US2676267A - Identification-film locket - Google Patents

Description

April 20, 1954 H. s. POWELL 2,676,267

IDENTIFICATION-FILM LOCKET Filed Jan. 22, 1951 IN V EN TOR.

A 7'7'ORNE ys Patented Apr. 20, 1954 IDENTIFICATION-FILM LOCKET Harry S. Powell, Oakland, Calif., assignor of onehalf to Ben K. Lerer, San Francisco, Calif.

Application January 22, 1951, Serial No. 207,220

11 Claims. (Cl. 250-68) This invention relates to a locket of a type suitable for identification of the wearer, particularly in the event of disaster. The locket also will serve to provide ready reference to the extent of exposure of the wearer to radiation such as would result from the release of an atomic explosion.

In the event that an atomic explosion should be experienced, immeasurable assistance could be given to medical personnel in diagnosing the injurious effects thereto upon exposed persons should it be possible to obtain without delay some ready reference and indication of the extent of actual exposure. The death rate resulting from the exposure to such radiation might be reduced to a considerable extent if the cases where the exposure was minimal could readily be separated from those where prompt medical treatment would save the exposed person. At the same time, parties exposed to the radiation effects only to a minor degree would undoubtedly recover more rapidly from the shock in the event that they could be given reasonable assurance that the extent of their actual exposure could readily be ascertained and measured. As was pointed out at page 342 in the recent publication entitled The Effects of Atomic Weapons, revised in September, 1950, it is possible to measurethe effects of radiation by exposing a film to the effects thereof. Such a film should preferably be of the slow process variety in order that it may not become completely blackened by relatively low radiation excitation. It has been established that exposure to radiation varying between zero and twenty-five (25) r. (Roentgen) produce no obvious injury to persons. Exposures in the range between twentyfive (25) and fifty (50) r. cause possible blood changes, but generally no serious injury is experienced. As exposures are more severe and in the range between fifty (50) and one hundred 100) r. some blood cell changes are usually produced. These effects are such as to cause some injury, but no real disability of a permanent character i likely to result. When the exposures are such that the radiation to which the party'is subjected varies between one hundred (100) and two hundred (200) r., injury and possible disability occurs. As the exposure increases to the range between two hundred (200) and four hundred (400) r, injury and. disability is considered certain. Death is even possible in some cases. An exposure of four hundred (4.00) r. is fatal to about half the people exposed. Exposures to six hundred (600) r. or more total body radiation always prove fatal.

With this knowledge, the present invention has as one of its objectives that of providing a container, capsule or locket wherein a photographically sensitive suitable film may be housed in light-tight as well as moisture-proof fashion. This film is capable of recording the exposure 2 to which the party carrying the locket or container has been subjected.

Should such an atomic blast occur various forms of radiation result. These are alpha rays (the positively charged helium ion) and the beta rays (the positively or negatively charged electrons) which do not travel any great distance and, in addition, the more harmful gamma rays which travel as electromagnetic waves for long distances. It is particularly radiation of this type which becomes important to check andmeasure. The device herein to be described is par ticularly useful for this purpose although, as will be pointed out later herein, the same device may be used to measure the substantially non-directional neutron radiation.

Th container or locket arrangement is of such character and curvature that the retained film is held therein in a position such that radiation occurring in any of three mutually perpendicular planes, and thus from any direction possible, will be registered. It is particularly important that the contained film shall be non-directional to radiation because it is only in this way that it is possible to determine accurately the amount 0 radiation received by the wearer.

The invention also provides a container or looket in which there is a cavity or recess in which identification data may be included for the purpose of providing both personal identification and medical record. Such data might include, for instance, a designation of blood type and other special medical comment, such as peculiar conditions of treatment which must be given to the party because of physical condition. Illustratively, persons having heart ailments, respiratory difficulties or suilering from diabetic condition could not withstand the same treatment as a person of normal physical state.

The locket or container herein to be described is of such character that -it; may be opened for the purpose of inspecting or removing the identification .data of both the personal and medical characteristic without in anyway exposing the film therein contained to light radiation which would cause the film to fog. The film is supported and within the locket in a position such that the effects of radiation are immediately recognizable as exposures thereon, but the container may be disassembled to remove the identification data without removing orotherwise exposing the film which is held in a separable portion thereof. Thus, after exposure, the locket portion holding the film may be sent for development and later identified with the wearer.

The invention has for further objectives those of providing for quick screening of exposed parties in order to separate readily the irradiated wounded from the non-irradiated wounded, as well as the non-irradiated unwounded from the V completely non-irradiated groups.

It also has as certain of its other objects and advantages those of permitting, after inspection, rapid decisions by trained personnel as to the need of the party for immediate first aid or the possibility of routing the exposed party through to the channels for evacuation purposes.

The segregation at the first aid station can then be expedited by a rapid processing of the film held within th container or locket. This processing will require only a rapid development processing of the film to an extent such that a comparison of the exposed film with a step-wedge piece of film representing a standard for which the various steps have been carefully exposed to progressively increasing specific amounts of radiation may be made. Then, it becomes possible immediately to identify the degree of radiation. to which the party has been subjected. The stepwedge film with which the immediately devel oped loclretor cartridge-contained film com.- pared provides a calibrated film usable for diag nostic purposes. The radiation determination is made, as would be expected, by matching the darkening on the exposed film (representing the exposure of the person) with the closest matching step on the wedge. The wedge has suifieiently wide spread in density to maize matching by the eye of the observer both fast and accurate. The result is that, after a very little practice the maximum variation encountered in determining radiation dosage is less than 1.0%. It is likely unnecessary to remark that both the unknown and the step-wedge film should be viewed by diffused light for the purpose of exmination.

After the film has been developed, compared with the step-wedge standard and general designations have been made at the first station, it is possible to process the non-wounded only at the screening station, so that the irradiated parties may be separated from the non-irradiated. In addition, accurate decisions on the need for further treatment or discharge are at once possible. Proper evacuation then may proceed. in a most expeditious manner. As those persons that have been irradiated are removed to the hospital after having checked the film the previous analysis of the radiation status at the first aid station where the dosage determination has ben made at the most rapid rate possible, generally serves to permit more rapid and adequate use of facilitates and the concentration of specialists in the first instance than would otherwise be possible.

Other objects of the invention are those of providing a locket or container for holding both film and identification information which will be extremely reliable in its operation. Various experiments have shown that film is the most reliable method known for recording radiation on an individual basis. Flm has considerable advantage over other proposed methods, because of (l) the accuracy with which it represents the radiation experienced, (2) the low manufacturing cost, (3) the light weight and small size, (a) the fact that it provides a permanent record which is particularly usable at later times for medical purposes, and (5) the record also may eventually find use even as documentary evidence in courts. Although it is recognized that film has the disadvantage of the developing time required, the preciseness with which developing must ocour, and the fact that it is difficult to make readings in the field which will be representative of the exposure experienced, the overall advantages of film recordings nonetheless generally outweigh any of those advantages which may be claimed for other methods known for making measure rnents.

It is a further object of the present invention to provide an exposure checking device from which the produced record shall be substantially insensitive to temperature change. This insures the accuracy of the produced record being at all times maintained.

Also an object of the invention to provide a film locket in which the recording element stantially sealed against moisture, growths, mites and the like. The invention as a still further purpose that of providing ways and means by which neutron radiations determined provided they are sufiicient to be discernible by any presently known form of counters.

lhe film and locket or container arrangement herein to be described in further detail and w rich makes possible the attainment of the foregoing other objectives is of a character such ti it can be worn at all times without annoyance; it is small and does not require attachment to the clothes of the wearer, and it is unlikely to be harmed or damaged in wearing. This is not possible with the so-called personal ion-charm bered radiation meters because they are so particularly sensitive to jarring. They are also accurate in damp weather and require ire charging. The socalled Geiger-lv lueller countsis impossible or application on an indi dual basis in any of the forms in which it is now used. It also suffers from the disadvantage that it ceases to function at extremely low levels of radiation. Other forms of indicators, such as the chloroform dye, are known, but are generally in the development state and have not so far prover. reliable. Glasses and chemical crystals are still in the laboratory stage, and have questionable reli ability. Each is usually quite subject to temperature changes.

The arrangement herein to be described provides the advantage of all other forms of indiweight, easy to transport, inexpensive a chase and relatively easy to seal against. tl

Various other objects and advantages will become apparent from the description or" the components hereinto be set forth and illustrated by the accompanying drawings wherein:

Fig. l, which is in two parts, shows a plan view of the cup-shaped cover member looking inwarcily, with an indication of the positioning of the edges of the film strip therein, and also shows sectional view through approximately the middle of the cover to show the curved film supporting surface making the unit non-directional to radiation;

Fi 2 shows the cruciform film recording strip, both in a flattened state and in a curved state, as when held in the cover member;

' by the liner secured thereto;

Fig. 6 schematically illustrates a form of identification record suitable for being fitted within the cavity between the liner and the front plate when the several components are in assembled state; and,

Fig. 7 is an exploded view to show the assembly relationship between the cover, film, liner, ident fication record and front plate components.

Referring now to the drawings, the cover plate H is of generally parallelogram or rectangular form and cup-shaped, as indicated particularly by Figs. 1 and '7. The ends and sides It! and I3 respectively of the parallelogram or rectangular shaped cover plate are each curved to form the cupped configuration. Adjacent edge surfaces of the SO-fOIIl'led parallelogram (herein assumed for illustration as a rectangle) are thus shaped as an arced edge whose curvature is Substantially 90 of the arc of a circle whose center is on a line which bisects the angle between adjacent edges of the rectangular area formed of the inardly-turned edges. The inwardly-turned sides extend in a direction substantially 90 to the plane i l of the base of the rectangular area. With all opposite edge surfaces being similarly inwardly turned, each of the so-called corners as represented at it constitutes essentially the surface area of a quadrant of a hemisphere having a radius like that of the curved edge.

Opposite edges it of this cover have inwardlyextending beaded or knurled lips, or the'equivalent, serving to hold and retain the edges ll of a film l8 of cruciform shape. The edge may be formed by means of a knurling tool moved over the edge surface.

" When positioning the cruciform-shaped film 58 within the cover I I, opposite film edges Eli are held by the edge It.

cated edges on thecover plate, .where desired, the cover plate may be. very slightly recessed at its edge so that the edges I9 of the film will be held thereunder. The film i8 is of such size thatwhen held at its edges to the edge of the cover the film area itself rests tightly against the inner surface of the cover. -In some instances the knurling may be dispensed with since the resilience of the supported film is often considered sufficient to hold it to thecover plate surface. effect is maintained when the liner 2! and the sealing compound (if used), later to be described, are in position of use. v

.A liner element 2!, having an outward surface shape corresponding substantially to the inner surface shape of the cover member is used as a light shield and closing element to enclose the cover-contained film. The liner also has up turned edges to form it into a cup-shaped element which is substantially like theinner surface of the cover member I I; .Op'posite edges. 22 of this liner may be' provided overat least a jiiait" or the beaded edge 22, also generally'y similar .'to;'tl i e Similarly, opposite edges ill of the film areheld by similar oppositely-lo- The holding 'e'dges of the cover. This" beaded edge 22'is adapted, when the liner is positioned, to fit into the cover member H to hold the therein sup ported film l8 in a relatively tight position relative to the cover. This tight fit may be provided by the outer knurled or beaded edge 22, for instance, held against the inward beaded edge l6 extending over at least a part of the inner peripheryof the cover element. In some instances the components may fit tightly enough to make knurling unnec'essarybut', as a general rule, the tighter fit is obtained in the described manner.

The illustration of Fig. 3 shows the liner member with the beading or knurling extending around the complete periphery thereof. It has been found, however, that a suficiently tight fit may be had where the heading is used. Such beading may be confined to the straight edges of the liner strip for ease of fabrication. In this state the rounded corners of the cover and liner fit sufi'iciently tight with respect to each other to still provide a light-tight shield and cover for the film strip supported between them.

The liner strip and the cover strip are the sole housing members for the film upon which the record is to be produced. As such, both serve to support and locate the film, as well as to keep extraneous light therefrom. The film, when it is supported within the cover member if of the parallelogram shape illustrated is of generally cruciform shape and is turned upwardly, as at ll and iii of Fig. 2, so that each of the edge surface ii and 19 extend at an angle of approximately with respect to the fiat basesurface 23 thereof. The surface 23 rests upon the flattened surface 23 of the cover member, and is supported therein by the flat surface 2 3 of the liner element. Thus, at time periods when the film would be subjected to radiation by reason of an atomic explosion, for instance, it is of no consequence that the film is being worn and carried by a person in such a way that only a part of the film can be considered to be in position which is transverse to the radiation path of the rays that are to influence the film. Suffice it to say that the film is so supported that regardless of the direction of radiation, one of the edge surfaces l'! or E9, or'the fiat surface it resting upon the fiat surface 23' ofthecover, will be subjected to that radiation to provide a record of that intensity which prevailed. The significant fact is that even an extremely small area of exposure in the film is adequate to obtain a measure of the exposure. V 7

One manner ofholding the film it within the cover It is illustratively represented by Fig. 5. There, both the film and the liner are held by the lip Iii of the cover and supported in a man" ner such that the liner, when positioned adjacent the cover, serves, by its cup-shaped recess, to provide a cavity 25'wherein appropriate data or other records, illustratively represented at 2%, may be kept.

The completeassembly then may be closed by means of a front plate member 2'! which i of generally fiat construction with slightl inwardlyturned edges 23. The front plate member is also of rectangular shape and of a configuration such that the edge thereof may be arranged to fit, along with the liner, generally over an outer edge l5 thecover platel H Q The general relationship'iof lthe. various components for assembly purposes is indicated by Fig. 7, where it' can [be seen that th film i8 is positioned immediately adjacent the cover member H. The edges l1? and it of the film are then fitted into the cover to press closely against its inner surface. The inner beaded edge is of the cover member I I holds the film in the container in such a way that its central portion I8 is adapted to rest in flattened state against the flattened surface 23 of the cover member. l'his permits the tab-like ends i! and 29 forming the cross then to curve to follow the contour of the cover, as already explained. This assembled relationship of the filmand its cover member i l is then maintained by pressing the liner element 22 inwardly upon the cover in such a way that the beading 22 on the outer edge of the liner is tightly caught by the beading on the inner surface of the cover member.

By virtue of the similarity of shape of the liner and cover, the upper surface of the liner provides a reces or cavity relative to the Cover 2i into which the identifying data or record, schematically represented at 25, may be placed. The cover element 21 is then placed over the complete assembly of the cover and liner with their edges placed tightly together. Slight pres-- sure exerted upon the combination is sufficient to close the assembly to form the cover and closure plate as one component holding the film and the associated liner thereto to hold identification data. The assembled unit then becomes o so erally pillow-shaped form in the embodiment illustrated. The front piece 2i may be separated from the cover member ii in any convenient way, such as by a knife edge, file or some ether element, to permit the data or record to removed. The liner 22, however, fits generally tight with respect to the cover, and consequently holds the film l8 carefull secured therein. These two components are then separated at the time of development b tapping the cover, for

instance, to jar loose the liner. This is done in a dark room so that the film contained within the cover shall not be fogged.

As shown by Fig. 4, one of the components, such as the cover H or the front piece 27, has a tab 3! attached thereto. This tab is rovided with an opening 52, through which a chain or cord or the equivalent is to be placed and to be attached to the wearer. In the instance shown, the tab is attached to the front piece for reason of convenience. The front piece usually has stamped therein some identifying number for record purposes. This identifying number, as designated, for instance, by the numerical indicia 33 on each of the film l8 and the record 26, then serves to identify the film with the locket or container, and with the directive for treatment. After development, the number shown on the film will appear on any record or prints made thereafter.

Various materials for stamping the locket are usable. However, one convenient form is stainless steel, from which an appropriate stamping may be made. This material is one that is preferred because it is non-staining to the skin and non-irritating, although other materials, such as aluminum, for instance, may be used with general equal facility. Further, in assembling the components together it may be borne in mind that the front plate and liner assembly generally snapv into the cover. is placed between the cover and the liner such a way as to be held tightly therein, and to be rotected from damage and exposure. complete assembly is such that it cannot be readily disassembled, and yet it is such that at first aid stations a small tool, such as a knife, nail file or the like can separate the front plate from the liner and cover assembly (with the thereincontained film). Then further, the assembly is such that although opening of the liner with respect to the cover is not easy, it can be accomplished by an adept jarring motion. Accordingly, inadvertent exposure of the therein-contained film to light is unlikely.

Curvature of the locket, as described, is essential to its operation, since it makes the film non-directional to radiation. This is necessary in order to obtain any accurate determination of the actual amount of radiation received by the person. After the film has once been exposed to radiation and the exposed locket is transported to the first aid station, development of the exposed film may be carried on in any desired manner.

While it is not the purpose of this disclosure to set forth in detail the manufacturing procedure by which articles of this character may be fabricated, it is nonetheless to be noted that the several components herein described may be formed by suitably stamping in dies. Thus, in three pressing operations, the three main components, namely cover, liner and front piece, may be stamped or pressed from various materials to appropriate form and shape for assem bly.

Since the efficiency of the operation of recording upon the film surface 88 in the event radiation occurs is determined to some extent by the ability to maintain the film in a dry state, as well as free from all effects of fungus, mold, and the like it is often desirable to provide ways by which it may be sealed into the cover ii. One hermetic sealing operation which has proved to be satisfactory is by use of a generally cold-flowing plastic material which may be applied to the components when they are in a warmed state. A sealing compound of this character may be very like the form used to seal lenses into optical instruments. As such, one formula which may be suggested is a composition comprising:

Per cent Lamp black 2.5 Burgundy pitch e25 Beeswax 35.0 Tricresyl phosphate 2.0 Acrawax C 18.0

Mold, fungus, and mite inhibitor, as required (usually about of 1%) The foregoing percentages are by weight and the formula is generally like that of a sealing compound manufactured by Glyco Products Co., Inc, of Brooklyn, New York for sealing lenses except that unvulcanized rubber is omitted and replaced by an increased percentage of burgundy pitch. In the formulav the tricresyl phosphate has a softening reaction; the acrawax C (also sold by Glyco Products Co., Inc., supra) is used to give a water-proofing effect; and the mold, fungus and mite inhibitor may be of the powder form and formed of a salt of propronic acid and be either a calcium or a sodium propronate. The lamp black, burgundy pitch and beeswax are standard products. Where the inhibitor is chosen in a of 1% proportion it will be apparent that the burgundy pitch may be proportionally reducedto a value of 424%, for instance, without destroying the general characteristics of the plastic as such.

' The compound above described is applied to the cover and liner elements are heated to a temperature in the general range between 120 F. and 140 F. The compound then is applied to the edges 12 and iii of the cover and the edges 22 of the liner. At this heat the compound tacks to the metal of the cover and liner. The plastic is represented illustratively at 39 on the cover of Fig. 1 and at ll on the liner of Fig. 3. Then, when the cover and liner are pressed together the plastic covering the edges of the liner and the cover coalesces and forms the tight seal for the film.

Prior to assembly of the cover, film and liner it is usually desirable to dust the inner surface of the cover and the outer surface of the liner (1. e., the surfaces adjacent the film 18) with the mold, fungus and mite inhibitor. This insures an adequate dryness and freedom from contamination prior to assembly. Also, after assembly the complete unit can be dipped in a suitable plastic (such as well known polymers) for water-proofing purposes and since the metal itself picks up particularly the alpha and beta radiation.

In some instances it becomes desirable to provide ways and means by which neutron radiation, which occurs generally in random or nondirectional form and originates more or less as a cloud, can be picked up. The neutron radiation will generally be picked up by the metal of the locket (even where it is fully plastic coated),

but not in sufiicient quantity to give any considerable indication of such effect even with a sensitive Geiger counter. Provided other elements which are of greater sensitivity with respect to neutron radiation are used in cornbination with the complete assembly, there will be a more pronounced indication obtainable of what neutron radiation has occurred. To this end, and in View of the fact that the radiation is not directional, an extremely small pellet or strip of gold'foil, for instance, may be placed between the cover member if and the liner 21 prior to assembling the components with the film i8 also positioned therebetween. This gold pellet or strip may be placed on either side of the film, and then, when exposure has occurred, the foil of the metal will radiate to affect the film and produce thereon a latent image, which like the latent illlage of the gamma ray effect, becomes optically discernible upon film development.

It is also possible to utilize other elements which are particularly sensitive to neutron radiation, illustratively, a suitable sulphur compound, as a replacement for the gold. However, if this procedure be adopted it is particularly desirable that the sulphur be placed within a suitable Wrapper, such as cellophane, to prevent its coming into direct contact with the film surface.

It of course will be appreciated that it is not essential to the operation of the invention, inso far as the detection of the gamma radiation is concerned, that the gold or sulphur be used. However, where such components are used they may be considered, illustratively, to be placed within the cover member ii prior to assembly, and, as such, may be assumed to be represented by the foil or pellet shown at 43 in the exploded view of Fig. 7.

As a convenient way of making use of the film and to permit rapid development it is often desirable that there be a small hole with a slot extending outwardly therefrom, as shown at 45 in Fig. 2. This provides a ready way to hook the film in such a way that it may be supported in the developing, fixing and washing processes.

Various modifications of the arrangement herein disclosed are, of course, clearly within the scope of this invention. Among those which may be practiced, for instance, are those involving the manner of attaching or securing all of the cover, liner and front plate together. This may be provided readily by increasing or decreasing the length of the mentioned beads. In the alternative, to avoid the necessity of forming an internal head on the cover member, the effect may be provided by providing slight crimping of the edge at spaced points along the periphery of the straight sides of the cover member. This need be only sufiicient to hold and position the film edges and the same time form an element into which the outer bead on the liner plate may be secured. In this way the outer bead may be provided in the liner over its entire periphery, and fit tightly to the complete periphery of the cover element. This insures a tighter fit between the components and precludes all possibility of light exposure of the film contained within the cover and shielded by the liner element. Also, it will be apparent that various forms of snap fastenings may be resorted to in addition to those set forth. Further, from the standpoint of the invention, the shape of the locket may be appropriately chosen to be other than rectangle or parallelogram with upturned edge provided the surface contour is such that the film therein contained may be so positioned as to be subject to radiation in all directions. Illustratively, it may be of generally hemispherical shape but under such circumstances it is desirable to slit the film in various sectorial shaped cut-outs in order that it may be capable of being positioned between the liner and the cover.

Having now described the invention, what is claimed is:

1. A locket adapted for holding a radiation sensitive film comprising a substantially cupshaped cover member having inwardly-turned edges extending to planes substantially normal to the plane of at least a portion of the main cover surface to provide generally planar areas in each of three planes normal to each other; a liner closure member of shape substantially similar to that of the cover and suificiently smaller than the cover to be fitted therein to provide a light-tight compartment between them; a front plate of peripheral shape corresponding to that of the inwardly-turned edges of the cover plate; and means to secure the front plate to the cover plate.

2. A locket adapted for holding a radiation sensitive film comprising a substantially flat parallelogram outline cup-shaped cover member having inwardly-turned edges, extending to planes such that the adjacent sides are substantially normal to the plane of the main cover surface to provide generally planar areas in each of three planes normal to each otherya closure and a liner member of shape substantially similar to that of the cover and sufliciently smaller than the cover to be fitted therein to provide a light-tight com partment between it and the cover; a front plate of peripheral shape corresponding to that of the inwardly-turned edgesof the cover plate; and means to securev the front plate to the cover plate.

3. An identification locket adapted for holding a radiation sensitive film comprising a cupshaped cover member of generally parallelogram outline having the outer peripheral edges inwardly-turned to a position substantially normal to the plane of at least a part of the surface area of the cover member to provide generally planar areas in each of three pla es normal to each other; means to support a film upon the interior surface of the cover; a closure and liner member of shape substantially similar to that of the cover andsufiiciently smaller than the cover to be fitted therein and to secure the film between the cover and liner in light-tight manner so that it shall have substantially maximum sensitivity to radia ti'on without regard to the direction of origin thereof; a front plate of peripheral shape corresponding to that of the inwardly-turned edges of the cover plate; and means to secure the front plate to the cover plate and to provide between the inner face of the front plate and the liner a cavity to house removable material.

4. An identification locket adapted for holding a radiation sensitive film comprising a substantially cup-shaped cover member of enerally parallelogram form having the outer peripheral edges inwardly-turned to a position substantially normal to the plane of at least apart of the cover surface to provide generally planar areas in each of three planes normal to each other; means to support a film to cover a major portion of the interior surface of the cover; a liner mem ber of shape substantially similiar to that of the cover and sufliciently smaller than the cover to be fitted therein and to secure the film between thecover-and liner in light-tight manner so that it shall have substantially maximum sensitivity to radiation Without regard to the direction of origin thereof; a front plate of peripheral corresponding to that of the inwardly 'turned edges of the cover plate; and means to secure the front plate to the cover plate and to provide between the inner face of the front plate and liner a cavity to house removable material.

5. The locket claimed in claim 4 comprising, in addition, a holding tab secured to one of the cover and front plate members.

6. The locket claimed in claim 4 comprising, in addition, a holding perforated tab secured to the front plate member.

'7. The locket claimed in claim 4 comprising, in addition, a hermetical seal between the adjacent edges of the liner and cover members.

8. The locket claimed in claim '7 wherein the hermetic seal is plastic.

9. The locket claimed in claim 4 comprising, in addition, a metallic element to absorb neutron radiation positioned between the cover and the liner.

10. An identification locket adapted for holding a radiation sensitive film comprising a substantially parallelogram outline cup-shaped cover having the peripheral areas thereof turned to extend in planes substantially normal to the plane of the parallelogram outline surface to provide surface areas in three planes each normal to the other, the edges of the inwardlyturned areas also forming a parallelogram pattern with rounded corner areas each curved to include substantially a 90 arc of a circle having its center on a line bisecting the angle between the adjacent edges of the rectangular pattern, means for securing a substantially cruciform film tightly to substantially the complete inner surface of the cover so that the secured film has portions thereof extending in each of the three normally perpendicular planes, a liner member also having inwardly-turned outer areas to form the liner to a shape substantially duplieating that of the'cover with outer dimensions of the liner corresponding substantially to the inner dimensions of the cover, said liner having a depth corresponding substantially to that of the inner surface of the cover minus the thickness of the supported, film, means to secure the liner to the cover to form a light-tight container having substantially adjacent surfaces between which the film is adapted to be supported in a light-tight housing, a substantially flat front plate of peripheral shape corresponding to the outer periphery of the turned cover edges and means for securing the front plate and cover member together to provide a cavity for holding removable objects intermediate the cover and the inner surface of the liner.

11. An identification locket adapted for holding a radiation sensitive film comprising a substantially cup-shaped cover of parallelogram shaped peripheral outline having the peripheral areas thereof turned to extend in plane substantially normal to the plane of the parallelogram surface to provide surface area in three planes normal to each other, the edges of the inwardlyturned areas also forming a parallelogram pattern with rounded corner areas each curved to include substantially a are of a circle having its center on a line bisecting the angle between the adjacent edges of the pattern, an inner and outer film gripping edge extending along at least a part of the cover edge for securing a substantially cruciform film tightly to substantially the complete inner surface of the cover so that the secured film has portions thereof extending in each of the three normally perpendicular planes, a liner member also having inwardlyturned outer areas to form the liner to a shape substantially duplicating that of the cover with outer liner dimensions corresponding substantially to the inner dimensions of the cover, the said liner being of a depth corresponding substantially to that of the inner surface of the cover minus the thickness of the supported film, said liner having a gripping edge extending over at least a part of its outer edge and in regions thereof substantially corresponding to the film gripping edges of the cover, a substantially fiat front plate of peripheral shape corresponding to the outer periphery of the cover, and means for securing the front plate and cover member together and for providing intermediate the cover and the inner surface of the liner a cavity for holding removable material.

References flited in the file of this patent UNITED STATES 'PATENTS Number Name Date 395,515 Robertson Jan. 1, 1889 548,791 Wilcox Oct. 29, 1895 1,840,908 Lozier et al. Jan. 12, 1932 2,255,999 Kuehner Sept. 16, 1941 2,387,887 Dimsdale et al. Oct. 30, 1945 2,426,884 Kieffer Sept. 2, 1942 2,483,991 Wollan et al. Oct. 4, 1949 2,496,218 Kieffer Jan. 31, 1950 FOREIGN PATENTS Number Country Date 7,824 Great Britain of 1887 OTHER REFERENCES Photographic Film As a Pocket Radiation Meter, Pardu'e et al., MDDC 1065, June 23, 1947, pages l-7.

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