GB1296406A - - Google Patents
Info
- Publication number
- GB1296406A GB1296406A GB1296406DA GB1296406A GB 1296406 A GB1296406 A GB 1296406A GB 1296406D A GB1296406D A GB 1296406DA GB 1296406 A GB1296406 A GB 1296406A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gate
- feb
- control
- filters
- over
- 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
Abstract
1296406 Selective signalling INSTRUMENT SYSTEMS CORP 17 Feb 1970 [20 Feb 1969] 40322/71 Divided out of 1296405 Heading G4H [Also in Division H4] The description of an entertainment service system is identical with that of Specification 1,296,405, the claims relate to the testing arrangement for the system in which signals of a predetermined frequency are transmitted over the entertainment system, detected by selective filters at the transducer circuits and via an "AND" gate cause setting of the local utilization control circuit in such a condition as to indicate correct operation of the system. As described, the filters 222 and 224 detect the test signal on the signal input lines at one of the utilization stations and via "AND" gate 226 control a switching circuit 174 to have the same effect as repetitive switching on and off of the service call light switch 170 to cause flashing of that light at the central location. In addition further inputs to the "AND" gate 226 are derived from circuits 228 and 230 which sense the continuity of the transducers 128 and 130 The whole system is thus tested by ensuring reception of an audio signal over the distributtion system and signalling a response over the control system.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US80094169A | 1969-02-20 | 1969-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1296406A true GB1296406A (en) | 1972-11-15 |
Family
ID=25179773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1296406D Expired GB1296406A (en) | 1969-02-20 | 1970-02-17 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3585307A (en) |
| GB (1) | GB1296406A (en) |
Cited By (2)
| 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 |
| 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 |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3795771A (en) * | 1970-05-15 | 1974-03-05 | Hughes Aircraft Co | Passenger entertainment/passenger service and self-test system |
| US3723658A (en) * | 1971-06-30 | 1973-03-27 | Ddi Communications Inc | Extendable multiplexer |
| US3770948A (en) * | 1972-05-26 | 1973-11-06 | Gte Automatic Electric Lab Inc | Data handling system maintenance arrangement |
| US4024345A (en) * | 1976-01-14 | 1977-05-17 | Strom Industries International, Inc. | Audio program and telephonic communication system |
| US4374435A (en) * | 1980-12-23 | 1983-02-15 | United Technologies Corporation | Passenger entertainment system transducer failure detector |
| US5481478A (en) * | 1994-06-03 | 1996-01-02 | Palmieri; Herman D. | Broadcast system for a facility |
| JP4307773B2 (en) * | 1999-09-02 | 2009-08-05 | 富士通株式会社 | Method for time division multiplexing |
| US7411427B1 (en) | 2006-07-28 | 2008-08-12 | Zilog, Inc. | Clock input filter circuit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1968546A (en) * | 1930-10-29 | 1934-07-31 | Radio Corp Of American | Audio frequency distribution system |
| US1944308A (en) * | 1933-02-15 | 1934-01-23 | American Telephone & Telegraph | Transmission system |
| US3057972A (en) * | 1959-12-23 | 1962-10-09 | Bell Telephone Labor Inc | Testing the performance of pcm receivers |
| US3259695A (en) * | 1961-11-27 | 1966-07-05 | Nippon Electric Co | Malfunction monitoring of time-division multiplex pcm equipment |
| US3508001A (en) * | 1966-06-24 | 1970-04-21 | P & H Electronics | Electric retrieval system |
-
1969
- 1969-02-20 US US800941A patent/US3585307A/en not_active Expired - Lifetime
-
1970
- 1970-02-17 GB GB1296406D patent/GB1296406A/en not_active Expired
Cited By (2)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| US3585307A (en) | 1971-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1493899A (en) | Series closed loop transmission system | |
| GB1296406A (en) | ||
| GB1396644A (en) | Control systems | |
| GB1114522A (en) | Analogue signal transmission system | |
| GB1296408A (en) | ||
| GB1504177A (en) | Dictation system | |
| GB1338896A (en) | Hybrid networks | |
| GB1430646A (en) | Muting circuit | |
| GB1153671A (en) | Conference Circuits | |
| ES448143A1 (en) | Safety circuit, especially for elevators and the like | |
| GB936700A (en) | Carrier signal attenuation | |
| ES336386A1 (en) | Supervision system for multiple telecommunication systems by time division. (Machine-translation by Google Translate, not legally binding) | |
| GB1335006A (en) | Method and device for transmitting data messages | |
| GB1243364A (en) | Broadcast system for a control signal | |
| GB1118979A (en) | Improved i.l.s. air-borne receiver | |
| GB907961A (en) | Improvements in or relating to circuit arrangements for testing for the presence of voltages | |
| GB1401627A (en) | Testing for telecommunications switching systems | |
| GB1258915A (en) | ||
| GB902031A (en) | Improvements in or relating to radio transmitter control systems | |
| ES463979A1 (en) | Logic circuits | |
| JPS5464907A (en) | Automatic station by-pass device | |
| GB640157A (en) | Switching system | |
| GB1329883A (en) | Synchronous transmission systems | |
| GB1052926A (en) | ||
| SU1168996A1 (en) | Multichannel signalling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |