GB222239A - Improvements in or connected with telephone receivers - Google Patents

Improvements in or connected with telephone receivers

Info

Publication number
GB222239A
GB222239A GB1762523A GB1762523A GB222239A GB 222239 A GB222239 A GB 222239A GB 1762523 A GB1762523 A GB 1762523A GB 1762523 A GB1762523 A GB 1762523A GB 222239 A GB222239 A GB 222239A
Authority
GB
United Kingdom
Prior art keywords
feet
secured
magnet
pole
pieces
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
GB1762523A
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
Priority to GB1762523A priority Critical patent/GB222239A/en
Publication of GB222239A publication Critical patent/GB222239A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R13/00Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Magnetic Treatment Devices (AREA)

Abstract

222,239. Marr, A. July 7, 1923. Magnetic instruments.-In a telephone receiver, the polepieces 7, Figs. 2 and 3, tor permanent magnets of ring or horse-shoe type, are formed from blanks each comprising a narrow portion 8 and a lateral enlargement 9 which forms the vertical limbs to carry the winding. The portions 8 can be bent at any angle to the vertical plane to lie against the ends of the permanent magnet 10. The pole-pieces are clamped in position by a plate 11 secured to the casing by a screw 13, the ends of the plate being flanged to press the feet 8 against the ends of the magnet. In a modification, they are secured by a bow or other spring sprung into position between the feet. The permanent magnet may be secured in position by one or more grub screws or by a split ring. The terminals to which the conductors are connected may be arranged on a strip 17 of insulating material mounted across the magnet 10 or across the feet of the pole-pieces.
GB1762523A 1923-07-07 1923-07-07 Improvements in or connected with telephone receivers Expired GB222239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1762523A GB222239A (en) 1923-07-07 1923-07-07 Improvements in or connected with telephone receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1762523A GB222239A (en) 1923-07-07 1923-07-07 Improvements in or connected with telephone receivers

Publications (1)

Publication Number Publication Date
GB222239A true GB222239A (en) 1924-10-02

Family

ID=10098395

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1762523A Expired GB222239A (en) 1923-07-07 1923-07-07 Improvements in or connected with telephone receivers

Country Status (1)

Country Link
GB (1) GB222239A (en)

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