US3657540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear radiation monitoring device wherein a detector, a remote source and a measuring device are connected by a single cable
Assignee: International Standard Electric Corp
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Filing: 1969-10-03
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Granted: 1972-04-18
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Expires: 1989-10-03
Abstract
Abstract A nuclear radiation monitoring device wherein a detector and a remote source and measuring device are coupled by a single coaxial cable via a resistor. The detector includes a GeigerMuller counter tube, a low-to-high D.C. voltage converter, a pulse shaper and a monostable pulse repeater. The remote source supplies a low D.C. voltage which is converted to a high D.C. voltage for use by the detector. Signal pulses from the detector reach the remote measuring device substantially without alteration due to the aforementioned resistor which is chosen to have an impedance equal to the characteristic impedance of the coaxial cable.
Inventors
- 👤 Jean-Paul Maillot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:23
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
168 words
A nuclear radiation monitoring device comprising: detecting means having a conductive housing; a source of power; a coaxial cable coupling said detecting means to said source, one lead of said cable providing a signal path and the other lead of said cable being connected to said housing and to ground; measuring means coupled to said power source and to said coaxial cable; and a resistor having a value substantially equal to the characteristic impedance of said coaxial cable, said resistor connecting said source to said one lead, the junction of said resistor and said one lead being connected to said measuring means; wherein said radiation detecting means comprises: a radiation particle detector; a low-to-high D.C. voltage converter coupled to said particle detector and providing a regulated supply therefor; amplifying means connected to said particle detector for amplifying the output signal of said detector; and a switch connected between said one lead of the coaxial cable and ground, said switch being controlled by the signal from said amplifying means.
Claim 2
Dependent Claim
168 words
A nuclear radiation monitoring device comprising: detecting means having a conductive housing; a source of power; a coaxial cable coupling said detecting means to said source, one lead of said cable providing a signal path and the other lead of said cable being connected to said housing and to ground; measuring means coupled to said power source and to said coaxial cable; and a resistor having a value substantially equal to the characteristic impedance of said coaxial cable, said resistor connecting said source to said one lead, the junction of said resistor and said one lead being connected to said measuring means; wherein said radiation detecting means comprises: a radiation particle detector; a low-to-high D.C. voltage converter coupled to said particle detector and providing a regulated supply therefor; amplifying means connected to said particle detector for amplifying the output signal of said detector; and a switch connected between said one lead of the coaxial cable and ground, said switch being controlled by the signal from said amplifying means.
Claim 3
Dependent Claim
26 words
A nuclear radiation monitoring device, according to claim 1, wherein the input circuit for said low-to-high D.C. voltage converter is coupled to ground via a capacitor.
Claim 4
Dependent Claim
50 words
A nuclear radiation monitoring device, according to claim 1, wherein said switch comprises a transistor, so coupled between said amplifying means, said housing and said one lead of the coaxial cable, that said transistor conducts when it receives a signal from said amplifying means thereby grounding said one cable lead.
Claim 5
Dependent Claim
55 words
A nuclear radiation monitoring device, according to claim 3, further including pulse shaping means connected between said amplifying means and said transistor comprising a monostable multivibrator including two complementary transistors which are inhibited when no signal is transmitted from said amplifying means and which both conduct when such signal is provided by said amplifying means.
References Cited (Backward Citations)
US2903594A
Cited
US2909663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |