US3624584A - Variable resistance device for an electronic musical instrument - Google Patents

Variable resistance device for an electronic musical instrument Download PDF

Info

Publication number
US3624584A
US3624584A US11283A US3624584DA US3624584A US 3624584 A US3624584 A US 3624584A US 11283 A US11283 A US 11283A US 3624584D A US3624584D A US 3624584DA US 3624584 A US3624584 A US 3624584A
Authority
US
United States
Prior art keywords
base
contact member
elongated element
slits
manner
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
US11283A
Other languages
English (en)
Inventor
Junji Ohno
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki Co 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Application granted granted Critical
Publication of US3624584A publication Critical patent/US3624584A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/053—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only
    • G10H1/055—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements
    • G10H1/0558—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements using variable resistors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00—Music
    • Y10S84/07—Electric key switch structure

Definitions

  • a variable resistance device adapted for use in a portamento performance combined with an electronic musical instrument comprises a narrow base made of electrical insulating material, an elongated resistance element disposed on said base and used as an element for determining the oscillating frequency of a tone signal generator and a flexible sheetlike conductor arranged above said resistance element at a prescribed space from each other.
  • the present invention relates to a variable resistance device adapted for use in a portamento performance in combination with an electronic musical instrument, for example, an electronic organ.
  • the portamento effect results from successive variations in the frequency of sound waves. Therefore, the portamento effect in the truest sense of the word can be realized, in the case of an electronic musical instrument, by forming a tone source circuit from a variable frequency oscillator and using a variable resistance device as an element for determining the frequency of said oscillator and successively varying the resistance of said device so as to obtain a continuously changing Oscillating frequency.
  • a variable resistance device for generating such a portamento effect is required to be of such type as allows the player to vary the magnitude of resistance easily by a single hand, particularly in succession from any proper position of the resistance element, that is, from any proper level of resistance at which the desired portamento effect starting with a desired note can be produced.
  • variable resistance device is a type in which the magnitude of resistance is varied by moving a knob with a slider which can slide on the resistance element in close contact therewith.
  • variable resistance device is employed as a variable resistor for a variable frequency oscillator, it is impossible immediately to vary the magnitude of resistance in succession starting from a proper level for the desired portamento efl'ect, because the slider always contacts the resistance element. In such case, therefore, the sliding knob has to be brought back to a proper position for said portamento effect, each time it is needed.
  • the slider of said knob always contacts the resistance element as described above, the control of the oscillator requires an extra switching means other than said knob.
  • use of such type of variable resistance device presents difficulties in allowing the player to make a portamento performance simply by one of his hands.
  • FIGS. 1A and 18 There is presented in FIGS. 1A and 18 a prior art device which claims improvement in the aforementioned drawbacks.
  • FIG. 1A At the substantially central part of a narrow base 1 is formed an elongated resistance element 3 extending in the longitudinal direction of said base 1 with an electrical insulating material 2 interposed therebetween.
  • an elongated resistance element 3 extending in the longitudinal direction of said base 1 with an electrical insulating material 2 interposed therebetween.
  • To both sides of said base 1 are fixed narrow foamed resilient materials 4a and 4b. Further across said foamed resilient materials 4a and 4b is stretched a flexible contact member 5.
  • the foamed resilient materials 4a and 4b and element 3 are designed to have such a height that while there is not applied any external force on said flexible contact member 5, the element 3 and contact member are not brought into mutual contact. Namely, the element 3 is so formed as to have a smaller height than the foamed resilient materials 40 and 4b.
  • Reference characters 6a and 6b denote coil springs. These coils 6a and 6b are forcefully expanded to allow a gap 9 between the respective turns. And in each of said gaps 9 is disposed a horizontal rod 7 consisting of a conductor. Above the horizontal rods 7 and inside of the coil springs 60 and 6b respectively are introduced vertical rods 8a and 8b made of flexible material. When, thereafter, the force applied to the coil springs 6a and 6b is removed, said horizontal rods 7 and vertical rods 8a and 8b are coupled together by the compressive force of said coil springs 80 and 8b to fonn a flexible contact assembly 5. ln this case, said horizontal rods 7 are covered with a sheet of flexible insulation film 10.
  • the flexible sheetlike contact member of a variable resistance device has a conductor portion integrally formed therewith which is to be brought into contact with a resistance element, thus allowing the entire device to be easily assembled and manufactured at low cost.
  • the flexible sheetlike contact member does not normally contact the resistance element, preventing an oscillator from being operated. Accordingly, the player need not be concerned with the control of the oscillator by using an extra switching means.
  • FIG. IA is a sectional view of a prior art variable resistance device for generation of a portamento effect
  • FIG. 2A is an exploded perspective view of a variable resistance device according to a first embodiment of the invention.
  • FIG. 3A is a perspective view of a variable resistance device according to a second embodiment of the invention.
  • FIG. 3B is a perspective view of the flexible contact member used in the device of FIG. 3A;
  • FIG. 4 is a perspective view of a variable resistance device according to a third embodiment of the invention.
  • FIG. 6B is a sectional view of the device of FIG. 6A in an operating condition
  • FIG. 7 is a schematic circuit diagram of an electronic musi cal instrument involving a variable resistance device.
  • a base 21 involved in said variable resistance device is prepared from electrical insulating material such as wood or plastics and formed into an elongated rectangular strip.
  • the base 21 has inclined planes 22 and 23 formed on its upper surface in a manner to extend in its longitudinal direction which descend from both lateral edges of the base 21 to its central part to define a depression24. Further at the central part of said depression 24 is cut out a groove 25 extending in the longitudinal direction of the base 21.
  • the base 21 also has two other inclined planes 26 and 27 formed on both lateral edges in a manner to extend in its longitudinal direction.
  • This slitted plate 29 has a large number of slits 30 formed by photoetching or punching in a direction perpendicular to the length of the element 28 in a manner to have a greater length than the width of the base 21.
  • the base 21, element 28 and slitted plate 29 form an operating section for a portamento performance in combination with an electronic musical instrument, said assembly constitutes a kind of potentiometer serving as a fingerboard to be manipulated in playing music.
  • the resistance prevailing between the conductors 39 and 40 connected to one end of the resistance element 28 and slitted plate 29 respectively assumesa value corresponding to the position of the intervening portions 31 between the slits 30 of the slitted plate 29 which are brought into contact with the resistance element 28. Therefore, it will be apparent that when that part of the upper surface of the slitted plate 29 which is depressed by the finger is shifted in turn in the longitudinal direction of the element 28, the magnitude of resistance prevailing between said conductors 39 and 40 will successively vary.
  • variable resistance device of the present invention When used as an element for determining the frequency of a variable frequency oscillator, the variable resistance device of the present invention having the aforementioned arrangement enables said oscillator frequency to be easily varied in proper sequence and in consequence a portamento effect to be easily realized. Further, said device does not allow the slitted plate 29 to contact the resistance element 28 unless the former is depressed, so that under such condition, there prevails infinite resistance between the conductors 39 and 40, bringing the oscillator to an inoperable state.
  • a portamento performing mechanism involving such a variable resistance device is generally operated by a finger, and accordingly the upper surface of the slitted plate 29 is shielded with a protective cover 41 which is pliant and little subject to expansion and contraction such as a piled cloth, then said portamento performance can be made smoothly.
  • the indicated oscillator is a Wien bridge oscillator. It comprises an amplifier involving transistors Tr, and Tr the circuits 111, 112, 113 and 114 of a frequency determining element connected parallel between the collector and emitter of said transistor Tr each of which consists of a series circuit involving a resistor and capacitor connected in series with a parallel circuit involving another resistor and capacitor and differs in phase shifting characteristics, emitter follower type impedance transducers 121, 122, 123 and 124, each of which is supplied with signals from the contact of the aforesaid series and parallel circuits involving resistors and capacitors, a resistance element 131 provided with a tap connected to the emitter of a transistor involved in each of said impedance transducers 121, 122, 123 and 124 and a conductor 132 constituted by the flexible contact member of said variable resistance device which is to
  • the aforesaid circuits 111, 112, 113 and 114 of a frequency determining element have frequencies which successively differ from each other as for example by one octave. Accordingly, frequency variation by 3 octaves is available in the embodiment shown in FIG. 7. Since there is not formed a feedback circuit unless the resistance element 131 and conductor 132 contact each other, it will be apparent that the aforementioned oscillator is not normally brought to an operable state.
  • the oscillator oscillates at a frequency having a magnitude intermediate between those of the specific frequencies of the two circuits Ill and 112 of said frequency determining element which are located nearest to said contact point between the conductor 132 and element 131. Shifting of the contact point results in the sequential change of the oscillator frequency. Outputs from the oscillator are drawn out of the emitter of the transistor Tr g involved in the amplifier 100 and supplied to a loudspeaker 143, if required, through a tone coloring circuit I41 and another amplifier 142. If the conductor plate 132 is intermittently depressed by the finger for contact with the resistance element 131, then there will be realized not only a portamento performance, but also other music scale performances.
  • said device acts as a voltage divider to supply the gate electrode of said filed effect transistor with successively varying DC voltage with the resultant change in the impedance of said field effect transistor, causing the frequency of said astable multivibrator to be continuously altered. Also in this case, the oscillator remains inoperable, so long as the conductor does not contact the resistance element.
  • Said flexible contact member 55 generally consists to a copper layer plated with a film of precious metal such as gold or silver and superposed on a substrate made of, for example, a mylar film.
  • a protective cover 58 made of, for example, a piled cloth which is fixed to both lateral sides of the base 51.
  • the resilient members 53 and 54 are mounted on the shoulder portions of the base 51 which are cut out to receive the members 53 and 54, but the present invention can of course be practised even when the resistance element 52 is fitted to the same plane of the base 51 as that to which the resilient members 53 and 54 are attached. However, if the resilient members 53 and 54 are fitted to the lower plane of the base 51 than that to which the resistance element 52 is attached, then there will be obtained a suitable spring constant. Accordingly, when the flexible contact member 55 is depressed by the finger, the resilient force of the resilient members 53 and 54 can be varied more suitably for a portamento performance than in the case where the element 52 and resilient members 53 and 54 are fitted on the same plane of the base 51 as described above. Further, the flexible contact member 55 may consist of not only said laminated plate, but also a thin metal plate slitted by punching or etching or a plastics film plated with a conductor layer.
  • a conductor film 66 preferably 10 to 20 microns thick by bonding or vapor depositing a metal foil.
  • the depth of the depression 62 of the base 61 and the thickness of the resistance element 64 are so chosen as to allow a clearance of about I to 2 mm. between the conductor film 66 and element 64.
  • said slits 75 are formed in the transverse direction of said thin conductor plate 74 in a manner to occupy the major part of its width. Both ends of the slits are slightly inclined in a horizontal plane with respect to the transverse direction of said conductor plate 74 at the same angle. Accordingly, the intervening portions 76 between the slits 75 are shaped like said slits 75. Said intervening portions 76 between the slits 75 are bent near both ends thereof toward the same plane as that defined by the upper surface of the thin conductor plate 74. When, therefore, said intervening portions 76 are depressed by the finger, the bent parts cause the resultant moment to be applied downward and in consequence the intervening portions 76 to be depressed to contact the resistance element 73.
  • the finger depressing the conductor plate 74 is gradually shifted as in the case of the variable resistance device in the preceding embodiments, then the magnitude of resistance prevailing between one end of the resistance element 73 and a conductor wire (not shown) connected to said conductor plate 74 will vary in succession.
  • the width of said slits and intervening portions therebetween is preferably about 0.3 to 1 mm., although in FIG. A the width is shown in an enlarged scale.
  • the upper surface of the thin conductor plate '74 acting as a flexible contact member is shielded with a protective cover 77, for example, a piled cloth as is practised in the variable resistance device of the foregoing embodiments.
  • the thin conductor plate as there are cut out a plurality of slits 87 defining a plurality of intervening portions 38 therebetween.
  • the width of said slits 87 and intervening portions 88 is preferably 0.3 to 1 mm., although in FIG. 6A the width is shown in a enlarged scale.
  • Both ends of each of said intervening portions 83 are bent by a press or the like into depressions 89 and 94) having a semicircular cross section whose bottoms project to the same side.
  • the semicircular bent ends 89 and 90 of said intervening portions 88 are disposed in the second depressions 83 and 84 respectively which are positioned adjacent to both sides of said first depression 82.
  • the upper surface of the thin conductor plate 86 is shielded with a protective cover 91 as in the variable resistance device of the foregoing embodiments, said cover being fixed to both sidewalls of the base 82.
  • variable resistance device With the variable resistance device according to the embodiment of FIG. 6A, when the intervening portions 88 between the slits 87 are urged downward by the finger, said portions 88 are fully bent, as illustrated by the phantom line 92 of FIG. 68, to contact the resistance element 85 in such a manner that said terminal semicircular depressed parts 89 and 90 are allowed to open slightly outward as shown in FIG. 6B. In this case, those of the intervening portions 88'which are not depressed are not subjected to any external force, so that they are prevented from contacting the resistance element 35.
  • the resistance is successive varied in the same manner as in the preceding embodiments.
  • variable resistance device for use in a portamento performance comprising a narrow base made of electrical insulating material
  • a flexible sheetlike contact member disposed above said elongated element and having at least that part thereof facing said elongated element made of electrically conductive material
  • said contact member is an electrically conductive metal plate having a plurality of slits so formed as to have a greater length than the width of said base and extend in the transverse direction thereof and to the lateral edges of the base.
  • a variable resistance device for use in a portamento performance comprising a narrow base made of electrical insulating material,
  • a variable resistance device for use in a portamento performance comprising a narrow base made of electrical insulating material,
  • an elongated element of electrical resistance material disposed at the substantially central part of said base in a manner to extend in the longitudinal direction of said base so as to be used as an element for determining the frequency of signals sent forth by a tone signal generator
  • a flexible sheetlike contact member disposed above said elongated element and having at least that part thereof facing said elongated element made of electrically conductive material
  • said base has a depression formed on its upper surface in a manner to extend in its longitudinal direction in which said element is to be disposed, and
  • said contact member has a large number of slits, at least one 1 end of each of which is inclined in a horizontal plane with respect to the transverse direction of said base and the remainder part thereof is disposed parallel to the transverse direction of said base.
  • a variable resistance device for use in a portamento performance comprising a narrow base made of electrical insulating material, an elongated element of electrical resistance material, disposed at the substantially central part of said base in a manner to extend in the longitudinal direction of said base so as to be used as an element for detennining the frequency of signals sent forth by a tone signal generator, a flexible sheetlike contact member disposed above said elongated element and having at least that part thereof facing said elongated element made of electrically conductive material, means which, while there is not applied any external force to said contact member, cause said contact member to be supported on both lateral edges of said base with a prescribed clearance allowed between said contact member and said elongated element, said base has a first depression formed at its central part in a manner to extend in its longitudinal direction in which said element is to be disposed and a pair of second depressions formed adjacent to both lateral sides of said first depression in a manner similarily to extend in the longitudinal direction thereof, said contact member consists of a conductor plate having a

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
US11283A 1969-02-20 1970-02-13 Variable resistance device for an electronic musical instrument Expired - Lifetime US3624584A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP1439169 1969-02-20
JP1439269 1969-02-20
JP1439069 1969-02-20
JP3414969 1969-04-15
JP3493269 1969-04-17

Publications (1)

Publication Number Publication Date
US3624584A true US3624584A (en) 1971-11-30

Family

ID=27519603

Family Applications (1)

Application Number Title Priority Date Filing Date
US11283A Expired - Lifetime US3624584A (en) 1969-02-20 1970-02-13 Variable resistance device for an electronic musical instrument

Country Status (3)

Country Link
US (1) US3624584A (de)
DE (1) DE2007673B2 (de)
NL (1) NL152685B (de)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699492A (en) * 1970-11-16 1972-10-17 Nippon Musical Instruments Mfg Variable resistance device for a portamento performance on an electronic musical instrument
US3764953A (en) * 1972-09-18 1973-10-09 Gen Motors Corp Rheostats
US3776087A (en) * 1969-05-14 1973-12-04 Nippon Musical Instruments Mfg Electronic musical instrument with variable impedance playboard providing portamento
JPS5050027U (de) * 1973-09-05 1975-05-16
US3895288A (en) * 1973-09-04 1975-07-15 Stephen H Lampen Touch controlled voltage-divider device
US3897708A (en) * 1973-05-24 1975-08-05 Yoshiro Suzuki Electrically operated musical instrument
US3965789A (en) * 1974-02-01 1976-06-29 Arp Instruments, Inc. Electronic musical instrument effects control
US3997863A (en) * 1975-04-03 1976-12-14 Norlin Music, Inc. Helically wound pitch-determining element for electronic musical instrument
US4052923A (en) * 1976-06-22 1977-10-11 Cohn J M Electrical control devices
US4235141A (en) * 1978-09-18 1980-11-25 Eventoff Franklin Neal Electronic apparatus
US4276538A (en) * 1980-01-07 1981-06-30 Franklin N. Eventoff Touch switch keyboard apparatus
US4305321A (en) * 1978-10-10 1981-12-15 Cohn James M Electrical control devices
EP0065587A1 (de) * 1981-05-26 1982-12-01 James Myron Cohn Elektrische Steuerungseinrichtung mit einem Spannungsteiler
US4430918A (en) * 1982-02-16 1984-02-14 University Of Pittsburgh Electronic musical instrument
US4444998A (en) * 1981-10-27 1984-04-24 Spectra-Symbol Corporation Touch controlled membrane for multi axis voltage selection
US4494105A (en) * 1982-03-26 1985-01-15 Spectra-Symbol Corporation Touch-controlled circuit apparatus for voltage selection
US4651123A (en) * 1984-08-06 1987-03-17 International Hydraulic Systems, Inc Linear potentiometer
US4677419A (en) * 1982-02-16 1987-06-30 University Of Pittsburgh Electronic musical instrument
US5033351A (en) * 1988-04-25 1991-07-23 Casio Computer Co., Ltd. Fingerboard and neck for electronic musical instrument
US5079536A (en) * 1990-03-05 1992-01-07 Chapman Emmett H Pressure transducer for musical instrument control
US5403971A (en) * 1990-02-15 1995-04-04 Yamaha Corpoation Electronic musical instrument with portamento function
EP0712113A1 (de) 1994-11-04 1996-05-15 Clavia Digital Musical Instruments Ab Methode und Anordnung zur Änderung der Tonhöhe
US6737990B1 (en) * 1998-01-23 2004-05-18 Spyrus, Inc. Key input apparatus interface
US20060261923A1 (en) * 1999-05-25 2006-11-23 Schrum Allan E Resilient material potentiometer
US20070271048A1 (en) * 2006-02-10 2007-11-22 David Feist Systems using variable resistance zones and stops for generating inputs to an electronic device
US7474772B2 (en) 2003-06-25 2009-01-06 Atrua Technologies, Inc. System and method for a miniature user input device
US7587072B2 (en) 2003-08-22 2009-09-08 Authentec, Inc. System for and method of generating rotational inputs
US8421890B2 (en) 2010-01-15 2013-04-16 Picofield Technologies, Inc. Electronic imager using an impedance sensor grid array and method of making
US8791792B2 (en) 2010-01-15 2014-07-29 Idex Asa Electronic imager using an impedance sensor grid array mounted on or about a switch and method of making
US8866347B2 (en) 2010-01-15 2014-10-21 Idex Asa Biometric image sensing
US9235274B1 (en) 2006-07-25 2016-01-12 Apple Inc. Low-profile or ultra-thin navigation pointing or haptic feedback device
US9798917B2 (en) 2012-04-10 2017-10-24 Idex Asa Biometric sensing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1847119A (en) * 1928-12-19 1932-03-01 Lertes Peter Electrical musical instrument
US2141231A (en) * 1930-03-24 1938-12-27 Trautwein Friedrich Electrical musical instrument

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1847119A (en) * 1928-12-19 1932-03-01 Lertes Peter Electrical musical instrument
US2141231A (en) * 1930-03-24 1938-12-27 Trautwein Friedrich Electrical musical instrument

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776087A (en) * 1969-05-14 1973-12-04 Nippon Musical Instruments Mfg Electronic musical instrument with variable impedance playboard providing portamento
US3699492A (en) * 1970-11-16 1972-10-17 Nippon Musical Instruments Mfg Variable resistance device for a portamento performance on an electronic musical instrument
US3764953A (en) * 1972-09-18 1973-10-09 Gen Motors Corp Rheostats
US3897708A (en) * 1973-05-24 1975-08-05 Yoshiro Suzuki Electrically operated musical instrument
US3895288A (en) * 1973-09-04 1975-07-15 Stephen H Lampen Touch controlled voltage-divider device
JPS5050027U (de) * 1973-09-05 1975-05-16
JPS5317784Y2 (de) * 1973-09-05 1978-05-12
US3965789A (en) * 1974-02-01 1976-06-29 Arp Instruments, Inc. Electronic musical instrument effects control
US3997863A (en) * 1975-04-03 1976-12-14 Norlin Music, Inc. Helically wound pitch-determining element for electronic musical instrument
US4052923A (en) * 1976-06-22 1977-10-11 Cohn J M Electrical control devices
US4235141A (en) * 1978-09-18 1980-11-25 Eventoff Franklin Neal Electronic apparatus
US4305321A (en) * 1978-10-10 1981-12-15 Cohn James M Electrical control devices
US4276538A (en) * 1980-01-07 1981-06-30 Franklin N. Eventoff Touch switch keyboard apparatus
EP0065587A1 (de) * 1981-05-26 1982-12-01 James Myron Cohn Elektrische Steuerungseinrichtung mit einem Spannungsteiler
US4444998A (en) * 1981-10-27 1984-04-24 Spectra-Symbol Corporation Touch controlled membrane for multi axis voltage selection
US4677419A (en) * 1982-02-16 1987-06-30 University Of Pittsburgh Electronic musical instrument
US4430918A (en) * 1982-02-16 1984-02-14 University Of Pittsburgh Electronic musical instrument
US4494105A (en) * 1982-03-26 1985-01-15 Spectra-Symbol Corporation Touch-controlled circuit apparatus for voltage selection
US4651123A (en) * 1984-08-06 1987-03-17 International Hydraulic Systems, Inc Linear potentiometer
US5033351A (en) * 1988-04-25 1991-07-23 Casio Computer Co., Ltd. Fingerboard and neck for electronic musical instrument
US5403971A (en) * 1990-02-15 1995-04-04 Yamaha Corpoation Electronic musical instrument with portamento function
US5079536A (en) * 1990-03-05 1992-01-07 Chapman Emmett H Pressure transducer for musical instrument control
EP0712113A1 (de) 1994-11-04 1996-05-15 Clavia Digital Musical Instruments Ab Methode und Anordnung zur Änderung der Tonhöhe
US5696345A (en) * 1994-11-04 1997-12-09 Clavia Digital Musical Instruments Method and device for varying pitch of electronically generated tones
US6737990B1 (en) * 1998-01-23 2004-05-18 Spyrus, Inc. Key input apparatus interface
US20070063811A1 (en) * 1999-05-25 2007-03-22 Schrum Allan E Linear resilient material variable resistor
US20070194877A1 (en) * 1999-05-25 2007-08-23 Schrum Allan E Resilient material potentiometer
US20070063810A1 (en) * 1999-05-25 2007-03-22 Schrum Allan E Resilient material variable resistor
US20070132544A1 (en) * 1999-05-25 2007-06-14 Schrum Allan E Resilient material variable resistor
US20070132543A1 (en) * 1999-05-25 2007-06-14 Schrum Allan E Resilient material variable resistor
US20070139156A1 (en) * 1999-05-25 2007-06-21 Schrum Allan E Resilient material variable resistor
US20070188294A1 (en) * 1999-05-25 2007-08-16 Schrum Allan E Resilient material potentiometer
US20060261923A1 (en) * 1999-05-25 2006-11-23 Schrum Allan E Resilient material potentiometer
US7788799B2 (en) 1999-05-25 2010-09-07 Authentec, Inc. Linear resilient material variable resistor
US7391296B2 (en) 1999-05-25 2008-06-24 Varatouch Technology Incorporated Resilient material potentiometer
US7629871B2 (en) 1999-05-25 2009-12-08 Authentec, Inc. Resilient material variable resistor
US7474772B2 (en) 2003-06-25 2009-01-06 Atrua Technologies, Inc. System and method for a miniature user input device
US7587072B2 (en) 2003-08-22 2009-09-08 Authentec, Inc. System for and method of generating rotational inputs
US7684953B2 (en) 2006-02-10 2010-03-23 Authentec, Inc. Systems using variable resistance zones and stops for generating inputs to an electronic device
US20070271048A1 (en) * 2006-02-10 2007-11-22 David Feist Systems using variable resistance zones and stops for generating inputs to an electronic device
US9235274B1 (en) 2006-07-25 2016-01-12 Apple Inc. Low-profile or ultra-thin navigation pointing or haptic feedback device
US8421890B2 (en) 2010-01-15 2013-04-16 Picofield Technologies, Inc. Electronic imager using an impedance sensor grid array and method of making
US8866347B2 (en) 2010-01-15 2014-10-21 Idex Asa Biometric image sensing
US8791792B2 (en) 2010-01-15 2014-07-29 Idex Asa Electronic imager using an impedance sensor grid array mounted on or about a switch and method of making
US9268988B2 (en) 2010-01-15 2016-02-23 Idex Asa Biometric image sensing
US9600704B2 (en) 2010-01-15 2017-03-21 Idex Asa Electronic imager using an impedance sensor grid array and method of making
US9659208B2 (en) 2010-01-15 2017-05-23 Idex Asa Biometric image sensing
US10115001B2 (en) 2010-01-15 2018-10-30 Idex Asa Biometric image sensing
US10592719B2 (en) 2010-01-15 2020-03-17 Idex Biometrics Asa Biometric image sensing
US11080504B2 (en) 2010-01-15 2021-08-03 Idex Biometrics Asa Biometric image sensing
US9798917B2 (en) 2012-04-10 2017-10-24 Idex Asa Biometric sensing
US10088939B2 (en) 2012-04-10 2018-10-02 Idex Asa Biometric sensing
US10101851B2 (en) 2012-04-10 2018-10-16 Idex Asa Display with integrated touch screen and fingerprint sensor
US10114497B2 (en) 2012-04-10 2018-10-30 Idex Asa Biometric sensing

Also Published As

Publication number Publication date
DE2007673A1 (de) 1970-09-10
NL152685B (nl) 1977-03-15
NL7002315A (de) 1970-08-24
DE2007673C3 (de) 1980-04-30
DE2007673B2 (de) 1979-08-16

Similar Documents

Publication Publication Date Title
US3624584A (en) Variable resistance device for an electronic musical instrument
US3699492A (en) Variable resistance device for a portamento performance on an electronic musical instrument
US3626350A (en) Variable resistor device for electronic musical instruments capable of playing monophonic, chord and portamento performances with resilient contact strips
US4276538A (en) Touch switch keyboard apparatus
US4301337A (en) Dual lateral switch device
US4235141A (en) Electronic apparatus
US4306480A (en) Electronic musical instrument
US4314227A (en) Electronic pressure sensitive transducer apparatus
US4257305A (en) Pressure sensitive controller for electronic musical instruments
US3593115A (en) Capacitive voltage divider
US4078464A (en) Electronic musical instrument
US4580478A (en) Musical keyboard using planar coil arrays
US3624583A (en) Playing devices for electronic musical instruments
KR900006581B1 (ko) 전자건반악기의 터치제어장치
US2848920A (en) Key contact system for electronic organs
US3694559A (en) Electronic musical instrument employing variable resistor fingerboards
US3769869A (en) Electronic musical instrument keying assembly providing a minimum of electrical noise
US2785238A (en) Tone color assembly for electric organs
US4305321A (en) Electrical control devices
US3776087A (en) Electronic musical instrument with variable impedance playboard providing portamento
US3546353A (en) Monodic electronic musical instrument manually playable without depression of keys
US3911780A (en) Arpeggio keyboard
US4500756A (en) Keyboard switch having a deformable membrane formed of cellular urethane
JPS5812594B2 (ja) デンシガツキ ノ ネイロセイギヨソウチ
US3808346A (en) Movable contact strip adapted for touch responsive tone control electronic musical instrument