GB652026A - Improvements relating to electro-magnetic pick-ups - Google Patents

Improvements relating to electro-magnetic pick-ups

Info

Publication number
GB652026A
GB652026A GB3114448A GB3114448A GB652026A GB 652026 A GB652026 A GB 652026A GB 3114448 A GB3114448 A GB 3114448A GB 3114448 A GB3114448 A GB 3114448A GB 652026 A GB652026 A GB 652026A
Authority
GB
United Kingdom
Prior art keywords
armature
pole
pieces
ups
electro
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
GB3114448A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB3114448A priority Critical patent/GB652026A/en
Publication of GB652026A publication Critical patent/GB652026A/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
    • H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Dc Machiner (AREA)

Abstract

652,026. Gramophone pick-ups. BRITISH THOMSON - HOUSTON CO., Ltd., and BOCOCK, W. A. Dec. 1, 1948, No. 31144. [Class 40 (iv)] In a balanced armature pick-up, a permanent magnet bar 1 has pole extensions 2, 3 secured to its ends which are shaped to provide two pairs of co-operating pole-pieces. An armature 9 is pivoted between the lower polepieces by a rubber-sheathed cross-arm 8 which carries a fixing screw 20 for a stylus 10. The upper end of the armature is centralized by a resilient strip 14 which engages a notch 15 in the armature and extensions 18 of a bracket 16 screwed to the upper pole-pieces. A further bracket (not shown), screwed to the lower polepieces, holds the armature in position and a coil (not shown) surrounding the armature is located between the two pairs of pole-pieces.
GB3114448A 1948-12-01 1948-12-01 Improvements relating to electro-magnetic pick-ups Expired GB652026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3114448A GB652026A (en) 1948-12-01 1948-12-01 Improvements relating to electro-magnetic pick-ups

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3114448A GB652026A (en) 1948-12-01 1948-12-01 Improvements relating to electro-magnetic pick-ups

Publications (1)

Publication Number Publication Date
GB652026A true GB652026A (en) 1951-04-11

Family

ID=10318667

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3114448A Expired GB652026A (en) 1948-12-01 1948-12-01 Improvements relating to electro-magnetic pick-ups

Country Status (1)

Country Link
GB (1) GB652026A (en)

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