[go: up one dir, main page]

DE1802249U - MAGNETIC SHIELDING FOR ELECTROACOUSTIC CONVERTERS FOR TELEPHONE USE. - Google Patents

MAGNETIC SHIELDING FOR ELECTROACOUSTIC CONVERTERS FOR TELEPHONE USE.

Info

Publication number
DE1802249U
DE1802249U DER19211U DER0019211U DE1802249U DE 1802249 U DE1802249 U DE 1802249U DE R19211 U DER19211 U DE R19211U DE R0019211 U DER0019211 U DE R0019211U DE 1802249 U DE1802249 U DE 1802249U
Authority
DE
Germany
Prior art keywords
magnetic shielding
telephone use
electroacoustic converters
electroacoustic
telephone
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
Application number
DER19211U
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.)
FRIEDRICH REINER TELEFONFABRIK
Original Assignee
FRIEDRICH REINER TELEFONFABRIK
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 FRIEDRICH REINER TELEFONFABRIK filed Critical FRIEDRICH REINER TELEFONFABRIK
Priority to DER19211U priority Critical patent/DE1802249U/en
Publication of DE1802249U publication Critical patent/DE1802249U/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
    • 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
    • H04B1/3833—Hand-held transceivers
    • H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Description

Magnetische Abschirmung für elektroakustischen Wandler für Fernsprechzwecke. ] MMMNMMMa'ts=MasMa=MBXE : BeneasEBM=eB : e : M : B : M : t*sBtB*xN : fO : CEMetM) c : atMe3tME : s : aats : : aa=sB==SE==eitetM : Bei den bisher gebräuchlichen elektroakustischen Wandlern für Fernsprechzwecke, insbesondere Hör-u. Sprechkapseln mit eingebauten Magnetsystemen nach dem dynamischen Prinzip Fig. 1, welche mit Membranen aus Nichteisenmetallen bzw. Kunststoffmembranen ausgerüstet sind, treten in Richtung der Hörmuschel mehr oder weniger starke magnetische Streufelder, Fig, 1,3 z. B. zwischen den Polen 1 und 2, auf.Magnetic shield for electroacoustic transducers for telephone use. ] MMMNMMMa'ts = MasMa = MBXE: BeneasEBM = eB: e: M: B: M: t * sBtB * xN: fO: CEMetM) c: atMe3tME: s: aats:: aa = sB == SE == eitetM: In the previously common electroacoustic transducers for telephone purposes, especially hearing u. Speech capsules with built-in magnet systems according to the dynamic principle of FIG. B. between poles 1 and 2 on.

Diese Streufelder werden auch durch die bisher üblichen Schutzdeckel 4 aus Nichteisenmetallen, nicht beeinflusst. Durch dieses Streufeld können unter Umständen ungewünschte erscheinungen hervorgerufen werden, d. h. es können Eisenteile an der Hör-bezw. Sprechmuschel des Handapparates festgehalten werden.These stray fields are also eliminated by the protective cover that was customary up to now 4 made of non-ferrous metals, unaffected. This stray field allows under Undesirable phenomena are caused under certain circumstances, d. H. there can be iron parts at the listening or Mouthpiece of the handset to be held.

Claims (2)

Diese unerwünschte Erscheinung-wird erfindungsgemäss dadurch beseitigt, dass nach Fig, 2 der schutzdeckel 6 aus einem ferromagnetischen Werkstoff gefertigt ist, der den Austritt des magnetischen Streuflusses 5 zwischen den Polen 1 und 2 aus dem Kapselinneren verhindert, Schutzanskruch MMMWS= : ! =msas= : a ! a : ts= : E===
Magnetische Abschirmung für elektroakustische Wandler für Fernsprechzwecke dadurch gekennzeichnet, dass der Schutzdeckel (Fig. According to the invention, this undesirable phenomenon is eliminated in that, according to FIG. Protection claim MMMWS =:! = msas =: a! a: ts =: E ===
Magnetic shielding for electroacoustic transducers for telephone purposes, characterized in that the protective cover (Fig. 2 Teil 6) aus einem ferromagnetischen Werkstoff gefertigt ist, der den Austritt des magnetischen Streuflusses in Richtung der Hör-bezw. Sprechmuschel des Handapparats verhindert.2 part 6) from a ferromagnetic Material is made that the exit of the magnetic leakage flux in the direction the listening resp. Handset mouthpiece prevented.
DER19211U 1959-10-16 1959-10-16 MAGNETIC SHIELDING FOR ELECTROACOUSTIC CONVERTERS FOR TELEPHONE USE. Expired DE1802249U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER19211U DE1802249U (en) 1959-10-16 1959-10-16 MAGNETIC SHIELDING FOR ELECTROACOUSTIC CONVERTERS FOR TELEPHONE USE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER19211U DE1802249U (en) 1959-10-16 1959-10-16 MAGNETIC SHIELDING FOR ELECTROACOUSTIC CONVERTERS FOR TELEPHONE USE.

Publications (1)

Publication Number Publication Date
DE1802249U true DE1802249U (en) 1959-12-17

Family

ID=32887111

Family Applications (1)

Application Number Title Priority Date Filing Date
DER19211U Expired DE1802249U (en) 1959-10-16 1959-10-16 MAGNETIC SHIELDING FOR ELECTROACOUSTIC CONVERTERS FOR TELEPHONE USE.

Country Status (1)

Country Link
DE (1) DE1802249U (en)

Similar Documents

Publication Publication Date Title
FR1337222A (en) Electromagnetic device for moving inside a tubular-shaped body component parts in the form of bars, in particular adjustment or shut-off bars of nuclear reactors
GB1052561A (en)
DE1802249U (en) MAGNETIC SHIELDING FOR ELECTROACOUSTIC CONVERTERS FOR TELEPHONE USE.
ES294013A1 (en) Improvements introduced in the manufacture of alloy steels (Machine-translation by Google Translate, not legally binding)
GB996319A (en) Improvements relating to metals for use in welding
GB1039335A (en) Hydronalium alloy for die-casting use
DE660377C (en) Magnetization head for longitudinal magnetization of magnetogram carriers
AT224719B (en) Shielding against stray force lines of a loudspeaker equipped with a permanent magnet
DE971442C (en) Dynamic speaker
DE1838244U (en) PERMANENT MAGNETIC LOW-SPREAD SPEAKER.
DE1028709B (en) Temperature compensation device for permanent magnet systems
GB1174414A (en) Chromium-Semi-Killed Steel
GB1004205A (en) A zirconium alloy
DE660864C (en) Magnet system with permanent magnets
DE847467C (en) Permanent magnet made of steel powder and process for its manufacture
GB1076129A (en) Improvements in or relating to austenitic stainless steel
GB1161615A (en) Improvements in Copper-Nickel Alloys
SU491461A1 (en) Electrospark alloying method for metal parts
CH336913A (en) Method for limiting the magnetic flux leakage in magnetic systems with constant polarity and magnetic system for carrying out this method
DE1681054U (en) BRAKE MAGNET FOR ELECTRICITY COUNTER.
DE1524881U (en)
DE1928638A1 (en) Permanent magnet system for speakers
DE1683983U (en) GRINDING HEAD WITH ONE OR MORE GRINDING WHEELS.
DE1800423U (en) COIL FASTENING FOR LOAD LIFTING MAGNETS.
GB890971A (en) Brazing alloy