GB147153A - Telephones - Google Patents

Telephones

Info

Publication number
GB147153A
GB147153A GB19205/20A GB1920520A GB147153A GB 147153 A GB147153 A GB 147153A GB 19205/20 A GB19205/20 A GB 19205/20A GB 1920520 A GB1920520 A GB 1920520A GB 147153 A GB147153 A GB 147153A
Authority
GB
United Kingdom
Prior art keywords
pole
pieces
telephone
telephones
extensions
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
GB19205/20A
Other languages
English (en)
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 GB147153A publication Critical patent/GB147153A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02—Telephone receivers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/48—Nozzles

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
GB19205/20A 1916-03-01 1920-07-07 Telephones Expired GB147153A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE147153X 1916-03-01

Publications (1)

Publication Number Publication Date
GB147153A true GB147153A (en) 1921-10-07

Family

ID=5671823

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19205/20A Expired GB147153A (en) 1916-03-01 1920-07-07 Telephones

Country Status (2)

Country Link
DE (1) DE301391C (https=)
GB (1) GB147153A (https=)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE947083C (de) * 1952-10-01 1956-08-09 Standard Elek K Ag Elektromagnetisches Schallgeraet in Kapselform
DE943357C (de) * 1952-11-25 1956-05-17 Telefonbau & Normalzeit Gmbh Elektroakustischer Wandler, insbesondere Hoererkapsel fuer Mikrotelefone von Fernsprechapparaten
GB784147A (en) * 1954-11-08 1957-10-02 Goodmans Ind Ltd Improvements in or relating to moving coil type sound reproducing devices

Also Published As

Publication number Publication date
DE301391C (https=)

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