US3784860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvements in and mountings for radiation detecting devices
Assignee: Tyco International Ltd
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Filing: 1971-09-29
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Granted: 1974-01-08
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Expires: 1991-09-29
Abstract
Abstract Improved gas discharge radiation detecting devices have long life spans under severe environmental conditions and under high vibration. A first, tubular electrode surrounds a second, elongated wire electrode with a hermetically sealed gas ionization chamber therebetween. A pair of electrode mounting means mount and tension the wire electrode through friction joints to provide sufficient tension to prevent electrical failure under severe vibration conditions. It has been found that electrical failure of such devices can be caused by vibration conditions which damage a protective surface oxide of the wire electrode and that proper mounting can eliminate such damage thereby greatly prolonging useful life.
Inventors
- 👤 F Cocks
- 👤 H Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:24
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/08
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
73 words
A radiation detecting device comprising, a first tubular electrode, a second elongated electrode spaced from and within said first tubular electrode, insulating means defining in part a hermetically sealed gas ionization chamber between said first and second electrode, a pair of second electrode mounting means for mounting and tensioning said second electrode, said mounting means being mechanically joined to said second electrode by friction joints at axially spaced portions of said second electrode.
Claim 2
Dependent Claim
73 words
A radiation detecting device comprising, a first tubular electrode, a second elongated electrode spaced from and within said first tubular electrode, insulating means defining in part a hermetically sealed gas ionization chamber between said first and second electrode, a pair of second electrode mounting means for mounting and tensioning said second electrode, said mounting means being mechanically joined to said second electrode by friction joints at axially spaced portions of said second electrode.
Claim 3
Dependent Claim
60 words
A radiation detecting device in accordance with claim 1 wherein said second electrode is tensioned to at least 60,000 p.s.i. and no more than 67% of its yield point with said joints holding said electrode so that said electrode slides with respect to said joints under tension loads above a predetermined value and below the yield strength of the electrode.
Claim 4
Dependent Claim
27 words
A radiation detecting device in accordance with claim 2 wherein said first electrode is a cylinder and said second electrode is a coaxially extending uniform diameter wire.
Claim 5
Dependent Claim
28 words
A radiation detecting device in accordance with claim 3 wherein said first and second electrodes are formed of stainless steel and said second electrode has an oxidized surface.
Claim 6
Dependent Claim
24 words
A radiation detecting device in accordance with claim 4 wherein said wire is reduced in diameter at said joints by from 1 to 5%.
Claim 7
Dependent Claim
27 words
A radiation detecting device in accordance with claim 5 wherEin said joints each have an axial length of at least three times the diameter of said wire.
Claim 8
Dependent Claim
23 words
A radiation detecting device in accordance with claim 6 wherein said gas ionization chamber contains a gas mixture comprising a halogen quenching gas.
Claim 9
Dependent Claim
29 words
A radiation detecting device in accordance with claim 7 wherein said second electrode is formed of 17-7 PH stainless steel having a diameter of from 0.009 to 0.040 inch.
Claim 10
Dependent Claim
19 words
A radiation detecting device in accordance with claim 8 wherein said first electrode is formed of 446 stainless steel.
Claim 11
Dependent Claim
20 words
A radiation detecting device in accordance with claim 9 wherein said second electrode carries an oxidized surface coating of chromium.
Claim 12
Dependent Claim
43 words
A radiation detecting device in accordance with claim 2 wherein said second electrode is an iron based alloy and carries a coating of a material which forms an oxide more resistant to chemical reaction with halogen than is the oxide of said alloy.
Claim 13
Dependent Claim
14 words
A radiation detecting device in accordance with claim 11 wherein said coating is chromium.
Claim 14
Dependent Claim
21 words
A radiation detecting device in accordance with claim 12 wherein said coating has a thickness of from 100 to 2,000 Angstroms.
Claim 15
Dependent Claim
16 words
A radiation detecting device in accordance with claim 13 wherein said joints are each swaged joints.
Claim 16
Dependent Claim
59 words
The improvement of claim 14 wherein, said elongated electrode is a high strength stainless steel wire having a uniform diameter and said joints are swaged to reduce the diameter of the wire by from 1 to 5% at said joints with each of said joints having an axial length of at least 3 times the length of said diameter.
Claim 17
Dependent Claim
90 words
In a radiation detecting device having a first tubular electrode and a second elongated electrode coaxially extending within said tubular electrode, the improvement comprising, end cap means defining in part a hermetically sealed chamber between said tubular electrode and said elongated electrode, and means for maintaining said elongated electrode in tension within said chamber, said means comprising a plurality of friction joints constructed and arranged to allow sliding of said elongated electrode with respect to said joints at a tension load less than the yield strength of said elongated electrode.
Claim 18
Dependent Claim
90 words
In a radiation detecting device having a first tubular electrode and a second elongated electrode coaxially extending within said tubular electrode, the improvement comprising, end cap means defining in part a hermetically sealed chamber between said tubular electrode and said elongated electrode, and means for maintaining said elongated electrode in tension within said chamber, said means comprising a plurality of friction joints constructed and arranged to allow sliding of said elongated electrode with respect to said joints at a tension load less than the yield strength of said elongated electrode.
Claim 19
Dependent Claim
78 words
In a radiation detecting device for detecting charged particles and having a halogen gas containing hermetically sealed chamber, a first tubular electrode and a second elongated electrode spaced from and coaxially extending therein, the improvement comprising, said elongated electrode being formed of a high mechanical strength iron base alloy carrying a thin coating of material having high resistance to chemical attack by halogens, said coating being formed of a high chromium containing material having an oxidized outer surface.
Claim 20
Dependent Claim
78 words
In a radiation detecting device for detecting charged particles and having a halogen gas containing hermetically sealed chamber, a first tubular electrode and a second elongated electrode spaced from and coaxially extending therein, the improvement comprising, said elongated electrode being formed of a high mechanical strength iron base alloy carrying a thin coating of material having high resistance to chemical attack by halogens, said coating being formed of a high chromium containing material having an oxidized outer surface.
Claim 21
Dependent Claim
28 words
The improvement of claim 17 wherein said iron based alloy is a stainless steel having an oxide layer over which lies said coating of a chromium containing material.
Claim 22
Dependent Claim
29 words
The improvement of claim 18 wherein said material consists essentially of chromium having an oxidized outer surface and a thickness within the range of from 100 to 2,000 Angstroms.
Claim 23
Dependent Claim
118 words
In a radiation detecting device having a first tubular electrode and a second elongated electrode coaxially extending within said tubular electrode with a hermetically sealed chamber lying in part between said first and second electrodes, the improvement comprising, said elongated electrode being formed of a high mechanical strength iron base alloy carrying a thin coating of material having high resistance to chemical attack by halogens, means comprising a sleeve surrounding a portion of said elongated electrode for maintaining said elongated electrode in tension, said sleeve being frictionally joined to said elongated electrode and arranged to allow sliding of said elongated electrode with respect to said sleeve at tension loads less than the yield strength of said elongatEd electrode.
Claim 24
Dependent Claim
118 words
In a radiation detecting device having a first tubular electrode and a second elongated electrode coaxially extending within said tubular electrode with a hermetically sealed chamber lying in part between said first and second electrodes, the improvement comprising, said elongated electrode being formed of a high mechanical strength iron base alloy carrying a thin coating of material having high resistance to chemical attack by halogens, means comprising a sleeve surrounding a portion of said elongated electrode for maintaining said elongated electrode in tension, said sleeve being frictionally joined to said elongated electrode and arranged to allow sliding of said elongated electrode with respect to said sleeve at tension loads less than the yield strength of said elongatEd electrode.
Claim 25
Dependent Claim
62 words
The improvement of claim 20 wherein, said elongated electrode is a high strength stainless steel wire having a uniform diameter and said joint is swaged to reduce the sleeve and reduce the diameter of the wire by from 1 to 5% at said joint with said joint having an axial swaged length of at least 3 times the length of said diameter.
References Cited (Backward Citations)
US2552723A
Cited
US2974247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |