GB191213157A - Improvements in Telephone Receivers. - Google Patents

Improvements in Telephone Receivers.

Info

Publication number
GB191213157A
GB191213157A GB191213157DA GB191213157A GB 191213157 A GB191213157 A GB 191213157A GB 191213157D A GB191213157D A GB 191213157DA GB 191213157 A GB191213157 A GB 191213157A
Authority
GB
United Kingdom
Prior art keywords
circuit
diaphragm
microphone
magnet
iron
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
Andrew Plecher
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 GB191213157A publication Critical patent/GB191213157A/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Telephone Set Structure (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

13,157. Plecher, A. June 4. Microphones; telephones; relays and repeaters, non-circuit-closing; telephones, mounting and supporting.-A telephone receiver which can also be used as a transmitter has its diaphragm so mounted that the marginal portions, upon which the magnet acts, are free to vibrate, these portions being split into tongues responsive to the different components of a sound, the centre of a diaphragm acting on a microphone in a local circuit to amplify the effect of the speaking currents. The diaphragm 22 is clamped between rings 24, 25, and the edges are cut into tongues 27 of different lengths as shown in Fig. 4. The magnet is formed of an iron ring 13, Fig. 2, with four coils, two inside and two out, one coil of each pair being connected in the line circuit, the others in circuit with a battery and the microphone 15; the local and line circuits are coupled together by an induction coil. Instead of a solid iron annulus 13, one formed of iron wire wound on a series of pins projecting from an iron ring may be used. The device may be used as a relay by placing a similar magnet and microphone, similarly connected up to a second circuit, on the other side of the diaphragm. Specification 3144/00 is referred to.
GB191213157D 1912-06-04 1912-06-04 Improvements in Telephone Receivers. Expired GB191213157A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191213157T 1912-06-04

Publications (1)

Publication Number Publication Date
GB191213157A true GB191213157A (en) 1913-07-04

Family

ID=32572701

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191213157D Expired GB191213157A (en) 1912-06-04 1912-06-04 Improvements in Telephone Receivers.

Country Status (2)

Country Link
DE (1) DE277864C (en)
GB (1) GB191213157A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05166575A (en) * 1991-11-08 1993-07-02 Sumitomo Electric Ind Ltd Method for stabilizing spot welding
JP3132287B2 (en) * 1994-04-27 2001-02-05 株式会社村田製作所 Terminals for electronic parts and equipment for manufacturing the same

Also Published As

Publication number Publication date
DE277864C (en)

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