GB412237A - A gas discharge device circuit arrangement for indicating signalling currents or the like - Google Patents
A gas discharge device circuit arrangement for indicating signalling currents or the likeInfo
- Publication number
- GB412237A GB412237A GB36360/32A GB3636032A GB412237A GB 412237 A GB412237 A GB 412237A GB 36360/32 A GB36360/32 A GB 36360/32A GB 3636032 A GB3636032 A GB 3636032A GB 412237 A GB412237 A GB 412237A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge device
- lamp
- relay
- dec
- gas discharge
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
412,237. Valve amplifying circuits. TELEFONAKTIEBOLAGET L. M. ERICSSON, 33, Kungsgatan, Stockholm. Dec. 22, 1932, No. 36360. Convention date, Dec. 24, 1931. [Class 40 (v).] A discharge device G having a falling characteristic is arranged to operate a relay D in a direct current circuit on the application of signal currents to an alternating current circuit comprising inductance L and capacity C and having a damping so related to the negative resistance of the discharge device as to be self-oscillatory, during a portion of each cycle. The glow discharge device is preferably a neon lamp with a voltage from the battery B applied to it a little below the lamp igniting voltage. A parallel resonant circuit may be connected across the input tuned to the signalling frequency, or, a transformer with tuned primary and secondary may be used to provide a band-pass filter. Fig. 6 shows the relay M arranged in one diagonal of a Wheatstone bridge so that the receipt of a signal breaks down neon lamp G1 which in turn causes the break down of a second lamp G2, which energizes relay M to opposite polarity to its energization through resistances R1, R2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE412237X | 1931-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB412237A true GB412237A (en) | 1934-06-22 |
Family
ID=20309569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36360/32A Expired GB412237A (en) | 1931-12-24 | 1932-12-22 | A gas discharge device circuit arrangement for indicating signalling currents or the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB412237A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2753494A (en) * | 1952-06-10 | 1956-07-03 | Kelman Electric And Mfg Compan | Time delay circuit breaker |
-
1932
- 1932-12-22 GB GB36360/32A patent/GB412237A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2753494A (en) * | 1952-06-10 | 1956-07-03 | Kelman Electric And Mfg Compan | Time delay circuit breaker |
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