US3683117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selector network with scanning- and establishing function
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1970-09-24
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Granted: 1972-08-08
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Expires: 1990-09-24
Abstract
Abstract There is disclosed a selector network working according to the so-called end marking principle and using selector matrices of crossing point type wherein each crossing point is provided with a switching arrangement for performing scanning-, establishingand reidentifying functions between an initial point side and an end point side. If the holding wire of the end point side is idle, upon an establishing signal from the initial point, supplied during said scanning- and establishing function on the control wire, a first bistable logic circuit is switched and the establishing signal is transmitted to the control wire on the end point side. One path is found to the marked end point. If the first bistable logic circuit is in switched state which remains independently of the condition of the holding wire, upon a busy marking signal supplied at the end point on the holding wire, a second bistable logic circuit is switched and the busy marking signal is transmitted to the holding wire at the initial point side and speech-and re-identification gates are activated. The second bistable logic circuit remains in its switched position independently of the resetting of the first bistable logic circuit and the activated gates connect the speech wires for the two speech directions and the control wires for a reidentifying signal from the end point to the initial point.
Inventors
- 👤 Bengt Gunnar Magnusson
- 👤 Theodor Gosta Neovius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:47
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0008; H04Q3/0012
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
495 words
In a selector network a switching arrangement for a crossing point between a first group of wires having first ends adapted to be connected to an initial point and a second group of wires having first ends adapted to be connected to an end point in a connecting network, each group comprising a holding wire adapted to receive a first or a second voltage potential for indicating whether the respective group is busy or idle, respectively, a first speech wire adapted to carry speech signals supplied at the initial point, a second speech wire adapted to carry speech signals supplied at the end point and a control wire to which, at the initial point side, said first voltage potential is supplied when a connection is to be established between wires of the same type in the respective groups and to which control wire, at the end point side, said first voltage potential is supplied wHen an established connection is to be reidentified, said switching arrangement comprising first and second bistable logic circuits, each of said bistable logic circuits having first and second inputs and an output means, first and second means for connecting the first and second inputs, respectively, of said first bistable logic circuit to the holding wire of said second group and the control wire of said first group, respectively, one of said first and second means being a signal inverting means, third means for connecting the output means of said first bistable logic circuit to the control wire of said second group, fourth and fifth means for connecting the first and second inputs, respectively, of said second bistable logic circuit to the output means of said first bistable logic circuit and to the holding wire of said second group, respectively, sixth means for connecting the output means of said second bistable logic circuit to the holding wire of said first group, first and second speech gates, each of said speech gates having first and second inputs and an output, seventh and eighth means for connecting the outputs of said first and second speech gates, respectively, to the first speech wire of said second group and the second speech wire of said first group, respectively, ninth and 10th means for connecting the first inputs of said first and second speech gates, respectively, to the first speech wire of said first group and the second speech wire of said second group, respectively, 11th means for connecting the output means of said second bistable logic circuit to the second input of each of said speech gates, a reidentification gate having an output connected to the control wire of said first group and first, second and third inputs, 12th and 13th means for connecting the output means of said first and second bistable logic circuits, respectively, to the first and second inputs of said reidentification gate, and fourteenth means for connecting the control wire of said second group to the third input of said reidentification gate.
Claim 2
Dependent Claim
495 words
In a selector network a switching arrangement for a crossing point between a first group of wires having first ends adapted to be connected to an initial point and a second group of wires having first ends adapted to be connected to an end point in a connecting network, each group comprising a holding wire adapted to receive a first or a second voltage potential for indicating whether the respective group is busy or idle, respectively, a first speech wire adapted to carry speech signals supplied at the initial point, a second speech wire adapted to carry speech signals supplied at the end point and a control wire to which, at the initial point side, said first voltage potential is supplied when a connection is to be established between wires of the same type in the respective groups and to which control wire, at the end point side, said first voltage potential is supplied wHen an established connection is to be reidentified, said switching arrangement comprising first and second bistable logic circuits, each of said bistable logic circuits having first and second inputs and an output means, first and second means for connecting the first and second inputs, respectively, of said first bistable logic circuit to the holding wire of said second group and the control wire of said first group, respectively, one of said first and second means being a signal inverting means, third means for connecting the output means of said first bistable logic circuit to the control wire of said second group, fourth and fifth means for connecting the first and second inputs, respectively, of said second bistable logic circuit to the output means of said first bistable logic circuit and to the holding wire of said second group, respectively, sixth means for connecting the output means of said second bistable logic circuit to the holding wire of said first group, first and second speech gates, each of said speech gates having first and second inputs and an output, seventh and eighth means for connecting the outputs of said first and second speech gates, respectively, to the first speech wire of said second group and the second speech wire of said first group, respectively, ninth and 10th means for connecting the first inputs of said first and second speech gates, respectively, to the first speech wire of said first group and the second speech wire of said second group, respectively, 11th means for connecting the output means of said second bistable logic circuit to the second input of each of said speech gates, a reidentification gate having an output connected to the control wire of said first group and first, second and third inputs, 12th and 13th means for connecting the output means of said first and second bistable logic circuits, respectively, to the first and second inputs of said reidentification gate, and fourteenth means for connecting the control wire of said second group to the third input of said reidentification gate.
Claim 3
Dependent Claim
130 words
The selector network of claim 1, further including a reidentification terminal adapted to receive the first voltage potential from a marker for reidentifying an established connection, means for connecting said reidentification terminal to the control wire of said second group and a marking arrangement comprising a third bistable logic circuit having first and second inputs and an output means, means for connecting the first input of said third bistable logic circuit to the control wire of said second group, means for connecting the output means of said third bistable logic circuit to the holding wire of said second group, and a marking terminal adapted to receive the first voltage potential from the marker, and means for connecting said marking terminal to the second input of said third bistable logic circuit;
Claim 4
Dependent Claim
15 words
The selector network of claim 1 wherein said speech gates perform at least an AND-function.
Claim 5
Dependent Claim
423 words
In a selector network a switching arrangement for a crossing point between a first group of wires having first ends adapted to be connected to an initial point and a second group of wires having first ends adapted to be connected to an end point in a connecting network, each group comprising a holding wire adapted to receive a first or a second voltage potential, respectively, for indicating whether the respective group is busy or idle, respectively, a first speech wire adapted to carry speech signals supplied at the initial point and to which, at the initial point side, said first potential is supplied when a connection is to be established between wires of the same type in the respective groups, and a second speech wire adapted to carry speech signals supplied at the end point, and to which speech wire, at the end point side, said first potential is supplied when an established connection is to be reidentified, said switching arrangement comprising first and second bistable logic circuits, each of saId logic circuits having first and second inputs and an output means, an inverting gate having first and second inputs and an output connected to the first input of said first logic circuit, means for connecting each of said holding wires to a different one of the inputs of said inverting gate, means for connecting the first speech wire of said first group to the second input of said first bistable logic circuit, means for connecting the output means of said first bistable logic circuit to the first speech wire of said second group and to the first input of said second bistable logic circuit, means for connecting the second input of said second logic circuit to the holding wire of said second group, first and second speech gates, each of said speech gates having first and second inputs and an output, means for connecting the output means of said second bistable logic circuit to the first inputs of each of said speech gates and to the holding wire of said first group, means for connecting the first speech wire of said first group to the second input of said second speech gate, means for connecting the second speech wire of said second group to the second input of said first speech gate, means for connecting the output of said first speech gate to the second speech wire of said first group, and means for connecting the output of said second speech gate to the first speech wire of said second group.
Claim 6
Dependent Claim
423 words
In a selector network a switching arrangement for a crossing point between a first group of wires having first ends adapted to be connected to an initial point and a second group of wires having first ends adapted to be connected to an end point in a connecting network, each group comprising a holding wire adapted to receive a first or a second voltage potential, respectively, for indicating whether the respective group is busy or idle, respectively, a first speech wire adapted to carry speech signals supplied at the initial point and to which, at the initial point side, said first potential is supplied when a connection is to be established between wires of the same type in the respective groups, and a second speech wire adapted to carry speech signals supplied at the end point, and to which speech wire, at the end point side, said first potential is supplied when an established connection is to be reidentified, said switching arrangement comprising first and second bistable logic circuits, each of saId logic circuits having first and second inputs and an output means, an inverting gate having first and second inputs and an output connected to the first input of said first logic circuit, means for connecting each of said holding wires to a different one of the inputs of said inverting gate, means for connecting the first speech wire of said first group to the second input of said first bistable logic circuit, means for connecting the output means of said first bistable logic circuit to the first speech wire of said second group and to the first input of said second bistable logic circuit, means for connecting the second input of said second logic circuit to the holding wire of said second group, first and second speech gates, each of said speech gates having first and second inputs and an output, means for connecting the output means of said second bistable logic circuit to the first inputs of each of said speech gates and to the holding wire of said first group, means for connecting the first speech wire of said first group to the second input of said second speech gate, means for connecting the second speech wire of said second group to the second input of said first speech gate, means for connecting the output of said first speech gate to the second speech wire of said first group, and means for connecting the output of said second speech gate to the first speech wire of said second group.
Claim 7
Dependent Claim
15 words
The selector network of claim 4 wherein said speech gates perform at least an AND-function.
Claim 8
Dependent Claim
15 words
The selector network of claim 4 wherein said inverting gate performs at least an AND-function.
References Cited (Backward Citations)
US3414679A
Cited
US3573388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |