GB526501A - Improvements in or relating to impulse responding circuits - Google Patents
Improvements in or relating to impulse responding circuitsInfo
- Publication number
- GB526501A GB526501A GB8636/39A GB863639A GB526501A GB 526501 A GB526501 A GB 526501A GB 8636/39 A GB8636/39 A GB 8636/39A GB 863639 A GB863639 A GB 863639A GB 526501 A GB526501 A GB 526501A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- energized
- current
- valve
- received
- 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
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/06—Demodulator circuits; Receiver circuits
-
- 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
Abstract
526,501. Valve relays. ASSOCIATED ELECTRIC LABORATORIES, Inc. March 17, 1939, No. 8636. Convention date, March 19, 1938. [Class 40 (v)] An impulse responding circuit includes a relay in the anode circuit of a valve so biased about the lower bend of the anode current grid voltage characteristic that the relay winding normally carries current but means are provided to ensure its release when no alternating current impulses are being received. The received signals are repeated by a relay energized by a condenser discharge so that the repeated signals are of constant duration. The relay 22 is normally held in the de-energized condition by current flowing from +B over 23, 22 and 28 to -B. When a signal is received current also flows in opposition to this from +B through valve 15, relay 22 and 26 to -B and the armature 29 moves to make contact 31. Condenser 32, which has been charging over 35, 36, is discharged through relay 14 and this relay energizes to close contacts 13 and repeat the signal over 12. The impedance of relay 14 and the capacities of condensers 32 and 38 are adjusted so that relay 14 remains energized for the same time interval no matter for how long the relay 22 is energized.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US196919A US2181972A (en) | 1938-03-19 | 1938-03-19 | Control apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB526501A true GB526501A (en) | 1940-09-19 |
Family
ID=22727285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8636/39A Expired GB526501A (en) | 1938-03-19 | 1939-03-17 | Improvements in or relating to impulse responding circuits |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2181972A (en) |
| GB (1) | GB526501A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2714632A (en) * | 1949-12-20 | 1955-08-02 | Bell Telephone Labor Inc | Ringing generator and interrupter using electron tubes |
-
1938
- 1938-03-19 US US196919A patent/US2181972A/en not_active Expired - Lifetime
-
1939
- 1939-03-17 GB GB8636/39A patent/GB526501A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2714632A (en) * | 1949-12-20 | 1955-08-02 | Bell Telephone Labor Inc | Ringing generator and interrupter using electron tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| US2181972A (en) | 1939-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB556511A (en) | Improvements in and relating to time delay electric relays | |
| GB526501A (en) | Improvements in or relating to impulse responding circuits | |
| US1647270A (en) | System for indicating frequency changes | |
| US2515599A (en) | Arrangement coupling either of two electrical devices to a load upon a disturbance in the other device | |
| US2362570A (en) | Operating device for impulse-controlled instruments | |
| GB626905A (en) | Timing circuit, using a grid-controlled electron tube | |
| GB522986A (en) | Improvements in electrical relays | |
| SU95414A1 (en) | Electromagnetic Relay Counter | |
| US1911133A (en) | Self-biasing relay circuit | |
| GB505500A (en) | Improvements in or relating to non-linear thermionic valve stages | |
| US2542998A (en) | Matched potential control system | |
| GB468040A (en) | Improvements in or relating to electric summating apparatus | |
| GB519688A (en) | A centrally controlled electrical alarm device | |
| GB190450A (en) | Telegraph recorder-relay | |
| SU28870A1 (en) | Electrical distance signaling device | |
| GB484892A (en) | Electromagnetic relay circuits | |
| GB467867A (en) | Improvements in or relating to telephone and like signalling systems | |
| GB299295A (en) | A system of connections for telephone installations | |
| GB548445A (en) | Improvements relating to electromagnetic relays | |
| GB293747A (en) | A circuit arrangement for the transmission of messages over telephone lines | |
| GB466392A (en) | Improvements in and relating to electric relay apparatus | |
| GB516429A (en) | Improvements in or relating to electro-magnetic relays | |
| GB785894A (en) | Improvements in or relating to electrical circuits of the kind including an electro-magnetic device | |
| GB391742A (en) | Improvements in and relating to circuits for electric relays | |
| GB741939A (en) | Improvements in or relating to electric timing apparatus |