GB600252A - Synchronising arrangements for multiplex electric pulse communication systems - Google Patents
Synchronising arrangements for multiplex electric pulse communication systemsInfo
- Publication number
- GB600252A GB600252A GB19192/44A GB1919244A GB600252A GB 600252 A GB600252 A GB 600252A GB 19192/44 A GB19192/44 A GB 19192/44A GB 1919244 A GB1919244 A GB 1919244A GB 600252 A GB600252 A GB 600252A
- Authority
- GB
- United Kingdom
- Prior art keywords
- channel
- signals
- synchronizing
- valve
- line
- 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
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000007493 shaping process Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
- H04J3/0617—Systems characterised by the synchronising information used the synchronising signal being characterised by the frequency or phase
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B13/00—Generation of oscillations using deflection of electron beam in a cathode-ray tube
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/04—Distributors combined with modulators or demodulators
- H04J3/045—Distributors with CRT
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Near-Field Transmission Systems (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
600,252. Thermionic distributers. STANDARD TELEPHONES & CABLES, Ltd. Oct. 6, 1944, No. 19192. Convention date, Dec. 20, 1943. [Class 40 (iii)] [Also in Group XL (c)] In a multiplex pulse communication system, a synchronizing signal is superimposed on one of the signal channels. Separating means, provided at the receiving terminal for each channel, are controlled by an oscillator of free frequency rather less than the repetition frequency of one channel. The synchronizing signal is selected from the output of one channel by a filter and is applied to maintain in synchronism the controlling oscillator. Signals from the lines 10 &c., Fig. 1, pass via hybrid coils 14 to channel modulators 18 operated in sequence by pulses derived from the source 23 over phase-adjusters 24. One modulator 18 is also supplied with synchronizing signals from the source 22. In the receiver the interlaced channels are separated by selectors 34, demodulated signals from the detectors 30 passing to the lines 52 via hybrid coils 48. The detector 30 in one channel is provided with a filter 42 which passes the synchronizing signal to lock the generator 38. Pulses from the generator 38, which may be a multivibrator, are applied over delay networks 39 to operate the channel selectors 34. Pulses are also applied to control the wave generator 43 supplying demodulating signals to the detectors 30 via phase-shifters 44. A stop filter 56 prevents synchronizing signals from reaching the line 52. In an alternative arrangement, in which the detectors 30 include individual demodulating means, the source 43 and phaseshifters 44 may be omitted. Channel modulator for pulse time-modulated waves (Fig. 2). Signals from the line 60 pass to the grid of the valve 71 via the synchronizing frequency stop filter 61. A synchronizing signal is applied to the valve 72 from the line 62, combined signals appearing in the coils 76 of the modulating transformer. Control waves are applied to the coil 78, the modulated waves appearing in the coils 80, 81 being applied to the rectifiers 82, 83. The output from the valves 82, 83 is combined, and passed over the shaping circuit 89 to the line. In the channels not carrying superimposed synchronizing signals the valve 72 may be omitted. Specification 600,244, [Group XL (c)], is referred to. Channel selector (Fig. 3) (34 of Fig. 1). Signals from'the line 28 are applied to the overbiassed valve 100. Gating pulses from the generator 38 are applied to unblock the valve 100, the amplitude being determined by the limiter 105. Pulse time modulation detector. Pulses of the selected channel are applied to a grid of the valve 110, Fig. 3, a second grid being supplied with A.C. of a frequency which is a harmonic of that of the control wave. The detected signal passes to the hybrid coil 48, Fig. 1, over the pulse-frequency stop filter 111 and synchronizing frequency stop filter 56, synchronizing signals appearing on the line 112. In an alternative arrangement (Fig. 4, not shown), the second grid of the valve 110 is grounded through a tuned circuit in which the detecting wave is generated from the signal impulses. Specifications 520,448 and 600,291, [Group XL (c)], also are referred to. In a modified form of the invention, a receiving channel is caused to pick out any desired transmission channel, each receiving channel possessing its own selector wave generator and the desired transmission channel being modulated with the appropriate synchronizing signal. The invention may also be employed for the interception of any desired channel at an intermediate point in the line 28.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US514998A US2418116A (en) | 1943-12-20 | 1943-12-20 | Multiplex synchronizing system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB600252A true GB600252A (en) | 1948-04-05 |
Family
ID=24049573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19192/44A Expired GB600252A (en) | 1943-12-20 | 1944-10-06 | Synchronising arrangements for multiplex electric pulse communication systems |
Country Status (3)
Country | Link |
---|---|
US (1) | US2418116A (en) |
FR (2) | FR935522A (en) |
GB (1) | GB600252A (en) |
Families Citing this family (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2616977A (en) * | 1952-11-04 | Sheetsxsheet i | ||
US2565102A (en) * | 1941-03-15 | 1951-08-21 | Products & Licensing Corp | System for connecting a single channel with a plurality of channels in periodical succession |
US2406803A (en) * | 1941-12-16 | 1946-09-03 | Standard Telephones Cables Ltd | High-frequency electrical communication system |
BE472062A (en) * | 1943-10-19 | |||
US2485611A (en) * | 1944-04-07 | 1949-10-25 | Standard Telephones Cables Ltd | Broadcasting system |
US2516885A (en) * | 1944-04-17 | 1950-08-01 | Standard Telephones Cables Ltd | Relay system |
BE479412A (en) * | 1944-08-07 | |||
US2532719A (en) * | 1944-10-16 | 1950-12-05 | John H Homrighous | Dimensional radio communication system |
BE476038A (en) * | 1944-12-26 | |||
FR960543A (en) * | 1945-01-03 | 1950-04-20 | ||
US2511146A (en) * | 1945-03-13 | 1950-06-13 | Du Mont Allen B Lab Inc | Television receiver synchronizing |
US2451044A (en) * | 1945-07-09 | 1948-10-12 | Bell Telephone Labor Inc | Communication system employing pulse code modulation |
US2513308A (en) * | 1945-09-01 | 1950-07-04 | Standard Telephones Cables Ltd | Electrical time modulated pulse communication system |
US2520132A (en) * | 1945-11-14 | 1950-08-29 | Standard Telephones Cables Ltd | Electronic line finder system |
US2520170A (en) * | 1945-11-14 | 1950-08-29 | Standard Telephones Cables Ltd | Pulse responsive circuit |
US2643333A (en) * | 1945-11-29 | 1953-06-23 | Us Navy | Data transmission system |
NL77143C (en) * | 1945-12-11 | |||
BE478822A (en) * | 1946-03-02 | |||
BE472449A (en) * | 1946-04-10 | |||
US2485343A (en) * | 1946-04-20 | 1949-10-18 | Magnetic Analysis Corp | Multiple indicating system |
US2649540A (en) * | 1946-07-08 | 1953-08-18 | John H Homrighous | Multiplex radiophone communication system |
US2471138A (en) * | 1946-08-16 | 1949-05-24 | Gen Electric | Radio communication system |
US2589285A (en) * | 1946-09-11 | 1952-03-18 | Fed Telecomm Lab Inc | Communication system |
FR959010A (en) * | 1946-10-04 | 1950-03-23 | ||
US2537056A (en) * | 1946-11-13 | 1951-01-09 | Conrad H Hoeppner | Pulse multiplex system |
GB652357A (en) * | 1946-11-21 | 1951-04-25 | Gen Electric Co Ltd | Improvements in and relating to multi-channel signalling systems |
US2736772A (en) * | 1947-01-29 | 1956-02-28 | Burnight Thomas Robert | Pulse multiplex communication system |
US2724017A (en) * | 1947-01-29 | 1955-11-15 | Vernon L Heeren | Pulse multiplex communication systems |
US2570249A (en) * | 1947-03-29 | 1951-10-09 | Sperry Corp | Combining and separating circuits |
US2631194A (en) * | 1947-07-22 | 1953-03-10 | Int Standard Electric Corp | Telecommunication system |
US2527638A (en) * | 1947-09-26 | 1950-10-31 | Bell Telephone Labor Inc | Pulse skip synchronization of pulse transmission systems |
US2610295A (en) * | 1947-10-30 | 1952-09-09 | Bell Telephone Labor Inc | Pulse code modulation communication system |
US2723310A (en) * | 1947-11-10 | 1955-11-08 | Int Standard Electric Corp | Time multiplex system |
US2597038A (en) * | 1947-11-19 | 1952-05-20 | Int Standard Electric Corp | Two-way electric pulse communication system |
US2740893A (en) * | 1947-12-31 | 1956-04-03 | Bendix Aviat Corp | Chain oscillator in a multiplex system |
US2750566A (en) * | 1948-06-04 | 1956-06-12 | Raytheon Mfg Co | Telemetering transmission system |
NL106021C (en) * | 1948-12-24 | |||
US2613276A (en) * | 1949-01-07 | 1952-10-07 | John H Homrighous | Multiplex time division radiophone system |
US2680152A (en) * | 1949-01-14 | 1954-06-01 | Philco Corp | Pulse communication system |
US2680151A (en) * | 1949-01-14 | 1954-06-01 | Philco Corp | Multichannel communication system |
US2614218A (en) * | 1949-11-23 | 1952-10-14 | Collins Radio Co | Timing device |
US2683768A (en) * | 1950-02-01 | 1954-07-13 | Rca Corp | Multiplexing system synchronization |
US2685047A (en) * | 1950-02-25 | 1954-07-27 | Rca Corp | Color television electron beam deflection control system |
US2651677A (en) * | 1950-03-18 | 1953-09-08 | Int Standard Electric Corp | Electrical intercommunication system |
US2672517A (en) * | 1951-04-17 | 1954-03-16 | Western Union Telegraph Co | Pulse modulation phasing |
US2719189A (en) * | 1951-05-01 | 1955-09-27 | Bell Telephone Labor Inc | Prevention of interpulse interference in pulse multiplex transmission |
NL174273B (en) * | 1952-12-01 | Emmelot Galvanisch Bv | PROCESS FOR CORROSION PROTECTION OF CAST IRON OBJECTS. | |
US2769903A (en) * | 1953-06-23 | 1956-11-06 | Paxson Gordon Donald | Pulse forming network |
US2863124A (en) * | 1954-10-20 | 1958-12-02 | Sanders Associates Inc | Electromagnetic modulator |
US2967910A (en) * | 1955-05-25 | 1961-01-10 | Rca Corp | Pulse transmitter |
NL112284C (en) * | 1956-01-24 | |||
US3440657A (en) * | 1965-08-05 | 1969-04-22 | Gen Motors Corp | Multichannel multiplex communication system using pulse width modulation and an audio sync on one pulse |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2048081A (en) * | 1933-04-29 | 1936-07-21 | Alger S Riggs | Communication system |
US2105016A (en) * | 1936-01-02 | 1938-01-11 | Associated Electric Lab Inc | Telephone transmission system |
US2092442A (en) * | 1936-07-07 | 1937-09-07 | Colwell Robert Cameron | Communication system |
BE477832A (en) * | 1942-03-12 |
-
1943
- 1943-12-20 US US514998A patent/US2418116A/en not_active Expired - Lifetime
-
1944
- 1944-10-06 GB GB19192/44A patent/GB600252A/en not_active Expired
-
1946
- 1946-10-31 FR FR935522D patent/FR935522A/en not_active Expired
-
1947
- 1947-04-04 FR FR55322D patent/FR55322E/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2418116A (en) | 1947-04-01 |
FR935522A (en) | 1948-06-22 |
FR55322E (en) | 1952-01-02 |
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