GB120734A - Improvements in Telephone Transmitters. - Google Patents

Improvements in Telephone Transmitters.

Info

Publication number
GB120734A
GB120734A GB18511/18A GB1851118A GB120734A GB 120734 A GB120734 A GB 120734A GB 18511/18 A GB18511/18 A GB 18511/18A GB 1851118 A GB1851118 A GB 1851118A GB 120734 A GB120734 A GB 120734A
Authority
GB
United Kingdom
Prior art keywords
electrodes
electrode
diaphragm
rod
threaded rod
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
GB18511/18A
Inventor
Johan Skinderviken
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
Publication of GB120734A publication Critical patent/GB120734A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

120,734. Skinderviken, J. Nov. 7, 1917, [Convention date]. Microphones and variable-resistance transmitters.-The electrodes of a loose-contact transmitter are provided with curved surfaces and are so arranged that the protruding portion of an electrode is contained within the receding portion of the other. The electrodes are both mounted on the diaphragm or the microphone cell is vibrated directly by the sound waves. In the arrangement shown in Fig. 2, a plated spherical electrode 4 is placed within a hollow plated spherical electrode 5 and both electrodes are supported from an insulated ring 13 by a rod 8. The rod 8 is insulated from the electrode 5 by a sleeve 9 and the space 6 between the electrodes 4 and 5 is partly filled with carbon granules. In the modification shown in Fig. 3, the electrodes 4 and 5 are mounted on a diaphragm 15 and secured thereto by the threaded rod 8 and a nut 16. In the modification shown in Fig. 4, a conical electrode 18 is mounted upon a mica disk 22 which closes a hollow conical electrode 19, and the microphone cell is attached to the diaphragm 24 by a threaded rod 23.
GB18511/18A 1917-11-07 1918-11-12 Improvements in Telephone Transmitters. Expired GB120734A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US120734XA 1917-11-07 1917-11-07

Publications (1)

Publication Number Publication Date
GB120734A true GB120734A (en) 1919-11-12

Family

ID=32391549

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18511/18A Expired GB120734A (en) 1917-11-07 1918-11-12 Improvements in Telephone Transmitters.

Country Status (2)

Country Link
FR (1) FR493579A (en)
GB (1) GB120734A (en)

Also Published As

Publication number Publication date
FR493579A (en) 1919-08-13

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