US3628019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-energy dosimeter and method of making same
Assignee: Individual
•
Filing: 1969-03-13
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Granted: 1971-12-14
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Expires: 1989-03-13
Abstract
Abstract A reliable low-energy dosimeter, and method of making same, which is capable of precisely measuring radiation at low-energy levels of approximately 30 Kev. and less; yet, such dosimeter is easily manufactured using conventional equipment.
Inventors
- 👤 Thomas P Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:59
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/02; H01J47/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
107 words
A dosimeter for detecting radiation comprising an outer tubular housing comprised of a plurality of end-to-end tubular sections, a first tubular section formed with an ionization chamber therein and being made of a material having a total mass attenuation coefficient which is substantially constant over a desired energy range having a low end at least 30 Kev. and a second tubular section being made of easily fabricated material means particularly adapted to enable easy installation of the components of said dosimeter therewithin and containing therein a charging electrode, said first and second tubular sections fitting together to provide communication between the charging electrode and the ionization chamber.
Claim 2
Dependent Claim
107 words
A dosimeter for detecting radiation comprising an outer tubular housing comprised of a plurality of end-to-end tubular sections, a first tubular section formed with an ionization chamber therein and being made of a material having a total mass attenuation coefficient which is substantially constant over a desired energy range having a low end at least 30 Kev. and a second tubular section being made of easily fabricated material means particularly adapted to enable easy installation of the components of said dosimeter therewithin and containing therein a charging electrode, said first and second tubular sections fitting together to provide communication between the charging electrode and the ionization chamber.
Claim 3
Dependent Claim
34 words
A dosimeter as set forth in claim 1 in which said first and second tubular sections have portions thereof arranged in telescoped relation and fixed together in a sealed manner to prevent electrical leakage.
Claim 4
Dependent Claim
15 words
A dosimeter as in claim 1 wherein said first tubular section is of plastic material.
Claim 5
Dependent Claim
49 words
A dosimeter as set forth in claim 1 in which said tubular housing further includes a third tubular section having optical means, said second and said third tubular sections defining end sections and made of metal with said first tubular section being fixed in position between said end sections.
Claim 6
Dependent Claim
38 words
A dosimeter as set forth in claim 4 in which said first tubular section and each of said end sections have associated portions arranged in telescoped relation and fixed together in a sealed manner to prevent electrical leakage.
Claim 7
Dependent Claim
71 words
A dosimeter as set forth in claim 4 in which each of said end sections has a reduced diameter inner portion of a given diameter, said first tubular section has a counterbore in its opposite end portions, each counterbore having an inside diameter corresponding to said given diameter enabling fitting of said first tubular section with each of its end portions telescoped over an inner portion of an associated end section.
Claim 8
Dependent Claim
39 words
A dosimeter as set forth in claim 4 in which each of said end sections has a reduced diameter inner portion provided with integral outwardly extending projections which enable said sections to be sealed together in an optimum manner.
Claim 9
Dependent Claim
78 words
A dosimeter for detecting radiation comprising, an ionization chamber and an outer tubular housing comprised of tubular sections defined by oppositely arranged end sections made of metal with one section being fixed in position between said end sections, said one section being arranged surrounding said ionization chamber and being made of a material having a total mass attenuation coefficient which is substantially constant over a desired energy range of from at least 30 Kev. to about 250 Kev.
Claim 10
Dependent Claim
78 words
A dosimeter for detecting radiation comprising, an ionization chamber and an outer tubular housing comprised of tubular sections defined by oppositely arranged end sections made of metal with one section being fixed in position between said end sections, said one section being arranged surrounding said ionization chamber and being made of a material having a total mass attenuation coefficient which is substantially constant over a desired energy range of from at least 30 Kev. to about 250 Kev.
Claim 11
Dependent Claim
15 words
A dosimeter as set forth in claim 8 in which said material comprises a polycarbonate.
Claim 12
Dependent Claim
36 words
A dosimeter as set forth in claim 8 in which said ionization chamber is formed in an electrically conductive member having a cylindrical outer surface which adjoins a corresponding cylindrical inside surface of said one section.
Claim 13
Independent Claim
87 words
A method of making a dosimeter comprising the method steps of providing an end section means made of easily fabricated material means having a charging electrode therein, forming one section of said housing of a material having a total mass attenuation coefficient which is substantially constant over a desired energy range with an ionization chamber therein, and fixing said one section in a sealed manner to said end section means in end-to-end relation to define said housing with said charging electrode in communication with said ionization chamber.
Claim 14
Independent Claim
87 words
A method of making a dosimeter comprising the method steps of providing an end section means made of easily fabricated material means having a charging electrode therein, forming one section of said housing of a material having a total mass attenuation coefficient which is substantially constant over a desired energy range with an ionization chamber therein, and fixing said one section in a sealed manner to said end section means in end-to-end relation to define said housing with said charging electrode in communication with said ionization chamber.
Claim 15
Dependent Claim
33 words
A method as set forth in claim 11 in which said material for said one section comprises a plastic material and said forming step comprises molding said plastic material using associated mold means.
Claim 16
Dependent Claim
37 words
A method as set forth in claim 11 in which said material comprises a plastic material and said forming and fixing steps are achieved simultaneously by molding said plastic material in position against said end section means.
Claim 17
Dependent Claim
24 words
A method as set forth in claim 12 in which said fixing step comprises adhesively fixing said one section to said end section means.
Claim 18
Dependent Claim
47 words
A method as set forth in claim 11 further comprising the step of providing another end section means having optical means, said fixing step comprises arranging said one section and each of said end sections with associated portions in telescoped relation and sealing the telescoped portions together.
Claim 19
Dependent Claim
36 words
A method as set forth in claim 11 in which said material of said one piece comprises a plastic material and said forming step comprises making said one section from a length of preconstructed tubular stock.
Claim 20
Independent Claim
134 words
A method of making a low-energy dosimeter comprising the method steps of, forming a pair of tubular end sections made of metal and adapted to define opposite end sections of a tubular housing for said dosimeter, providing one of said end sections with a charging electrode and the other of said end sections with optical means, forming a tubular central section for said housing of a material having a total mass attenuation coefficient which is substantially constant over a desired energy range with an ionization chamber, fixing said central section in a sealed manner between said end sections in end-to-end relation with said charging electrode in communication with said ionization chamber, whereby said dosimeter is capable of providing reliable precision performance over said desired energy range due to the positioning of said ionization chamber.
Claim 21
Independent Claim
134 words
A method of making a low-energy dosimeter comprising the method steps of, forming a pair of tubular end sections made of metal and adapted to define opposite end sections of a tubular housing for said dosimeter, providing one of said end sections with a charging electrode and the other of said end sections with optical means, forming a tubular central section for said housing of a material having a total mass attenuation coefficient which is substantially constant over a desired energy range with an ionization chamber, fixing said central section in a sealed manner between said end sections in end-to-end relation with said charging electrode in communication with said ionization chamber, whereby said dosimeter is capable of providing reliable precision performance over said desired energy range due to the positioning of said ionization chamber.
Claim 22
Dependent Claim
44 words
A method as set forth in claim 17 in which said forming step comprises molding said central section of a plastic material and said installing step comprises soldering each of the opposed end components of said dosimeter in position against an associated metal section.
Claim 23
Dependent Claim
37 words
A method as set forth in claim 18 in which said fixing step comprises arranging said central section and each of said metal end sections with associated portions in telescoped relation and sealing the telescoped portions together.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |