GB393327A - Improvements in or relating to electrical signalling systems - Google Patents
Improvements in or relating to electrical signalling systemsInfo
- Publication number
- GB393327A GB393327A GB3405331A GB3405331A GB393327A GB 393327 A GB393327 A GB 393327A GB 3405331 A GB3405331 A GB 3405331A GB 3405331 A GB3405331 A GB 3405331A GB 393327 A GB393327 A GB 393327A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- circuit
- relays
- tuned
- chain
- 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
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Toys (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
393,327. Electric signalling systems. AUTOMATIC ELECTRIC CO., Ltd., Strowger Works, TERRONI, T. B. D., 20, Staplands Road, Broadgreen, and TURTON, G. D., 48, Church Road, Stanley, all in Liverpool. Dec. 8, 1931, No. 34053. [Class 40, (i).] In a signalling system employing alternating current of a plurality of different frequencies, the receiver is tuned in turn to the various frequencies and a common responding relay energizes as the circuit is tuned to the various components of the incoming signal and controls the energization of particular relays of a relay group. The tuning of the circuit is effected by a relay chain. When a signal is received over 1, 2, relay X responds and relays A-E energize. When E pulls up it breaks the circuit of A and relays A-E fall away slowly in turn. When A energized the incoming signal was connected to the tuned circuit feeding valve V2 and the tuning of this circuit is altered as each relay of the chain A-E falls away. Assuming the signal contains the third and fourth frequencies of the series, when relay B falls away the tuned circuit responds to the incoming signal and Y operates. Relay C is held energized and relays Z and CC pull up in series, relay CC locking up to x and closing a circuit over, 17. Relay Z shorts out Y and C falls away. The circuit is now tuned to the fourth frequency and Y again energizes, holding D and allowing Z and DD to pull up. DD locks and closes a circuit over 18 and Z releases Y to allow the relay chain to complete its action. The energized relays CC and DD hold up until the received pulse terminates. The valve V3, controlling relay X, may be fed directly from the line circuit and tuning may be effected by a parallel, instead of a series, circuit or by variation of capacity. The relay chain could be replaced by a step-by-step switch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3405331A GB393327A (en) | 1931-12-08 | 1931-12-08 | Improvements in or relating to electrical signalling systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3405331A GB393327A (en) | 1931-12-08 | 1931-12-08 | Improvements in or relating to electrical signalling systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB393327A true GB393327A (en) | 1933-06-08 |
Family
ID=10360780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3405331A Expired GB393327A (en) | 1931-12-08 | 1931-12-08 | Improvements in or relating to electrical signalling systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB393327A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2437326A (en) * | 1944-11-10 | 1948-03-09 | Union Switch & Signal Co | Remote control system |
US2600405A (en) * | 1946-03-18 | 1952-06-17 | Conrad H Hoeppner | Selective communication system |
-
1931
- 1931-12-08 GB GB3405331A patent/GB393327A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2437326A (en) * | 1944-11-10 | 1948-03-09 | Union Switch & Signal Co | Remote control system |
US2600405A (en) * | 1946-03-18 | 1952-06-17 | Conrad H Hoeppner | Selective communication system |
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