US5060257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Videotex terminal for receiving telecopies
Assignee: Sagem SA
•
Filing: 1990-04-11
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Granted: 1991-10-22
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Expires: 2010-04-11
Abstract
Abstract A videotex terminal capable of receiving telecopies is disclosed, comprising a printing device at the output of its modem for printing fixed images in response to graphic data from a source connected to the telephone network, and the procedure for communicating the graphic data comprises protocol phases, during which the terminal and the source exchange questions and answers in the form of data transmitted at a first speed via the modem used alternately in one direction and in the other, and transfer phases, during which a flow of graphic data is transmitted by the modem, at this first speed, from the source to the terminal and data for regulating said flow are transmitted by the modem, at a second speed, from the terminal to the source.
Inventors
- 👤 Georges Penalver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/327; H04N1/32704; H04N1/32706; H04N1/32713; H04M; H04M11/00; H04M11/08; H04M11/085; H04N1/32765; H04N1/32771
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
231 words
A videotex terminal which can be connected to a telephone network for asking for and receiving pages of characters from a server center also connected to said network, and comprising: a control keyboard, a display screen, and a modem with an input connected to the keyboard, an output connected to said screen and a bidirectional access connectable to a telephone line of said network, said modem being normally provided for transmitting data from said center at a first speed and data towards said center at a second speed, in which terminal are provided: means connected to the output of said modem, for printing fixed images in response to first graphic data from a source such as a graphic server center or a telecopier connected to said network, and means for controlling procedures for communicating said first graphic data and videotex characters whereby at least one procedure for communicating comprises protocol phases during which said terminal and said source exchange questions and answers in the form of data transmitted at said first speed via the modem used alternately in one direction and in the other, and transfer phases, during which a flow of first graphic data is transmitted by said modem, at said first speed, from the source to said terminal and data for regulating said flow is transmitted by said modem, at said second speed, from said terminal to said source.
Claim 2
Dependent Claim
231 words
A videotex terminal which can be connected to a telephone network for asking for and receiving pages of characters from a server center also connected to said network, and comprising: a control keyboard, a display screen, and a modem with an input connected to the keyboard, an output connected to said screen and a bidirectional access connectable to a telephone line of said network, said modem being normally provided for transmitting data from said center at a first speed and data towards said center at a second speed, in which terminal are provided: means connected to the output of said modem, for printing fixed images in response to first graphic data from a source such as a graphic server center or a telecopier connected to said network, and means for controlling procedures for communicating said first graphic data and videotex characters whereby at least one procedure for communicating comprises protocol phases during which said terminal and said source exchange questions and answers in the form of data transmitted at said first speed via the modem used alternately in one direction and in the other, and transfer phases, during which a flow of first graphic data is transmitted by said modem, at said first speed, from the source to said terminal and data for regulating said flow is transmitted by said modem, at said second speed, from said terminal to said source.
Claim 3
Dependent Claim
88 words
The terminal as claimed in claim 1, further comprising the following: means for detecting a call, disposed in said telephone line, means for connecting said telephone line to said modem access, in response to a detected call, alarm means, and means, connected to the output of said modem, for detecting a first graphic data transmission request, and for controlling, in the case of a first graphic data transmission request, said printing means and, in the absence of detection of a first graphic data transmission request, said alarm means.
Claim 4
Dependent Claim
50 words
The terminal as claimed in claim 1, wherein means are provided, connected to said modem output, for converting, into graphic data, data representing videotex characters to be displayed on said screen and for controlling said printing means to reproduce a copy of said screen in response to the converted data.
Claim 5
Dependent Claim
66 words
The terminal as claimed in claim 1, wherein means are provided for analyzing fixed images, having an output connected to said modem input and delivering second graphic data for transmitting said second graphic data for remotely reproducing fixed analyzed images whereby procedure for communicating said second graphic data is identical to said at least one procedure for communicating, with reversal of the direction of said modem.
Claim 6
Dependent Claim
56 words
The terminal as claimed in claim 1, wherein switching means are provided for switching off the electric power supply to said terminal during rest periods of said terminal, except for said call detection means, said switching means being controlled by said call detection means to re-establish the electric power supply in response to a call detection.
Claim 7
Dependent Claim
75 words
The terminal as claimed in claim 1, wherein the graphic data to be transmitted is in the form of a succession of binary elements resulting from the pixel by pixel analysis of the image to be transmitted, said succession is broken up into a plurality of groups of binary elements, each of said groups is transmitted separately by the modem and said succession is recomposed after transmission in the modem for reproducing said fixed image.
Claim 8
Dependent Claim
145 words
The terminal as claimed in claim 1, further comprising: call detection means, disposed in said telephone line, means for connecting said telephone line to said modem access, in response to a detected call, means, connected to the output of said modem, for detecting a first graphic data transmission request and controlling, in the case of a first graphic data transmission request, said printing means so that they print said first graphic data, alarm means, and means connected to the output of said modem for, in the absence of a first graphic data transmission request, detecting a request for transmission of pages of videotex characters and controlling, in the case of a request for the transmission of pages of characters, means for receiving these pages of characters and for controlling said alarm means in the absence of a request for the transmission of pages of characters.
Claim 9
Dependent Claim
20 words
The terminal as claimed in claim 7, wherein said means for receiving pages of videotex characters comprise said printing means.
Claim 10
Dependent Claim
44 words
The terminal as claimed in claim 7, wherein means are provided, connected to the output of said modem, for converting, into graphic data, data representing characters to be displayed on said screen and for transmitting said graphic data for remote reproduction of said characters.
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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) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |