Patent US3798358A successfully refreshed from Google Patents.
US3798358A
Expired / Lapsed
US
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Facsimile transmission system
Assignee: Individual
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Filing: 1972-04-25
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Granted: 1974-03-19
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Expires: 1992-04-25
Abstract
Abstract The invention describes a facsimile transmission system which allows facsimile pictures to be additionally transmitted in the field-blanking intervals over a normal transmission path for television signals. The mechanical relative movement between facsimile scanner and subject copy, which has been common in facsimile so far, is replaced by a selective electronic slippage between the facsimile frame produced with normal frame pickup units and the frame in whose field-blanking intervals the facsimile picture is to be transmitted line by line. Through the easily controllable slippage, sequential lines of the facsimile picture are transmitted in sequential field-blanking intervals, so that at the receiving end of the transmission path the facsimile frame can be reproduced without any special problems of synchronizing mechanical movements having to be solved.
Inventors
- 👤 G Moll
- 👤 N Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:29
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00095; H04N1/00098; H04N1/46; H04N1/64; H04N7/00; H04N7/08; H04N7/087
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
115 words
A facsimile transmission system for the transmission of facsimile signals during the vertical blanking intervals of a standard television signal comprising: a first source of standard television signal having a first sync signal; a second source of facsimile signal; and a first electronic control means coupled to said first and second sources responsive to said first sync signal to insert said facsimile signal into at least a selected one of said vertical blanking intervals of said standard television signal, said first control means introducing both a horizontal synchronizing frequency and vertical synchronizing frequency electronic slip of the facsimile signal raster relative to a standard television signal raster, said first control means producing a standard-television-facsimile signal.
Claim 2
Dependent Claim
115 words
A facsimile transmission system for the transmission of facsimile signals during the vertical blanking intervals of a standard television signal comprising: a first source of standard television signal having a first sync signal; a second source of facsimile signal; and a first electronic control means coupled to said first and second sources responsive to said first sync signal to insert said facsimile signal into at least a selected one of said vertical blanking intervals of said standard television signal, said first control means introducing both a horizontal synchronizing frequency and vertical synchronizing frequency electronic slip of the facsimile signal raster relative to a standard television signal raster, said first control means producing a standard-television-facsimile signal.
Claim 3
Dependent Claim
41 words
A system according to claim 1, further including a plurality of said second source, and said first control means inserts the facsimile signal of each of said plurality of said second sources in different selected ones of said vertical blanking intervals.
Claim 4
Dependent Claim
67 words
A system according to claim 1, further including a reproduction means for said facsimile signal; and a second electronic control means coupled to said first control means and said reproduction means, said second control means being responsive to said first sync signal to produce control signals to control said reproduction means, said control signals providing said electronic slip and separating said facsimile signal from said standard-television-facsimile signal.
Claim 5
Dependent Claim
32 words
A system according to claim 3, wherein said second source includes a pickup device commonly employed in standard television systems; and said reproduction means includes equipment commonly employed in standard television systems.
Claim 6
Dependent Claim
140 words
A system according to claim 3, wherein said first and second control means are adjusted to provide said electronic slip according to the following relations TH'' Z/Z + or - F TH ; TH'' z/z + or - F TH TB'' Z/Z + or - F TB ; TV'' z/z + or - F TV, where TH'' equals the line duration of said facsimile raster, TH equals the line duration of said standard raster, TB'' equals the frame duration of said facsimile raster, TV'' equals the field duration of said facsimile raster, TV equals the field duration of said standard raster, TB equals the frame duration of said standard raster, Z equals the line number of a standard frame, z equals the line number of a standard field and F equals the change of line number of said facsimile raster.
Claim 7
Dependent Claim
140 words
A system according to claim 3, wherein said first and second control means are adjusted to provide said electronic slip according to the following relations fH'' Z + or - F/Z fH ; fH'' z + or - F/z fH fB'' Z + or - F/Z fB ; fV'' z + or - F/z fV, where fH equals the line frequency of said standard raster, fH'' equals the line frequency of said facsimile raster, fB'' equals the frame frequency of said facsimile raster, fB equals the frame frequency of said standard raster, fV'' equals the field frequency of said facsimile raster, fV equals the field frequency of said standard raster, Z equals the line number of a standard frame, z equals the line number of a standard field and F equals the change of line number of said facsimile raster.
Claim 8
Dependent Claim
26 words
A system according to claim 3, wherein said first control means reverses the polarity of said standard-television-facsimile signal when said reproduction means produces negative pictures only.
Claim 9
Dependent Claim
56 words
A system according to claim 3, wherein said second source is controlled by a second sync signal derived from said first sync signal; and said first control means includes first circuit means to lock said first and second sync signals together in a predetermined frequency difference with respect to each other to insure said electronic slip.
Claim 10
Dependent Claim
40 words
A system according to claim 8, wherein said second control means includes second circuit means to lock said control signals and said first sync signals in said predetermined frequency difference with respect to each other to insure said electronic slip.
Claim 11
Dependent Claim
36 words
A system according to claim 3, wherein said first control means includes first switching means coupled to said first and second sources to insert said facsimile signal into said selected one of said vertical blanking intervals.
Claim 12
Dependent Claim
43 words
A system according to claim 10, wherein said second control means includes second switching means coupled to said first control means and under control of at least one of said control signals to separate said facsimile signal from said standard-television-facsimile signal for reproduction.
Claim 13
Dependent Claim
16 words
A system according to claim 3, wherein said second source provides color facsimile signals for transmission.
Claim 14
Dependent Claim
25 words
A system according to claim 12, wherein said reproduction means includes first circuit means to reproduce color facsimile picture when color facsimile signals are transmitted.
Claim 15
Dependent Claim
16 words
A system according to claim 13, wherein said first circuit means operates as a television episcope.
References Cited (Backward Citations)
US3493674A
Cited
US3507986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |