Patent US3825758A successfully refreshed from Google Patents.
US3825758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scintillation crystal
Assignee: Individual
•
Filing: 1973-04-09
•
Granted: 1974-07-23
•
Expires: 1993-04-09
Abstract
Abstract A plurality of elongated scintillation crystals combined in a unit. The scintillation crystals may be either parallel bars or concentric tubular members. In either event separators such as aluminum foil may be used to prohibit signals from crossing between scintillation crystals. Magnesium oxide holds the individual scintillation crystals together as a unit and acts as a highly reflective material to enhance the transmission of the signals.
Inventors
- 👤 F Miraldi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:22
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/161; G01T1/164; G01T1/1641; G01T1/1642; G01T1/29; G01T1/2914; G01T1/2978
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A position detecting scintillation crystal unit for use in a radiation sensitive device having a source of radiaTion comprising: a plurality of elongated scintillation crystals combined in a unit, each elongated scintillation crystal having a generally rectangular cross-section with one side being smaller than the other and two ends through which radiation may be transmitted, the surface of the crystal unit having a high reflectivity and the smaller side of each elongated scintillation crystal facing the source of radiation, so that radiation may be received through the smaller side of each scintillation crystal causing scintillations which result in light radiation which is attenuated as it passes through each crystal along its length and is detectable at the two ends of each crystal in order that the positions of the scintillations occurring within the unit may be determined by measurements taken at the two ends of each crystal.
Claim 2
Dependent Claim
147 words
A position detecting scintillation crystal unit for use in a radiation sensitive device having a source of radiaTion comprising: a plurality of elongated scintillation crystals combined in a unit, each elongated scintillation crystal having a generally rectangular cross-section with one side being smaller than the other and two ends through which radiation may be transmitted, the surface of the crystal unit having a high reflectivity and the smaller side of each elongated scintillation crystal facing the source of radiation, so that radiation may be received through the smaller side of each scintillation crystal causing scintillations which result in light radiation which is attenuated as it passes through each crystal along its length and is detectable at the two ends of each crystal in order that the positions of the scintillations occurring within the unit may be determined by measurements taken at the two ends of each crystal.
Claim 3
Dependent Claim
23 words
The scintillation crystal of claim 1 wherein the members are substantially parallel bars having a generally uniform cross-section and spaced from each other.
Claim 4
Dependent Claim
18 words
The scintillation crystal of claim 2 wherein the sides of the bars are in contact with one another.
Claim 5
Dependent Claim
27 words
The scintillation crystal of claim 2 wherein the cross-sections are uniform and the bars are spaced from each other and have a reflective member between said bars.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |