JPS5274785A - Remote controller - Google Patents

Remote controller

Info

Publication number
JPS5274785A
JPS5274785A JP50149606A JP14960675A JPS5274785A JP S5274785 A JPS5274785 A JP S5274785A JP 50149606 A JP50149606 A JP 50149606A JP 14960675 A JP14960675 A JP 14960675A JP S5274785 A JPS5274785 A JP S5274785A
Authority
JP
Japan
Prior art keywords
remote controller
frequencies
minimize
making
prevent
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
JP50149606A
Other languages
Japanese (ja)
Inventor
Hiroshi Miyamoto
Shigeo Matsuura
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP50149606A priority Critical patent/JPS5274785A/en
Publication of JPS5274785A publication Critical patent/JPS5274785A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac
    • G08C19/14—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac using combination of fixed frequencies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Television Systems (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To prevent an erroneous operation by a coin etc., and also to minimize using frequencies by making a transmitting signal to be a coded signal of a binary number bit using two frequencies.
JP50149606A 1975-12-17 1975-12-17 Remote controller Pending JPS5274785A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50149606A JPS5274785A (en) 1975-12-17 1975-12-17 Remote controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50149606A JPS5274785A (en) 1975-12-17 1975-12-17 Remote controller

Publications (1)

Publication Number Publication Date
JPS5274785A true JPS5274785A (en) 1977-06-23

Family

ID=15478873

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50149606A Pending JPS5274785A (en) 1975-12-17 1975-12-17 Remote controller

Country Status (1)

Country Link
JP (1) JPS5274785A (en)

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