US4367485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way microwave television system
Assignee: TELECOM ENGR Inc
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Filing: 1981-03-10
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Granted: 1983-01-04
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Expires: 2001-03-10
Abstract
Abstract A two-way microwave television system for linking a master or teaching station with a plurality of sub-station schools via a single microwave link is presented. The sub-station schools are located at dispersed school sites and function as relay stations to complete a network covering a geographical area of greater dimensions than could be achieved by the master station unassisted. A single duplex microwave channel is used to transmit a picture originating at the master station and special effects generators located at each of the sub-station school relay sites combine, through a special video switching network, responses from each sub-station school to form an integrated frame containing the response from each sub-station in a format which can be transmitted on a single channel carrier.
Inventors
- 👤 Dale L. Hemmie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:52
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/20; H04N7/14; H04N7/15
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
A two-way television system, comprising: a master station, including, a video camera means for generating a first video signal, means for transmitting said first video signal, means for receiving a composite video signal, and a video display means for displaying said composite video signal; a relay station including, a first receiver means for receiving said first video signal, a first transmitter means for transmitting said received first video signal, a second receiver means for receiving a second video signal, a video camera means for generating a third video signal, a special effects generator means for creating said composite video signal by combining said second and third video signals, a second transmitter means for transmitting said composite video signal, and a video display means for displaying said first video signal; and a remote station, including means for receiving said first video signal transmitted by said first transmitter means, a video display means for displaying said first video signal, a video camera means for generating said second video signal, and means for transmitting said second video signal.
Claim 2
Dependent Claim
175 words
A two-way television system, comprising: a master station, including, a video camera means for generating a first video signal, means for transmitting said first video signal, means for receiving a composite video signal, and a video display means for displaying said composite video signal; a relay station including, a first receiver means for receiving said first video signal, a first transmitter means for transmitting said received first video signal, a second receiver means for receiving a second video signal, a video camera means for generating a third video signal, a special effects generator means for creating said composite video signal by combining said second and third video signals, a second transmitter means for transmitting said composite video signal, and a video display means for displaying said first video signal; and a remote station, including means for receiving said first video signal transmitted by said first transmitter means, a video display means for displaying said first video signal, a video camera means for generating said second video signal, and means for transmitting said second video signal.
Claim 3
Dependent Claim
66 words
A two-way television system as defined in claim 1 wherein said relay station includes video switching means for selectively interconnecting; said first receiver means to said first transmitter means, said second receiver means to said special effects generator means, said video camera video means for generating a third video signal to said special effects generator means, and said special effects generator to said second transmitter means.
Claim 4
Dependent Claim
22 words
A two-way television system as defined in claim 2, comprising: means for synchronizing said third video signal with said second video signal.
Claim 5
Dependent Claim
233 words
A video switching network, comprising: a first single-pole double-throw video switch for connecting a transmitter to a video distribution network in a first position or to a second single-pole double-throw video switch in a second position; said second single-pole double-throw video switch including first contact means connected to a special effects generator and second contact means coupled to a contact of a third single-pole double-throw switch having a contact arm connected to a second video distribution network and the second contact of which is connected to a contact of a fourth single-pole double-throw video switch whose other contact is connected to said special effects generator and whose movable contact is connected to a contact of a fifth single-pole double-throw video switch whose other contact is connected to said first video distribution network and whose movable contact is connected to a second transmitter means; and a sixth single-pole double-throw video switch having a movable contact connected to a first receiver means and one contact connected to said special effects generator and a second contact connected to a contact of a seventh single-pole double-throw video switch whose movable contact is connected to said second video distribution network and said other contact is connected to a contact of an eighth single-pole double-throw video switch whose other contact is connected to said special effects generator and whose movable contact arm is connected to a second transmitter means.
Claim 6
Dependent Claim
233 words
A video switching network, comprising: a first single-pole double-throw video switch for connecting a transmitter to a video distribution network in a first position or to a second single-pole double-throw video switch in a second position; said second single-pole double-throw video switch including first contact means connected to a special effects generator and second contact means coupled to a contact of a third single-pole double-throw switch having a contact arm connected to a second video distribution network and the second contact of which is connected to a contact of a fourth single-pole double-throw video switch whose other contact is connected to said special effects generator and whose movable contact is connected to a contact of a fifth single-pole double-throw video switch whose other contact is connected to said first video distribution network and whose movable contact is connected to a second transmitter means; and a sixth single-pole double-throw video switch having a movable contact connected to a first receiver means and one contact connected to said special effects generator and a second contact connected to a contact of a seventh single-pole double-throw video switch whose movable contact is connected to said second video distribution network and said other contact is connected to a contact of an eighth single-pole double-throw video switch whose other contact is connected to said special effects generator and whose movable contact arm is connected to a second transmitter means.
Claim 7
Dependent Claim
32 words
A switching network as defined in claim 4 further including a video camera connected to said first video distribution network and a video display means connected to said second video distribution network.
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) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |