Patent US3775614A successfully refreshed from Google Patents.
US3775614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoluminescent radiation detector
Assignee: VIC ACQUISITION Corp
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Filing: 1970-12-14
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Granted: 1973-11-27
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Expires: 1990-12-14
Abstract
Abstract Radiation detector having a spring clip holding hot-pressed thermoluminescent chips in contact with a heater element welded to electrical leads passing through a glass envelope enclosing the same.
Inventors
- 👤 R Winn
- 👤 J Ennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/10; G01T1/11
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
103 words
A radiation detector comprising: a heater wire; first and second chips of thermoluminescent material disposed on opposite sides of the heater wire and in surface contact with the exterior surface of the heater wire; a spring disposed around the chips of thermoluminescent material to hold them in surface-to-surface contact with the exterior surface of the heater wire and act as heat sink means to more evenly distribute heat along the length of the chips; a transparent envelope enclosing the heater wire, chips and spring; and electrical leads connected to the ends of the heater wire providing mechanical rigidity and passing through the envelope.
Claim 2
Dependent Claim
103 words
A radiation detector comprising: a heater wire; first and second chips of thermoluminescent material disposed on opposite sides of the heater wire and in surface contact with the exterior surface of the heater wire; a spring disposed around the chips of thermoluminescent material to hold them in surface-to-surface contact with the exterior surface of the heater wire and act as heat sink means to more evenly distribute heat along the length of the chips; a transparent envelope enclosing the heater wire, chips and spring; and electrical leads connected to the ends of the heater wire providing mechanical rigidity and passing through the envelope.
Claim 3
Dependent Claim
20 words
A radiation detector as in claim 1, in which the envelope is evacuated to provide a vacuum around the chips.
Claim 4
Dependent Claim
20 words
A radiation detector as in claim 1, in which the envelope also encloses a gaseous environment of high thermal conductivity.
Claim 5
Dependent Claim
18 words
A radiation detector as in claim 1, in which the envelope encloses a gaseous environment of carbon dioxide.
Claim 6
Dependent Claim
17 words
A radiation detector as in claim 1 in which the envelope encloses a gaseous environment of air.
Claim 7
Dependent Claim
28 words
A radiation detector as in claim 1 in which the chips are hot-pressed thermoluminescent material selected from fluorides of the group consisting of Li6, Li7 and natural lithium.
Claim 8
Dependent Claim
18 words
A radiation detector as in claim 1 in which the chips are made of hot-pressed manganese-activated calcium fluoride.
Claim 9
Dependent Claim
17 words
A radiation detector as in claim 1 in which the heater wire has a circular cross section.
Claim 10
Dependent Claim
17 words
A radiation detecor as in claim 8 in which the chips have semicircular grooves cut in them.
Claim 11
Dependent Claim
17 words
A radiation detector as in claim 1 in which the heater wire is a ribbon heater wire.
Claim 12
Dependent Claim
27 words
A radiation detector as in claim 1 wherein the heater wire is stretched taut between the electrical leads to prevent it from wrinkling And buckling during readout.
Claim 13
Dependent Claim
47 words
A radiation detector as in claim 1 including first and second end caps sealed to opposite ends of the detector, and wherein said electrical leads comprise a first lead which connects to said first end cap and a second lead which connects to said second end cap.
Claim 14
Dependent Claim
22 words
A radiation detector as in claim 1 wherein said electrical leads provide further heat sinks at the ends of the heater wire.
Claim 15
Dependent Claim
21 words
The radiation detector of claim 1 wherein said spring is located at approximately the midpoint of the length of the chips.
Claim 16
Dependent Claim
24 words
The radiation detector of claim 18 wherein the heater wire is stretched taut between the electrical leads to prevent it from wrinkling and buckling.
Claim 17
Dependent Claim
46 words
The radiation detector of claim 1 including first and second end caps sealed to opposite ends of the detector, and wherein said electrical leads comprise a first lead which connects to said first end cap and a second lead which connects to said second end cap.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |