US3651273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for coupling, holding and releasing of crosspoint relays in a connection path in telecommunication systems
Assignee: International Standard Electric Corp
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Filing: 1969-10-13
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Granted: 1972-03-21
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Expires: 1989-10-13
Abstract
Abstract A marking and holding circuit for cross-point relays in a plural stage communications switching network. In each stage, the winding of the cross-point relay is held through an individual hold path including its own contacts. The holding potential in successive stages is connected in a back-to-back arrangement to allow selected relays in successive stages to be seized in multiple to complete a path through the network. In the path, the selected relay in each stage is held individually through its own cross-point contacts.
Inventors
- 👤 Heinrich Halfmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:34
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0008; H04Q3/0012
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
In a telephone system, a circuit arrangement for the coupling, holding and releasing of cross-point relays in a connecting path leading through a number of connecting stages in a cross-point network with links, in which path the windings of the cross-point relays are each connected in series with an associated holding contact are multipled on the input and output sides according to the structure of the cross-point multiples, the windings of the cross-point relays being directly selectable via marking circuits, while the cross-point relays are releasable by breaking the holding circuit, characterized in that there is fed a holding potential or a holding counter-potential to each input and each output of all of the cross-point multiples of all connecting stages independently, that the individual holding circuits connected to the links connecting two connecting stages together each carry the same potential and alternate between holding potential and holding counter-potential from connecting stage to connecting stage, and that the individual input and output holding circuits associated with each cross-point multiple are combined together and can be switched out of circuit via cutoff means.
Claim 2
Dependent Claim
181 words
In a telephone system, a circuit arrangement for the coupling, holding and releasing of cross-point relays in a connecting path leading through a number of connecting stages in a cross-point network with links, in which path the windings of the cross-point relays are each connected in series with an associated holding contact are multipled on the input and output sides according to the structure of the cross-point multiples, the windings of the cross-point relays being directly selectable via marking circuits, while the cross-point relays are releasable by breaking the holding circuit, characterized in that there is fed a holding potential or a holding counter-potential to each input and each output of all of the cross-point multiples of all connecting stages independently, that the individual holding circuits connected to the links connecting two connecting stages together each carry the same potential and alternate between holding potential and holding counter-potential from connecting stage to connecting stage, and that the individual input and output holding circuits associated with each cross-point multiple are combined together and can be switched out of circuit via cutoff means.
Claim 3
Dependent Claim
38 words
A circuit arrangement as claimed in claim 1, characterized in that the order of the winding and of the holding contact of the cross-point relay is changed in the series connection thereof from connecting stage to connecting stage.
Claim 4
Dependent Claim
28 words
A circuit arrangement as claimed in claim 1, characterized in that the input and output holding circuits of each cross-point multiple are decoupled from each other by diodes.
Claim 5
Dependent Claim
58 words
A circuit arrangement as claimed in claim 1, characterized in that said marking circuits apply marking potential and marking counter-potential, and wherein the holding potential has a different polarity from the marking potential, that the holding counter-potential is the same as the marking counter-potential, and that an additional decoupling diode is included in each of the marking circuits.
Claim 6
Dependent Claim
47 words
A circuit arrangement as claimed in claim 4, characterized in that there are means for feeding the holding counter-potential and the marking potential to one terminal of the winding of each selected cross-point relay, and for feeding the other terminal of the winding of the cross-point relay.
Claim 7
Dependent Claim
38 words
A circuit arrangement as claimed in claim 1, characterized in that the marking potential is connected to links which are connected to the winding of each selected cross-point relay, only in one of the two connecting stages involved.
Claim 8
Dependent Claim
61 words
A circuit arrangement as claimed in claim 6, characterized in that the marking potential is simultaneously fed to all of the inputs of like ordinal number in all of the cross-point multiples in a connecting stage and that the marking line may be connected through to the required input in the selected cross-point multiple via a contact of a switching device.
Claim 9
Dependent Claim
41 words
A circuit arrangement as claimed in claim 6, characterized in that the number of marking circuits for the marking potential and marking counter-potential is equal to the number of inputs or outputs of a cross-point multiple in the selected connecting stage.
Claim 10
Dependent Claim
89 words
A circuit arrangement as claimed in claim 1, characterized in that at inputs or outputs of a cross-point multiple to which a number of links are connected, the links of the adjacent connecting stage carry no holding potential or holding counter-potential and that at the particular input or output of the cross-point multiple the holding potential or the holding counter-potential can be fed either via the holding circuit within the cross-point multiple or via a holding circuit characterizing the input or output and controlled by a central control unit.
References Cited (Backward Citations)
US3489854A
Cited
US3546387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |