GB429740A - Improvements in the recording and reproduction of acoustic vibrations - Google Patents

Improvements in the recording and reproduction of acoustic vibrations

Info

Publication number
GB429740A
GB429740A GB35815/34A GB3581534A GB429740A GB 429740 A GB429740 A GB 429740A GB 35815/34 A GB35815/34 A GB 35815/34A GB 3581534 A GB3581534 A GB 3581534A GB 429740 A GB429740 A GB 429740A
Authority
GB
United Kingdom
Prior art keywords
resonance frequency
recording
spindle
dec
whilst
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
GB35815/34A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB429740A publication Critical patent/GB429740A/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)
  • Moving Of Heads (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

429,740. Phonographic recorders and reproducers. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Dec. 13, 1934, No. 35815. Convention date. Dec. 15, 1933. [Class 40 (iv)] Electrical sound recording and reproducing apparatus is provided with means for adjusting the resonance frequency of the vibratory system to at least 1000 cycles per second whilst recording and to a value below 100 and preferably below 50 whilst reproducing. As shown, the pivoted armature 1 carrying the stylus is carried by a hollow spindle 3 secured to rubber cushions 14 which provide a low resonance frequency, and the ends of the spindle 3 may be clamped between conical plugs 7, to provide a high resonance frequency. The plugs 7 slide in square bearings 9 and are adjusted by turning a spindle 10 provided with opposite screw-threads.
GB35815/34A 1933-12-15 1934-12-13 Improvements in the recording and reproduction of acoustic vibrations Expired GB429740A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN36080D DE628732C (en) 1933-12-15 1933-12-15 Vibration converter for electromechanical sound recording or sound pickup

Publications (1)

Publication Number Publication Date
GB429740A true GB429740A (en) 1935-06-05

Family

ID=6477652

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35815/34A Expired GB429740A (en) 1933-12-15 1934-12-13 Improvements in the recording and reproduction of acoustic vibrations

Country Status (5)

Country Link
US (1) US2072610A (en)
DE (1) DE628732C (en)
FR (1) FR782725A (en)
GB (1) GB429740A (en)
NL (1) NL71775B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502717A (en) * 1942-09-03 1950-04-04 Hartford Nat Bank & Trust Co Antivibrational mounting for a variable tuning condenser on a radio apparatus
US2451221A (en) * 1944-10-30 1948-10-12 William H Hutter Wedged needle type phonograph pickup
DK156358C (en) * 1986-12-19 1990-01-02 Ortofon Mfg As PICKUP WITH EXCHANGEABLE PART

Also Published As

Publication number Publication date
FR782725A (en) 1935-06-11
NL71775B (en)
DE628732C (en) 1936-04-14
US2072610A (en) 1937-03-02

Similar Documents

Publication Publication Date Title
US2105916A (en) Sound reproducing system
US2273866A (en) Stereophonic sound recording and reproduction
GB429740A (en) Improvements in the recording and reproduction of acoustic vibrations
US2568797A (en) Microphonic suppression system for electric phonographs
US2014528A (en) Sound recording and reproducing system
US2251300A (en) Telegraphone and like apparatus
US1827051A (en) Recording and reproducing system and apparatus
GB445765A (en) Improved method and device for the reproduction of sound
GB686777A (en) Improvements in electrical sound recording and reproducing apparatus
US3024309A (en) Kleis
US3176072A (en) Stereophonic reproduction system
GB943321A (en) Improvements in earphones
US1661539A (en) Phonograph system
US2549757A (en) Reproducing device having link means for producing high compliance in the direction of the stylus drag
US1713039A (en) Phonograph recording and reproducing
US1508432A (en) Sound recording and reproducing apparatus
Davis et al. The Westrex stereo disk system
US2567582A (en) Magnetic recording and reproducing system
Neely et al. Modern Instantaneous Recording and its Reproduction
GB501259A (en) Improved device for the mechanical recording of sound and like oscillations
US1895178A (en) Arrangement for producing phonograph records
Thompson The Re-Recording of Wax Cylinders
GB850259A (en) Binaural phonograph pickup
GB775050A (en) Improvements in or relating to methods of recording signals
SU41713A1 (en) Method for increasing the playing time of gramophone records