US3689889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching matrix for relay couplers with threshold value switches
Assignee: Individual
•
Filing: 1969-02-07
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Granted: 1972-09-05
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Expires: 1989-02-07
Abstract
Abstract A switching matrix with threshold value switches connected between the junctions of row and column lines, the threshold value switches being responsive to the temporary application of a sufficiently high operating potential to the associated row and column lines to close or become conductive. Individual preresistance means are connected to the row and column lines which have a small value of resistance compared to that of the threshold value switches in blocked or open condition. Control potentials are applied over the threshold value switches in blocked condition to further threshold value switches. Each of the latter are connected to at least one of a row and column line not receiving the operating potential to decrease the effect of the operating potential thereon to an extent such that the further threshold value switches cannot close.
Inventors
- 👤 Hermann Feucht
- 👤 Ulrich Korber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:19
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0008; H04Q3/0012
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
205 words
A switching matrix having threshold value switches energized by an operating potential for completing connections across the junctions of row and column lines in said matrix, each said threshold value switch being changed from a non-conductive to a conductive condition by the application thereto of a potential having a predetermined minimum value over the row and column lines associated therewith, comprising: individual pre-resistance means 1W . . . mW; W2 . . . Wn connected to each of said row and column lines, said preresistance means having a resistance value that is small relative to the values of said threshold value switches in their non-conductive conditions, and means for applying control potentials to said row and column lines through said pre-resistance means, said control potential being of a value within the range of said operating potential, but lower than said predetermined minimum value, thereby reducing the effect of said operating potential on ones of said threshold value switches connected to row and column lines to which no operating potential is applied so that said operating potential cannot cause the ones of said threshold values switches connected to row and column lines to which said operating potential has not been applied to change a conducting state.
Claim 2
Dependent Claim
205 words
A switching matrix having threshold value switches energized by an operating potential for completing connections across the junctions of row and column lines in said matrix, each said threshold value switch being changed from a non-conductive to a conductive condition by the application thereto of a potential having a predetermined minimum value over the row and column lines associated therewith, comprising: individual pre-resistance means 1W . . . mW; W2 . . . Wn connected to each of said row and column lines, said preresistance means having a resistance value that is small relative to the values of said threshold value switches in their non-conductive conditions, and means for applying control potentials to said row and column lines through said pre-resistance means, said control potential being of a value within the range of said operating potential, but lower than said predetermined minimum value, thereby reducing the effect of said operating potential on ones of said threshold value switches connected to row and column lines to which no operating potential is applied so that said operating potential cannot cause the ones of said threshold values switches connected to row and column lines to which said operating potential has not been applied to change a conducting state.
Claim 3
Dependent Claim
53 words
A circuit arrangement as recited in claim 1, wherein the number of rows is substantially different from the number of columns, and said predetermined minimum potential Us of the threshold value switches X11, . . . is more than one-half and the control potential is equal to one-half of the operating potential U.
Claim 4
Dependent Claim
111 words
A circuit arrangement as recited in claim 1 wherein said predetermined minimum potential Us of the threshold value switches X11, . . . is more than one-third ( 1/3 U) of the operating potential U and less than the full operating potential U, and the control potential ( 2/3 U or 1/3 U) is applied over the pre-resistors 1W, . . . , mW; W1, W2, . . . , Wn to series connected row or column lines and is changed by two-thirds compared to the operating potential U, or ground applied to the row or column lines connected in series for the switching through of a threshold value switch X11.
Claim 5
Dependent Claim
20 words
A circuit arrangement as recited in claim 1 wherein the threshold value switches X11, . . . comprise glow lamps.
Claim 6
Dependent Claim
23 words
A circuit arrangement as recited in claim 1 wherein the threshold value switches X11, . . . comprise blocking-layer-free, symmetrical semi-conductor switching elements.
Claim 7
Dependent Claim
30 words
A circuit arrangement as recited in claim 5 wherein the operating potential applied to the switching matrix and the control potentials may selectively be of one or the other polarity.
Claim 8
Dependent Claim
26 words
A circuit arrangement as recited in claim 5 wherein the operating potential applied to the switching matrix may selectively be of one or the other polarity.
Claim 9
Dependent Claim
24 words
A circuit arrangement as recited in claim 6 wherein an individual switching element comprising a holding relay is controlled by each threshold value switch.
Claim 10
Dependent Claim
51 words
A circuit arrangement as recited in claim 1 further comprising: a controlled switching element R11 connected in series with each threshold value switch X11 between the junctions of associated row and column lines having a value of internal resistance that is small compared to the value of resistance of the pre-resistors.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |