GB191121812A - Improvements in or relating to Telephone Instruments. - Google Patents

Improvements in or relating to Telephone Instruments.

Info

Publication number
GB191121812A
GB191121812A GB191121812DA GB191121812A GB 191121812 A GB191121812 A GB 191121812A GB 191121812D A GB191121812D A GB 191121812DA GB 191121812 A GB191121812 A GB 191121812A
Authority
GB
United Kingdom
Prior art keywords
armature
diaphragm
screw
magnet
connexion
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
English (en)
Inventor
Walter Howley Derriman
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 GB191121812A publication Critical patent/GB191121812A/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
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/06—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
GB191121812D 1911-10-03 1911-10-03 Improvements in or relating to Telephone Instruments. Expired GB191121812A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191121812T 1911-10-03

Publications (1)

Publication Number Publication Date
GB191121812A true GB191121812A (en) 1912-10-03

Family

ID=32567485

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191121812D Expired GB191121812A (en) 1911-10-03 1911-10-03 Improvements in or relating to Telephone Instruments.

Country Status (2)

Country Link
DE (1) DE259071C (enrdf_load_stackoverflow)
GB (1) GB191121812A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE259071C (enrdf_load_stackoverflow)

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