GB553391A - Improvements in and relating to magnet systems for telephone receivers and like instruments - Google Patents

Improvements in and relating to magnet systems for telephone receivers and like instruments

Info

Publication number
GB553391A
GB553391A GB226742A GB226742A GB553391A GB 553391 A GB553391 A GB 553391A GB 226742 A GB226742 A GB 226742A GB 226742 A GB226742 A GB 226742A GB 553391 A GB553391 A GB 553391A
Authority
GB
United Kingdom
Prior art keywords
plate
instruments
relating
diaphragm
pole
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
GB226742A
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.)
REUBEN HENRY DENT
Original Assignee
REUBEN HENRY DENT
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 REUBEN HENRY DENT filed Critical REUBEN HENRY DENT
Priority to GB226742A priority Critical patent/GB553391A/en
Publication of GB553391A publication Critical patent/GB553391A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Landscapes

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

Abstract

553,391. Telephone instruments. DENT, R. H., and WOLFF, J. Feb. 20, 1942. Nos. 2267/42 and 2883/43. [Class 40 (iv)] A magnet system for an acoustic receiver comprises two permanent magnets 9, 10 arranged between the ends of soft-iron plates 1, 2, a pole-piece 6 secured to one plate and extending with clearance into an opening 7 in the other, and a coil 11 located between the plates 1 and 2 and the magnets and surrounding the pole-piece. One magnet may be of cobalt and the other of alnico steel. The diaphragm 18 may be placed over a damping-plate 16 having a central opening 17 to receive a flanged portion 8 of the plate 1. Acoustic leakage from the space between the diaphragm and the plate is provided by a hole 21 in the latter, which is covered by a layer of silk between wire gauze layers.
GB226742A 1942-02-20 1942-02-20 Improvements in and relating to magnet systems for telephone receivers and like instruments Expired GB553391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB226742A GB553391A (en) 1942-02-20 1942-02-20 Improvements in and relating to magnet systems for telephone receivers and like instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB226742A GB553391A (en) 1942-02-20 1942-02-20 Improvements in and relating to magnet systems for telephone receivers and like instruments

Publications (1)

Publication Number Publication Date
GB553391A true GB553391A (en) 1943-05-19

Family

ID=9736554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB226742A Expired GB553391A (en) 1942-02-20 1942-02-20 Improvements in and relating to magnet systems for telephone receivers and like instruments

Country Status (1)

Country Link
GB (1) GB553391A (en)

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