GB811467A - Improvements in transmitters for inductive signalling systems - Google Patents
Improvements in transmitters for inductive signalling systemsInfo
- Publication number
- GB811467A GB811467A GB1980056A GB1980056A GB811467A GB 811467 A GB811467 A GB 811467A GB 1980056 A GB1980056 A GB 1980056A GB 1980056 A GB1980056 A GB 1980056A GB 811467 A GB811467 A GB 811467A
- Authority
- GB
- United Kingdom
- Prior art keywords
- loop
- inductive
- tuning
- oscillator
- relays
- 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
- 230000001939 inductive effect Effects 0.000 title abstract 4
- 230000011664 signaling Effects 0.000 title abstract 3
- 238000009434 installation Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Abstract
811,467. Inductive signalling. MULTITONE ELECTRIC CO. Ltd. June 24, 1957 [June 26, 1956], No. 19800/56. Class 40 (5). In an audio-frequency inductive selective signalling system, comprising a plurality of receivers and a transmitter, both the oscillator and the inductive loop are simultaneously tunable to one of a plurality of frequencies, the tuning of the loop being initially adjusted according to its inductance, which differs with each individual installation. At the transmitter the oscillator circuit, Fig. 2, is selectively tuned by manual operation of switches M, N, P, T, which selectively energize one or more of relays X, Y, Z to operate contacts Y1, Y2, Z1, Z2, X, Fig. 1, to tune the loop L5. The tuning of the loop L5 is initially adjusted by manually operated switch S1, S2. In the oscillator frequencies intermediate to those selected by M, N, P, T may be obtained by manual operation of switches H, J, K, F which also energize one or other of relays WQ to close contacts W1, Q1, Fig. 1, and modify the tuning of the loop.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1980056A GB811467A (en) | 1956-06-26 | 1956-06-26 | Improvements in transmitters for inductive signalling systems |
| DEM34569A DE1103992B (en) | 1956-06-26 | 1957-06-25 | Transmitter for delivering low or intermediate frequency signals in an inductive loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1980056A GB811467A (en) | 1956-06-26 | 1956-06-26 | Improvements in transmitters for inductive signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB811467A true GB811467A (en) | 1959-04-08 |
Family
ID=10135429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1980056A Expired GB811467A (en) | 1956-06-26 | 1956-06-26 | Improvements in transmitters for inductive signalling systems |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1103992B (en) |
| GB (1) | GB811467A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1152152B (en) * | 1960-04-25 | 1963-08-01 | Emt Geraetewerk Lahr W Franz K | Arrangement for message transmission from a stationary main station to several substations with the possibility of acknowledgment to the main station |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2063248A (en) * | 1927-05-05 | 1936-12-08 | Rca Corp | Frequency changer |
| US2186068A (en) * | 1938-06-07 | 1940-01-09 | Bendix Radio Corp | Radio transmitter |
| US2438116A (en) * | 1940-04-16 | 1948-03-23 | Dodds John Mathieson | Unicontrolled transmitter tuning and antenna switching arrangement |
-
1956
- 1956-06-26 GB GB1980056A patent/GB811467A/en not_active Expired
-
1957
- 1957-06-25 DE DEM34569A patent/DE1103992B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1103992B (en) | 1961-04-06 |
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