-3 of Figure 1. ' Referring to the drawing in detail, A designates Ya portion of the casing of a projection picture slide viewing apparatus and I0 designates a ver tically disposed wall or panel mounted in any suitable manner within said casing behind the frontv wall ll thereof. Also mounted in any suitable manner within the casing A are upper and lower rollers l2 and I3 over which is trained an endless belt [4 hav ing outer and inner reaches Ma and [4b, respec 15 tively, the former of which is suitably constrained to travel against or adjacent to the front face of the wall or panel l0 and the latter of which is ‘ suitably constrained, as by means of other suit ably mounted upper and lower rollers l5 and [6, 20 respectively, to travel against or adjacent to the ing position. rear face of said wall or panel Hi. According to theinvention there is provided In the belt [4 are a number of apertures l1 at the viewing position an aperture with which which are of equal sizes and equally spaced apart the successive picture slides are brought into longitudinally therealong. As said belt is ad alinement by successive steps of operation of the mechanism and through which said slides are 25 vanced apertures of the respective reaches there of obviously will become alined, and at a location illuminated for viewing purposes, and in this where two of said apertures become alined the - connection another special and important object wall or panel I0 is provided with a single aper of the invention is so to construct the mecha ture IS. in the present instance this aperture nism that it acts to close said aperture as one picture slide is being removed from the viewing 30 I8 is located approximately midway between the rollers l2 and I3 at what may be termed a view position and another is being shifted from the ing position for the projection picture slides to magazine to said viewing position. be viewed. a . Another special object of the invention is to The function of the belt M is to feed picture provide a mechanism for the purpose stated em bodying an endless belt as a slide shifting ele 35 slides successively to the viewing position and, of course, to remove viewed slides from that po ment, whereby the mechanism always is operable in the same manner and in the same direction to effect shifting of the slides regardless of their number. With the foregoing and other objects in view, which will become more fully apparent as the nature of the invention is better understood, the same consists in a mechanism for the purpose sition. To this end, means is provided for deliv ering to said ‘belt picture slides to be advanced thereby to the viewing position, and other means is provided for advancing said belt in steps each, equal to the spacing of the apertures therein to feed the slides successivelyto the viewing posi tion. . ’ .' , The picture slides are designated as [9 and stated embodying the novel features of construc tion, combination, and arrangement of parts as 45 are of the'well-known type comprising a rectan~ gular frame 20 carrying a picture ?lm 2|. They will be hereinafter more fully described, illus are of equal sizes and may be fed to the belt [4 trated in the accompanying drawing and de?ned either by hand or from a magazine or any other in the appended claims. ' V suitable feeding means. In the present instance In the accompanying drawing, wherein like characters of reference denote corresponding 50. a magazine 22 is illustrated as a containing and 'feeding means for them.’ This magazine is lo parts in the different views: cated at a suitable elevation above'the viewing position in front of the front reach Ma of the belt I4 and may be inclined downwardly toward bodiment of the invention, the front wall of the casing containing said mechanism being removed. 5.5,. said front reach sothat the slides 19, which are Figure 1 is a front elevation of a mechanism constructed in accordance with one practical em :_ . 2,412,246 3 4 stacked vertically therein, will gravitate toward being equal to the amount of upward movement said front reach. Alternatively, the magazine may be disposed horizontally and spring means‘ may be provided to urge the slides toward the front reach Ma. required of the member 25 to permit the pawl 29, during upward movement of the member 25, to snap above the said projection 32. From its uppermost position the permissible amount of downward movement of the member 25 is equal to the spacing of the pawl 29 above the afore Advance of the belt I4 is in a direction such that its front reach Md travels downwardly and its rear reach Mb upwardly. Onvv said belt,>jbe-'v said projection 32 plus the spacing of the belt apertures l1. It will thusjbe' apparent that with low eachaperture l'l therein as regards its di rection of advance, is a picture slide support 23. the belt H3 in a position with a pair ofits aper-v tures H alined at the viewing position and with the member 25 in its uppermost position, down ward. movement of said member 25 to its lower These supports may be of any suitable form and. are illustrated in the present instance as come. prising small ledge-forming'pieces suitably fas-r I tened to said belt and projecting outwardly" ' therefrom. They are adapted to have the. slides? 15 i9 rest at their lower edges thereon to support. the slides parallel or substantially parallel to the front reach Ma at the front thereof, and, ' they are spaced‘ below the apertures l’! to sup most position will result in contact of the free end of the pawl 29 with the projection 32 di rectly therebelow and advance of the belt one step equal to the spacing of the apertures ll, with the result that a picture slide supported by ' the belt above the viewing position will be moved. port the, slides with their picture’ ?lms 2! in 20 downwardly to, the viewing position. At the alinement with said apertures. . same time, a slide in !the', viewing, position will be moved downwardly from that position to be The inner, open end of the magazine 22 is dis posed adjacent to the front reach Ma. of the discharged either by. said step of advance o'f'the belt I4 so that as said’ belt is advanced and each belt or by‘a subsequent step of advance thereof, support. 23 moves to a position below said maga 25 depending upon how far the front reach ofthe zine,.a slide, I9’ is deposited thereon to be carried to the viewing position.' As the belt is advanced and, its lower portion recedes rearwardly about the lower roller [3, the supports 23 are shifted from beneath the slides and, the latterrgravitate' 30 from the' mechanism to be collected for repeated viewing whenever desired. In this connection, a suitable receptacle 24 preferably is provided to receive the slides as they gravitate from the mechanism. belt extends. below the viewingjposition. An arm 33' may extend from the member 25 I through a slot 34 in the front‘ Wall ll of the cas ing A and may be equipped. at its outer end. with a ?nger piece 35 to be pressedv downwardly to slide the member 25 downwardly,’ and- suitable resilient means, such as a coil‘ spring 35, may be provided‘ for returning said‘ member 25 to. its uppermost position when ?nger pressure is re-' 35 moved from said ?nger piece 35.. As the member ' The means for effecting step by step advance of the. belt [4 comprises a member 25 suitably mounted adjacent to one'side of the front reach ‘ 14a of the belt III for vertical sliding movement. 25 moves upwardly,‘ the pawl 29‘ obviously will snap above the next-projection 32 for engage; ment therewith to advance the, belt another step by the neXt downward movement of the member This member may be mounted for slidingmove 40 25. It will thus be apparent that as a result ' ment between a' pair of guide rails 25 carried by of successive steps of advance of the belt. M, pic the wall or panel‘ l9 and its vertical movement ture slides will be fed successively from the mag is limited by suitable stop means which, in the azine 22 to the supports. 23' and will, be. moved by present instance, .are illustrated as comprising the belt accurately to the viewing. position, while upper and lower stop lugs 21‘ and 28, respecs 45 viewed slides will simultaneously be discharged tively,'which, may be carried by the wall or panel successively from the mechanism. [0' and‘ with which the upper and lower edges of ‘Behind the viewing position is an.electriclarnp ' said member are respectively‘ engageable. ‘ 37 or any other suitable means forilluminating iPivoted ‘at one end‘ to the member 25 is a , the'?lms' 2|: ‘of the picture slides 19 whensaid pawl 29 which is, free to swing downwardly and 60 ?lms are in the viewing‘ position, while in‘. front. ' which is ‘constantly urged upwardly‘ by a ‘light’ of the Viewing‘ position is a suitable lens'oii lens ' spring 39 against a stop 3| carried by saidmem- ‘ system through which the ?lms are to be, viewed ber 25 and by. which its upward swinging move and which is, of course, effective to magnify the ment’ is limited; 'The free end of said pawl'nor pictures. The front wall H vofjthecasing A‘has, ’ mal‘ly overlies the adjacent marginal portion of ' 55‘ therein, of course, an opening‘ through which the the front reach Ma of the belt M in advance of 1 slides may be viewed. said front reach‘by an amount at least equal to Suitable stripsv 3-8 7 preferably areicarried; by.’ the thickness "of ‘the slides IQ for cooperation 1 the wall or panel H? for cooperation with said ‘ with ‘projections 32 which are carried by said I wall or panel, to form a track way for the'jfront : belt and whichextend‘ outwardly therefrom be reach Illa~ of‘ the belt it and to ‘hold. said'reach 80 yond the‘ outer or front faces of the slides I9 tol in a planar condition as well as" to hol'd'the slides be engaged by said pawl.‘ The projections 32 may be separate from I9 against lateral‘ movement‘ relative to' said supports 23 or they may be in vthe form of lugs ‘ reach. v However; any other jmeans may be» pro~ vided for these purposes. ‘ " f - . I '7 formed as integral parts of said supports ‘as 65 As the belt is advanced‘ it‘ isappareh'tl that the shown.) In'any event, the relationship of said portions of' the same ,between'fthe, apertures ~Iffi ‘ projections ,to the apertures l1‘ and the supports therein will act as curtainsto out off, light from 2'3,‘and the relationship of the member 25 to'thew . V beltld. and of the. pawl 29 to said member, all . are'such that’ when said- member25 is in its up-' permost. position, as shown in Figure ,1, and a pair of the-belt apertures l‘! are alined with 'each other and with the aperture t8, the. .free end ofv ‘ thepawl 2,9 is. disposed a predetermined. distance 'v above one of the projections 32, this distance the. lamp 31 at the VieWingQposition durin-glre . moval of one slide-from said position and feeding 70 of another slideto said position; = From the foregoingidescription.considered in" connection with the-accompanying- ifh'awingit is believed that the‘construction and operation of the. present mechanism. willbe'clearl-y under‘. stood and ‘its advantagesappreciated. It is de 2,412,246 5 sired to point out, however, that while only a single speci?c structural embodiment of the in vention has been illustrated and described, the same is readily capable of other speci?cally dif ferent structural embodiments within its spirit and scope as de?ned in the appended claims. I claim: 6 ing movement adjacent to said belt, stop means limiting the sliding movement of said member, resilient means tending constantly to slide said ‘member to its uppermost limit, projections on - said belt having the same spacing as the aper tures therein, a pawl carried by said member for cooperation with said projections so that each time said member is ‘slid from its uppermost to its lowermost limit the belt is advanced one step 1. A mechanism for feeding projection picture slides to a viewing position, said mechanism comprising a vertically disposed wall having 10 equal to the spacing of said belt apertures, said belt apertures being disposed so that for each therein an aperture de?ning the viewing posiw step of advance of said belt a new aperture of tion, a vertically disposed endless belt including each belt reach is brought into alinement with outer and inner reaches and having therein a plurality of apertures equally spaced apart lon the aperture in said wall, picture slide supports carried by said belt, said supports being indi gitudinally thereof, rollers over which said belt vidual to said belt apertures and each being lo travels and which are disposed to cause the outer cated to support a slide in alinement with its and the inner reaches thereof to travel over the related aperture, and a picture slide magazine outer and the inner faces of said wall, respec disposed to have picture slides delivered succes tively, a member mounted for vertical sliding movement, stop means limiting the sliding move 20 sively therefrom onto successive supports of said belt ‘as said supports reach positions in advance ment of said member, resilient means tending of the viewing position. constantly to slide said member to its upper 3. A mechanism for feeding picture slides to most limit, projections on said belt having the a viewing position, said mechanism comprising same spacing as the apertures therein, a pawl v an endless belt including outer and inner reaches carried by said member for cooperation with said and having therein a plurality of apertures equal projections so that each time said member is slid ly spaced apart longitudinally thereof, a member from its uppermost to its lowermost limit the mounted for sliding movement longitudinally with respect to said belt between retracted and disposed so that for each step of advance of said 30 projected positions, stop means limiting sliding belt is advanced one step equal to the spacing of said belt apertures, said belt apertures being belt a new aperture of each belt reach is brought into alinement with the aperture in said wall, movement of said member, resilient means tend alinement with its related aperture, and means for depositing onto each support as it reaches a position in advance of the viewing position a picture slide to be carried by said belt to the tracted position to its projected position said belt ing constantly to retract said member, projec picture slide supports carried by said belt, said tions on said belt having the same spacing as supports being individual to said belt apertures the apertures therein, a pawl carried by said and each being located to support a slide in 35 member for cooperation with said projections so viewing position. 2. A mechanism for feeding projection picture slides to a viewing position, said mechanism that each time said member is slid from its re is advanced one step equal to the spacing of said apertures, said apertures being disposed so that 40 for each step of advance of said belt a new aper ture of each belt reach is brought to the viewing position, picture slide supports carried by said comprising a vertically disposed wall having belt, said supports being individual to said belt therein an aperture de?ning the Viewing posi apertures and each being located to support a tion, a vertically disposed endless belt, including 45 slide in alinement with its related aperture, and outer and inner reaches and having therein a means for depositing onto each support as it plurality of apertures equally spaced apart lon reaches a position in advance of the viewing gitudinally thereof, rollers over which said belt position a picture slide to be carried by said travels, means to cause the outer and the inner belt to the viewing position. reaches of said belt to travel over and adjacent 50 to the outer and the inner faces of said wall, respectively, a member mounted for vertical slid MAX E. BLUMENSTEIN.