GB161277A - Improvements in and relating to telephone transmitters - Google Patents

Improvements in and relating to telephone transmitters

Info

Publication number
GB161277A
GB161277A GB431/20A GB43120A GB161277A GB 161277 A GB161277 A GB 161277A GB 431/20 A GB431/20 A GB 431/20A GB 43120 A GB43120 A GB 43120A GB 161277 A GB161277 A GB 161277A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
oblique
electrodes
plane
sides
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
GB431/20A
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.)
Philips North America LLC
Original Assignee
Magnavox Co
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 Magnavox Co filed Critical Magnavox Co
Priority to GB431/20A priority Critical patent/GB161277A/en
Priority to FR508443A priority patent/FR508443A/en
Publication of GB161277A publication Critical patent/GB161277A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

161,277. Feeny, V. F., (Magnavox Co.). Jan. 6, 1920. Transmitters; mouthpieces.-In a transmitter in which both sides of the diaphragm are exposed to sounds, the electrodes are protected from damp and mechanical injury, and their plane is oblique to that of the diaphragm so that the instrument functions in either a vertical or a horizontal position. The button 1 containing the electrodes is mounted in a watertight casing 13, and is carried by a bushing 3 which holds the shank 2. Its plane is oblique to that of the diaphragm, to which it is connected by a pin 12 passing through a water-tight hole in a gasket 18 which acts as an acoustic insulator and is free enough not to impede the vibrations. The diaphragm is held in position by clamping springs 17, and is enclosed in a chamber which is perforated to admit sound on both sides. Specification 133,365 is referred to.
GB431/20A 1920-01-06 1920-01-06 Improvements in and relating to telephone transmitters Expired GB161277A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB431/20A GB161277A (en) 1920-01-06 1920-01-06 Improvements in and relating to telephone transmitters
FR508443A FR508443A (en) 1920-01-06 1920-01-15 Improvements to telephone transmitters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB431/20A GB161277A (en) 1920-01-06 1920-01-06 Improvements in and relating to telephone transmitters
FR508443T 1920-01-15

Publications (1)

Publication Number Publication Date
GB161277A true GB161277A (en) 1921-04-06

Family

ID=9704215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB431/20A Expired GB161277A (en) 1920-01-06 1920-01-06 Improvements in and relating to telephone transmitters

Country Status (2)

Country Link
FR (1) FR508443A (en)
GB (1) GB161277A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2541621B2 (en) * 1988-04-20 1996-10-09 株式会社プリモ Directional microphone

Also Published As

Publication number Publication date
FR508443A (en) 1920-10-11

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