Patent US3895232A successfully refreshed from Google Patents.
US3895232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray contrast detection system
Assignee: Westinghouse Electric Corp
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Filing: 1973-12-13
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Granted: 1975-07-15
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Expires: 1993-12-13
Abstract
Abstract A radiation detection device including a scintillation crystal in the form of a rod having photomultiplier devices affixed to either end which monitors the X-ray transmission characteristics of an object. Associated circuitry responds to the output signals developed by the photomultiplier tubes to map the transmission characteristics of the object. The use of a single rod-like scintillation crystal in combination with a pair of photomultiplier devices replaces the array of discrete simulator scintillation crystals typically employed to monitor objects for radiation emitting materials.
Inventors
- 👤 Robert J Schneeberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:32
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/083; G01V; G01V5/00; G01V5/20; G01V5/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
177 words
A baggage and parcel inspection apparatus comprising, an elongated scintillation crystal adapted to respond to radiation energy emanating from baggage or parcels exposed to a source of radiation, the length of said scintillation crystal being sufficient to view the vertical dimension of said baggage or parcels, a first photoresponsive device having a viewing surface optically coupled to an end surface of said elongated scintillation crystal and a second photoresponsive device having a viewing surface optically coupled to the opposite end surface of said elongated scintillation crystal, said viewing surfaces being substantially perpendicular to the longitudinal axes of said elongated scintillation crystal, said first and second photoresponsive devices producing output signals in response to radiation impinging on said elongated scintillation crystal, a radiation source spaced apart from said elongated scintillation crystal to expose baggage and parcels positioned therebetween to radiation energy, and circuit means connected to said first and second photoresponsive devices to monitor the signals developed by said photoresponsive devices in response to radiation transmitted by said baggage and parcels and impinging on said elongated scintillation crystal.
Claim 2
Dependent Claim
177 words
A baggage and parcel inspection apparatus comprising, an elongated scintillation crystal adapted to respond to radiation energy emanating from baggage or parcels exposed to a source of radiation, the length of said scintillation crystal being sufficient to view the vertical dimension of said baggage or parcels, a first photoresponsive device having a viewing surface optically coupled to an end surface of said elongated scintillation crystal and a second photoresponsive device having a viewing surface optically coupled to the opposite end surface of said elongated scintillation crystal, said viewing surfaces being substantially perpendicular to the longitudinal axes of said elongated scintillation crystal, said first and second photoresponsive devices producing output signals in response to radiation impinging on said elongated scintillation crystal, a radiation source spaced apart from said elongated scintillation crystal to expose baggage and parcels positioned therebetween to radiation energy, and circuit means connected to said first and second photoresponsive devices to monitor the signals developed by said photoresponsive devices in response to radiation transmitted by said baggage and parcels and impinging on said elongated scintillation crystal.
Claim 3
Dependent Claim
67 words
Radiation responsive apparatus as claimed in claim 1 further including circuit means operatively connected to said first and second photoresponsive devices for analyzing the output signals from said photosensitive devices to identify the location of impinging radiation on said elongated scintillation crystal, scintillations occurring at the midpoint of the elongated scintillation crystal producing output signals from said first and second photosensitive devices of essentially the same magnitude.
Claim 4
Dependent Claim
46 words
Radiation responsive apparatus as claimed in claim 1 further including circuit means for analyzing the output signals of said first and second photosensitive devices to determine if the radiation emanating from the object and impinging on said scintillation crystal is indicative of predetermined radiation transmission characteristic.
References Cited (Backward Citations)
US2879398A
Cited
US3011057A
Cited
US3327116A
Cited
US3723735A
Cited
US3825758A
Cited
US3808444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |