FR858268A - Improvements to electro-acoustic transmitters and similar devices - Google Patents

Improvements to electro-acoustic transmitters and similar devices

Info

Publication number
FR858268A
FR858268A FR858268DA FR858268A FR 858268 A FR858268 A FR 858268A FR 858268D A FR858268D A FR 858268DA FR 858268 A FR858268 A FR 858268A
Authority
FR
France
Prior art keywords
electro
similar devices
acoustic transmitters
transmitters
acoustic
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
Other languages
French (fr)
Inventor
Donald Orr Sproule
Arthur Joseph Hughes
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.)
Henry Hugues & Son
Original Assignee
Henry Hugues & Son
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 Henry Hugues & Son filed Critical Henry Hugues & Son
Application granted granted Critical
Publication of FR858268A publication Critical patent/FR858268A/en
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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR858268D 1938-05-04 1939-05-01 Improvements to electro-acoustic transmitters and similar devices Expired FR858268A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858268X 1938-05-04

Publications (1)

Publication Number Publication Date
FR858268A true FR858268A (en) 1940-11-21

Family

ID=10590715

Family Applications (1)

Application Number Title Priority Date Filing Date
FR858268D Expired FR858268A (en) 1938-05-04 1939-05-01 Improvements to electro-acoustic transmitters and similar devices

Country Status (3)

Country Link
BE (1) BE434080A (en)
FR (1) FR858268A (en)
NL (1) NL61472C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339820A2 (en) * 1988-04-26 1989-11-02 Saad Gabr Electromagnetic transducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339820A2 (en) * 1988-04-26 1989-11-02 Saad Gabr Electromagnetic transducer
EP0339820A3 (en) * 1988-04-26 1991-03-20 Saad Gabr Electromagnetic transducer

Also Published As

Publication number Publication date
NL61472C (en)
BE434080A (en)

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