| 摘要 |
753,991. Repeaters. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Nov. 17, 1954 [Feb. 9, 1954], No. 3718/54. Class 40 (4). [Also in Group XXXVII] Power is supplied from one station over the signalling line IC to other stations at each of which it is repeated electromechanically, e.g. by means of a synchronous motor M driving an alternator A which excites the motor rotor through a rectifier (see Group XXXVII), to the next section of the line. Channel filters F prevent the power supply from by-passing the repeater RSL. |
