GB412732A - Improvements in or relating to multiplex telegraph systems - Google Patents
Improvements in or relating to multiplex telegraph systemsInfo
- Publication number
- GB412732A GB412732A GB10962/33A GB1096233A GB412732A GB 412732 A GB412732 A GB 412732A GB 10962/33 A GB10962/33 A GB 10962/33A GB 1096233 A GB1096233 A GB 1096233A GB 412732 A GB412732 A GB 412732A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- pulses
- signals
- vibrator
- channel
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
- H04L13/02—Details not particular to receiver or transmitter
- H04L13/10—Distributors
- H04L13/12—Non-mechanical distributors, e.g. relay distributors
- H04L13/14—Electronic distributors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
- H04L5/24—Arrangements affording multiple use of the transmission path using time-division multiplexing with start-stop synchronous converters
- H04L5/245—Arrangements affording multiple use of the transmission path using time-division multiplexing with start-stop synchronous converters with a number of discharge tubes or semiconductor elements which successively connect the different channels to the transmission channels
Abstract
412,732. Diplex telegraphy. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London.- (Assignees of Mathes, R. E. ; 755, Belvidere Avenue, Westfield, New Jersey, U.S.A.) April 12, 1933, No. 10962. Convention date, April 13, 1932. [Classes 40 (iii) and 40 (v).] In a diplex line or wireless telegraph system using morse or like code characters of unequal length, the first half of each dot period is allotted to one channel and the second half to the other. Two automatic transmitters feed an aerial through a distributer which allocates the line time accordingly (Figs. 1, 2, not shown). At the receiver the block signals a are rectified by the valve 20 as at b and produce pulses as at c through a valve 25 and shaping and delay circuit 22, 23, to synchronize the multi-vibrator which produces continuous impulses as at d. These impulses are applied to valves 26, 27 of the first channel through condensers which shape them into pulses as shown at h, f. The valve 26 is biassed as at h to respond to the pulses so that, in the absence of marking signals, it takes control of the flip-flop device 28, and spacing polarity is consequently applied as at j2, j4 to the receiving-apparatus R of the first channel. The valve 27, on the other hand, receives the combined effects g of the vibrator pulses f from the conductor 37 and signals c from the valve 29, and is biassed as at f so that it cannot respond to vibrator pulses f alone or to signal impulses c alone, but can respond to combinations such as gl, g3, of these two. The circuit constants are such that the received signals paralyze valve 25 and so act upon the grid of valve 27 by removing the negative voltage-drop from resistance 30 upon blockage of valve 29. When valve 27 responds it overpowers the effect of the valve 26 and takes control of the flip-flop 28, so that a marking signal is sent to the apparatus R ; and since the impulses f, h are so timed that the apparatus is receptive during only the first half of each dot period, the signals at R are prolonged to full length as at j. Inductance 23 delays the pulses c so as to give the signals time to attain a steady state. The second channel is fed through the leads 38, 39, and is receptive during the second half of each dot period under the control of the same multi-vibrator 35.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US694927A US1979484A (en) | 1932-04-13 | 1932-04-13 | Communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB412732A true GB412732A (en) | 1934-07-05 |
Family
ID=24790832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10962/33A Expired GB412732A (en) | 1932-04-13 | 1933-04-12 | Improvements in or relating to multiplex telegraph systems |
Country Status (5)
Country | Link |
---|---|
US (1) | US1979484A (en) |
BE (1) | BE397368A (en) |
DE (1) | DE607019C (en) |
GB (1) | GB412732A (en) |
NL (1) | NL38488C (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2419292A (en) * | 1947-04-22 | System fob transmitting two | ||
US2591677A (en) * | 1940-10-11 | 1952-04-08 | Claud E Cleeton | Pulse group system of communications |
US2551103A (en) * | 1941-05-23 | 1951-05-01 | Ibm | Electronic trigger |
US2489303A (en) * | 1942-04-06 | 1949-11-29 | Lifschutz Harold | Counter frequency divider without time delay |
US2568265A (en) * | 1943-03-18 | 1951-09-18 | Luis W Alvarez | Radio beacon and system utilizing it |
US2717960A (en) * | 1943-03-18 | 1955-09-13 | Luis W Alvarez | Coded pulse generating circuit |
US2614210A (en) * | 1944-05-18 | 1952-10-14 | Rca Corp | Pulsed radio signaling |
US3384705A (en) * | 1944-08-29 | 1968-05-21 | Rosen Leo | Facsimile privacy apparatus |
US2513525A (en) * | 1944-12-01 | 1950-07-04 | Rca Corp | Locking circuit with double signal control |
US2489852A (en) * | 1944-12-04 | 1949-11-29 | Gen Electric | Electronic trigger pulse generator |
US2513910A (en) * | 1945-03-28 | 1950-07-04 | Rca Corp | Multiplex telegraph system |
US2511093A (en) * | 1945-09-26 | 1950-06-13 | Rca Corp | Triggering circuit |
US2951987A (en) * | 1945-11-14 | 1960-09-06 | Conrad L Longmire | Constant delay circuit |
US2658196A (en) * | 1945-11-19 | 1953-11-03 | Burnight Thomas Robert | Synchronizing system |
US2666852A (en) * | 1946-04-02 | 1954-01-19 | Lowell M Hollingsworth | Variable frequency multivibrator |
US2847667A (en) * | 1946-04-12 | 1958-08-12 | Chalmers W Sherwin | Synchronization system |
US2536816A (en) * | 1946-05-29 | 1951-01-02 | Stromberg Carlson Co | Pulse generator |
US2567977A (en) * | 1946-08-24 | 1951-09-18 | Bendix Aviat Corp | Electric trip circuit |
US2567742A (en) * | 1946-09-24 | 1951-09-11 | Howard P Stabler | Triggered square wave voltage generator |
FR965210A (en) * | 1947-10-07 | 1950-09-06 | ||
US2542152A (en) * | 1947-10-21 | 1951-02-20 | Times Facsimile Corp | Signal inverter for facsimile recording |
US2577015A (en) * | 1949-03-22 | 1951-12-04 | Earle C Anthony Inc | Switching system |
BE503354A (en) * | 1950-05-18 | |||
US2819397A (en) * | 1955-06-17 | 1958-01-07 | Henry B O Davis | Voltage comparator |
US2990444A (en) * | 1957-12-12 | 1961-06-27 | Stelma Inc | Data counter |
-
0
- BE BE397368D patent/BE397368A/xx unknown
- NL NL38488D patent/NL38488C/xx active
-
1932
- 1932-04-13 US US694927A patent/US1979484A/en not_active Expired - Lifetime
-
1933
- 1933-04-12 GB GB10962/33A patent/GB412732A/en not_active Expired
- 1933-04-14 DE DER87755D patent/DE607019C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE607019C (en) | 1934-12-17 |
NL38488C (en) | |
US1979484A (en) | 1934-11-06 |
BE397368A (en) |
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