US1795295A - Telephone system - Google Patents
Telephone system Download PDFInfo
- Publication number
- US1795295A US1795295A US452417A US45241730A US1795295A US 1795295 A US1795295 A US 1795295A US 452417 A US452417 A US 452417A US 45241730 A US45241730 A US 45241730A US 1795295 A US1795295 A US 1795295A
- Authority
- US
- United States
- Prior art keywords
- relay
- over
- line
- contact
- lines
- 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 - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
Definitions
- 'llhe invention relates to a circuit arrangement for automatic telephone systems, in which lines of different length are-connected together over selecting devices.
- lt' is known l that the long lines have a greater damping together.
- the object of the invention is to effeet in an entirely automatic and suitable manner the switching in of the ampliers in those cases where this insertion of amplifiers is necessary; and according to the insitloned, switching means come into action that determine, according to the incoming -and outgoing lines, whether an amplifier is to be inserted in the interconnected lines or Whether the lines remain interconnected without the insertion of an amplifier.
- Fig. l shows a method of carrying out the invention whereby a telephone station over an incoming line from a distant exchange sets up a connection automatically to another telephone station, which is also connected to a long line, this being done by means of an impulse sender. After the connection has been set up, the ampliiers are switched in, this being done over a special by-path, over which subsequently the speaking connection extends, while the connecting route over the various selecting stages for setting up the connection is entirely disconnected after the amplifier has been switched in.
- Fig. 2 shows another method of carrying out the invention wherein the amplifiers are switched into the connecting route, for example between the selecting stages, the connecting route being opened after the ampliers have been switched in.
- lig. 3 shows an arrangement similar to Fig. 2, but here the ainpliers are directly switched onto the connection, in the example shown they are switched onto the incoming junction line. bviously the connecting up could also be eiiected at the outgoing line. Here also the connecting route is opened after the connection has been set up.
- the relay C 1 associated with the incoming line VL l in hewn manner is energized over: earth, battery, winding of relay C l, contact 20 u 1, lead c and earth at the preceding exchange.
- Relay C 1 operates its contacts.V r
- the incoming current impulses energize the relay J located in the incoming junction line and in accordance with the impulses its contact 2 'j a lies earth to the a lead of the junction line ga 1, thereby the relay A 1, which likewise is connected to the a lead, is energized at each impulse in the circuit over: earth, battery, Winding of relay A 1, contact 9 fw, lead a, contacts 21 u 1, 2 j, earth.
- relay A1 Each time relay A1 is operated its contact 3 a 1 is closed, whereby the liftin magnet H of the first group selector I. W is energized over earth and' contact 4 fw, the relay P 1 being energized in arallel therewith over its winding III. l agnet II raises the wipers of the switch to the desired level and relay P 1 short circuits its winding I over its contact 10 p 1. This short circuit of its winding I causes the relay P 1 to remain energized during the impulse transmission.
- the relay A 1 opens the circuit of the liftin magnet H and of relay P 1, hence over the o -normal contact 22 7c, which was closed at the first lifting step, the now closed contacts 6 p 1, 5 a 1, and 23 c 1, the ro tary magnet D of the switch is connected up and sets its wipers in motion.
- the contact 8 d is closed and 9 w is opened, and the switch is moved on step by step in known manner by the interaction of of the rotary magnet D and the relay A 1, which operate as a relay interrupter.
- the opened contact 9 w disconnects relay A 1 from the lead a.
- the seizing relay C 2 When the last switch in the selecting stage III.GW has been positioned on the line VL 2 going in the desired direction, the seizing relay C 2 is energized over its winding I associated with the outgoing end of the junction line VL 2; by closing its contact 54 c 2 it seizes at the terminal exchange of the outvoin line VL 2 a switch for selecting the sulbscrlber or an outgoing junction line.
- the relay K at the incoming end of the junction line VL 1 is operated at the same time and closes its contact 14 c, thereby operating at the call distributor AO the relay R 1 over: earth, contacts 14 c, 15 p 3, winding of relay R 1, battery, earth.
- the relay R 1 closes the circuit for the rotary magnet D 1 of the assignor over: earth, contacts 17 p 3, 16 1' 1, winding of D 1, battery, earth.
- the step-by-step movement of the switch is effected in known manner by the rotary magnet D l operating alternately with the relay R 1, so that the call assigner AO takes a step each time the circuit of D 1 is closed; after each step the relay R 1 is short circuitedvover the closed contact 18 d 1 and at contact 16 1 1 it opens the circuit of the rotary magnet.
- the relays P 3, B 1 and-B 2 are simultaneously operated in a circuit over: earth, winding of relay P 3, switch wiper, relay 1, contact 19 u 1, key 'I'a l, contact 13 79 1, the switches at-each selecting stage I, II and III GlV, key Ta 2, winding of relay B 2, battery, earth.
- These relays operate their contacts.
- Relay P 3 at its contact 17 p 3 opens the circuit of the rotary magnet D 1, which is arrested and at contact 15 p 3 it opens the circuit of relay R 1, which opens its contact 16 1' 1.
- Relay P 3 at the same time over contact 24.
- p 3 closes the circuit of relay R2 at the amplifier distributor VV.
- the amplifier dis tributor VV is always standing on a free amplier set, which is designated by the contact 55 a being in its normal position.
- relay R 2 when contact 24 p 3 is closed, the relay R 2 is operated and preparatorily closes its contacts 27 and 28 1 2 as well as D 3 and D 4, which at their contacts 29 d 3 and 30 d 4 alternately short circuit relay R 2, while relay R 2 at its contact 29 1 2 alternately closes and opens the circuit of the rotary magnets.
- the relays P 4, U 1 belonging to the calling line VL 1 and the relays P 5, U 2, C 2 winding II belonging to the outgoing line VL 2 are operated in the following circuit: earth, contact 27 1a 2, relay P 4 windings I and II, switch wiper, contacts 31 c 4, 346 1, winding of relay U 1, battery, earth; as well as: earth, contacts 28 1 2, 57 e, windings I and II of relay P 5, switch wiper, contact 35 b 2, winding of relay U 2, winding II of relay C 2, battery, earth.
- the relay J which lies in the incoming junction line VL 1, receives impulses, at each of which its contact 2 j applies earth to the lead a. rllhe impulses now go over the third lead of the bypath and energize the relay A 2 in -the outgoing junction 61, 37, 38, 39, 40, 4 1, 42', 43 and 44 z. the amplifier is switched into a. separate by-v 'Uland lcuit ol the fourth switch wiper. these keys opens the circuit over the fourth j line over: earth, contacts 2 y', 49 lu 1, n
- switch lAW 1 contact 61 z, wiper of switch AW 2, contact 50 u 2, lead a, choking coil 1 DR I, relay A 2, battery, earth.
- Relay A 2 repeats the impulses b closing its contacts 51 a 2 and 52 a 2, thereli'y applying the alternating VL 2; l
- This further selection can be effected satisfactorily'in eve case, that is to say also when for example t erelaysA U 1 and 'U 2 have not yet been energized or their contacts place either over the contacts of the relays U 2, which are still connected to the a lead or over their contacts already connected to the third lead of the hy-path.
- the relay C 4 at the incoming end of the junction vline VL 1 is rie-energized and at contact 31 c 4 it opens the circuit o: the relays U 1 and P 4, whereupon these relays fall back. Over the contact 53 p 4 the circuit of the relays P 5 and 2 and winding 1I of relay C 2 is also opened, thereby releasing the connection. Relay Z is energized untily the relays P 4 and P 5 have fallen hack and its winding is short circuited at contact 73 p 5. 'llhe release of the switches inthe preceding distant exchange was also initiated when the relay C 4 belonging to the incoming junction line VL 1 fell hack.. v
- the designation lfior the connecting up of the amplifiers takes place over the relay K located in the circuit of the fourth switch wiper.
- This designation can also 'be so arranged that for example the fourth switch wiper is omitted.
- rlhe connecting up oi the relays K, B 1 and B 2 then takes place over the lead of the setting up route as is shown dotted in the Fig. 1 ot the drawing.
- the circuit ⁇ of relay K then extends from .earth over the winding ot the relay K, contact 19 u 1, key Ta 1, contact 13 p 1, choking coil 1I Dr, lead l), switch, lead, choking coil II D1' 1, key
- the connection is set up over the selecting stages I, II and HIGVV in the same manner as previously described.
- the line VL 4 being a short line, it is not necessary to insert an amplifier when such a line is connected to the line VL 1, and, therefore, the line VL 4 does not have the means :for connecting up amplifiers, for example the relay B 2. Hence no amplifier can be inserted, because the absence of this means at this line also prevents the means at the calling line (relay K,B 1) being operated.
- the lines remain connected together over vthe route, that is to say over the switches,
- this connecting route also forms l the speaking route.
- the relay A belonging for example to the first group selector and the relay B belonging to the second group selector are operated.
- the speaking route extends over the amplifier and the selecting stages located in front and beyond it, that is to ⁇ say over the setting route and the inserted amplifier.
- the amplifiers in the example 3 are directly connected to the lines as shown for example to the incoming line VL 1.
- the tacts 121 a to 126 a connects the amplifier to the incoming line VL 1 and at the same time the operated contacts 121, 122 and 123 a open the connecting route.
- the speaking route extends over the amplifier and the different selecting stages.
- an incoming line a plurality of outgoing lines of two classes, a train of automatic switches controlled over said incoming line to select anyone of said outgoing lines, an amplifying device, and means effective only if the selected line is of a particular class for substituting said amplifying device for said train of automatic switches.
- a plurality of incoming lines divided into two classes, an outgoing line, a train of automatic switches controlled over a calling incoming line to connect withl said outgoing line, an amplifying device, and means veffective only if said calling line is of a particular class for substituting said amplifying device for said train of automatic switches.
- an incoming line a plurality of outgoing 'lines divided into two classes, automatic switches controlled over said incoming line for selecting any one of said outgoing lines, an amplifying device, and means effective if the selected line is of a particular class for inserting said amplifying device in the connection between the incoming and theselected outgoing line.
- j a plurality of incoming and outgoing lines, means controlled over a calling incoming line for connecting the line to one of said outgoing lines, discriminating means associated with certain of said lines having predetermined characteristics, a repeater, and means controlled by said discriminating means and effective only if both of said interconnected lines are of groenen said characteristics for automatically including said repeater in said connection.
- a plurality of incoming and outgoing lines divided into two classes, a train of automatic switches operated 4 over a calling incoming line to connect with one ci' said outgoing lines, a plurality of common link circuits each comprising a repeater and two inders, means eiective only if "ihoth' of the connected lines are of a particular class for associating an idle link circuit with said connection, and means for operating said K two ndere to connect with the incoming and the outgoing line, respectively, thereby coml5 pleting said connection through said repeatera 7.
- lin a telephone system a plurality of incoming and outgoing lines divided into two classes, a train of automatic switches operated over a calling incoming line to connect with one ci said outgoing lines, a plurality of common linlr circuits each comprising a reeater and two nders, means effective only if oth of the connected lines are of a particular class for associating an idle link circuit with said connection, means for operating said two nders to connect with the incoming and the 'outgoing line, respectively, thereby completin said connection through lsaid repeater,
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1795295X | 1929-05-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1795295A true US1795295A (en) | 1931-03-10 |
Family
ID=7743630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US452417A Expired - Lifetime US1795295A (en) | 1929-05-06 | 1930-05-14 | Telephone system |
Country Status (3)
Country | Link |
---|---|
US (1) | US1795295A (ja) |
FR (1) | FR691855A (ja) |
NL (1) | NL36256C (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2598159A (en) * | 1947-10-28 | 1952-05-27 | Cie Ind Des Telephones | Signaling arrangement for two-wire telephone lines |
-
0
- NL NL36256D patent/NL36256C/xx active
-
1930
- 1930-03-13 FR FR691855D patent/FR691855A/fr not_active Expired
- 1930-05-14 US US452417A patent/US1795295A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2598159A (en) * | 1947-10-28 | 1952-05-27 | Cie Ind Des Telephones | Signaling arrangement for two-wire telephone lines |
Also Published As
Publication number | Publication date |
---|---|
NL36256C (ja) | |
FR691855A (fr) | 1930-10-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1795295A (en) | Telephone system | |
US1647796A (en) | Telephone system | |
US2025145A (en) | Transmission system | |
US1604550A (en) | Rotary final selector switch | |
US1831399A (en) | Register equipment for automatic telephone exchanges | |
US2135921A (en) | Automatic telephone system | |
US1868296A (en) | Automatic telephone system | |
US1912453A (en) | Telephone exchance system | |
US1690206A (en) | Telephone system | |
US1729858A (en) | Telephone system | |
USRE18828E (en) | A corpo | |
US1821998A (en) | Circuit arrangement for automatic and semiautomatic telephone exchange systems | |
US1696254A (en) | Automatic telephone system | |
US2744963A (en) | Multi-office telephone system | |
US1841123A (en) | Telephone exchange system | |
US2136620A (en) | Telephone system | |
US1795494A (en) | Telephone system | |
US2225478A (en) | Telephone system | |
US1567266A (en) | Message-register system | |
US1963747A (en) | Telephone system | |
US1938433A (en) | Telephone system | |
US1934402A (en) | Telephone system | |
US1735328A (en) | Automatic telephone system | |
US2033283A (en) | Signaling system | |
US1965435A (en) | Telephone system |