US3178520A - Binaural pick-up cartridge - Google Patents

Binaural pick-up cartridge Download PDF

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Publication number
US3178520A
US3178520A US757745A US75774558A US3178520A US 3178520 A US3178520 A US 3178520A US 757745 A US757745 A US 757745A US 75774558 A US75774558 A US 75774558A US 3178520 A US3178520 A US 3178520A
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US
United States
Prior art keywords
stylus
pick
strips
elements
arms
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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 - Lifetime
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US757745A
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English (en)
Inventor
Vries Machiel De
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.)
Ronette Piezo Electrische Industrie NV
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Ronette Piezo Electrische Industrie NV
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Publication date
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    • 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
    • H04R17/08—Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Definitions

  • This invention relates to a pick-up element comprising two transforming elements for converting mechanical into electrical vibrations, which transforming elements are each connected by means of a coupling member with common stylus holder carrying a stylus, a first portion of the one coup-ling member connected with the stylus holder enclosing at least substantially a right angle with a corresponding first portion of the other coupling memher.
  • a pick-up element of this type is adapted to be used for tracking records, more particularly gramophone records into which tracks provided with a double sound recording are cut.
  • the groove of such a gramophone record has two walls enclosing an angle of about 90 with each other.
  • a sound track is cut, which sound tracks are tracked by a needle or stylus.
  • the sound taken up by a separate microphone may be recorded in each of the tracks, the two microphones being arranged in spaced relationship, so that in this manner a stereopho-nical recording and reproduction of the sound can be effected.
  • a difiiculty encountered in arrangements of this type is that the movements of the needle which are normal to each other must be fully separated from each other if the desired effect is to be reached.
  • Another diificulty resides in the circumstance that a pick-up element of the type in question is to be provided with two transforming elements, eg piezoelectrical elements, so that the pick-up element will become rather large and heavy.
  • the object of the invention is to provide a construction which entirely eliminates these two difficulties.
  • the pick-up element according to the invention is so constructed that of the first coupling member portions the one ends are connected with each other and the other ends each with a second coupling member portion which is at least substantially normal relative to the associated first coupling member portion, the respective coupling member portions being so shaped and being made of such material that upon moving they-hinge relative to each other.
  • the pickup element may be so constructed that the one ends of the first coupling member portions are interconnected by an intermediate piece against which the stylus holder bears.
  • the coupling members and the intermediate piece may consist of one piece of relatively soft resilient material hav- 3,178,520 Patented Apr. 13, 1965 ing a relatively large internal damping, such as polyvinyl chloride.
  • the piece of resilient material may have a smaller cross section adjacent the connections of the coupling member portions with each other and with the intermediate piece respectively.
  • a pick-up element in which the transforming elements consist of piezoelectrical elements having at least their one ends clamped in a casing may be so constructed according to the invention that a sleeve is located about the free end of each piezoelectrical element, the associated second coupling member portion whose cross-sectional area increases in the direction towards the sleeve, is secured to said sleeve adjacent the longitudinal axis of symmetry of the piezoelectrical element, the arrangement being such that the movements of all of the coupling member portions and the intermediate piece can only take place in a plane normal to said longitudinal axis.
  • the two piezoelectrical elements may have their main faces located parallel to each other.
  • the main faces of the two piezoelectrical elements are co-planar.
  • FIGURE 1 is a side view of the pick-up element, one half of the casing accommodating the element being removed;
  • FIGURE 2 is a different elevation of the casing containing the pick-up element according to the invention.
  • FIGURE 3 is a cross-sectional view and an elevation resp. on line IHIII in FIGURE 2;
  • FIGURE 4 schematically shows the movements of the stylus and of the coupling members cooperating with the stylus
  • the pick-up element is enclosed in a casing comprising two halves 1 and 2 preferably made from moulded material.
  • Two piezoelectrical elements 3 and 4 are clamped in the casing 1, 2 with the interposition of a resilient band.
  • Said resilient band meant for interposition between the casing and the element 3 is designated by the numeral 5 (what is said about the construction and manner of seeming the element 3 naturally likewise applies to the construction and manner of securing the element 4).
  • the element 3 is supported by a second band of relatively soft material 6.
  • a metal partition wall 7 is located which wall also serves as a common current carrying member for the two elements 3 and 4 and which for said purpose is provided with a terminal 8.
  • a stylus holder 11 provided with a stylus 12 is secured to the casing 1, 2.
  • the stylus holder 11 substantially comprises a narrow and thin flexible strip, a portion of which is turned through 90".
  • the stylus holder 11 bears with a portion located very closely adjacent the stylus 12 against a coupling member 15.
  • the arms 21 and 23 broaden in the direction towards the sleeves 20 and 19, which has for its result that the connection at 37 and 38 between said arms and said sleeves is relatively stilt, so that movements of said arms in a plane normal to the longitudinal axes of the piezoelcctrical elements 3 and 4 result in a twisting of said elements about their longitudinal axes. It should be noted that the places 37 and 38 where the arms 21 and 23 are connected with the sleeves 19 and 20 are centered relative to said longitudinal axes.
  • FIGURE 4 diagrammatically shows in what manner the coupling member 15 behaves under the influence of movements according to the arrows designated by 29 and 30.
  • the inoperative position of the coupling member 15 is shown in a full line, the deflections of the coup-ling member as a result of the movements according to the arrows 29 and being shown in dashes and in dots and dashes respectively.
  • the entire coupling member 15 consists of one piece both the manufacture as well as the mounting of said member is extraordinarily simple. Due to this coupling member there is a relatively great freedom in the selection of the position of the main faces of the elements 3 and 4 relative to each other. Without such a construction said faces must necessarily be arranged at right angles to each other and the transforming elements would occupy a large space then, which would result in the pickup element becoming very broad. In the construction according to the invention said faces may be parallel to each other and the elements may be arranged in close proximity.
  • a binaural pick-up for a V-shaped record groove having two distinct groove modulations along the respective two sides thereof, support means, two transducer means each comprising an elongated flat strip of piezoelectric material, one end of said strips being held by said support means, the other end of the strips being wholly unsupported, stylus means connected to said support means for engaging said groove, said strips being mounted in side-by-side arrangement above said stylus means, and integrally molded resilient coupling means supported by the other ends of said strips for operative engagement with said stylus means, said coupling means being integrally molded of resilient material and including first and second pairs of elongated arm portions and two sleeve portions, said arms being arranged generally in the form of a rectangle, said sleeve portions each encircling a respective unsupported end of one of said transducer means, each of said first pair of arm portions being disposed in a direction normal to a respective plane of said groove modulations and being connected with each other at their one ends and in driven engagement with said styl
  • said pick-up includes a metal element positioned between said flat strips of piezoelectric material at their one ends in abutting relationship to each strip to provide a common electrical contact.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Gyroscopes (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
US757745A 1957-10-29 1958-08-28 Binaural pick-up cartridge Expired - Lifetime US3178520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL221984 1957-10-29

Publications (1)

Publication Number Publication Date
US3178520A true US3178520A (en) 1965-04-13

Family

ID=19751018

Family Applications (1)

Application Number Title Priority Date Filing Date
US757745A Expired - Lifetime US3178520A (en) 1957-10-29 1958-08-28 Binaural pick-up cartridge

Country Status (7)

Country Link
US (1) US3178520A (fr)
BE (1) BE565959A (fr)
CH (1) CH361408A (fr)
DE (1) DE1094006B (fr)
FR (1) FR1202990A (fr)
GB (1) GB836675A (fr)
NL (1) NL104447C (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215786A (en) * 1959-08-21 1965-11-02 Astatic Corp Universal monaural-binaural phonograph pickup cartridge
DE1202019B (de) * 1961-05-02 1965-09-30 Steidinger Geb Tonabnehmer zum Abtasten einer Schallrille fuer Zweikoordinatenschrift

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1520357A (en) * 1920-07-02 1924-12-23 Hugh C Lord Method of and apparatus for producting sound
US2093540A (en) * 1931-12-14 1937-09-21 Emi Ltd Sound-transmission, sound-recording, and sound-reproducing system
US2114471A (en) * 1936-06-20 1938-04-19 Bell Telephone Labor Inc Sound recording and reproducing system
US2328478A (en) * 1940-03-30 1943-08-31 Bell Telephone Labor Inc Piezoelectric transducer
US2328952A (en) * 1941-03-31 1943-09-07 Rca Corp Signal translating apparatus
GB686777A (en) * 1950-02-11 1953-01-28 Adrian Francis Sykes Improvements in electrical sound recording and reproducing apparatus
US2775460A (en) * 1951-05-15 1956-12-25 Ian M Shivack Binaural recording system
US2825763A (en) * 1952-05-26 1958-03-04 Vries Machiel De Apparatus for transmitting mechanical vibrations
US2858373A (en) * 1952-07-18 1958-10-28 Hans E Hollmann Highly sensitive transducers with electromechanical feedback
US2934610A (en) * 1958-06-09 1960-04-26 Sonotone Corp Sound-record transducing device for stereophonic and like recording systems
US3055989A (en) * 1957-08-12 1962-09-25 Columbia Broadcasting Syst Inc Ceramic reproducer

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1520357A (en) * 1920-07-02 1924-12-23 Hugh C Lord Method of and apparatus for producting sound
US2093540A (en) * 1931-12-14 1937-09-21 Emi Ltd Sound-transmission, sound-recording, and sound-reproducing system
US2114471A (en) * 1936-06-20 1938-04-19 Bell Telephone Labor Inc Sound recording and reproducing system
US2328478A (en) * 1940-03-30 1943-08-31 Bell Telephone Labor Inc Piezoelectric transducer
US2328952A (en) * 1941-03-31 1943-09-07 Rca Corp Signal translating apparatus
GB686777A (en) * 1950-02-11 1953-01-28 Adrian Francis Sykes Improvements in electrical sound recording and reproducing apparatus
US2775460A (en) * 1951-05-15 1956-12-25 Ian M Shivack Binaural recording system
US2825763A (en) * 1952-05-26 1958-03-04 Vries Machiel De Apparatus for transmitting mechanical vibrations
US2858373A (en) * 1952-07-18 1958-10-28 Hans E Hollmann Highly sensitive transducers with electromechanical feedback
US3055989A (en) * 1957-08-12 1962-09-25 Columbia Broadcasting Syst Inc Ceramic reproducer
US2934610A (en) * 1958-06-09 1960-04-26 Sonotone Corp Sound-record transducing device for stereophonic and like recording systems

Also Published As

Publication number Publication date
FR1202990A (fr) 1960-01-14
NL104447C (fr)
DE1094006B (de) 1960-12-01
BE565959A (fr)
CH361408A (de) 1962-04-15
GB836675A (en) 1960-06-09

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