GB765621A - Improvements in or relating to gramophone pick-ups comprising at least two needles which are externally damped - Google Patents

Improvements in or relating to gramophone pick-ups comprising at least two needles which are externally damped

Info

Publication number
GB765621A
GB765621A GB6625/55A GB662555A GB765621A GB 765621 A GB765621 A GB 765621A GB 6625/55 A GB6625/55 A GB 6625/55A GB 662555 A GB662555 A GB 662555A GB 765621 A GB765621 A GB 765621A
Authority
GB
United Kingdom
Prior art keywords
needles
pick
ups
groove
gramophone
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
GB6625/55A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB765621A publication Critical patent/GB765621A/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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/16—Mounting or connecting stylus to transducer with or without damping means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R17/06—Gramophone pick-ups using a stylus; Recorders using a stylus comprising two or more styli or transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

765,621. Gramophone pick-ups. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 7, 1955 [March 10, 1954], No. 6625/55. Class 40 (2). [Also in Group XXXIX] A gramophone pick-up comprising at least two sound record resilient reproducing needles 2, 3, e.g. for use with normal and micro-groove disc records, each arranged to be alternately operative in a record groove or inoperative and connected via a respective vibratory element 5 to a common transducing element 6, has the needles directly interconnected by a tie member 11 consisting entirely or in part of vibratory clamping material disposed externally of the pick-up housing 1 to eliminate undesired movements of the inoperative needle. As shown, the pick-up has two needles which are tipped with sapphires 4 and have the tie member 11 secured adjacent their groove-engaging ends, and the transducing element 6 is a crystal gripped in the body at 7 and is twisted, in operation, in bearings 9, 10.
GB6625/55A 1954-03-10 1955-03-07 Improvements in or relating to gramophone pick-ups comprising at least two needles which are externally damped Expired GB765621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL185764 1954-03-10

Publications (1)

Publication Number Publication Date
GB765621A true GB765621A (en) 1957-01-09

Family

ID=19750656

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6625/55A Expired GB765621A (en) 1954-03-10 1955-03-07 Improvements in or relating to gramophone pick-ups comprising at least two needles which are externally damped

Country Status (7)

Country Link
US (1) US2868893A (en)
BE (1) BE536330A (en)
CH (1) CH327013A (en)
DE (1) DE962653C (en)
FR (1) FR1120394A (en)
GB (1) GB765621A (en)
NL (1) NL87749C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054727B (en) * 1955-05-04 1959-04-09 Funkwerk Leipzig Veb Piezoelectric pickup system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563860A (en) * 1946-10-11 1951-08-14 Gray Mfg Co Sound recording and reproducing head
US2570578A (en) * 1949-03-11 1951-10-09 Magnavox Co Dual stylus phonograph pickup
US2777016A (en) * 1952-12-19 1957-01-08 Electro Voice Dual needle phonograph cartridge

Also Published As

Publication number Publication date
CH327013A (en) 1958-01-15
DE962653C (en) 1957-04-25
US2868893A (en) 1959-01-13
FR1120394A (en) 1956-07-04
NL87749C (en)
BE536330A (en)

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