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    • 3. 发明专利
      GB1170250A Telephone Switching System 未知
    • Telephone Switching System
    • GB1170250A
    • 1969-11-12
    • GB5161266
    • 1966-11-17
    • HITACHI LTD , NIPPON TELEGRAM AND TELEPHONE
    • CHIKAI II , KONDO EIROKU , KUWABARA MOTOSUKE , HISAMURA MAKOTO , NAKAZIMA HAZIME , TASHIRO JOJI
    • H04Q3/00
    • 1,170,250. Automatic exchange systems. HITACHI Ltd., and NIPPON TELEGRAM R. TELEPHONE PUBLIC CORP. 17 Nov., 1966, No. 51612/66. Heading H4K. In a marker controlled local exchange connected by trunks L R to a parent exchange, a calling subscriber is initially connected to a register R which automatically seizes one of the trunks via a switch train RL separate from the main speech switch train LLF and repeats further digits over the separate switch train until such time as the main speech train is completed, whereafter further digits are repeated over this train and the register and separate train are released. If the initially dialled digits signify a local call, the trunk and 'the connection thereto are released and the register and marker complete the call in the normal manner (link IOT). If the first digit is O, a toll trunk LT is seized over the separate switch train and digits are repeated to this trunk in a manner similar to the above, the trunk to the parent exchange being released. Incoming trunks ICT are connected via the switch train RL to a register. In this case if the iitial digit which is suppressed signifies a tandem call, the register is connected via a relay selector TC (Fig. 5, not shown) to a both-way trunk BWTR leading to the wanted sub-exchange LE and digits are repeated over this path. When digit repeating is completed, the incoming trunk is connected via switches LLF to BWTR and the path via TC is dropped. For such tandem calls, ringing at the sub-exchange is controlled by relays in the trunk circuit of BWTR (Fig. 6, not shown). The switches LLF and RL comprise cross-bars, the operation of the latter in response to seizure of a register being described with reference to Figs. .3 and 4 (not shown). The initial digit(s) discriminator comprises a contact tree having relays connected to the relevant outlets for controlling the various kinds of call (Fig. 3, not shown). The subexchange LE is of the step-by-step type.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 4. 发明专利
      GB1160139A Improvement in the Rack Structure for Communication Equipment 未知
    • Improvement in the Rack Structure for Communication Equipment
    • GB1160139A
    • 1969-07-30
    • GB5474966
    • 1966-12-07
    • HITACHI LTD , NIPPON TELEGRAM AND TELEPHONE
    • NAKAZIMA HAZIME , TANAKA HIROSHI , TANAKA YASUYUKI , YOSHIKAWA HIROSHI , KAZAMA HISAYOSHI
    • H04Q1/10 , H05K7/18
    • 1,160,139. Mounting telephone equipment. HITACHI Ltd. and NIPPON TELEGRAM & TELEPHONE PUBLIC CORP. 7 Dec., 1966, No. 54749/66. Heading H1L and H1R. A plurality of rack frames are resiliently mounted in a casing. Communication equipment is mounted in a plurality of boxes made of steel their wall members and tops being filled with polyurethane foam and their entire inner surfaces lined with a hardboard. The interior of each box, Fig. 3, is divided into a front compartment 5 having disposed therein a distributing frame 6 and a line register 7 associated with an external cable, and a rear compartment 8 containing a cross-bar type switching system 9. The rear compartment is ventilated and both compartments are sealed against water and dust. The telephone exchange system in the rear compartment 8 is mounted on a plurality of rack frames 22, Fig. 12, each frame 22 comprising upstanding main posts 25, upper frame member 38 having a channelled cross-section and a lower frame member 45 also having a channelled cross-section. The upper frame members 38 of adjacent racks are fixed to each other by members 27 and adjacent rows are connected together by channelled crosssection reinforcing members 41. In order to maintain the frames fixed in relation to the walls of the box reinforcing members 39 are bolted between the last row of frames and the side of the box. The reinforcing members 39, 41 act as cable racks for cables 42. In order to damp vibrations of the main posts 25 cushion members 28 are adhesively fixed between adjacent frames at the mid points of the main posts 25. The rack frames are mounted to the floor of the box by means of bolts 43 and nuts 48, the lower member 45 being sandwiched between cushion members 44, 46 as shown so that each rack frame can be levelled by tightening or slackening nut 48. The distributing frame 6; Figs. 9, 10 comprises a plurality of vertical rods, rods 29 supporting terminal boards 31 and rods 30 supporting breakers 32. Wires from the terminal boards and breakers pass through wire guides 34 to distribution rings 33, the latter being provided with cut outs 35 for individually disconnecting a line of circuit breakers or terminal boards for a connection operation.
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