GB599817A - Improvements in or relating to phonograph pick-up devices - Google Patents

Improvements in or relating to phonograph pick-up devices

Info

Publication number
GB599817A
GB599817A GB6677/45A GB667745A GB599817A GB 599817 A GB599817 A GB 599817A GB 6677/45 A GB6677/45 A GB 6677/45A GB 667745 A GB667745 A GB 667745A GB 599817 A GB599817 A GB 599817A
Authority
GB
United Kingdom
Prior art keywords
coil
stylus
magnetic material
phonograph pick
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
GB6677/45A
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.)
Philco Radio and Television Corp
Original Assignee
Philco Radio and Television Corp
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 Philco Radio and Television Corp filed Critical Philco Radio and Television Corp
Publication of GB599817A publication Critical patent/GB599817A/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
    • H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

599,817. Phonograph pick-ups. PHILCO RADIO & TELEVISION CORPORATION. March 16, 1945, No. 6677. Convention date, Sept. 8, 1944. [Class 40 (iv)] [Also.in Group XXXVIII] A phonograph pick-up, for varying the tuning of a resonant circuit in a frequency - modulation radio receiver, consists of a stylus 19, a coil 20, a cone 16 to transmit movement of the stylus 19 to the coil 20, and a core 10, within the coil 20, consisting of approximately equal parts 11 and 12 of highpermeability magnetic material and high conductivity non-magnetic material respectively, the coil 20 being flexibly mounted on a U- shaped member 15 of resilient material so that lateral variations of the stylus 19 produce a linear variation of inductance of the coil 20 due to variation of the amount of magnetic material within the coil 20. Specifications 558,680 and 586,979 are referred to.
GB6677/45A 1944-09-08 1945-03-16 Improvements in or relating to phonograph pick-up devices Expired GB599817A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US599817XA 1944-09-08 1944-09-08

Publications (1)

Publication Number Publication Date
GB599817A true GB599817A (en) 1948-03-22

Family

ID=22026570

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6677/45A Expired GB599817A (en) 1944-09-08 1945-03-16 Improvements in or relating to phonograph pick-up devices

Country Status (1)

Country Link
GB (1) GB599817A (en)

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