GB190925028A - Improvements in Telephone Transmitters. - Google Patents

Improvements in Telephone Transmitters.

Info

Publication number
GB190925028A
GB190925028A GB190925028DA GB190925028A GB 190925028 A GB190925028 A GB 190925028A GB 190925028D A GB190925028D A GB 190925028DA GB 190925028 A GB190925028 A GB 190925028A
Authority
GB
United Kingdom
Prior art keywords
carbon
stud
telephone transmitters
moloney
ross
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
Inventor
Matthew Moloney
John Ross
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 GB190925028A publication Critical patent/GB190925028A/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)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

25,028. Moloney, M., and Ross, J. Oct. 30. Microphones.-The carbon cup 3 carries carbon pencils 4 projecting into a groove in the carbon stud 7, and a layer 18 of grains of carbon is placed between the carbon washers 16, 17, which are carried on the stud. The stud projects into the granules 22 to a point near the diaphragm.
GB190925028D 1909-10-30 1909-10-30 Improvements in Telephone Transmitters. Expired GB190925028A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190925028T 1909-10-30

Publications (1)

Publication Number Publication Date
GB190925028A true GB190925028A (en) 1910-01-21

Family

ID=32558642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190925028D Expired GB190925028A (en) 1909-10-30 1909-10-30 Improvements in Telephone Transmitters.

Country Status (2)

Country Link
FR (1) FR408577A (en)
GB (1) GB190925028A (en)

Also Published As

Publication number Publication date
FR408577A (en)

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