GB276466A - Improvements in or relating to methods of and means for reproducing or recording sounds - Google Patents

Improvements in or relating to methods of and means for reproducing or recording sounds

Info

Publication number
GB276466A
GB276466A GB1546526A GB1546526A GB276466A GB 276466 A GB276466 A GB 276466A GB 1546526 A GB1546526 A GB 1546526A GB 1546526 A GB1546526 A GB 1546526A GB 276466 A GB276466 A GB 276466A
Authority
GB
United Kingdom
Prior art keywords
needle
pole
magnetic
pole tip
poles
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
GB1546526A
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.)
RADIO COMM CO Ltd
Original Assignee
RADIO COMM 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 RADIO COMM CO Ltd filed Critical RADIO COMM CO Ltd
Priority to GB1546526A priority Critical patent/GB276466A/en
Publication of GB276466A publication Critical patent/GB276466A/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)
  • Magnetic Heads (AREA)

Abstract

276,466. Lea, N., and Radio Communication Co., Ltd. June 19, 1926. Magnetic instruments.-In an electromagnetic device for recording sound or for reproducing sound from a record, the mass of the vibrating system comprises only the needle or stylus forming part of the magnetic circuit and that portion of a rubber or like substantially non-resonant supporting member which is in contact with the needle or stylus. In the construction, Fig. 1, the gramophone needle N is held by a tube T of rubber &c. in a hole in a non-magnetic bridge B fixed to the magnets M and carrying two pole tips P<1>, P<2> forming extensions of the poles of the magnet M. One pole tip P<1> extends the full width and the other P<2> extends only half the width of the bridge piece B. In the modification, Fig. 3, the magnet is of E-shape having a common pole P<1> and two poles P<2>, P<3> of opposite sign to the common pole, the needle N being mounted in a tube T fixed in a hole in the pole tip P<1> or in a non-magnetic bridge piece carried by this pole tip.
GB1546526A 1926-06-19 1926-06-19 Improvements in or relating to methods of and means for reproducing or recording sounds Expired GB276466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1546526A GB276466A (en) 1926-06-19 1926-06-19 Improvements in or relating to methods of and means for reproducing or recording sounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1546526A GB276466A (en) 1926-06-19 1926-06-19 Improvements in or relating to methods of and means for reproducing or recording sounds

Publications (1)

Publication Number Publication Date
GB276466A true GB276466A (en) 1927-09-01

Family

ID=10059596

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1546526A Expired GB276466A (en) 1926-06-19 1926-06-19 Improvements in or relating to methods of and means for reproducing or recording sounds

Country Status (1)

Country Link
GB (1) GB276466A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535479A (en) * 1947-05-20 1950-12-26 Mallory & Co Inc P R Magnetic pickup
US2553573A (en) * 1947-04-30 1951-05-22 Farnsworth Res Corp Magnetic phonograph pickup having an armature support within the pickup coil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553573A (en) * 1947-04-30 1951-05-22 Farnsworth Res Corp Magnetic phonograph pickup having an armature support within the pickup coil
US2535479A (en) * 1947-05-20 1950-12-26 Mallory & Co Inc P R Magnetic pickup

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