WO1989006809A1 - Dispositif servant a mesurer des doses de rayonnement - Google Patents

Dispositif servant a mesurer des doses de rayonnement Download PDF

Info

Publication number
WO1989006809A1
WO1989006809A1 PCT/FI1988/000007 FI8800007W WO8906809A1 WO 1989006809 A1 WO1989006809 A1 WO 1989006809A1 FI 8800007 W FI8800007 W FI 8800007W WO 8906809 A1 WO8906809 A1 WO 8906809A1
Authority
WO
WIPO (PCT)
Prior art keywords
measuring device
film
clock
radiation
cassette
Prior art date
Application number
PCT/FI1988/000007
Other languages
English (en)
Inventor
Heikki Sakari Hirvonen
Aimo Olavi Guttorm
Original Assignee
Heikki Sakari Hirvonen
Aimo Olavi Guttorm
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heikki Sakari Hirvonen, Aimo Olavi Guttorm filed Critical Heikki Sakari Hirvonen
Priority to PCT/FI1988/000007 priority Critical patent/WO1989006809A1/fr
Publication of WO1989006809A1 publication Critical patent/WO1989006809A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/02—Dosimeters
    • G01T1/08—Photographic dosimeters

Definitions

  • the object of the present invention is a radiation dose measuring device, which comprises a radiation sensitive indi ⁇ cator.
  • the measured radiation may then be gamma, beta or X-ray radiation.
  • the purpose of the present invention is to provide such a ra ⁇ diation measuring arrangement that is appropriate to be used even by the large public and by means of which the variation of the radiation quantity may be observed as time passes.
  • the radiation sensitive indicator is brought into motion with regard to a shield that is only locally per ⁇ meable, as presented in claim 1.
  • the indicator i ⁇ preferably a film, which may have the form of a ring or a windable tape.
  • the film is moved by a clock mechanism and disposed e.g. around the clock mechanism.
  • the indicator film is advantageously disposed in a leaded cassette provided with an opening, whereby the clock comprises a window or preferably a lens at the place of the opening.
  • the movement of the indicator film can be connected to the move ⁇ ment of the clock so that the cycle of the entire film may be e.g. a couple of months.
  • the clock or the cassette casing also contains the film developer and the fixative batching boxes .
  • the measuring device according to the invention can conse ⁇ quently be a separate device, however, the device is described below in terms of examples and particularly in connection with a clock, with reference to the enclosed drawings, in which
  • figure i presents schematically a view from above of the measuring device according to the invention connected to a clock
  • figure 2 presents a lateral view and a partial section of the same device
  • figure 3 presents a detail enlargement of figure 2
  • figure 4 presents a view from above and a partly open section of an element of the device
  • figure 5 presents a view from above of the film cassette
  • figure 6 presents a lateral view and a section of the film cassette
  • figure 7 presents again a schematic view from above of the clock provided with a measuring device as in figure 1 figure 8 presents a section along the line A-A of figure 7
  • figure 9 presents another embodiment of the measuring device according to the invention, the clock being open
  • figure 10 presents a lateral view and a section of the closed device of figure 9
  • figure 11 presents a schematic view from above of a third embodiment of the device according to the invention
  • figure 12 presents a section along line a-a of figure 11.
  • This embodiment comprises a leaded cassette 4 disposed around the real mechanism of the clock or the dial plate 7 and into which a radiation sensitive annular film 5 has been inserted.
  • An opening is provided at one point of the cassette, as repre ⁇ sented in figure 5, and at a point corresponding to this ope ⁇ ning a window or rather a lens 1 of the clock case, through which the film may be observed, and an exposure opening 2 are disposed.
  • various filters can be placed in front of the exposure opening.
  • reference numeral 3 denotes a calendar type plate of the clock, having a cogged periphery, as represented by figures 3 and 4.
  • the plate 3 is in continuous motion and cooperating with its cogging is a cogged wheel 8 on the axis of the clock button, thus rotating along with the plate 3.
  • a pair of cogged wheels is further provided on the axis, which grip into the perforation in the annular film, as it appears from figure 3.
  • the cassette surface supporting the film comprises annular grooves 6, to which the cogs of the cogged wheels 9 extend through the film 5.
  • the grooves 6 can best be seen in figure 6.
  • the movement of the radiation sensitive film 5 can be adapted by means of the gearing for instance so that the film accomp ⁇ lishes an entire cycle in three months. After this, the film, or more precisely, the entire cassette 4 is exchanged.
  • Either the clock case itself or the cassette may be equipped with a film developer box 10 and a fixative box 11.
  • the drive mechanism is naturally disposed at the point of the opening of the cassette 4.
  • the box may extend relatively far into the direction of the periphery, however, their discharge openings are naturally disposed at the point of the cassette opening, consecutively and immediately after the exposure window.
  • the developer box 10 and the fixative box 11 may be part of the very cassette,, or diposed in the case or be constituted of an appropriate capsule to be inser ⁇ ted into a cavity in the case.
  • the ra ⁇ diation doses received during different periods are easily observable after the developing.
  • the cassette construc ⁇ tion can be placed around the clock-work from above or from below, depending on the arrangement. In the case described, the cassette is supposed to be fixed to the clock from below.
  • Figures 9 and 10 present an alternative embodiment.
  • the clock case is here disposed to be opened around a hinge, so that the annular film 5 on the periphery of the annular plate 3 can be mounted, the clock being opened. In the described example, the clock case has to be leaded. However, it is quite possible to place an entire cassette including the film inbetween the clock halves.
  • Reference numeral 12 denotes a gasket separating the the discharge openings of the developer box and the fixa ⁇ tive box from each other.
  • FIGS 11 and 12 illustrate a third embodiment, in which the watch is essentially rectangular, and on one of its longitudinal sides a cassette 4 containing the tape-like film 5 has been disposed.
  • Reference numeral 13 denotes a cogged wheel connected to the watch mechanism, the other numerals denote the same as above.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Measurement Of Radiation (AREA)

Abstract

La présente invention décrit un dispositif de mesure des doses d'un rayonnement, qui est équipé d'un indicateur (5) sensible au rayonnement. Cet indicateur est de préférence constitué par un film annulaire (5) placé dans une cassette annulaire plombée (4) et le dispositif est relié avec une horloge, de sorte que le film est mû par le mécanisme de l'horloge. La cassette (4) et le film sont de préférence disposés autour du mécanisme de l'horloge et le boîtier de l'horloge est pourvu d'une lentille d'observation (1) disposée à l'endroit de l'ouverture ménagée dans la cassette. Des boîtes (10, 11) contenant un révélateur de film et un fixatif sont de préférence également placées à l'endroit de la même ouverture. La cassette est conçue pour être facilement interchangeable. Grâce audit dispositif, la dose de rayonnement peut toujours être observée à travers la lentille d'observation (1) pendant une certaine durée.
PCT/FI1988/000007 1988-01-22 1988-01-22 Dispositif servant a mesurer des doses de rayonnement WO1989006809A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI1988/000007 WO1989006809A1 (fr) 1988-01-22 1988-01-22 Dispositif servant a mesurer des doses de rayonnement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI1988/000007 WO1989006809A1 (fr) 1988-01-22 1988-01-22 Dispositif servant a mesurer des doses de rayonnement

Publications (1)

Publication Number Publication Date
WO1989006809A1 true WO1989006809A1 (fr) 1989-07-27

Family

ID=8556441

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1988/000007 WO1989006809A1 (fr) 1988-01-22 1988-01-22 Dispositif servant a mesurer des doses de rayonnement

Country Status (1)

Country Link
WO (1) WO1989006809A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1578489A (fr) * 1967-08-21 1969-08-14
US3570239A (en) * 1969-05-13 1971-03-16 Georges Ruedin Sa Wristwatch with means for checking radioactivity of the environment
DE2702836A1 (de) * 1977-01-25 1978-07-27 Frieseke & Hoepfner Gmbh Personendosimeter
DE3332075A1 (de) * 1982-09-17 1984-03-22 Max Lehner & Co. AG, 5722 Gränichen Vorrichtung zur registrierung der strahlenbelastung von mit strahlung umgehenden personen
US4608655A (en) * 1982-04-16 1986-08-26 The Regents Of The University Of California Wristwatch dosimeter
DE3616387A1 (de) * 1986-05-15 1987-11-19 Norbert Sadler Strahlenmessvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1578489A (fr) * 1967-08-21 1969-08-14
US3570239A (en) * 1969-05-13 1971-03-16 Georges Ruedin Sa Wristwatch with means for checking radioactivity of the environment
DE2702836A1 (de) * 1977-01-25 1978-07-27 Frieseke & Hoepfner Gmbh Personendosimeter
US4608655A (en) * 1982-04-16 1986-08-26 The Regents Of The University Of California Wristwatch dosimeter
DE3332075A1 (de) * 1982-09-17 1984-03-22 Max Lehner & Co. AG, 5722 Gränichen Vorrichtung zur registrierung der strahlenbelastung von mit strahlung umgehenden personen
DE3616387A1 (de) * 1986-05-15 1987-11-19 Norbert Sadler Strahlenmessvorrichtung

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