Title:
【発明の名称】警報発信器
Document Type and Number:
Japanese Patent JP2568589
Kind Code:
B2
Abstract:
PURPOSE:To practically strengthen warning information quantity by equipping a code converting part, to which a digital current value to correspond to necessary priority is written, to a transmitter in the warning transmitter of a gas supplying system equipment for communication cable maintenance. CONSTITUTION:When the calling address of a self-address is sent from a remote monitoring device, a warning transmitter 9 goes to an operating condition through a signal responding circuit part 17 of the warning transmitter 9. An address signal, which corresponds to an ON and OFF signals corresponding to the operating condition from respective warning contacts S1, S2..., is supplied to a code converting part 15. In this code converting part 15, a digital current value, which corresponds to the priority corresponding to the important degree or the overlapping degree of the contacts S1, S2..., and a correspondent digital current having the operation of the contacts S1, S2... of the low important degree as a forecasting pattern are set. Then, the output of the converting part 15 is transmitted through a D/A converter 16 and a voltage current converting part 18, etc., to the remote monitoring device. Thus, the warning information quantity are practically increased and strengthened.
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Inventors:
Mitsuru Saho
Akihiko Yamaguchi
Yukio Togo
Akihiko Yamaguchi
Yukio Togo
Application Number:
JP27056087A
Publication Date:
January 08, 1997
Filing Date:
October 27, 1987
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
Sumiden Opcom Co., Ltd.
Sumiden Opcom Co., Ltd.
International Classes:
G01R31/02; G08B21/00; G08B21/16; H02J13/00; H04Q9/00; (IPC1-7): G08B21/00; H02J13/00
Attorney, Agent or Firm:
Kazutoyo Watanabe