Патент USA US2405233код для вставки
Aug. 6, 1946. R_ H, PECKHAM 2,405,233 PHOTOGRAPHIC DEVELOPING TANK Filed Jan. 9, i945 COLORED SHEATH IIIIlHIH FIG. I ROBERT H. PECKHAM Patented Aug. 6, 1946 2,405,233 UNI TED STAT-ES PATENT OFF ICE ' 2,405,233 ‘ BHOTOGRAPHIC DEVELOPING'II‘ANK Robert H. ‘Peckham, United States‘Navy Application‘January 9, 1945,: Serial No. 572,?042 " 2 Claims. (01. 95-4-96) _ _ ‘(Granted under the act of ~Marchv'3, ‘11883, as ~~amended April‘ 30, 1928 ; 7370 0. JG. L757) :1 V 'This. invention relates‘to ‘a ‘device -for use in photography, and more 'especlally'to a'receptacle adapted to facilitate processing sensitized 'ele ments such as ?lms,‘plates and records. ' 'Heretofore, ‘it ‘has ‘been ‘necessary 'to process sensitized elements such'as ?lms, after exposure, 2 a material ‘which inhibits the passage of that portion of radiant energy to'which the sensitized element ‘being ‘treated is most sensitive. ‘More speci?cally, 'thedevice comprises a transparent receptacle into‘ which ‘the ‘sensitized element may be placed'for processing, and a shield ‘or sheath that ‘is, to develop and "?x the ‘?lms in a dark room with the aid of artificial "light, usually "red adapted-‘to envelope“ the receptacle, the shield'be ingadapted "to transmit ‘sufficient visual radiant light, ‘the color, ‘howeven‘being ‘varied in accord~ energy to permit ‘observation of the sensitized ance with ‘the ‘characteristic ‘of the ‘?lm "being IO element 'duringthe processing, but having in processed. Dark "room operation is'at best ‘dif ?‘cult, and it is impossible ‘in ‘the light ‘that ‘is afforded to ‘tell with'any certainty the “progress of development - or to ‘study ‘the photo-"recorded corporatedtherein, "a ‘material which will inhibit that portion‘ of the visualradiant energy'to which the ‘sensitized element ‘is particularly sensitive from'getting to the sensitized element, so ‘that subject as it develops. Moreover, the elapse 'of 15 further “activation *of ' the ‘sensitized element will time "between ‘taking the undeveloped ?lm or not‘take-place'during/processing, even‘ though‘the record into ‘the dark room,'developingit and re receptacle is exposed‘to white .light. turning it‘in a?nishedstate-‘for study, 'may be The inventiorrwill ‘now be described with ref considerable, since‘the'dark room ‘is usually 10 erence‘to the accompanying drawingin which: cated-ata place remote from the place atwhich 20 Fig. 1 is a-n'exploded view-of‘a cylindrical re the ‘photograph ‘is taken. This time 'element ceptacle for-‘receiving 'a sensitized element ‘for may be the difference between life'anddeath, development, together-with a shield incorporat particularly in "cases which require the study~of ing~a material "for cutting out a givenportion of heart actions,‘ and ‘in'which‘electro-cardiographic the’ visual 'radiant- energy; records must'be processed by~development. --Sim 25 ~Fig.'~2 showsa perspective view of a rectangular ilarly, time (may be very important» in otherpho receptacle and sheath; and tographic work relating to medical examination. Fig. 3~shows aperspectiveview of a developing In this type of work,-it is highlydesirable ~to~be tray and-a shield'inthe'form of a cover-forthe tray. able to study the results of the record orpho tograph -at the bedside-of ‘thepatient -so-that the This invention comprises a developing tank or attending physician »may have the information tray Which-isto be used‘for developing sensitized before‘lhim immediately, ‘and while ‘he is observ elementslsuch asphotographic ‘?lm, paper; plates ing the condition of the patient. ‘With thisiin or records, but ' particularly ' recording paper 1 that view, it igan-objectof ‘this invention to'provide has been-‘used in preparing electro-cardiographs, a device-for processing» a sensitized element such 35 so that‘ theattendant physician may examine the as a ?lm or record, immediately-upon ‘removal record during its development ‘at the bedside of from the camera, .or :otherdevice for exposing the patient, and hence-beable to determine al the sensitized element,-'after exposure, vwhich-will most immediately the nature of the heart action eliminate the necessityof a dark-room processing, which ‘has’v beenrecorded thereon. While the~in~ which will permit continuous observation :of (the vention is particularly ' useful in making ‘the ‘in sensitized element throughout its development formation recorded ‘by photography immediately and which will be simple and effective for any available, -it-is to be‘understood that it is'not con typeof sensitized element, whetheritlbe of the ?ned -in~any aspect to medical (Work, but it is type employed ‘for making electro-cardiographic equally applicable'to any kind of photographic records, or the ordinary photosensitive ‘?lm used work,‘ and-when used,>enables the person develop in photographic work for technical'or esthetic ing the-?lm or record to'study almost immediate purposes. 7 » As-illustrated-herein, the invention resides in ly ‘the recorded‘ information, whether this be‘of a-teohnical or esthetic -nature,‘without' the-neces a device for-use in processingsensitized elements, sity of a‘dark room and dark room equipment. comprising a receptacle which consists ofa ma 50 The invention is‘based upon“ the fact- that sensi terial‘ which normallypermits the passage of all tized~emu1sions have'been developed which are the components parts of visual radiant energy selectively sensitive to certain components ‘of and a material which inhibits the passage of-a white light-and not to others. This sensitivity selected (portion ‘of said visual radiant energy, the receptacle being selected‘whichincorporates ‘ ofl-the emulsion can -be so carefully controlled ' that it-is possible-to develop'a ?lmhavinga sensi 2,405,233 3 4 ture l5 centrally thereof through which may pass the handle of the ?lm holder and agitator which is customarily disposed in receptacles of this tized emulsion of a given character in ordinary white light, provided a shield is provided which will prevent that part of the white light to which the emulsion is sensitive from reaching the ?lm. The idea of blocking out all of the light except that which is least active in changing the char acter of the emulsion in order to prevent further character. The exposed ?lm, together with the developing solution, is placed in the receptacle. This may be carried out in a dark room or any other convenient place from which light may be excluded. When this has been done, a shield l8 exposure, and the latter in only such a small in the form of a cylindrical hollow sleeve is amount that the ?lm is but dimly visible, has been known for a long time, and has been prac 10 slipped over the body portion of the receptacle N], that is, the transparent portion thereof. The sleeve I8 extends from the bottom of the recepta ticed in some degree in the ordinary dark room where the ?lm has been developed while exposed cle up to and engages the under edge of the rim l4, and is so selected that the collar will prevent to a standard ruby light. However, it has not heretofore been thought possible to develop a photosensitive element except in the dark room, transmission of that portion of the white light and in the dark room even when a ruby light is employed, it is practically impossible to deter mine with assurance the recorded information , , during the process of the development of the ' which would cause further activation of the ?lm. When this is done, the receptacle may be taken , outof the dark room into the light and the process of development may be continued in day element. 20 light without damage to the ?lm, thereby en abling an interested person to observe the devel The important aspect of the present invention opment of the ?lm while it is taking place. resides in equipment for processing a sensitized Another form of receptacle is shown in Fig. 2, element such as a photosensitive ?lm or record denoted by reference character 20. This recepta in white light without further activation of the cle is rectangular in cross section and consists of a body portion 22 which is composed of clear glass or plastic, an opaque bottom 24 and an corded information as it develops. This can be opaque rim 26. An opaque cover 28 is provided accomplished by selecting a sensitized element which is adapted to ?t over the rim 26, and a that is sensitive to a given portion of white light but not to another portion thereof, and providing 30 colored sheath 3|] is adapted to ?t over the body portion of the receptacle up against the rim 26. a shielding device which will not transmit any In Fig. 3, there is shown still another form of of the light to which the element is sensitive dur developing receptacles, which in this case, takes ing the development thereof. For example, a the form of developing tray 32, the tray being shield may be made up which will transmit only about 50% of incident visual illumination by 35 formed of an opaque material and consisting of walls 34 and a bottom 36. A cover 38, composed incorporating therein a uniform distribution of of a colored material which will prevent the orange particles. For a ?lm of a given sensi transmission of light rays which would further ' tivity, this will act as sufficient protection for activate the ?lm being developed, and yet will the sensitive emulsion during development and sensitized emulsion, and at the-same time, en 25 abling an interested person to examine the re yet will enable the person developing the ?lm to ' 40 permit the transmission of sui?cient white light to enable the operator to observe what is going observe what is taking place. If an ortho-chro on, is provided. It is to be observed that while each of the de porating red particles and transmitting about veloping receptacles shown in Figs. 1, 2 and 3, are 20% of visual illumination will provide protec tion against further activation and yet permit 45 provided with sheaths which are formed of ma terial including coloring matter which prevents visual observation of the ?lm. No attempt will the transmission of a given portion of white light, be made herein to list the many kinds of sensi such sheaths are entirely unnecessary, since the tive emulsions, to what portion of white light transparent body of the receptacle itself may be they are sensitive and what should be. used to matic ?lm is being developed, a shield incor shield them. It is su?icient to say that for any 50 formed of a material which incorporates parti cles of colored matter which will give the same sensitive emulsion there is a suitable material e?ect. The only advantage of a separate sheath for blocking out substantially all of the radiant is that a single receptacle may be provided with energy to which it is sensitive, or at least enough a plurality of sheaths to take care of different so that satisfactory results can be obtained. As carried out herein, the invention takes the 55 types of ?lm, thus eliminating the necessity of an excessive number of receptacles. form of a developing tank or tray which consists While the invention has been described with of a material which transmits white light, and reference to developing tanks, it is equally ap a material which inhibits the transmission of a given portion of white light, or is provided with plicable to any other receptacle to be used for a shield consisting of a material of like charac 60 processing sensitized elements. The invention described herein may be manu— teristic. The tank or its shield is selected so that factured and used by and for the Government of it inhibits the passage of light which is detri the United States of America for governmental mental to the sensitive emulsion of the ?lm to purposes without the payment of any royalties be treated, that is, which will cause further acti vation thereof after the ?lm has had its original 65 thereon or therefor. What is claimed is: exposure and yet permits the transmission of l. A photographic ?lm developing tank for suf?cient white light to enable the person devel strip type ?lm wherein the ?lm may be observed oping the ?lm to see what is taking place. In throughout its entire development comprising a Fig. 1, there is shown a more or less exploded view of a cylindrical receptacle l0 which is com 70 base portion, a single cylindrical wall rising from the edges of the base portion, and a removable posed of a clear glass or plastic, or other trans-, closure on the top of the chamber so formed, said parent material having an opaque bottom 12 and removable closure being supported by the upper an opaque rim M. A cover 16, composed of an edge of the cylindrical wall, the wall portion be opaque material, is provided which will ?t tightly over the Tim M, the Cover having the usual aper- I8 tween the top and the base of the chamber be 5 2,405,233 ing made of a material which will transmit sub stantially all light in the visible portion of the spectrum, and a separate light inhibiting ?lter of a generally cylindrical shape and having an in side diameter slightly greater than the outside diameter of the tank which ?lter when applied therein, a substantially light-impervious cover for 0 over the Wall of the chamber inhibits the passage therethrough of radiant energtr in the portion of the spectrum to which the ?lm being processed is most sensitive. 2. A photographic ?lm developing tank where said container, and means for preventing the pas sage through the transparent portion of the con tainer of light which will impair the ?lm de velopment including a ?lter means surrounding the container, said ?lter means inhibiting the passage Within the container of radiant energy in the range of the spectrum to which the ?lm being processed is most sensitive, the container walls 10 and ?ltering means being disposed around all the in the process of development may be observed in ordinary room illumination as it takes place com prising, a container made of transparent material and formed to contain a developing solution 15 sides of the container to permit observation of the container contents from various angles and by re ?ection of light upon various portions of the con tainer contents. ROBERT H. PECKHAM.