US1758919A - Cabling arrangement for telephone systems - Google Patents

Description

May 20, 1930. M. J. ARNDT 1,758,919

CABLINQI'ARRANGEMENT FOR TELEPHONE SYSTEMS Fiied April e, 1927 2 sheets-sheet 1 REG. SUBS MULTlPLE JACKS r/// 'y /A l www ATTO RN May 20, 1930. M. J. ARNDT CABLING ARRANGEMENT FOR TELEPHONE SYSTEMS FIGA M ELVIN J. AQNDT' Patented May `20, 1930 UNITED s'rarlfzsA PATENT ori-lcs 7 MELVIN J. ARNDT, or ROCHESTER, NEW YORK., AssIGNoR To THE STRMBERG CARL- SON TELEPHONE MANUFACTURING COMPANY, OF ROCHESTER, NEW YORK, A COR- PORATION or NEW YORK CABLING ARRANGEMENT FOR TELEPHONE Application led April 6;

This invention relates to manual telephone systems and more particularly to the arrangement and cabling of a telephone switch-` board and its associated terminal equipment.

In certain of the improved types of switchboards now in use it is customary for each subscribers line served therein to terminate in ananswering jack at an operators position and in addition it alsol appears in an ancillary jack at another opera-tors position, while the upper portion `of the switchboard is provided with the well-known multi- 'ple jacks through, which subscribers lines tically impossible to distribute theload uniformly to all operators and since the cabling arrangement ust referred to does not lend itself to rearrangement, if the answering equipment must be rearranged,it is necessary either to splice out the present cables or furnish new cables both of'which make-shifts tend to complicate the cable run and may entirely block the cable run from future growth.

A further disadvantage of the present arrangement is the fire hazard since with the cable run extending the whole length of the switchboard a fire starting at an answering jack in the board usually burns into the cable run lthereby disablingv more or less of the switchboar The present invention permits wide flexibility of the answering equipment because the answeringjacks maybe multipled iii-any desired manner at the time of installation and may be easily changedat somelater timeto meet changing traiiic requirements. In addition the answering jacks, lamps and cables can be moved from one partsof vthe switch- 1927. Serial N0. 181,399.

board to another without the necessity of splicing-the old cables or furnishing new ones, and furthermorethe method of cabling eliminates the answering jack cable run entirely from the switchboard thereby leaving the rear of the board much more accessible.

The main feature of the invention by which the above advantages are obtained consists in mounting the intermediate 'distributing frame parallel to the switchboard with one vertical of the frame aligned with each panelof the switchboard and by employing short cables betweenthepanels of the board and the verticals of the intermediate distributing frame.

A further feature of the inventionl consists in mounting the switchboard directly above the intermediate distributing' frame with the verticale of the frame spaced on the same centers as the jack stiles in the switchboard.

An additional feature of the invention resides in the wiring connections and cables between the multiple terminals, the answer-` ing aclsy andthe relay rack.

, In the drawings Figs. liand Qrepresent one embodiment of the invention in which Fig. 1 shows a verticalsection through' two floors of a telephone building with the intermediate distributing framev on one floor and the switchboardV placed on the floor directly above. Y Fig.`2 isa section through the telephone buildingfat right angles to that of Fig. 1 and showsv how the switchboard is positioned directlyV above the intermediate distributing frame. Fig. 3 shows a modified form of, the invention representing an end view of an intermediate distributing frame and the switchboard which are mounted fon the same floor in parallel relation. Figi-l Y is a wiring'diagram indicating the method of interconnectingthe different pieces of equipment by umpers and cables.

For a better understanding of the inveii-A tion reference ismade to Figs, 1 and 2 in which 10 represents one Hoor of a-te'lephone exchange and 11 designates the floor' directly above. On this upper floor there is positioned a vswitchboard generally. designated 12 and which consists of a plurality lof sections such as 18 only four of which are shown.

PRIM. ANS. while in the space in the-panel` directly above the primary and. ancillary answering j acksthere are. mounted the usual multiple jacks through which subscribers" lines may be called. It will be noted that in the squares representingpthe bloclisotL one hundred primary answering jacks and the ancillary answering jacks, there. appear small r numerals such as 0, 1, ,2, 3, etc. which indicatethe hundreds designation of; tlre lines ternjiinatin-g.;V in these blocks. ForA exampleV the lines appearingin the 07' block have the designation of 0 to199inclusive.

Onthelowerifoor vdesignated 10 there is erected an intermediate distributing frameA built'withits verticalsA 16 spaced on thesame centers as the aclr stiles 15` ofthe switchboard.` Thus there is provided one I verticalof the frame for ea ch panel of the switchboard thatis Aused for localteleplrone lines. The cables 30 from-the answering'j acks and lamps of the, switchboard 12-are brought down throughl the floor V11 th-rough pipes 17 as shown, or the iioor can be constructedwith a slotA therein extending theV entire Ylengthl ofthe switchboard.

Theseanswering cables are made sets ot' ten foreach panel andy sinceA alljpanels are alike as toA form and over-allfleng-tha it is only necessary to design the Iten cables for the-first panel Asince the other sets of ten Cables for the remaining panels lare `identicalwith the first. engineering of anninstallationv this arrangementreduces thechances ot error-inl laying' out the cablingsystem. Furthermore-if itis desirable to move-the equipment-oi any-panelV or panels it-is only necessary tol moveJ the set-oi? ten cables associateddwith. each panel and this can ben done -without disturbing the cablingV of the remaining' panels.

In-ithe arrangement shown in Figs. 1 and 2 theintermediateframe is built with two-hundred Vterminals Von the-answeringjack side of the` vertical, and theupper hundred of these terminalsthroughout tliefr'ame are connected with the primary answering jacks -ot each panelof th'eswitehboard while thelower hundred terminals 19 of theyertical 'are connected-to-the ancillary answering-j acks ofthe corresponding panel: Bywrete'rring tothe primary. and' ancillaryanswering j-ackl arrangement shown in Fig.- lit will beA noted that .while the primary answering` jacksf are arranged-in' numericalorder they ancillary* answering jacks are transposedor staggered in.k suchla manner that whileutlie lines in the 6th', 7th, 8th,9th', 10th.-andllththundreds groups aretgiveni preference by. being. `con- In addition to-simplifying the nected to the primary answering jacks in the Llth and 5th divisions of sections 2 and 3, these lines having a secondary preference by being connected to the ancillary answering jacks in the second and third divisions ot' sections l1 and 2. The multipling andtranspositionof these lines just referred to may be effected in rthe intermediate.distributing. frame as shown by the parallellbraces and dottedconnecting lines in Fig, lirepresenting jumper wires. The regular subscribers mul- `tiple jacksappearing in the upper portion of the switchboard are connected in the usual manner bya cva-bleextending throughout the length of the board and indicated in dotted lines at 20. This cable is supported over a cable rack such as 21 and extends to one end of the intermediate distributing frame whereit is supported on the cross-irons such as 22 of the fivel upper levels on the horizontal side of the frame which carries termina-l strips 23 vfor terminating the-multiple cable. It willbe noted that thereA are no terminals placed inthe lower portion of this side of the frame and it will beA understood that'the multiple terminals are connected or jumpered to the` primary answering jack terminalslS on the opposite `side of'the frame.

In the modification shown in Fig. 3 the switchboard 12 and the intermediate distributing fra-me generally designated 9 are inountedon' the same looror-level. As .in the arrangement ofi Figs. 1` and'2' the switchboard and distributing :trame extend in parallell relationwith theverticals of the distributing` :tramel positioned directly back ot' thecorresponding jack stilesofthe switchboard.` Otherwise thewarrangement of the equipment is the same-as-that shown in Figs. 1 and 2 and the4 cabling is also thel same except vinstead of being dropped vertically from the-switchboard to theframe itmust be mounted as shown in dotted lines at v23.

The wiring between the different pieces ot' equipmentin the two modifications is the same as shown in Fig. @wherein it is represented that cables 24 connect answering terminal strips 18 in the intermediate distributingrame to theli'nerelay'rack (not shown) but the connectionis indicated tothe line relays 25. The line relay rack is then connected to the main distributing frame not` shown in Figs. 2 and Sbut represented at 26 in Fig. et. Cables designated 30`connect the primary answering jacks and the ancillary answering jacks to the terminali-:18 and 19 of the intermediate distributing frames-while jump-l ers 27' connectthe` primary answering jacks to. corresponding terminals of the multiple jacks. Otherjumpers suchl as 28; serve to cross-connect the. primary answering jack terminals and the ancillary answering jack terminals at the intermediate.y distributing :trame tofpermit staggering of the ancillary answering jacks.

It will thus be seen that the present invention provides an improvedv arrangement of telephone exchange equipment and the method of interconnecting it which simpliiies installation and permits easy rearrange- -v ment of the equipment to meet changing traffic requirements.

What I claim, is:

Telephone exchange equipment including a switchboard mounted on one floor, said switchboard being provided with 'panels7 each panel having a plurality of primary ans-wering jacks and ancillary answering jacks, an intermediate distributing frame on a Second floor directly beneath said switchboard and extending in the same direction as said switchboard, said intermediate distributing frame having verticals spaced on the same centers as the sides of said panels, terminals y on each panel, cables connecting the primary answering jacks and ancillary answering jacks to terminals on associated verticals and jumpers Jfor cross-connecting said terminals whereby the appearances of lines in said ancillary jacks may be varied by interchanging said jumpers.

In witness whereof, I hereunto subscribe my name this 14th day of March A. D. 1927.

MELVIN J. ARNDT.

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