DE9403516U1 - Wireless intercom - Google Patents

Wireless intercom

Info

Publication number
DE9403516U1
DE9403516U1 DE9403516U DE9403516U DE9403516U1 DE 9403516 U1 DE9403516 U1 DE 9403516U1 DE 9403516 U DE9403516 U DE 9403516U DE 9403516 U DE9403516 U DE 9403516U DE 9403516 U1 DE9403516 U1 DE 9403516U1
Authority
DE
Germany
Prior art keywords
wireless intercom
intercom
wireless
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.)
Expired - Lifetime
Application number
DE9403516U
Other languages
German (de)
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.)
SCHMIDT EDGAR 58091 HAGEN DE
Original Assignee
SCHMIDT EDGAR 58091 HAGEN DE
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 SCHMIDT EDGAR 58091 HAGEN DE filed Critical SCHMIDT EDGAR 58091 HAGEN DE
Priority to DE9403516U priority Critical patent/DE9403516U1/en
Publication of DE9403516U1 publication Critical patent/DE9403516U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/112—Line-of-sight transmission over an extended range
    • H04B10/1123—Bidirectional transmission
    • H04B10/1127—Bidirectional transmission using two distinct parallel optical paths
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/30—Mounting radio sets or communication systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/385—Transceivers carried on the body, e.g. in helmets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/385—Transceivers carried on the body, e.g. in helmets
    • H04B2001/3866—Transceivers carried on the body, e.g. in helmets carried on the head
DE9403516U 1994-03-02 1994-03-02 Wireless intercom Expired - Lifetime DE9403516U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9403516U DE9403516U1 (en) 1994-03-02 1994-03-02 Wireless intercom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE9403516U DE9403516U1 (en) 1994-03-02 1994-03-02 Wireless intercom

Publications (1)

Publication Number Publication Date
DE9403516U1 true DE9403516U1 (en) 1994-07-28

Family

ID=6905372

Family Applications (1)

Application Number Title Priority Date Filing Date
DE9403516U Expired - Lifetime DE9403516U1 (en) 1994-03-02 1994-03-02 Wireless intercom

Country Status (1)

Country Link
DE (1) DE9403516U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014019516A1 (en) * 2014-12-24 2016-06-30 Dräger Safety AG & Co. KGaA Assembly with a plastic housing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014019516A1 (en) * 2014-12-24 2016-06-30 Dräger Safety AG & Co. KGaA Assembly with a plastic housing

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