GB233733A - Improvements in or relating to telephone instruments - Google Patents

Improvements in or relating to telephone instruments

Info

Publication number
GB233733A
GB233733A GB12234/25A GB1223425A GB233733A GB 233733 A GB233733 A GB 233733A GB 12234/25 A GB12234/25 A GB 12234/25A GB 1223425 A GB1223425 A GB 1223425A GB 233733 A GB233733 A GB 233733A
Authority
GB
United Kingdom
Prior art keywords
relating
telephone instruments
armature
extensions
magnets
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
GB12234/25A
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.)
Neufeldt & Kuhnke
Original Assignee
Neufeldt & Kuhnke
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 Neufeldt & Kuhnke filed Critical Neufeldt & Kuhnke
Publication of GB233733A publication Critical patent/GB233733A/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

Abstract

233,733. Neufeldt & Kuhnke. May 12, 1924, [Convention date]. Magnets.-The magnetic system of a telephone instrument comprises permanent magnets 1, 2 holding between them pole-shoes 3, 4 having polar extensions 5, 6 and 7, 8 respectively. An armature 9 is supported between the extensions and the permanent field passes in opposite directions across the ends of the armature.
GB12234/25A 1924-05-12 1925-05-11 Improvements in or relating to telephone instruments Expired GB233733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE233733X 1924-05-12

Publications (1)

Publication Number Publication Date
GB233733A true GB233733A (en) 1926-06-24

Family

ID=5887717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12234/25A Expired GB233733A (en) 1924-05-12 1925-05-11 Improvements in or relating to telephone instruments

Country Status (1)

Country Link
GB (1) GB233733A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002057A (en) * 1956-03-29 1961-09-26 Vigren Sten Daniel Polarized electromagnetic device
GB2267512A (en) * 1992-05-21 1993-12-08 Vontec Racket strings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002057A (en) * 1956-03-29 1961-09-26 Vigren Sten Daniel Polarized electromagnetic device
GB2267512A (en) * 1992-05-21 1993-12-08 Vontec Racket strings

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