GB289161A - Improvements in or relating to electromagnetic reproducers for use with gramophone and the like records - Google Patents

Improvements in or relating to electromagnetic reproducers for use with gramophone and the like records

Info

Publication number
GB289161A
GB289161A GB1961/27A GB196127A GB289161A GB 289161 A GB289161 A GB 289161A GB 1961/27 A GB1961/27 A GB 1961/27A GB 196127 A GB196127 A GB 196127A GB 289161 A GB289161 A GB 289161A
Authority
GB
United Kingdom
Prior art keywords
armature
records
electromagnetic
gramophone
rubber
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
GB1961/27A
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
Priority to BE342551D priority Critical patent/BE342551A/xx
Application filed by Individual filed Critical Individual
Priority to GB1961/27A priority patent/GB289161A/en
Priority to FR634147D priority patent/FR634147A/en
Priority to US195080A priority patent/US1711192A/en
Publication of GB289161A publication Critical patent/GB289161A/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)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)

Abstract

289,161. Woodroffe, J. B. Jan. 22, 1927. Magnetic instruments.-The armature 5 of an electromagnetic reproducer for playing gramophone and like records is pivotally mounted and the vibrations are damped by one or more rubber, leather or like straps 7 attached to the armature and to a fixed part 9 of the reproducer. The strap is attached at its centre to the armature and is carried on the fixed portion by adjustable pillars 8 so that the tension may be adjusted. The armature is further damped over a substantial length by rubber or like tubes or blocks 11 in contact with it and located between the armature and an arm 4 of adjustable effective length on which the armature is carried. The armature is actuated by a pair of electric coils 3 situated one above and one below the pivotal point 6 of the armature and both on the same side of the armature. According to a modification, the coils are on opposite sides of the armature.
GB1961/27A 1927-01-22 1927-01-22 Improvements in or relating to electromagnetic reproducers for use with gramophone and the like records Expired GB289161A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE342551D BE342551A (en) 1927-01-22
GB1961/27A GB289161A (en) 1927-01-22 1927-01-22 Improvements in or relating to electromagnetic reproducers for use with gramophone and the like records
FR634147D FR634147A (en) 1927-01-22 1927-05-11 Improvements relating to electromagnetic reproducers, used for gramophone records or the like
US195080A US1711192A (en) 1927-01-22 1927-05-28 Electromagnetic reproducer for use with gramophone and the like records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1961/27A GB289161A (en) 1927-01-22 1927-01-22 Improvements in or relating to electromagnetic reproducers for use with gramophone and the like records

Publications (1)

Publication Number Publication Date
GB289161A true GB289161A (en) 1928-04-23

Family

ID=9731093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1961/27A Expired GB289161A (en) 1927-01-22 1927-01-22 Improvements in or relating to electromagnetic reproducers for use with gramophone and the like records

Country Status (4)

Country Link
US (1) US1711192A (en)
BE (1) BE342551A (en)
FR (1) FR634147A (en)
GB (1) GB289161A (en)

Also Published As

Publication number Publication date
US1711192A (en) 1929-04-30
BE342551A (en)
FR634147A (en) 1928-02-09

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