GB1296405A - - Google Patents
Info
- Publication number
- GB1296405A GB1296405A GB1296405DA GB1296405A GB 1296405 A GB1296405 A GB 1296405A GB 1296405D A GB1296405D A GB 1296405DA GB 1296405 A GB1296405 A GB 1296405A
- Authority
- GB
- United Kingdom
- Prior art keywords
- local
- coders
- timer
- utilization
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
- G08C15/06—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division
- G08C15/12—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division the signals being represented by pulse characteristics in transmission link
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
- B64D11/0015—Arrangements for entertainment or communications, e.g. radio, television
Abstract
1296405 Selective signalling INSTRUMENT SYSTEMS CORP 17 Feb 1970 [20 Feb 1969 (2) 5 Sept 1969] 7576/70 Heading G4H [Also in Division H4] In an entertainment service system, e.g. for an aircraft, a number of programmes are broadcast in time division multiplex on a single line feeding a number of stations, e.g. one at each seat. Each station has a selector and a transducer, whereby a selected programme can be reproduced on the transducer at that station. Each station also has utilization control means each associated with respective utilization circuits, e.g. for service call lights or lamps for general illumination or reading. The local utilization controls are connected to local coders which are connected in series with a central timer. Local decoders associated with the respective utilization circuits are also connected in series with the central timer. The coders and decoders are activated sequentially by the timer to allow the local control to effect operation of the respective utilization circuit. As described, a main multiplexer 12, Fig. 1, is fed with a 10-channel audio input and pulse code modulated samples of the signals in each channel are time division multiplexed on to a single line 13 for distribution to a number of submultiplexers 14 where respective groups of 5 audio channels are added to the signals from the main multiplexer. The additional signals may be in respect of films or other entertainment particular to a respective zone of the aircraft. Each zone submultiplexer 14 feeds a number of local demultiplexers 18 feeding a group of transducers 20, e.g. located in a row of seats, each of which has a local control 22 to enable selection of the programme to be reproduced. Audio channel samples may be prefixed by a "stereo-tag" signifying that a pair of channels are to be reproduced by the transducers when that channel is selected. An override public ,address arrangement is provided to enable announcements to be reproduced at each transducer irrespective of the channel selected at the respective selector. Each local control is also connected to a local coder 28, all of which are located in a loop between lines 32 and 34 connected to the column timer 26. The coders are arranged to receive clock pulses from the column timer over the loop and respond sequentially so that signals indicating the states of the local utilization controls are fed back sequentially to the column timer from which they may be transmitted, together with clock signals, to the local decoders 30, to be selected and applied sequentially to the respective utilization circuits 24. In one system, as shown in Fig. 1, the data from the coders is transmitted over a common line 32, this system is the subject of divisional Specification 1,296,408, in an alternative arrangement the data is transmitted back through the previously operated coders, to reach the appropriate decoder via the previously operated decoders, this system is the subject of divisional Specification 1,296,407. A testing arrangement is provided which applies a test signal of predetermined frequency to the inputs of the audio channels. When received at the local control stations they cause overriding of the service call lamp control to produce an effect equivalent to the repetitive opening and closing of the control switch. The effect is arranged only to occur if the transducers associated with the control station are effective and to be inhibited if the transducers are open circuit. The testing system is the subject-matter of divisional Specification 1,296,406.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80094369A | 1969-02-20 | 1969-02-20 | |
US80094169A | 1969-02-20 | 1969-02-20 | |
US85552769A | 1969-09-05 | 1969-09-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1296405A true GB1296405A (en) | 1972-11-15 |
Family
ID=27419967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1296405D Expired GB1296405A (en) | 1969-02-20 | 1970-02-17 |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2007941C3 (en) |
FR (1) | FR2034763A1 (en) |
GB (1) | GB1296405A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2162724A (en) * | 1984-07-20 | 1986-02-05 | Messerschmitt Boelkow Blohm | A method of and arrangement for carrying out passenger-related and/or air-steward-related functions in an aircraft |
FR2574370A2 (en) * | 1984-12-08 | 1986-06-13 | Messerschmitt Boelkow Blohm | METHOD AND DEVICE FOR PERFORMING, ON BOARD AN AIRPLANE, FUNCTIONS CONCERNING PASSENGERS AND ACCOMPANYING STAFF |
EP0278717A2 (en) * | 1987-02-10 | 1988-08-17 | Sony Corporation | Passenger vehicle polling systems and methods |
US5889775A (en) * | 1995-08-07 | 1999-03-30 | Be Aerospace, Inc. | Multi-stage switch |
US6058288A (en) * | 1995-08-07 | 2000-05-02 | Sextant In-Flight Systems, Llc | Passenger service and entertainment system |
-
1970
- 1970-02-17 GB GB1296405D patent/GB1296405A/en not_active Expired
- 1970-02-19 FR FR7005998A patent/FR2034763A1/fr not_active Withdrawn
- 1970-02-20 DE DE2007941A patent/DE2007941C3/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2162724A (en) * | 1984-07-20 | 1986-02-05 | Messerschmitt Boelkow Blohm | A method of and arrangement for carrying out passenger-related and/or air-steward-related functions in an aircraft |
FR2574370A2 (en) * | 1984-12-08 | 1986-06-13 | Messerschmitt Boelkow Blohm | METHOD AND DEVICE FOR PERFORMING, ON BOARD AN AIRPLANE, FUNCTIONS CONCERNING PASSENGERS AND ACCOMPANYING STAFF |
GB2168880A (en) * | 1984-12-08 | 1986-06-25 | Messerschmitt Boelkow Blohm | A method of and arrangement for performing passenger-related and/or air-steward-related functions in an aircraft |
EP0278717A2 (en) * | 1987-02-10 | 1988-08-17 | Sony Corporation | Passenger vehicle polling systems and methods |
EP0278717A3 (en) * | 1987-02-10 | 1989-11-29 | Sony Corporation | Passenger vehicle polling systems and methods |
US5889775A (en) * | 1995-08-07 | 1999-03-30 | Be Aerospace, Inc. | Multi-stage switch |
US6058288A (en) * | 1995-08-07 | 2000-05-02 | Sextant In-Flight Systems, Llc | Passenger service and entertainment system |
Also Published As
Publication number | Publication date |
---|---|
DE2007941B2 (en) | 1979-09-06 |
DE2007941A1 (en) | 1970-09-10 |
DE2007941C3 (en) | 1980-05-14 |
FR2034763A1 (en) | 1970-12-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3795771A (en) | Passenger entertainment/passenger service and self-test system | |
DE3854480T2 (en) | Service and entertainment messaging systems. | |
GB2185364B (en) | Communication system | |
GB1451368A (en) | Data communication system employing a series loop | |
FR2336726A1 (en) | Automatic processing of vehicle control signals - uses signal multiplexing and decoding on channels transmitted via antenna network | |
GB1296408A (en) | ||
GB1296405A (en) | ||
GB1296407A (en) | ||
US3546384A (en) | Multiplex synchronizing system | |
ES2149946T3 (en) | AUTOMATIC IDENTIFICATION DEVICE AND MEMORIZATION OF TELEVISION CHANNELS. | |
FR2284233A1 (en) | Digital data transmission system for aircraft - has several signals sending and receiving units connected to common transmission channel | |
GB903478A (en) | Improvements in or relating to signal transmission systems | |
GB1296406A (en) | ||
ES8303852A1 (en) | TASI system including an order wire. | |
US3924075A (en) | Two-way privacy system terminal with single key pulse generator means | |
FR2399162A1 (en) | Faults detection device in multiplexed data transmission network - utilises test unit to determine functional condition of channel | |
JPS5310912A (en) | Two-way multiplex transmission control system | |
GB959274A (en) | Cueing system for television | |
JPS55158750A (en) | Order circuit forming system for time-division multiple phase modulation multi-directional ratio communication system | |
GB1299636A (en) | Multi-channel signal processing system | |
US3856996A (en) | Self-test arrangement for an entertainment-service system | |
FR2295650A2 (en) | Time division multiplexing data transmission system - uses a controlled coder for the production of a series of pseudo-random signals | |
SU1133670A2 (en) | Audio broadcasting receiver | |
ES8705724A1 (en) | Facility for transmitting generally accessible information | |
JPS55140352A (en) | Speaker telephone set connecting system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |