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FR502421A - Transmetteur téléphonique - Google Patents

Transmetteur téléphonique

Info

Publication number
FR502421A
FR502421A FR502421A FR502421DA FR502421A FR 502421 A FR502421 A FR 502421A FR 502421 A FR502421 A FR 502421A FR 502421D A FR502421D A FR 502421DA FR 502421 A FR502421 A FR 502421A
Authority
FR
France
Prior art keywords
telephone transmitter
telephone
transmitter
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
FR502421A
Other languages
English (en)
Inventor
John Spence Timmons
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
Application granted granted Critical
Publication of FR502421A publication Critical patent/FR502421A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/14—Throat mountings for microphones
    • 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
    • H04M1/04—Supports for telephone transmitters or receivers
    • H04M1/05—Supports for telephone transmitters or receivers specially adapted for use on head, throat or breast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Telephone Set Structure (AREA)
FR502421A 1918-04-13 1919-08-08 Transmetteur téléphonique Expired FR502421A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US228311A US1329029A (en) 1918-04-13 1918-04-13 Telephone apparatus

Publications (1)

Publication Number Publication Date
FR502421A true FR502421A (fr) 1920-05-14

Family

ID=22856647

Family Applications (1)

Application Number Title Priority Date Filing Date
FR502421A Expired FR502421A (fr) 1918-04-13 1919-08-08 Transmetteur téléphonique

Country Status (3)

Country Link
US (1) US1329029A (fr)
DE (1) DE348389C (fr)
FR (1) FR502421A (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2062372A (en) * 1933-08-11 1936-12-01 Sonotone Corp Bone conduction hearing aid
DE750602C (de) * 1934-08-05 1945-01-20 Hans Von Baussen Elektrisches Stethoskop
US3218607A (en) * 1962-12-10 1965-11-16 Bendix Corp Underwater telephone
US4349081A (en) * 1980-12-08 1982-09-14 Audrey Pepple Method for retaining a hearing aid in place and hearing aid harness
USD410921S (en) * 1998-06-11 1999-06-15 Labtec, Inc. Headset microphone
US6179666B1 (en) * 1999-02-05 2001-01-30 Michael L. Osborn Two-way radio accessory quick connect and extension cord
US7310427B2 (en) * 2002-08-01 2007-12-18 Virginia Commonwealth University Recreational bone conduction audio device, system
US8542859B2 (en) * 2008-11-25 2013-09-24 Skullcandy, Inc. Interchangeable headphone audio system
US8553919B2 (en) * 2009-06-25 2013-10-08 Jerry Leigh Of California, Inc. Garment with built-in audio source wiring
US8107653B2 (en) * 2009-06-25 2012-01-31 Jerry Leigh Of California, Inc. Garment with built-in audio source wiring
US8687834B2 (en) * 2009-06-25 2014-04-01 Jerry Leigh Of California, Inc. Garment with built-in audio source wiring
US9237395B2 (en) 2009-11-25 2016-01-12 Skullcandy, Inc. Modular audio systems and related assemblies and methods
US9439467B2 (en) * 2012-01-24 2016-09-13 Skullcandy, Inc. Accessory structures for connection between straps and related methods

Also Published As

Publication number Publication date
US1329029A (en) 1920-01-27
DE348389C (de) 1922-02-07

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