JPS5820043A - 地中電気無線通信 - Google Patents

地中電気無線通信

Info

Publication number
JPS5820043A
JPS5820043A JP11872881A JP11872881A JPS5820043A JP S5820043 A JPS5820043 A JP S5820043A JP 11872881 A JP11872881 A JP 11872881A JP 11872881 A JP11872881 A JP 11872881A JP S5820043 A JPS5820043 A JP S5820043A
Authority
JP
Japan
Prior art keywords
signal
loudspeaker
current
underground
radio communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11872881A
Other languages
English (en)
Inventor
Isamu Hirabayashi
平林　勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP11872881A priority Critical patent/JPS5820043A/ja
Publication of JPS5820043A publication Critical patent/JPS5820043A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 送信するには、電気発信機又は送話機を使い、その信号
電流を地中に流し、別の地点で地中線を使い電流を取り
出して、受信機又は受話機を使い通信する。
目的は非常の場合便利。構成は、送信機付広声機、受信
機付伝声機、地中線２組。
【図面の簡単な説明】
図面は平面図　１大　地　２送信機付広声機３受信機付
広声機　４地中線 手　　　　続　　　　補　　　　正　　　　書昭和５７
年２−月ノ２日 特許庁長官　　　　　　　　殿 蔓件の表示　　　昭和、（年　　　特許願第ρ１郊Ｐ号
発明の名称　　　地中電気無線通信 補正をする者 事件との関係　　特許出願人 補正の対象　　　特許出願人記名のあとに鮮明に捺印し
八もの濃墨を用いた図面 補正の内容　　　別紙の通り

Claims (1)

    【特許請求の範囲】
  1. 本発明は、地中に電゛気信号を入れて、別の地点で電流
    を出して通信するもの。
JP11872881A 1981-07-28 1981-07-28 地中電気無線通信 Pending JPS5820043A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11872881A JPS5820043A (ja) 1981-07-28 1981-07-28 地中電気無線通信

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11872881A JPS5820043A (ja) 1981-07-28 1981-07-28 地中電気無線通信

Publications (1)

Publication Number Publication Date
JPS5820043A true JPS5820043A (ja) 1983-02-05

Family

ID=14743603

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11872881A Pending JPS5820043A (ja) 1981-07-28 1981-07-28 地中電気無線通信

Country Status (1)

Country Link
JP (1) JPS5820043A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4707389A (en) * 1983-09-30 1987-11-17 Baxter Travenol Laboratories, Inc. Multilayer tube, assembly and method
JPS6328221A (ja) * 1986-07-21 1988-02-05 株式会社日立製作所 保護リレーの動作状態表示回路

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4707389A (en) * 1983-09-30 1987-11-17 Baxter Travenol Laboratories, Inc. Multilayer tube, assembly and method
JPS6328221A (ja) * 1986-07-21 1988-02-05 株式会社日立製作所 保護リレーの動作状態表示回路

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