USRE25649E - Transducing device - Google Patents

Transducing device Download PDF

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Publication number
USRE25649E
USRE25649E US25649DE USRE25649E US RE25649 E USRE25649 E US RE25649E US 25649D E US25649D E US 25649DE US RE25649 E USRE25649 E US RE25649E
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US
United States
Prior art keywords
groove
directions
transducing
coupling member
transducing elements
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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
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English (en)
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Publication date
Priority claimed from US798099A external-priority patent/US3026382A/en
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Publication of USRE25649E publication Critical patent/USRE25649E/en
Expired legal-status Critical Current

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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
    • 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 invention relates to a transducing device for re-.
  • the recordingor scanning-member is connected with two independently deformable transducing elements through a coupling member which comprises two parts, each of which is at least substantially sensitive to only one of the two directions of oscillation.
  • the term coupling member is herein defined as a connecting body between two transducing elements, this body having the property of being rigid for one direction of oscillation and resilient for the other direction and conversely.
  • the coupling member in one case, combines and the other case splits up two kinds of information.
  • the driving force for the recording or scanning device loads the parts of the coupling member only by tensile stress. This has the advantage that no stress due to axial compression occurs in the said parts.
  • the two signals referred to above may consist of a conventional, acoustical signal and a reverberation signal or instead of a reverberation signal, a signal in which various acoustical effects are provided, for example, echo effects, or else, the two signals may consist of stereophonically associated acoustical signals.
  • One signal may furthermore, contain high tones and the other signal low tones of an acoustical signal sequence, so that in this manner stereophonic reproduction of the original sound image may be obtained.
  • the two signals may, moreover, consist of stereoscopically associated television signals.
  • FIG. 1 is a front elevation of the transducing device according to the invention
  • FIG. 2 is a side view thereof
  • FIG. 3 shows a modification of the device shown in FIGS. 1 and 2 in a more compact construction.
  • reference numeral 1 designates I the elastic coupling member which establishes a mechanical connection between a recording or a scanning member 2 and the two transducing elements 3.
  • the needle 2 as a scanning member, is subjected to the modulations recorded in the groove of a record disc. If this groove has a composite record, the coupling member will split up the double information, in a manner such that one signal is converted by one transducing element into an electrical voltage and the other signal by the second transducing element. Conversely, when recording two signals of different directions of oscillation, the coupling piece will operate as a composer of the two signals.
  • the parts 4 of the coupling piece, in which the splitting-up or the combination of the information takes place, are subjected, in the device according to the invention, only to tensile stress by the force driving the needle 2. This is due to the fact that the longitudinal axes of the part 4 intersect one another so that an acute angle is formed on the side where the needle is fastened; i.e. between needle-holder 7 and adjacent portions 4 of the coupling pée.
  • FIG. 2 is a side view of the transducing device shown in FIG. 1.
  • the transducing element 3 subjected to torsional stress is clamped tight at 5 and is torsioned about the axis 6.
  • the mechanical torque is obtained from the needle holder 7, during the scanning of the groove-shaped recording track, through the coupling member 1, of which the part 4 provided the splitting-up of the information.
  • the needle-holder 7 is suspended at 8 and provided with a needle 2, which can be positioned on the record.
  • the parts 4 are not subjected to stress due to axial compression, they may be manufactured from a material having little rigidity, while a simple construction of the device may be obtained, in which, on the one hand, the coupling piece forms an integral part and, on the other hand, the tranmucing elements are arranged parallel or substantially parallel to each other, as is shown in FIG. 3.
  • the device may comprise transducing elements that may be subjected to bending stress, though the invention is not confined to the use of piezo-electric transducing elements.
  • a transducing device for converting information recorded in a groove in at least two different directions into a composite signal and for converting a composite signal into two portions recorded in two different directions in a groove comprising a member adapted to follow said groove and selectively record and scan variations therein in both of said directions, a pair of transducing elements each responsive to oscillations corresponding to cacao one of said directions, and a coupling member constituted of a relatively non-rigid material connecting said transducing elements, said coupling member having two portions forming an angle therebetween of less than 90 in which said groove-following member is positioned and connected to said coupling member whereby said coupling member is only under tensile stress and selectively transmits movements of said groove-following member to each of said transducing elements] [2.
  • a transducing device for converting information recorded in a groove in at least two different directions into a composite signal and for converting a composite signal into two portions recorded in two different directions in a groove comprising a member adapted to follow said groove and selectively record and scan variations therein in both of said directions, a pair of transducing elements each responsive to oscillations corresponding to one of said directions, and an elastic coupling member constituted of a relatively non-rigid material connecting said transducing elements, said coupling member having two portions forming an angle therebetween of less than 90 in which said groove-following member is positioned and connected to said coupling member whereby said coupling member is only under tensile stress and selectively transmits movements of said groove-following member to each of said transducing elements] [3.
  • a transducing device for converting information recorded in a groove in at least two different directions into a composite signal and for converting a composite signal into two portions recorded in two different directions in a groove comprising a member adapted to follow said groove and record and scan variations therein in both of said directions, a pair of transducing elements positioned substantially parallel to one another, each of said transducing elements being responsive to oscillations corresponding to one of said directions, and an elastic coupling member constituted of a relatively non-rigid material connecting said transducing elements, said coupling member having two portions forming an angle therebetween of less than 90 in which said groovefollowing member is positioned and connected to said coupling member whereby said coupling member is only under tensile stress and selectively transmits movements of said groove-following member to each of said transducing elements] [4.
  • a transducing device for converting information recorded in a groove in at least two diiferent directions into a composite signal and for converting a composite signal into two portions recorded in two different directions in a groove comprising a member adapted to follow said groove and selectively record and scan variations therein in both of said directions, a pair of transducing elements each responsive to oscillations corresponding to one of said directions, and an elastic coupling member consisting essentially of polyvinylchloride connecting said transducing elements, said coupling member having two portions forming an angle therebetween of less than 90 in which said groove-following member is positioned and connected to said coupling member whereby said coupling member is only under tensile stress and selectively transmits movements of said groove-following member to each of said transducing elements] [5.
  • a transducing device for converting information recorded in a groove in at least two difierent directions into a composite signal and for converting a composite signal into two portions recorded in two difierent directions in a groove comprising a member adapted to follow said groove and selectively record and scan variations therein in both of said directions, a pair of transducing elements positioned substantially parallel to one another, each of said transducing elementsbeing responsive to oscillations corresponding to one of said directions, and an elastic coupling member consisting essentially of polyvinylchloride connecting said transducing elements, said coupling member having two portions forming an angle (.4, tberebetween of less than 90 in which said groovefollowing member is positioned and connected to said coupling member whereby said coupling member is only under tensile stress and selectively transmits movements of said groove-following member to each of said transducing elements] 6.
  • a transducing device for converting information recorded in a groove in at least two difierent directions into a composite signal and for converting a composite signal into two portions recorded in two different directions in a groove comprising a member adapted to follow said groove and selectively record and scan variations therein in both of said directions, a pair of transducing elements each responsive to oscillations corresponding to one'of said directions, and an inverted V-shaped member constituted of a'relativcly non-rigid material connecting said transducing elements, said groove-following member being positioned between the branches of said V-shaped member and being connected to the apex thereof whereby the branches of the V-shuped member are subjected only to tensile stress by a force on the groove-following membar.
  • a transducing device for converting information recorded in a groove in at least two different directions into a composite signal and for converting a composite signal into two portions recorded in two different directions in a groove comprising a member adapted to follow said groove and selectively record and scan variations therein in both of said directions, a pair of transducing elements each responsive to oscillations corresponding to'one of said directions, and an inverted V-shapcd elastic member constituted of a relatively non-rigid material connecting said transducing elements, said groove-following member being positioned between the branches of said V-shaped member and being connected to the apex thereof whereby the branches of the V-shaped member are subjected only to tensile stress by a force on the groove-following member.
  • a transducing device for converting information rccordcd in a groove in at least two difiercnt directions into a composite signal and for converting a composite signal into two portions recorded in two different directions in a groove comprising a member adapted to follow said groove and selectively record and scan variations therein in both of said directions, a pair of transducing elements positioned substantially parallel to one another, each of said transducing elements being responsive to oscillations corresponding to one of said directions, bnd an inverted V-shaped elastic member constituted of a relatively nonrigid material connecting said transducing elements, said groove-following member being positioned between the branches of said V-shaped member and being connected to the apex thereof whereby the branches of the V-shaped member are subjected only to tensile stress by a force on the groove-following member.
  • a transducing device for converting information rcdorded in a groove in at least two diflerent directions into a composite signal and for converting a composite signal into two portions recorded in two difierent directions in a groove comprising a member adapted to follow said groove and selectively record and scan variations therein in both of said directions, a pair of transducing elements each responsive to oscillations corresponding to one of said directions, and an inverted V-shaped elastic member consisting essentially of polyvinylchloride connecting said transducing elements, said groove-following member being positioned between the branches of said V-shaped member and being connected to the apex thereof whereby I the branches of the V-shaped member are subjected only to tensile stress by a force on the groove-following member.
  • a transducing device for converting information recorded in a groove in at least two different directions into a composite signal and for converting a composite signal into two portions recorded in two different directions in a groove comprising a member adapted to follow said groove and selectively record and scan variations therein in both of said directions, a pair of transducing elements positioned substantially parallel to one another, each of said transducing elements being responsive to oscillations corresponding to one of said directions, and an inverted V-shaped elastic member consisting essen tially of polyvinylchloride connecting said transducing elements, said groove-following member being positioned between the branches of said V-shaped member and being connected to the apex thereof whereby the branches of the V-shaped member are subjected only to tensile stress by a force on the groove-following member.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
US25649D 1958-03-08 Transducing device Expired USRE25649E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL225662 1958-03-08
US798099A US3026382A (en) 1958-03-08 1959-03-09 Transducing device

Publications (1)

Publication Number Publication Date
USRE25649E true USRE25649E (en) 1964-09-29

Family

ID=26641638

Family Applications (1)

Application Number Title Priority Date Filing Date
US25649D Expired USRE25649E (en) 1958-03-08 Transducing device

Country Status (5)

Country Link
US (1) USRE25649E (fr)
CH (1) CH366678A (fr)
FR (1) FR1228186A (fr)
GB (1) GB909963A (fr)
NL (2) NL225662A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294925A (en) * 1965-05-13 1966-12-27 Gen Electric Coupler for a stereo phonograph cartridge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294925A (en) * 1965-05-13 1966-12-27 Gen Electric Coupler for a stereo phonograph cartridge

Also Published As

Publication number Publication date
GB909963A (en) 1962-11-07
FR1228186A (fr) 1960-08-26
CH366678A (de) 1963-01-15
NL225662A (fr)
NL111328C (fr)

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