GB327989A - Improvements in or relating to gramophone records - Google Patents

Improvements in or relating to gramophone records

Info

Publication number
GB327989A
GB327989A GB3590828A GB3590828A GB327989A GB 327989 A GB327989 A GB 327989A GB 3590828 A GB3590828 A GB 3590828A GB 3590828 A GB3590828 A GB 3590828A GB 327989 A GB327989 A GB 327989A
Authority
GB
United Kingdom
Prior art keywords
strip
pair
armature
members
relating
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
GB3590828A
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 GB3590828A priority Critical patent/GB327989A/en
Publication of GB327989A publication Critical patent/GB327989A/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)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Abstract

327,989. Round, H. J. Dec. 5, 1928. Phonographic recorders.-A recording instrument comprises a cutter having a very rigid armature with a natural period of 5,000 cycles per second, the armature being suitably damped. The Figure shows a recorder in which a steel block 2 carries a short steel strip 1 to which a sapphire or the like 2a is attached, e.g. by binding and sticking with shellac. The strip, which is weakened at 2<b> in order that it may have the required high natural frequency, is surrounded by a coil 6, and vibrates between a pair of polar screws 3b, 4b. These, together with similar members 3a, 4a, pass through members 3, 4 which are extensions of a polarizing magnet 5. A pair of rubber-tipped brass pieces 7 are arranged to be screwed into contact with the strip 1, to provide the necessary damping. The whole system is pivotally mounted in known manner.
GB3590828A 1928-12-05 1928-12-05 Improvements in or relating to gramophone records Expired GB327989A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3590828A GB327989A (en) 1928-12-05 1928-12-05 Improvements in or relating to gramophone records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3590828A GB327989A (en) 1928-12-05 1928-12-05 Improvements in or relating to gramophone records

Publications (1)

Publication Number Publication Date
GB327989A true GB327989A (en) 1930-04-07

Family

ID=10382876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3590828A Expired GB327989A (en) 1928-12-05 1928-12-05 Improvements in or relating to gramophone records

Country Status (1)

Country Link
GB (1) GB327989A (en)

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