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    Dialing systems
    1.
    发明授权
    Dialing systems 失效
    拨号系统

    公开(公告)号：US3657484A

    公开(公告)日：1972-04-18

    申请号：US3657484D

    申请日：1970-03-06

    Applicant: CIT ALCATEL

    Inventor： ARNOUX MICHEL

    IPC: H04Q1/38 ,  H04Q3/42 ,  H04M3/00

    CPC classification number: H04Q3/42 ,  H04Q1/38

    Abstract: The object of the invention is a device for composing a number by means of a keyboard, by impedance variation. The lines are classified according to at least three categories of impedance, the system comprising means determining first the category of line measured or the zone and carrying out this measurement of the line impedance as soon as the device comprising measuring apparatus corresponding to the impedance zones and working in parallel, each measuring apparatus comprising comparators adapted respectively to the various categories of lines.

    Abstract translation: 本发明的目的是通过阻抗变化通过键盘来组合数字的装置。

    6.
    发明专利
    未知

    公开(公告)号：FR1467981A

    公开(公告)日：1967-02-03

    申请号：FR43713

    申请日：1965-12-24

    Applicant: CIT ALCATEL

    Inventor： ARNOUX MICHEL

    IPC: H03K3/45

    Abstract: 1,166,679. Magnetostatic relays. C.I.TCOMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS. 22 Dec., 1966 [24 Dec., 1965], No. 57575/66. Heading H3B. A magnetostatic relay can be controlled either by signals applied to the base of transistor TR 1 or by signals applied to windings 2, 3, 4. In the absence of a positive signal on line f c the device operates as a conventional magnetostatic relay, the transistor providing an output only when the potential at point M is negative. If a positive signal is applied to point N by way of line f c the transistor is blocked and no output is produced, whatever the potential at M. Pulse trains having different frequencies may be applied to lines f 1 C 1 , f 2 C 2 , f n C n , the output from the magnetic amplifier then being sampled only when the resultant potential at N becomes negative due to the absence of signals on line f c . The frequency of sampling is determined by the lowest of the frequencies on lines f 1 C 1 ,f 2 C 2 and f n C n . If a large output current is required R 2 and R L are made relatively small, but since a low value for R 2 results in the potential at M becoming negative shortly after removal of a positive signal on line f c , in spite of capacitor C which tends to maintain the potential at M, the sampling period must be short. If R 2 is made larger the output is smaller but no limitation is placed on the sampling period.

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