GB417725A - Improvements in or relating to wireless signalling - Google Patents
Improvements in or relating to wireless signallingInfo
- Publication number
- GB417725A GB417725A GB1081933A GB1081933A GB417725A GB 417725 A GB417725 A GB 417725A GB 1081933 A GB1081933 A GB 1081933A GB 1081933 A GB1081933 A GB 1081933A GB 417725 A GB417725 A GB 417725A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- super
- transformer
- relay
- interrupted
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/022—Selective call receivers
- H04W88/025—Selective call decoders
- H04W88/027—Selective call decoders using frequency address codes
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
417,725. Valve circuits. MONTEAVARO, G., 20, Venour Road, Mile End, London. April 11, 1933, No. 10819. [Class 40 (v).] A super-regenative receiver is used in conjunction with a transmitter which sends a carrier interrupted at 100 cycles per second for the purpose of operating a calling-device. The super-regenerative receiver has a frame aerial A, is back-coupled through a transformer T, and has tuned circuits C3, C4, which are coupled together and produce the required quenching. The circuit C5 is tuned to the same frequency as that at which the carrier is interrupted and feeds a valve V2 which controls the relay R. The valve V2 may be biassed to the bottom bend of its characteristic and the variations in the D.C. component of its anode current may control the relay R (Fig. 2, not shown). Alternatively the change in anode current may be intensified by the use of a transformer T1 feeding back through a rectifier R2, Fig. 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1081933A GB417725A (en) | 1933-04-11 | 1933-04-11 | Improvements in or relating to wireless signalling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1081933A GB417725A (en) | 1933-04-11 | 1933-04-11 | Improvements in or relating to wireless signalling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB417725A true GB417725A (en) | 1934-10-11 |
Family
ID=9974869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1081933A Expired GB417725A (en) | 1933-04-11 | 1933-04-11 | Improvements in or relating to wireless signalling |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB417725A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2459675A (en) * | 1941-04-05 | 1949-01-18 | Motorola Inc | Interference reducing radio receiver |
-
1933
- 1933-04-11 GB GB1081933A patent/GB417725A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2459675A (en) * | 1941-04-05 | 1949-01-18 | Motorola Inc | Interference reducing radio receiver |
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