US2208917A - High frequency system - Google Patents

High frequency system Download PDF

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Publication number
US2208917A
US2208917A US201715A US20171538A US2208917A US 2208917 A US2208917 A US 2208917A US 201715 A US201715 A US 201715A US 20171538 A US20171538 A US 20171538A US 2208917 A US2208917 A US 2208917A
Authority
US
United States
Prior art keywords
lines
high frequency
switches
relays
filter
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
Application number
US201715A
Other languages
English (en)
Inventor
Wiessner Alfred
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2208917A publication Critical patent/US2208917A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/02—Constructional details
    • H04Q1/04—Frames or mounting racks for selector switches; Accessories therefor, e.g. frame cover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/76—Wired systems
    • H04H20/77—Wired systems using carrier waves
    • H04H20/81—Wired systems using carrier waves combined with telephone network over which the broadcast is continuously available
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/16—Arrangements for interconnection between switching centres in systems employing carrier frequencies

Definitions

  • the present invention relates to high frequency systems, and more particularly to selector rack arrangements in such systems as generally employed in telephone exchange stations.
  • the present invention has for its object to avoid the aforesaid difficulties by arranging the filter devices directly in the selector racks and in close proximity to the appertaining sets or groups of selector switches and relays, so as to permit connecting wires of short lengths to be used.
  • Fig. 1 is afront elevation of an arrangement according to the invention
  • Fig. 2 is a side elevation of the arrangement shown in Fig. 1
  • Fig, 3 shows a suitable wiring arrangement according to the invention.
  • l denotes a rack or frame carrying horizontal cross bars I which serve as support for 10 to 15 selector switches 2 and their pertaining sets of relays 3.
  • the selector and relay sets or groups are attached to one side of the rack, while the lines 5 which are to be conabove the small boxes in which the electric filters 6 are placed.
  • each filter device is fixed to its appertaining group or set of selectors and relays, an expedient which enables reliable supervision of the system and a 10 considerably simplified wiring between the various elements.
  • the Fig. 3 illustrates the simple wiring conditions attained in accordance with the invention.
  • the wires to the con- 15 tacts t of the cut-oif relay (not shown) which is allotted to the ore-selector circuits, are connected to the speech wires (12 and D2 of the final switch, and to the subscribers line a, bat the terminal strips of the pre-selector frame.
  • the 20 wires which are extended to the subscribers line over the main distributor are looped through an exchange filter by a simple wiring change.
  • the lines a, b are associated with the output side of the electric filter and the high frequency os- 25 cillations are impressedover the conductors al, bl.
  • selector switches arranged in groups, high and low fre- 30 quency separating filters also arranged in groups corresponding to said selector groups, a plurality of two wire telephone lines arranged in groups corresponding to said switches and filters, each line having a filter associated therewith, a unitary supporting frame having a plurality of racks one for each of said groups of switches filters and lines, whereby each filter is mounted immediately adjacent the common connections between the associated selectors and lines.
  • a telephone exchange system preselector switches arranged in linear groups, control relays arranged in linear groups corresponding to said switches, high and low frequency separating filters arranged in linear groups corresponding to said switches and relays, a plurality of two wire telephone lines arranged in groups corresponding to said switches relays and filters, a unitary supporting frame having a plurality of Tacks one for each. group of switches, relays filters and lines, whereby each filter is mounted immediately adjacent the corresponding switches relays and lines.
  • a telephone exchange system in which the two Wire lines and associsubscribers lines and through which the subscribers lines are connected to the contacts of the associated cut-off relay, said subscribers lines being connected to the low frequency output end of the associated filter, a high frequency line connected to the input of each filter, said lines filters relays and selectors being arranged in corresponding linear groups, and a unitary supporting frame having supporting racks for said lines filters relays and switches, whereby each filter can be mounted immediately adjacent the associated relays and pre-selector switches.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Exchange Systems With Centralized Control (AREA)
US201715A 1937-04-13 1938-04-13 High frequency system Expired - Lifetime US2208917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE497534X 1937-04-13

Publications (1)

Publication Number Publication Date
US2208917A true US2208917A (en) 1940-07-23

Family

ID=6545191

Family Applications (1)

Application Number Title Priority Date Filing Date
US201715A Expired - Lifetime US2208917A (en) 1937-04-13 1938-04-13 High frequency system

Country Status (5)

Country Link
US (1) US2208917A (enrdf_load_html_response)
BE (1) BE427559A (enrdf_load_html_response)
CH (1) CH203270A (enrdf_load_html_response)
FR (1) FR836524A (enrdf_load_html_response)
GB (1) GB497534A (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671825A (en) * 1949-01-26 1954-03-09 Telecommunications Sa Amplifying equipment for longdistance telephone cables

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671825A (en) * 1949-01-26 1954-03-09 Telecommunications Sa Amplifying equipment for longdistance telephone cables

Also Published As

Publication number Publication date
CH203270A (de) 1939-02-28
GB497534A (en) 1938-12-21
BE427559A (enrdf_load_html_response) 1938-05-31
FR836524A (fr) 1939-01-19

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