GB190807493A - Improvements in Telephonic Transmitters or Relays. - Google Patents

Improvements in Telephonic Transmitters or Relays.

Info

Publication number
GB190807493A
GB190807493A GB190807493DA GB190807493A GB 190807493 A GB190807493 A GB 190807493A GB 190807493D A GB190807493D A GB 190807493DA GB 190807493 A GB190807493 A GB 190807493A
Authority
GB
United Kingdom
Prior art keywords
relays
core
calling
telephonic
wireless
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
Reginald Aubrey Fessenden
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 GB190807493A publication Critical patent/GB190807493A/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
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

7493. Fessenden, R. A. April 5, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. TransformersÀ- In the telephone induction coil shown, the core 22 is a ring having an 'air-gap adjustable by means of a wedge 25, whereby the strength of the magnetic flux in the core may be regulated. Wireless telegraphy.- A telephonic relay is stated to be applicable for wireless calling, by sufficiently amplifying the weak calling- currents.
GB190807493D 1907-04-05 1908-04-04 Improvements in Telephonic Transmitters or Relays. Expired GB190807493A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US190807493XA 1907-04-05 1907-04-05

Publications (1)

Publication Number Publication Date
GB190807493A true GB190807493A (en) 1908-09-17

Family

ID=32231452

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190807493D Expired GB190807493A (en) 1907-04-05 1908-04-04 Improvements in Telephonic Transmitters or Relays.

Country Status (1)

Country Link
GB (1) GB190807493A (en)

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