GB443986A - Improvements in or relating to manual exchanges for use with teleprinting systems - Google Patents
Improvements in or relating to manual exchanges for use with teleprinting systemsInfo
- Publication number
- GB443986A GB443986A GB82/35A GB8235A GB443986A GB 443986 A GB443986 A GB 443986A GB 82/35 A GB82/35 A GB 82/35A GB 8235 A GB8235 A GB 8235A GB 443986 A GB443986 A GB 443986A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- signals
- contact
- exchange
- contacts
- 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
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/04—Switchboards
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Alarm Systems (AREA)
Abstract
443,986. Telegraph exchange systems. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. Jan. 1, 1935, No. 82. Convention date, Jan. 31, 1934. [Class 40 (iii)] Supervisory signals are given by sending impulse combinations corresponding to predetermined pairs of characters, particularly in a system in which a trunk line is allocated by a manualexchange operator or in which audio - frequency lines have to be connected to directcurrent lines. Relays in the one-way cord circuits at the exchange control means for indicating the origin of the supervisory signals. Lay-out of exchange system.-The invention is described as applied to a system, Fig. 1 (not shown), in which a manual exchange is connected to an automatic telegraph exchange for subscribers using D.C. signals and to a telephone exchange for subscribers using both telephonic and audio-frequency telegraphic communication. The Figure shows a connection at the manual exchange between a telephonic and audio-frequency telegraphic trunk FSL and a D.C. trunk FTL. Audio-frequency signals arriving at the jack FKL are converted to D.C. signals by the repeater US located in the operators cord circuit, and the converse operation is effected by the repeater US for signals travelling in the opposite direction. The operator has a receiving relay C, D, in each direction of traffic, and the corresponding contacts c, d, operate his printer relay EM. He also has a transmitting contact a, b, in each direction of traffic, and these contacts are controlled by his transmitter contact sk. Supervisory signals. These are given by lamp LW for signals travelling in the direction of the arrow W and by lamp LO for signals in the direction O. When the clearing signal is given, signals denoting a particular pair of characters are sent and are passed on by relay C or relay D, as the case may be, to the magnet EM of the operator's printer. The type-bars corresponding to the pair of characters in question are modified, Fig. 3 (not shown), so that they may operate the pair of contacts K1, K3, besides typing the characters which they bear. Through contact Kl the sluggish relay Z is energized and prepares at z a circuit through contact K3. Meanwhile slow-release relay W has pulled up through contact c, and consequently relay SW pulls up through contact w2, holding on through its winding II and contact sw2, while it lights the clearing lamp LW through sw1. Similarly if a clearing signal is given in the O channel the contacts K1, K3 are again closed, but the lamp is lighted by means of hold-on relay SO. The origin of the signal can be detected by opening the distinguishing- key LTO or LTW to break the circuit of the energized relay SW or SO. A flicker signal is similarly sent by a different pair of impulsecombinations which select the key contacts K1, K2 and cause the relay FLW or FLO to pull up and hold on. Windings I, II and corresponding contacts 1, 2, are so arranged that when this occurs the circuit of the lamp LW or LO is intermittently interrupted. The arrangement may be such that the impulse combination has to be repeated a number of times before the indicator circuits respond. The signals may be received from a startstop repeater.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE443986X | 1934-01-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB443986A true GB443986A (en) | 1936-03-11 |
Family
ID=6532778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB82/35A Expired GB443986A (en) | 1934-01-31 | 1935-01-01 | Improvements in or relating to manual exchanges for use with teleprinting systems |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE407043A (en) |
GB (1) | GB443986A (en) |
NL (1) | NL41309C (en) |
-
0
- BE BE407043D patent/BE407043A/xx unknown
- NL NL41309D patent/NL41309C/xx active
-
1935
- 1935-01-01 GB GB82/35A patent/GB443986A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE407043A (en) | |
NL41309C (en) |
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