GB336648A - Improvements in and relating to electrical sound reproducing instruments - Google Patents

Improvements in and relating to electrical sound reproducing instruments

Info

Publication number
GB336648A
GB336648A GB2168729A GB2168729A GB336648A GB 336648 A GB336648 A GB 336648A GB 2168729 A GB2168729 A GB 2168729A GB 2168729 A GB2168729 A GB 2168729A GB 336648 A GB336648 A GB 336648A
Authority
GB
United Kingdom
Prior art keywords
armature
stylus
tube
coils
spindle
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
GB2168729A
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 GB2168729A priority Critical patent/GB336648A/en
Publication of GB336648A publication Critical patent/GB336648A/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

336,648. Holman, H. E. July 15, 1929. Gramophone pick - ups; magnetic instruments.-The armature of a gramophone pick-up is formed by a permanent magnet having a stylus engaging parts so shaped as to hold the stylus securely in position, during operation, due to the reaction between the stylus and the record. The armature a, Fig. 1, consists of a tube of highly magnetic material, e.g. cobalt steel, and the stylus b is located at one end e in a V-shaped or other opening f, Fig. 2, and at the other end c in a narrowed portion of the armature tube provided by a bush d, Fig. 1; or the tube may be reduced or swaged in as at c, Fig. 3. The magnetized armature holds the stylus in position when not recording. The armature is preferably mounted in a stirrup g, Fig. 5, provided with radial arms h which are clamped as in Fig. 3; or a spindle may be bored in the middle to receive the armature and the spindle clamped between rubber pads. The magnetized armature oscillates relatively to coils m, Fig. 8, mounted on supports n; or the coils m may be disposed on arms of an iron circuit o, Fig. 10. Specification 302,216, [Class 40 (ii), Phonographs &c.], is referred to.
GB2168729A 1929-07-15 1929-07-15 Improvements in and relating to electrical sound reproducing instruments Expired GB336648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2168729A GB336648A (en) 1929-07-15 1929-07-15 Improvements in and relating to electrical sound reproducing instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2168729A GB336648A (en) 1929-07-15 1929-07-15 Improvements in and relating to electrical sound reproducing instruments

Publications (1)

Publication Number Publication Date
GB336648A true GB336648A (en) 1930-10-15

Family

ID=10167138

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2168729A Expired GB336648A (en) 1929-07-15 1929-07-15 Improvements in and relating to electrical sound reproducing instruments

Country Status (1)

Country Link
GB (1) GB336648A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501233A (en) * 1945-03-14 1950-03-21 Decca Record Co Ltd Phonograph pickup having permanent magnet armature
US2507708A (en) * 1945-12-22 1950-05-16 Pennsylvania Electronics Inc Phonograph pickup having permanent magnet armature
US2581511A (en) * 1947-12-31 1952-01-08 Donald J Baker Magnetic phonograph pickup
US3055988A (en) * 1957-04-08 1962-09-25 Shure Bros Magnetic phonograph pickup
US3077521A (en) * 1958-03-06 1963-02-12 Shure Bros Stereophonic moving magnet phonograph pickup
US3077522A (en) * 1959-02-27 1963-02-12 Shure Bros Stereophonic pickup cartridge
US3463889A (en) * 1957-10-30 1969-08-26 Shure Bros Moving magnet stereophonic pickup
US3576956A (en) * 1958-06-20 1971-05-04 Philips Corp Stereophonic phonograph transducer
US3614332A (en) * 1958-10-03 1971-10-19 Motohiro Nagasaki Electromagnetic stereophonic phonograph pickup

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501233A (en) * 1945-03-14 1950-03-21 Decca Record Co Ltd Phonograph pickup having permanent magnet armature
US2507708A (en) * 1945-12-22 1950-05-16 Pennsylvania Electronics Inc Phonograph pickup having permanent magnet armature
US2581511A (en) * 1947-12-31 1952-01-08 Donald J Baker Magnetic phonograph pickup
US3055988A (en) * 1957-04-08 1962-09-25 Shure Bros Magnetic phonograph pickup
US3463889A (en) * 1957-10-30 1969-08-26 Shure Bros Moving magnet stereophonic pickup
US3077521A (en) * 1958-03-06 1963-02-12 Shure Bros Stereophonic moving magnet phonograph pickup
US3576956A (en) * 1958-06-20 1971-05-04 Philips Corp Stereophonic phonograph transducer
US3614332A (en) * 1958-10-03 1971-10-19 Motohiro Nagasaki Electromagnetic stereophonic phonograph pickup
US3077522A (en) * 1959-02-27 1963-02-12 Shure Bros Stereophonic pickup cartridge

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