US3136555A - Stereophonic pick-up - Google Patents

Stereophonic pick-up Download PDF

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Publication number
US3136555A
US3136555A US38775A US3877560A US3136555A US 3136555 A US3136555 A US 3136555A US 38775 A US38775 A US 38775A US 3877560 A US3877560 A US 3877560A US 3136555 A US3136555 A US 3136555A
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United States
Prior art keywords
support
stylus
casing
arms
shank
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 - Lifetime
Application number
US38775A
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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
Application filed by Ronette Piezo Electrische Industrie NV filed Critical Ronette Piezo Electrische Industrie NV
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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

  • the present invention relates to a stereophonic pick-up comprising a casing in which two transducers are secured, either transducer being connected with a common stylus holder by a coupling means, said stylus holder having a stylus fitted to its one end and having its other end accommodated within the smaller of the two angles formed by the interconnected ends of said coupling means.
  • the coupling means should have a relatively thin elongated shape. If the coupling means have this shape they will have an adequate yieldingness in transverse direction, it is true, but the consequence thereof at the same time is that in longitudinal direction said coupling means can take up but a very slight force without collapsing. This means that the coupling means are no longer in a position then to take up the reaction force of the stylus pressure, so that in this respect special provisions are to be taken.
  • the object of the invention is to so construct the stylus holder that when the pick-up is placed ona record a mechanical stress will manifest itself in the coupling means which levels out the said reaction force. If desired, the construction may be so that already after the assembly of the pick-up there is a certain pre-stress in the coupling means which when the pick-up is placed on a record increases to a value capable of withstanding the reaction force.
  • a further object according to the invention is that during the mounting of the stylus holder in the casing, said stylus holder will lie in the correct position in respect of the coupling means without it being necessary to pay any special attention thereto.
  • the pick-up of the type referred to is so constructed that during its mounting the stylus holder which is secured in a support, only admits of being brought in its place along a fixed track, which track as regards its shape and location relative to the casing is defined by guide means with which such support and said casing respectively are provided, said track being so shaped and located that at least when the support covers the last portion of said track the produced part of said other end of the stylus holder is located within the angle enclosed by the coupling means, the arrangement being such that said other end of the stylus holder is positively brought in itsseat on the ends of the coupling means.
  • the pick-up according to the invention may have for its feature that the support has a predetermined seat relative to the casing, which seat can only be reached by moving the support along a fixed track in the direction towards the coupling means, said track as 3,136,555 Patented June 9, 1964 tion adapted to cooperate with said resilient member regards its shape and location being defined by coopwhile during said cooperation the stylus holderwhich is tiltably supported by the support is so moved relative to said support by said resilient member that said stylus holder. moves through a positive resultant path.
  • FIGURE 1 is a partial bottom view of a first embodiment of the pick-up provided with one stylus holder
  • FIGURE 2 is likewise a partial showing of the pickup according to FIGURE 1, said showing being partly an elevation and partly a sectional view;
  • FIGURE 3 is a cross-sectional view on the line III-III in FIGURE 2;
  • FIGURE 4 shows the detachable support of the stylus holder in perspective
  • FIGURE 5 shows a slot'provided in the pick-up according to FIGURES 1 and 2, in which slot .the support according to FIGURE 4 fits;
  • FIGURE 6 is a sectional View of the type as shown in FIGURE 3, but of a second embodiment which is provided with two stylus holders located diametrically opposite each other;
  • FIGURE 7- is a longitudinal sectional view of a support different from the support shown in the preceding figures;
  • FIGURES is a cross-sectional view on the line VIII- VIII in FIGURE 7;
  • FIGURE 9 is a plan view of a support removed from the casing.
  • two crystal elements 2 and 3 are located the one ends of which are clamped inthe casing 1 in a manner not shown.
  • a sleeve 5 and 6 respectively is fitted, for which purposesaid sleeves, are each providedwith , a longitudinal slot 7 and 8 respectively.
  • the arms 11 and 12 are in the form of thin elongated strips and they are integral with each other as well'as with the associated sleeves 5 and 6 respectively.
  • the assembly of the sleeves 5 and 6 and the arms 11 and 12 is made from a relatively soft synthetic material.
  • the crystal elements 2 and 3 have their main faces arranged at right angles to eachother, as appears fromFIGURE 3. Also the armsdl and 12 are at least substantially at right angles to each other.
  • a stylus holder 14 is located which has its end provided with a stylus 15.
  • the stylus holder 14 is secured in a block 16, made from a resilient kind of synthetic material and for thispurpose the block contains an opening 17.
  • Said block 16 issec uredto-a substantially gutter-shaped support 18 which has been separately shown in FIGURE 4.
  • Said support 18 has a substantially trapezium-shaped crosssection and may be slid into and out of a slot in the casing 1, which slot is separately shown in FIGURE 5 and which is generally-designated by the reference numeral 19.
  • the uppermost portion of the slot 19 is formed complementary in respect of the support 18.
  • the slot 19, however, is slightly deeper than the height of the support 18, because in addition to two oblique walls 20 and 21 the slot also has two straight walls 22 and 23.
  • FIGURE 3 the support 18 is shown in its place and it will be seen that a free space 24 is left above the support,
  • a leaf spring 26 is secured which in the inoperative position is bent to extend away from said bottom. From the walls 20 and 21 two projections 27 and 28 project, while in the support 18 complementary shaped recesses 29 and 30 are provided. If the support 18 is to be slid into, the slot 19, for which purpose according to FIGURES l and 2 the support is to be moved from the left to the right, the lower faces 31 and 32 of the support 18 are to be moved over the projections 27 and 28. The spring 26 is then slightly pressed towards the bottom 25. This means that the stylus holder 14 is moved upwardly together with the support 18, the
  • FIGURE 6 shows a second embodiment comprising a second stylus 34, the point of which has another radius diameter than the point of the stylus 15, which is of importance for enabling the pick-up to track grooves of different width.
  • the sleeves Sand 6 are laterally provided with extensions 35 and 36 to which arms 37 and 38 are secured, which at 39 merge in to each other.
  • a stylus holder 40 Within the substantially right angle at 39 between the arms 37 and 38 a stylus holder 40 is locatedwhich carries the stylus 34.
  • the other structural details are identical to the corresponding details described hereinbefore and need not be mentioned separately therefore.
  • FIGURES 7, 8 and 9 a support of a different construction is shown.
  • Said support 41 has a trapeziumshaped cross-section as may be seen from FIGURE 8 and is located in a recess 42 of the casing 43.
  • the support 41 fits the recess 42 without play, so that the support 41 can only be moved according to a straight path in respect of the casing 43 when it is inserted or removed from the casing.
  • the support again supports a stylus holder 44 with a stylus 45, the stylus holder passing through a strip of elastic material 46 acting as a bearing, which strip of elastic material is secured in the support 41.
  • Two slit-shaped passages 47 and 48 are provided in the support 41.
  • a substantially U-shaped leafspring 49 passes through said passages.
  • the one end of the spring "49 extending through the passage 48 ends in two strips 50 and 51 which extend downwardly on either side of the stylus holder 44 and which engage the resilient strip 46 by means of their hook-shaped ends 52 and 53 respectively.
  • the leaf spring 49 has one end anchored in the support 41.
  • the central portion of the spring 49 is slightly bent upwards at 54, while its end 55 extends through the slit 47. Said end 55 is recessed at 56 and is located very closely to the stylus holder 44.
  • the bent portion 54 of the spring 49 is adapted to cooperate with a projection 57 which forms part of the easing 43 and is secured to the upperwall of the recess 42.
  • the coupling means already have a certain pre-stress after the mounting of the stylus .holder,.which pro-stress is in point of fact generatedby a certain deformation of the elastic block in which the stylus holder is supported.
  • the stylus holder is free from the coupling means as long as the pick-up does not bear on a record. In this case therefore a stress in the coupling means will only come to being when the pick-up is in its operative position.
  • a binaural cartridge means for use with V-groove sound records having separate undulations on the opposed faces of the groove casing means, support means, a pair of transducer means each having a mounting portion and a driven portion, means to attach the mounting portions of the transducer means to said casing means to position the driven portions in spaced side-by-side relationship, coupling means including a pair of downwardly convergent arms arranged generally normal to the planes of the respective faces of a V-groove and flexurally joined at their lower ends, means to mount the coupling means to operatively engage the upper portions of the arms with the driven portions of the respective transducer means, stylus means including an elongated shank having a stylus-tip at one end, means to pivotally mount said shank on said support means, said support means being removably attached to said casing means, said support means being engaged with the'shank medially of the ends thereof to position the other end of the shank in operative engagement with said juncture of coupling
  • said support means includes a resilient element and said stylus shank is pivotally connected to the support means by said resilient element, said shank being normally mounted in an inclined position with the stylus tip at the lower end and the other end of the shank being positioned for engagement with the coupling means when the support means is moved rearwardly.
  • said slideway includes a longitudinally extending recess provided in said casing means, said recess having opposed inclined walls, said support means being provided with inclined side walls for dovetailed sliding engagement with walls of the recess, the height of the support means being less than that of the recess, and biasing means positioned in said recess for engagement with the top of the support means to urge the side walls of the support means into engagement with the side walls of the recess.
  • one of said side walls is provided with projecting detent means, the respective complementary side wall being provided with a recess to receive said detent means, said detent being positioned to limit rearward movement of the support means, said support means being upwardly tiltable against said biasing means to clear said detent and permit further rearward movement of the support means, and downwardly tiitable after said further rearward movement into operative position when the detent is in alignment with its cooperating recess.
  • pivotal mounting includes a resilient elementto connect said shank with the support means whereby said other end of the stylus shank will exert an initial downward force against the coupling when downwardly tilted into engagement therewith.
  • a binaural sound reproducing cartridge means for use selectively with sound records having grooves of differing physical characteristics, said grooves being of the character wherein two distinct undulatory surfaces are impressed therein, including, support means, a pair of transducer means having a mounting portion and a driven portion, means to attach said mounting portions to the support means, first and second stylus means, each said stylus means being physically compatible with a particular character of record groove, means to attach said stylus means to the support means for selective engagement with a record groove, and coupling means to transmit vibrations from either one of said stylus means to both said transducer means, said coupling means including first and second vibration transmitting mechanisms, each said mechanism including a driven portion and two driving portions and including energy-discriminating elements whereby vibrations from the respective undulatory surfaces of a groove are transmitted separately to the respective driving portions of the mechanism, the force transmitting characteristics of one said mechanism diifering from the force transmitting characteristics of the other mechanism, and means to mount said coupling means to position the driven portions of the vibration transmitting mechanisms
  • transducer means comprises two elongated flat strips of piezoelectric material, said strips being mounted in spaced parallel relationship
  • said coupling means is integrally formed of elastomeric material
  • said means to connect the coupling means to the transducers comprises a. pair of sleeve means formed integrally with the coupling means of elastomeric material to embrace the respective one ends of the piezoelectric strips.
  • said piezoelectricstrips are disposed in angularly related planes
  • said coupling means including two pairs of L-shaped levers, one leg of each of the L-shaped levers in one pair of said levers being formed by a pair of integrally formed projections each extending respectively from a respective sleeve means in the plane of a respective piezoelectric strip, the corresponding leg of each of the L-shaped levers in the second pair of levers being formed by a pair of integrally formed projections each extending respectively from a respective sleeve means in a plane normal to the plane of a respective piezoelectric strip.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Measuring And Other Instruments (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
US38775A 1959-07-02 1960-06-27 Stereophonic pick-up Expired - Lifetime US3136555A (en)

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Application Number Priority Date Filing Date Title
NL240836 1959-07-02

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US3136555A true US3136555A (en) 1964-06-09

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US38775A Expired - Lifetime US3136555A (en) 1959-07-02 1960-06-27 Stereophonic pick-up

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US (1) US3136555A (US07534539-20090519-C00280.png)
GB (1) GB941254A (US07534539-20090519-C00280.png)
NL (2) NL240836A (US07534539-20090519-C00280.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462548A (en) * 1965-05-13 1969-08-19 Robert M Rinder Combined writing device and computer input
US3525528A (en) * 1962-01-10 1970-08-25 Ronette Piezo Electrische Ind Stereophonic pick-up
US3966216A (en) * 1975-05-07 1976-06-29 Investigaciones Tecnologicas Electromecanicas Y Electronicas, S.A. Cartridge assembly for record player tone arm
US3988025A (en) * 1975-02-13 1976-10-26 Fumitaka Nagamura Record disc cutting apparatus
US4459692A (en) * 1982-01-20 1984-07-10 Rca Corporation Signal pickup cartridge

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043864B1 (de) * 1980-07-11 1984-06-06 Dual Gebrüder Steidinger Tonabnehmernadel mit auswechselbarer Halterung
FR2498869A1 (fr) * 1981-01-23 1982-07-30 Zafira France Cellule de lecture, a aiguille montee sur coiffe remplacable

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934610A (en) * 1958-06-09 1960-04-26 Sonotone Corp Sound-record transducing device for stereophonic and like recording systems

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934610A (en) * 1958-06-09 1960-04-26 Sonotone Corp Sound-record transducing device for stereophonic and like recording systems

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525528A (en) * 1962-01-10 1970-08-25 Ronette Piezo Electrische Ind Stereophonic pick-up
US3462548A (en) * 1965-05-13 1969-08-19 Robert M Rinder Combined writing device and computer input
US3988025A (en) * 1975-02-13 1976-10-26 Fumitaka Nagamura Record disc cutting apparatus
US3966216A (en) * 1975-05-07 1976-06-29 Investigaciones Tecnologicas Electromecanicas Y Electronicas, S.A. Cartridge assembly for record player tone arm
US4459692A (en) * 1982-01-20 1984-07-10 Rca Corporation Signal pickup cartridge

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Publication number Publication date
GB941254A (en) 1963-11-06
NL111712C (US07534539-20090519-C00280.png)
NL240836A (US07534539-20090519-C00280.png)

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