US4616159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving circuit for pulsating radiation detector
Assignee: North American Manufacturing Co
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Filing: 1985-04-22
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Granted: 1986-10-07
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Expires: 2005-04-22
Abstract
Abstract There is provided an improvement in a pulsating radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency, means responsive to pulses of radiation at the frequency for creating a control signal related to the received radiation and a driving circuit for pulsating the radiation emitting means in the series circuit. The improvement comprises a modification of the driving circuit to produce voltage pulses in the series circuit at a time base width less than the reciprocal of the frequency (in seconds), with means for sensing current flow in the series circuit, means for limiting current flow in the series circuit and means for adjusting the pulse width continuously as an inverse function of the sensed circuit whereby short distinct pulses can be created for better discrimination and accuracy in the detector system.
Inventors
- 👤 Wen H. Ko
- 👤 Gong-Jong Yeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:11
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/01; H03K3/015; H03K17/00; H03K17/94; H03K17/941; H05; H05B; H05B41/00; H05B41/14; H05B41/30
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
225 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, said pulsing radiation detector further comprising: said driving circuit having means for creating voltage pulses in said series circuits, said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensed current; said radiation emitting means is a fluorescent light tube and said radiation pulses are light pulses; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in said series circuit and means for applying pulses of voltage across said primary winding; said primary winding divided into a first segment and a second segment and said pulse applying means includes means for applying voltage pulses alternately across said first and second segments; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 2
Dependent Claim
225 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, said pulsing radiation detector further comprising: said driving circuit having means for creating voltage pulses in said series circuits, said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensed current; said radiation emitting means is a fluorescent light tube and said radiation pulses are light pulses; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in said series circuit and means for applying pulses of voltage across said primary winding; said primary winding divided into a first segment and a second segment and said pulse applying means includes means for applying voltage pulses alternately across said first and second segments; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 3
Dependent Claim
194 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, said pulsing radiation detector further comprising: said driving circuit having means for creating voltage pulses in said series circuit, said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensed current; said radiation emitting means is a fluorescent light tube and said radiation pulses are light pulses; said pulse creating means including a transformer with a primary winding and closely coupled secondary winding in said series circuit and means for applying pulses of voltage across said primary winding; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 4
Dependent Claim
194 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, said pulsing radiation detector further comprising: said driving circuit having means for creating voltage pulses in said series circuit, said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensed current; said radiation emitting means is a fluorescent light tube and said radiation pulses are light pulses; said pulse creating means including a transformer with a primary winding and closely coupled secondary winding in said series circuit and means for applying pulses of voltage across said primary winding; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 5
Dependent Claim
179 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, said pulsing radiation detector further comprising: said driving circuit having means for creating voltage pulses in said series circuits, said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensed current; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in said series circuit and means for applying pulses of voltage across said primary winding; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 6
Dependent Claim
179 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, said pulsing radiation detector further comprising: said driving circuit having means for creating voltage pulses in said series circuits, said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensed current; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in said series circuit and means for applying pulses of voltage across said primary winding; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 7
Dependent Claim
175 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, said pulsing radiation detector further comprising: said driving circuit having means for creating voltage pulses in said series circuits, said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensing current; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in said series circuit and means for applying pulses of voltage across said primary winding; and wherein said pulse creating means further includes means for limiting the voltage of said pulses applied across said primary winding.
Claim 8
Dependent Claim
175 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, said pulsing radiation detector further comprising: said driving circuit having means for creating voltage pulses in said series circuits, said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensing current; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in said series circuit and means for applying pulses of voltage across said primary winding; and wherein said pulse creating means further includes means for limiting the voltage of said pulses applied across said primary winding.
Claim 9
Dependent Claim
161 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, the improvement comprising: said driving circuit having means for creating voltage pulses in said series circuits. said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensed current; and wherein said driving circuit is alternately actuated to produce said pulse and then deactuated to create no pulse, means for causing said alternation at a given rate less than said frequency whereby said alternation creates a pulsating envelope for said pulses.
Claim 10
Dependent Claim
161 words
In a pulsing radiation detector system comprising means in a series circuit for emitting radiation in pulses of a selected, adjusted frequency (f), means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation, and a driving circuit for pulsing said radiation emitting means in said series circuit, the improvement comprising: said driving circuit having means for creating voltage pulses in said series circuits. said pulses having a time base width (t) less than 1/f in seconds, means for sensing current flow in said series circuit, means for limiting the current in said series circuit and means for adjusting said pulse width (t) as an inverse function of said sensed current; and wherein said driving circuit is alternately actuated to produce said pulse and then deactuated to create no pulse, means for causing said alternation at a given rate less than said frequency whereby said alternation creates a pulsating envelope for said pulses.
Claim 11
Dependent Claim
158 words
In a circuit for applying pulses of a selected, adjusted frequency across a voltage discharge device, said circuit including means for creating said voltage pulses at said frequency and means for limiting the current through said device after it discharges, the improvement comprising: means sensing current flow through said device and means for adjusting the time base width of said pulses as an inverse function of said sensed current; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in a series circuit with said voltage discharge device and means for applying pulses across said primary winding; said primary winding divided into a first segment and a second segment and said pulse applying means including means applying voltage pulses alternately across said first and second segments; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 12
Dependent Claim
158 words
In a circuit for applying pulses of a selected, adjusted frequency across a voltage discharge device, said circuit including means for creating said voltage pulses at said frequency and means for limiting the current through said device after it discharges, the improvement comprising: means sensing current flow through said device and means for adjusting the time base width of said pulses as an inverse function of said sensed current; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in a series circuit with said voltage discharge device and means for applying pulses across said primary winding; said primary winding divided into a first segment and a second segment and said pulse applying means including means applying voltage pulses alternately across said first and second segments; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 13
Dependent Claim
129 words
In a circuit for applying pulses of a selected, adjusted frequency across a voltage discharge device, said circuit including means for creating said voltage pulses at said frequency and means for limiting the current through said device after it discharges, the improvement comprising: means sensing current flow through said device and means for adjusting the time base width of said pulses as an inverse function of said sensed current; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in a series circuit with said voltage discharge device and means for applying pulses across said primary winding; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 14
Dependent Claim
129 words
In a circuit for applying pulses of a selected, adjusted frequency across a voltage discharge device, said circuit including means for creating said voltage pulses at said frequency and means for limiting the current through said device after it discharges, the improvement comprising: means sensing current flow through said device and means for adjusting the time base width of said pulses as an inverse function of said sensed current; said pulse creating means including a transformer with a primary winding and a closely coupled secondary winding in a series circuit with said voltage discharge device and means for applying pulses across said primary winding; and wherein said current limiting means is a winding in said series circuit and loosely coupled with both said primary winding and said secondary winding.
Claim 15
Dependent Claim
119 words
In a transformer for applying pulses of a selected, controlled frequency across a voltage discharge device in a series circuit and of the type with a characteristic curve which has a negative resistance after discharge of said device at a firing point, said transformer having a primary winding and at a firing point, said transformer having a primary winding and second winding closely coupled to said primary winding by a magnetic core, said secondary winding being in said series circuit, the improvement comprising: a current limiter in said series current comprised of an auxiliary winding in a series with said secondary winding and means for providing a loose coupling of said auxiliary winding with said primary and secondary windings
Claim 16
Dependent Claim
119 words
In a transformer for applying pulses of a selected, controlled frequency across a voltage discharge device in a series circuit and of the type with a characteristic curve which has a negative resistance after discharge of said device at a firing point, said transformer having a primary winding and at a firing point, said transformer having a primary winding and second winding closely coupled to said primary winding by a magnetic core, said secondary winding being in said series circuit, the improvement comprising: a current limiter in said series current comprised of an auxiliary winding in a series with said secondary winding and means for providing a loose coupling of said auxiliary winding with said primary and secondary windings
Claim 17
Dependent Claim
36 words
The improvement as defined in claim 8 wherein said loose coupling means includes means for winding said auxiliary winding about a selected portion of said core and means for reducing the coupling at said selected portion.
Claim 18
Dependent Claim
35 words
The improvement as defined in claim 9 wherein said coupling reducing means is a cut out section of said core at said selected portion whereby the effective permeability within said auxiliary winding is substantially decreased.
Claim 19
Dependent Claim
118 words
In a pulsating radiation detector system comprising means for emitting radiation in pulses of a selected, adjusted frequency, means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation and a driving circuit for pulsing said radiation emitting means, the improvement comprising: said driving circuit including means for successively driving said radiation emitting means at said frequency at selected intervals at a rate less than said frequency whereby said intervals create an envelope for said pulses of radiation and said responsive means includes a first filter means for passing said selected frequency, a smoothing circuit to produce said envelope as pulses and a second filter for passing said produced pulses.
Claim 20
Dependent Claim
118 words
In a pulsating radiation detector system comprising means for emitting radiation in pulses of a selected, adjusted frequency, means responsive to pulses of radiation at said frequency for creating a control signal related to the received radiation and a driving circuit for pulsing said radiation emitting means, the improvement comprising: said driving circuit including means for successively driving said radiation emitting means at said frequency at selected intervals at a rate less than said frequency whereby said intervals create an envelope for said pulses of radiation and said responsive means includes a first filter means for passing said selected frequency, a smoothing circuit to produce said envelope as pulses and a second filter for passing said produced pulses.
References Cited (Backward Citations)
US2482894A
Cited
US2802143A
Cited
US3648106A
Cited
US3611021A
Cited
US3739177A
Cited
US3987339A
Cited
US4157477A
Cited
US4170747A
Cited
US4477748A
Cited
US4464606A
Cited
US4412154A
Cited
US4471269A
Cited
US4453109A
Cited
US4442382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |