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US3697954A
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Matrix with inductive elements
Assignee: Svenska Dataregister AB
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Filing: 1970-11-09
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Granted: 1972-10-10
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Expires: 1990-11-09
Abstract
Abstract A matrix of inductive elements selectively actuated by drive circuitry utilizing thyristers. The drive circuitry is a chain of thyristers having the anode of each thyrister diode coupled to the gate circuit of the succeeding thyrister for insuring proper thyrister sequencing.
Inventors
- 👤 Sven-Erik Maxe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:28
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0008; H04Q3/0012; G; G06; G06C; G06C7/00; G06C7/02; H03; H03K; H03K23/00; H03K23/84; H03K5/00; H03K5/15; H03K5/15013; H03K5/1506; H03K5/15093
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
305 words
Matrix arrangement with inductive elements, each element being arranged between one column conductor and one row conductor, the arrangement having controlled rectifiers, working as current switches cooperating with each column conductor and row conductor, characterized in that the supply voltage, being positive pulses, is applied to each circuit formed by a controlled rectifier cooperating with a row conductor, an inductive element and a controlled rectifier cooperating with a column conductor, and that the controlled rectifiers cooperating with the column conductors form a chain, in which chain these controlled rectifiers arE sequentially switched, each anode of the controlled rectifiers in the chain being connected, via a first rectifier and a capacitive element with the control electrode of the next rectifier in the chain, the connection point between the first rectifier and the capacitive element being supplied with trigger pulses via a second rectifier, the mentioned connection point being connected with a source for charging the capacitive element to a potential exceeding the peak value of the trigger pulse and that between the anode of each controlled rectifier in the chain and each inductive element belonging hereto a third rectifier is connected, this last mentioned rectifier having the same direction of conduction as the controlled rectifier in the chain, the arrangement being so designed that a controlled rectifier in the chain starts conducting when the capacitive element of the control circuit has been discharged, this discharge has taken place when the preceding controlled rectifier has been conducting, the capacitive element has discharged via the first rectifier and the preceding controlled rectifier, the supply voltage being positive, simultaneously as a trigger pulse appears at the connection point between the first rectifier and the capacitive element, the controlled rectifier (34) in the chain being set to not conducting state when the supply voltage, after the positive pulse, is zero.
Claim 2
Dependent Claim
305 words
Matrix arrangement with inductive elements, each element being arranged between one column conductor and one row conductor, the arrangement having controlled rectifiers, working as current switches cooperating with each column conductor and row conductor, characterized in that the supply voltage, being positive pulses, is applied to each circuit formed by a controlled rectifier cooperating with a row conductor, an inductive element and a controlled rectifier cooperating with a column conductor, and that the controlled rectifiers cooperating with the column conductors form a chain, in which chain these controlled rectifiers arE sequentially switched, each anode of the controlled rectifiers in the chain being connected, via a first rectifier and a capacitive element with the control electrode of the next rectifier in the chain, the connection point between the first rectifier and the capacitive element being supplied with trigger pulses via a second rectifier, the mentioned connection point being connected with a source for charging the capacitive element to a potential exceeding the peak value of the trigger pulse and that between the anode of each controlled rectifier in the chain and each inductive element belonging hereto a third rectifier is connected, this last mentioned rectifier having the same direction of conduction as the controlled rectifier in the chain, the arrangement being so designed that a controlled rectifier in the chain starts conducting when the capacitive element of the control circuit has been discharged, this discharge has taken place when the preceding controlled rectifier has been conducting, the capacitive element has discharged via the first rectifier and the preceding controlled rectifier, the supply voltage being positive, simultaneously as a trigger pulse appears at the connection point between the first rectifier and the capacitive element, the controlled rectifier (34) in the chain being set to not conducting state when the supply voltage, after the positive pulse, is zero.
Claim 3
Dependent Claim
68 words
Matrix arrangement as recited in claim 1, characterized in that the anode of the third rectifier being connected to the inductive element, the cathode of the rectifier being connected to a point, which point by a resistive element is connected to the supply voltage and via the anode and cathode of a fourth rectifier is connected to the anode of the controlled rectifier cooperating with a column conductor.
Claim 4
Dependent Claim
41 words
Matrix arrangement as recited claim 2, characterized in that the anode of a fifth rectifier being connected to the connection point between the third rectifier and the fourth rectifier, the cathode of the fifth rectifier being connected to the supply voltage.
Claim 5
Dependent Claim
40 words
Matrix arrangement as recited in claim 1, characterized in that the capacitive element in the control circuit of each controlled rectifier cooperating with each column conductor, is connected to the supply voltage via a sixth rectifier and a resistive element.
Claim 6
Dependent Claim
67 words
Matrix arrangement according to any one of the preceding claims, characterized in that an additional controlled rectifier, for preparing the first controlled rectifier in the chain to be activated by a trigger pulse, is so arranged that when it is activated by a start pulse it forms a discharge path for the capacitive element situated in the control circuit of the first controlled rectifier in the chain.
Claim 7
Dependent Claim
17 words
Matrix arrangement according to any one of the preceding claims, characterized by the controlled rectifiers being thyristors.
References Cited (Backward Citations)
US3375497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |