Patent US3843886A successfully refreshed from Google Patents.
US3843886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position sensitive radiation detector
Assignee: National Research Development Corp UK
•
Filing: 1973-05-17
•
Granted: 1974-10-22
•
Expires: 1993-05-17
Abstract
Abstract A position sensitive proportional converter for Soft X-rays is described comprising a circular resistive sheet having four symmetrically disposed electrodes. When an event produces a charge on the surface of the sheet, the signals generated at the electrodes by the charge are analysed so that the position and/or quantity of the charge can be calculated.
Inventors
- 👤 J Stumpel
- 👤 P Sanford
- 👤 C Rapley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:51
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/29; G01T1/2914; G01T1/2921; H; H01; H01J; H01J47/00; H01J47/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
A device for detecting ionising radiation cOmprising a homogeneous plate-like conductor, a plurality of electrodes connected only to the periphery of the conductor for detecting electrical energy induced by charges deposited on the surface of the conductor, amplifiers coupled to the electrodes to amplify the signals so obtained and means for analysing the signals from the amplifiers to derive information concerning the position of the charge deposited on the conductor.
Claim 2
Independent Claim
70 words
A device for detecting ionising radiation cOmprising a homogeneous plate-like conductor, a plurality of electrodes connected only to the periphery of the conductor for detecting electrical energy induced by charges deposited on the surface of the conductor, amplifiers coupled to the electrodes to amplify the signals so obtained and means for analysing the signals from the amplifiers to derive information concerning the position of the charge deposited on the conductor.
Claim 3
Dependent Claim
12 words
A device as claimed in claim 1, wherein the sheet is circular.
Claim 4
Dependent Claim
16 words
A device as claimed in claim 1 wherein the sheet is made of lead oxide glass.
Claim 5
Dependent Claim
33 words
A device as claimed in claim 1, and wherein said plurality of electrodes connected only to the periphery of the conductor comprise four electrodes disposed symmetrically around the sheet at the periphery thereof.
Claim 6
Dependent Claim
82 words
A device as claimed in claim 4, wherein each electrode is connected to individual amplifying means, each amplifying means in turn connected to a cross-over detector, a pair of time-to-amplitude converters, the outputs of the crossover detectors associated with two diammetrically opposed electrodes being connected to one time-to-amplitude converter, and the cross-over detectors associated with the other pair of electrodes being connected to the other time-to-amplitude converter, and a pair of pulse stretchers, connected respectively to the output of each time-to-amplitude converter.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |