GB475239A - Improvements in multiplex telephony and the like - Google Patents
Improvements in multiplex telephony and the likeInfo
- Publication number
- GB475239A GB475239A GB6080/37A GB608037A GB475239A GB 475239 A GB475239 A GB 475239A GB 6080/37 A GB6080/37 A GB 6080/37A GB 608037 A GB608037 A GB 608037A GB 475239 A GB475239 A GB 475239A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transmission
- screen
- kinescopes
- scanned
- traces
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/18—Time-division multiplex systems using frequency compression and subsequent expansion of the individual signals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
475,239. Multiplex transmission. HENROTEAU, F. C. P. March 1, 1937, No. 6080. Convention date, Jan. 16. [Class 40 (iv)] [Also in Group XL] In a system of the kind in which elementary portions of several messages are recorded and are then reproduced in succession at a high speed for transmission, recording and reproduction at both ends of the system are effected by " kinescopes " in which a soundmodulated or signal-modulated cathode ray makes a temporary trace on a fluorescent screen and " iconoscopes " which comprise a screen formed from innumerable photo-electrically charged condensers which are scanned by a cathode ray. The sound traces made by kinescopes corresponding to several channels are optically projected onto the screen of an iconoscope which is completely scanned in the time taken by the rays of the kinescopes to make a single traverse. The variable currents produced by the discharge of the elementary condensers, or by secondary emission may be used for transmission. In the latter case use is preferably made of electron multipliers. The resulting currents at the receiving end produce a number of fluorescent record traces on the screen of a kinescope which is scanned in two directions and these traces are transferred to iconoscopes individual to the respective channels. To avoid waste of time while the scanning ray is moving from one record trace to the next, several kinescopeiconoscope groups may be arranged to work together as shown in Figs. 2 and 4. The voltage controlling the vertical deflection acts in the same way on all the iconscopes but that controlling the horizontal deflection becomes effective on each of them in turn owing to the effect of initial bias voltages provided by a potential divider. Transmission may be effected by carrier waves of a length of a few centimetres.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE475239X | 1937-01-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB475239A true GB475239A (en) | 1937-11-16 |
Family
ID=3870228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6080/37A Expired GB475239A (en) | 1937-01-16 | 1937-03-01 | Improvements in multiplex telephony and the like |
Country Status (3)
Country | Link |
---|---|
US (1) | US2191565A (en) |
BE (1) | BE419523A (en) |
GB (1) | GB475239A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2513335A (en) * | 1944-11-25 | 1950-07-04 | Standard Telephones Cables Ltd | Demodulator system |
US2564419A (en) * | 1947-04-14 | 1951-08-14 | Bell Telephone Labor Inc | Time division multiplex system for signals of different band width |
US2719879A (en) * | 1950-02-20 | 1955-10-04 | Telefonbau & Normalzeit Gmbh | Telecommunication device |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2437027A (en) * | 1943-01-12 | 1948-03-02 | John H Homrighous | Time division multiplex communication system |
US2434697A (en) * | 1943-09-28 | 1948-01-20 | Charles H Homrighous | Time division multiplex telephone system |
US2595691A (en) * | 1943-10-05 | 1952-05-06 | Bell Telephone Labor Inc | Signal responsive circuit |
US2508408A (en) * | 1943-10-11 | 1950-05-23 | Sidney H Liebson | Averaging indicator |
US2628274A (en) * | 1944-06-27 | 1953-02-10 | John H Homrighous | Multiplex television system |
US2501791A (en) * | 1944-08-10 | 1950-03-28 | Stanolind Oil & Gas Co | Inkless recorder |
US2510070A (en) * | 1945-05-18 | 1950-06-06 | Farnsworth Res Corp | Television scanning system |
US2588380A (en) * | 1945-08-03 | 1952-03-11 | Jr William W Cargill | Method and apparatus for transmitting intelligence by radio waves |
US2483411A (en) * | 1945-12-19 | 1949-10-04 | Standard Telephones Cables Ltd | Pulse synthesizing system |
US2538869A (en) * | 1946-03-14 | 1951-01-23 | Hartford Nat Bank & Trust Co | Stereophonic sound |
US2459131A (en) * | 1946-09-24 | 1949-01-11 | Rca Corp | Electronic distributor for multiplex pulse communication systems |
FR957221A (en) * | 1946-12-17 | 1950-02-17 | ||
US2559661A (en) * | 1947-04-02 | 1951-07-10 | Int Standard Electric Corp | Multichannel electrical pulse communication system |
US2515339A (en) * | 1947-06-27 | 1950-07-18 | Bell Telephone Labor Inc | Three coordinate indicating system for radar apparatus |
US2517265A (en) * | 1947-07-18 | 1950-08-01 | Wald George | Multichannel television system |
US2587005A (en) * | 1947-10-29 | 1952-02-26 | Rca Corp | Signal conversion system |
US2653184A (en) * | 1948-01-03 | 1953-09-22 | American Optical Corp | Transmission of picture and sound on the same carrier |
US2579269A (en) * | 1948-03-31 | 1951-12-18 | Rca Corp | Delay device |
US2608617A (en) * | 1950-06-14 | 1952-08-26 | Bell Telephone Labor Inc | Television converter system |
US3097262A (en) * | 1956-03-06 | 1963-07-09 | Uniscan Electronics Corp | Anamorphotic television system |
NL262235A (en) * | 1960-03-28 | |||
US3275746A (en) * | 1962-12-11 | 1966-09-27 | Beltrami Aurelio | Simultaneous multiple two-way multiplex communications systems |
US3180932A (en) * | 1963-02-19 | 1965-04-27 | Gen Precision Inc | Equal-area simultaneous display of remotely located television cameras' signals on a single monitor screen and synchronization of same |
US4691312A (en) * | 1984-08-10 | 1987-09-01 | Itt Gilfillan, A Division Of Itt Corporation | Data transmission system |
-
0
- BE BE419523D patent/BE419523A/xx unknown
-
1937
- 1937-03-01 GB GB6080/37A patent/GB475239A/en not_active Expired
-
1938
- 1938-01-15 US US185224A patent/US2191565A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2513335A (en) * | 1944-11-25 | 1950-07-04 | Standard Telephones Cables Ltd | Demodulator system |
US2564419A (en) * | 1947-04-14 | 1951-08-14 | Bell Telephone Labor Inc | Time division multiplex system for signals of different band width |
US2719879A (en) * | 1950-02-20 | 1955-10-04 | Telefonbau & Normalzeit Gmbh | Telecommunication device |
Also Published As
Publication number | Publication date |
---|---|
BE419523A (en) | |
US2191565A (en) | 1940-02-27 |
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