GB799312A - Improvements in or relating to capacitive switches - Google Patents

Improvements in or relating to capacitive switches

Info

Publication number
GB799312A
GB799312A GB1030/56A GB103056A GB799312A GB 799312 A GB799312 A GB 799312A GB 1030/56 A GB1030/56 A GB 1030/56A GB 103056 A GB103056 A GB 103056A GB 799312 A GB799312 A GB 799312A
Authority
GB
United Kingdom
Prior art keywords
jan
key
pair
fixed electrodes
relating
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
GB1030/56A
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.)
National Research Council of Canada
Original Assignee
National Research Council of Canada
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 National Research Council of Canada filed Critical National Research Council of Canada
Publication of GB799312A publication Critical patent/GB799312A/en
Expired legal-status Critical Current

Links

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
    • G10H1/0551—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 capacitors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

799,312. Variable capacitors. NATIONAL RESEARCH COUNCIL. Jan. 11, 1956 [Jan. 28, 1955], No. 1030/56. Class 37. [Also in Group XXXVIII] A blade-like electrode 21 is movable from a starting position between a pair of earthed screen members (each consisting of two interconnected parts 66 and 67, Fig. 3) to a position in which a part of it lies between a pair of fixed electrodes 72, 73. The movable electrode is attached to a key 1 of an electrophonic musical instrument (see Group XXXVIII), and the fixed electrodes 72, 73 are two interconnected strips which run the whole length of the keyboard and are common to all the keys. Each key may control a plurality of capacitors, Fig. 2.
GB1030/56A 1955-01-28 1956-01-11 Improvements in or relating to capacitive switches Expired GB799312A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US799312XA 1955-01-28 1955-01-28
US1145749XA 1955-01-28 1955-01-28
US484777A US2809547A (en) 1955-01-28 1955-01-28 Intensity control device for electrical musical instrument

Publications (1)

Publication Number Publication Date
GB799312A true GB799312A (en) 1958-08-06

Family

ID=63721169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1030/56A Expired GB799312A (en) 1955-01-28 1956-01-11 Improvements in or relating to capacitive switches

Country Status (3)

Country Link
US (1) US2809547A (en)
FR (1) FR1145749A (en)
GB (1) GB799312A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0079868A1 (en) * 1981-11-16 1983-05-25 INTERCONTINENTAL ELECTRONICS S.p.A. A device for achieving touch sensitivity in musical instruments provided with a keyboard

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007093A (en) * 1959-03-27 1961-10-31 Rca Corp Variable capacitor
NL267335A (en) * 1961-07-20 1900-01-01
NL298084A (en) * 1963-09-19
US4160400A (en) * 1975-09-29 1979-07-10 Marmon Company Touch responsive keying unit for electronic musical instruments
JP2011123191A (en) * 2009-12-09 2011-06-23 Roland Corp Key operation speed detection device of electronic musical instrument
FR3084507B1 (en) * 2018-07-30 2020-07-17 Arturia ELECTRONIC MUSIC INSTRUMENT KEYBOARD WITH SENSITIVE KEYS FOR SOUND MODULATION

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1738194A (en) * 1929-12-03 Condenser
US2215709A (en) * 1939-03-09 1940-09-24 Miessner Inventions Inc Apparatus for the production of music
BE478263A (en) * 1946-12-17
US2696576A (en) * 1951-07-17 1954-12-07 John A Connor Coaxial capacitor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0079868A1 (en) * 1981-11-16 1983-05-25 INTERCONTINENTAL ELECTRONICS S.p.A. A device for achieving touch sensitivity in musical instruments provided with a keyboard

Also Published As

Publication number Publication date
US2809547A (en) 1957-10-15
FR1145749A (en) 1957-10-29

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