US3790699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simplex radiotelegraph system
Assignee: DE ZENVERTEGENWOORDIGD DIRECTEUR GENERAAL POSTER TELEGR TELEF NL
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Filing: 1972-04-26
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Granted: 1974-02-05
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Expires: 1992-04-26
Abstract
Abstract A simplex radio telegraph system with automatic error correction, wherein message signals transmitted to a receiving station are included in time spaced frames. The time space between consecutive ones of said frames being employed by the receiving station to return one of two service signals to indicate to the sending station whether transmission can be continued or a message signal due to an error has to be repeated. Each station is provided with circuitry for sending and detecting, respectively, a third service signal, and additional circuitry for sending and detecting, respectively, a service frame for calling-in said third service signal so as to bring a sending station into its received state, and vice versa. In order to cease established communication(s) to give priority to one or more stations involved in an emergency situation, an auxiliary circuit arrangement is provided by which a station when in its receiving state is able to transmit a fourth service signal. A station when in its sending state can be caused to respond to a fourth service signal through an OR-gate to bring its time distributers into a stand-by state. Alternatively a station when in its receiving state can be caused to respond to a specific service frame through the fore-said OR-gate to bring its time distributors into a stand-by state.
Inventors
- 👤 H Dasilva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:21
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
An automatic error correcting simplex telecommunication system for interrupting traffic information between two stations in which each station has: A. means for transmitting blocks of traffic information signals spaced by pauses between each block, B. means for transmitting two different answer-back service signals during said pauses for indicating correct and incorrect reception of the block just received from a remote station, and C. means for transmitting during one of said pauses, a third service signal different from said two answer-back service signals for indicating to said remote station that the direction of traffic information is to be changed; the improvement comprising: D. means for transmitting a fourth service signal different from said other three service signals for placing any remote station in a stand-by position.
Claim 2
Dependent Claim
125 words
An automatic error correcting simplex telecommunication system for interrupting traffic information between two stations in which each station has: A. means for transmitting blocks of traffic information signals spaced by pauses between each block, B. means for transmitting two different answer-back service signals during said pauses for indicating correct and incorrect reception of the block just received from a remote station, and C. means for transmitting during one of said pauses, a third service signal different from said two answer-back service signals for indicating to said remote station that the direction of traffic information is to be changed; the improvement comprising: D. means for transmitting a fourth service signal different from said other three service signals for placing any remote station in a stand-by position.
Claim 3
Dependent Claim
38 words
A system according to claim 1 wherein one station is a master station and the other station is a slave station which condition is maintained irrespective of the direction of traffic except when placed in said stand-by position.
Claim 4
Dependent Claim
36 words
A system according to claim 1 wherein said fourth service signal comprises a special block signal transmitted from a transmitting station, and a fourth service signal transmitted during said pauses when transmitted from a receiving station.
Claim 5
Dependent Claim
27 words
A system according to claim 3 wherein each of said stations has time distributors, and wherein said fourth service signal places said distributors in their stand-by positions.
Claim 6
Dependent Claim
27 words
A system according to claim 4 wherein each of said stations includes an OR-gate for controlling said distributors responsive to either of said fourth special service signals.
Claim 7
Dependent Claim
139 words
In an automatic error correcting simplex telecommunication system in which spaced blocks of information signals are transmitted in one direction between two stations, and two different answer back signals are transmitted from the station receiving said blocks between each block to indicate to the block transmitting station that the just received block was either correctly received and the next block should be transmitted or that the just received block was incorrectly received and must be repeated, means for generating a third answer back signal at the block receiving station and transmitting it between said blocks for changing said block transmitting station to a block receiving station, the improvement comprising: means for interrupting the transmission between said stations comprising means at each station for transmitting a fourth service signal for placing the remote station in stand-by position for emergency operation.
Claim 8
Dependent Claim
139 words
In an automatic error correcting simplex telecommunication system in which spaced blocks of information signals are transmitted in one direction between two stations, and two different answer back signals are transmitted from the station receiving said blocks between each block to indicate to the block transmitting station that the just received block was either correctly received and the next block should be transmitted or that the just received block was incorrectly received and must be repeated, means for generating a third answer back signal at the block receiving station and transmitting it between said blocks for changing said block transmitting station to a block receiving station, the improvement comprising: means for interrupting the transmission between said stations comprising means at each station for transmitting a fourth service signal for placing the remote station in stand-by position for emergency operation.
Claim 9
Dependent Claim
46 words
A system according to claim 6 wherein said means for transmitting said fourth service signal comprises means for transmitting a special block signal from said transmitting station, and means for transmitting a special fourth service signal in the spaces between said blocks from said receiving station.
Claim 10
Dependent Claim
30 words
A system according to claim 7 wherein each said station comprises time distributors, and means responsive to said fourth service signals for placing said time distributing means in stand-by operation.
Claim 11
Dependent Claim
23 words
A system according to claim 8 including an OR-gate responsive to either of said fourth service signals for controlling said time distributing means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |