GB366644A - Improvements relating to electric selectors - Google Patents
Improvements relating to electric selectorsInfo
- Publication number
- GB366644A GB366644A GB36606/30A GB3660630A GB366644A GB 366644 A GB366644 A GB 366644A GB 36606/30 A GB36606/30 A GB 36606/30A GB 3660630 A GB3660630 A GB 3660630A GB 366644 A GB366644 A GB 366644A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- relay
- mark
- circuit
- over
- 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
- H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
- H04L15/24—Apparatus or circuits at the receiving end
- H04L15/26—Apparatus or circuits at the receiving end operating only on reception of predetermined code signals, e.g. distress signals, party-line call signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Emergency Alarm Devices (AREA)
- Alarm Systems (AREA)
- Relay Circuits (AREA)
Abstract
366,644. Selectors responsive to code signals. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, and HUMPHRIES, H. E., 47A, Lewisham Hill, both in London. Dec. 4, 1930, No. 36606. Addition to 334,205, [Class 40 (iv), Telephones &c.] [Class 40 (iv).] The selector described in the parent Specification is modified by using (1) a step-by-step switch to count the beats of the selfinterrupting relay device for measuring the marks, (2) a second switch or a relay chain to count the beats of another relay device to measure the spaces, and (3) a further switch or relay chain to close an alarm circuit if the signal is correct. The switches may be those known as "minor" switches in automatic telephony. A modified form of self-interrupting relay device is also described. Relay interrupter U, Y, Z. With the circuits in the condition shown (during a mark period), U(iii) is short-circuited to make it sluggish Y(i) energizes to complete a circuit for U(i) and also prepare a circuit for Z(i) over Y(i) which becomes operative when U pulls up. Z opens the circuit of U which falls back slowly. The windings of Y are now operating differentially so that Y falls back and U(ii) pulls up slowly. Z, which has held over Z(ii), releases and U again falls back slowly. The circuits are again in the condition shown and the cycle is repeated. The relay characteristics are adjusted so that the duration of a cycle is just less than half a second. Relay U is alternately energized over (i) and (ii) wound in opposite direction to prevent remanent magnetism. At the end of the period to be measured the short-circuit about U(iii) is removed and the combination quickly restores to normal. First mark; measurement by switch A. This mark is of 4 seconds' duration but the selector tolerates a mark lying between 3¢ and 5¢ seconds. On receipt of the mark, relay S in the output circuit of a wireless receiver falls back and short-circuits normally energized relay SA to start the interrupter U, Y, Z. The stepping magnet AM of switch A operates on each energization of Y. If the mark endures for 3¢ seconds, magnet BM of the recording switch B operates over A1 and seventh contact and the switch takes a step, but if it endures for 5¢ seconds the switch B is released by magnet BR operated over eleventh contacts. When the mark ceases, release magnet AR restores switch A. First space. The spaces are of not less than one-fifth of a second and not longer than 1¢ seconds' duration. Magnet CM of the space switch C received an impulse over A3 during the seventh cycle, so that when SA operates on cessation of the mark, X(i) pulls up and C takes another step. X(ii) energizes and opposes the flux due to (X)i, which is now open-circuited, whereby a release and reoperation of X occurs and C takes a further step. The stepping continues for the maximum allowable period of the space, independent of the condition of relay SA, until W(i) pulls up, completes a series circuit for W(ii), and release magnet CM so that switch C restores and W falls back. If the space has not terminated, switch B is released over BR, C3, B2, sa1 (operated). Subsequent marks ; completion of alarm circuit. The second and third marks are timed like the first and if correct L operates over B1 which has taken three steps and A2 which has restored to normal. Relay L opens the shortcircuit about SA so that further signals are ineffective, and closes the circuit of alarm AB. If the second mark is too short, switch C will not take its initial step so that when the mark ceases, switch B will be released over the circuit described in the last sentence of the preceding paragraph. Re-setting. After receipt of a correct signal, switches A and C are normal and B in the position described in the preceding paragraph. Closure of re-set key RK operates release magnet BR to restore B which releases L. Faults. If a valve filament fails, a relay may be released to complete a connection over x for the alarm AB.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB13229/29A GB334205A (en) | 1930-12-04 | 1929-04-29 | Improvements relating to electric selectors |
GB20312/30A GB334516A (en) | 1930-12-04 | 1929-04-29 | An improved device for the periodic opening or closing of an electric circuit |
FR694634D FR694634A (en) | 1930-12-04 | 1930-04-28 | Improvements to electric selectors |
GB36606/30A GB366644A (en) | 1930-12-04 | 1930-12-04 | Improvements relating to electric selectors |
GB4995/31A GB372435A (en) | 1930-12-04 | 1931-02-17 | An improved device for the periodic opening or closing of an electric circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB36606/30A GB366644A (en) | 1930-12-04 | 1930-12-04 | Improvements relating to electric selectors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB366644A true GB366644A (en) | 1932-02-11 |
Family
ID=10389654
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13229/29A Expired GB334205A (en) | 1930-12-04 | 1929-04-29 | Improvements relating to electric selectors |
GB20312/30A Expired GB334516A (en) | 1930-12-04 | 1929-04-29 | An improved device for the periodic opening or closing of an electric circuit |
GB36606/30A Expired GB366644A (en) | 1930-12-04 | 1930-12-04 | Improvements relating to electric selectors |
GB4995/31A Expired GB372435A (en) | 1930-12-04 | 1931-02-17 | An improved device for the periodic opening or closing of an electric circuit |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13229/29A Expired GB334205A (en) | 1930-12-04 | 1929-04-29 | Improvements relating to electric selectors |
GB20312/30A Expired GB334516A (en) | 1930-12-04 | 1929-04-29 | An improved device for the periodic opening or closing of an electric circuit |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4995/31A Expired GB372435A (en) | 1930-12-04 | 1931-02-17 | An improved device for the periodic opening or closing of an electric circuit |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR694634A (en) |
GB (4) | GB334205A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE972799C (en) * | 1937-11-24 | 1959-09-24 | Siemens Ag | Relay arrangement |
US2436787A (en) * | 1942-06-05 | 1948-03-02 | Standard Telephones Cables Ltd | Arrangement for producing electric impulses |
-
1929
- 1929-04-29 GB GB13229/29A patent/GB334205A/en not_active Expired
- 1929-04-29 GB GB20312/30A patent/GB334516A/en not_active Expired
-
1930
- 1930-04-28 FR FR694634D patent/FR694634A/en not_active Expired
- 1930-12-04 GB GB36606/30A patent/GB366644A/en not_active Expired
-
1931
- 1931-02-17 GB GB4995/31A patent/GB372435A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB372435A (en) | 1932-05-12 |
FR694634A (en) | 1930-12-05 |
GB334516A (en) | 1930-08-29 |
GB334205A (en) | 1930-08-29 |
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